./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/openssl/s3_srvr.blast.16.i.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e943c265 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/config/AutomizerReach.xml -i ../../sv-benchmarks/c/openssl/s3_srvr.blast.16.i.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be --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 0b79f6e49ac032444452c6675a01007f08f3b698920d88701561807a0669494d ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/config/AutomizerReach.xml -i ../../sv-benchmarks/c/openssl/s3_srvr.blast.16.i.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be --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 0b79f6e49ac032444452c6675a01007f08f3b698920d88701561807a0669494d .............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN --- Real Ultimate output --- This is Ultimate 0.2.1-dev-e943c26 [2021-10-21 19:57:57,489 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-21 19:57:57,492 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-21 19:57:57,528 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-21 19:57:57,529 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-21 19:57:57,530 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-21 19:57:57,532 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-21 19:57:57,534 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-21 19:57:57,536 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-21 19:57:57,537 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-21 19:57:57,538 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-21 19:57:57,540 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-21 19:57:57,541 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-21 19:57:57,542 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-21 19:57:57,543 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-21 19:57:57,545 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-21 19:57:57,546 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-21 19:57:57,547 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-21 19:57:57,549 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-21 19:57:57,552 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-21 19:57:57,554 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-21 19:57:57,555 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-21 19:57:57,556 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-21 19:57:57,557 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-21 19:57:57,561 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-21 19:57:57,562 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-21 19:57:57,562 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-21 19:57:57,563 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-21 19:57:57,564 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-21 19:57:57,565 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-21 19:57:57,565 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-21 19:57:57,566 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-21 19:57:57,567 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-21 19:57:57,568 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-21 19:57:57,569 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-21 19:57:57,570 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-21 19:57:57,570 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-21 19:57:57,571 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-21 19:57:57,571 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-21 19:57:57,572 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-21 19:57:57,573 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-21 19:57:57,574 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-21 19:57:57,609 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-21 19:57:57,610 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-21 19:57:57,610 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-21 19:57:57,610 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-21 19:57:57,618 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-21 19:57:57,618 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-21 19:57:57,619 INFO L138 SettingsManager]: * Use SBE=true [2021-10-21 19:57:57,619 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-21 19:57:57,619 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-21 19:57:57,619 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-21 19:57:57,620 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-21 19:57:57,621 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-21 19:57:57,621 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-21 19:57:57,621 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-21 19:57:57,621 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-21 19:57:57,621 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-21 19:57:57,622 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-21 19:57:57,622 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-21 19:57:57,622 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-21 19:57:57,622 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-21 19:57:57,622 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-21 19:57:57,623 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-21 19:57:57,623 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 19:57:57,623 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-21 19:57:57,623 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-21 19:57:57,624 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-21 19:57:57,624 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-21 19:57:57,624 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-21 19:57:57,624 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-21 19:57:57,626 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-21 19:57:57,626 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-21 19:57:57,626 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-21 19:57:57,627 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_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0b79f6e49ac032444452c6675a01007f08f3b698920d88701561807a0669494d [2021-10-21 19:57:57,871 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-21 19:57:57,897 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-21 19:57:57,900 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-21 19:57:57,901 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-21 19:57:57,902 INFO L275 PluginConnector]: CDTParser initialized [2021-10-21 19:57:57,903 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/../../sv-benchmarks/c/openssl/s3_srvr.blast.16.i.cil-1.c [2021-10-21 19:57:57,986 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/data/98484a202/c2c9df209ee943998c733e6ec71348e9/FLAGcb2d67d55 [2021-10-21 19:57:58,610 INFO L306 CDTParser]: Found 1 translation units. [2021-10-21 19:57:58,611 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/sv-benchmarks/c/openssl/s3_srvr.blast.16.i.cil-1.c [2021-10-21 19:57:58,644 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/data/98484a202/c2c9df209ee943998c733e6ec71348e9/FLAGcb2d67d55 [2021-10-21 19:57:58,782 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/data/98484a202/c2c9df209ee943998c733e6ec71348e9 [2021-10-21 19:57:58,786 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-21 19:57:58,787 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-21 19:57:58,792 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-21 19:57:58,792 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-21 19:57:58,795 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-21 19:57:58,797 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 07:57:58" (1/1) ... [2021-10-21 19:57:58,799 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47141b13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:57:58, skipping insertion in model container [2021-10-21 19:57:58,799 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 07:57:58" (1/1) ... [2021-10-21 19:57:58,806 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-21 19:57:58,880 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-21 19:57:59,403 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_d77c1f3f-22e9-4b40-b4e2-d2f354896745/sv-benchmarks/c/openssl/s3_srvr.blast.16.i.cil-1.c[77378,77391] [2021-10-21 19:57:59,412 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 19:57:59,432 INFO L203 MainTranslator]: Completed pre-run [2021-10-21 19:57:59,613 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_d77c1f3f-22e9-4b40-b4e2-d2f354896745/sv-benchmarks/c/openssl/s3_srvr.blast.16.i.cil-1.c[77378,77391] [2021-10-21 19:57:59,624 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 19:57:59,642 INFO L208 MainTranslator]: Completed translation [2021-10-21 19:57:59,643 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:57:59 WrapperNode [2021-10-21 19:57:59,643 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-21 19:57:59,644 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-21 19:57:59,645 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-21 19:57:59,645 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-21 19:57:59,652 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:57:59" (1/1) ... [2021-10-21 19:57:59,692 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:57:59" (1/1) ... [2021-10-21 19:57:59,767 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-21 19:57:59,768 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-21 19:57:59,768 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-21 19:57:59,768 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-21 19:57:59,776 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:57:59" (1/1) ... [2021-10-21 19:57:59,777 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:57:59" (1/1) ... [2021-10-21 19:57:59,795 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:57:59" (1/1) ... [2021-10-21 19:57:59,796 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:57:59" (1/1) ... [2021-10-21 19:57:59,855 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:57:59" (1/1) ... [2021-10-21 19:57:59,869 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:57:59" (1/1) ... [2021-10-21 19:57:59,887 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:57:59" (1/1) ... [2021-10-21 19:57:59,893 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-21 19:57:59,894 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-21 19:57:59,894 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-21 19:57:59,895 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-21 19:57:59,907 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:57:59" (1/1) ... [2021-10-21 19:57:59,915 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 19:57:59,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:57:59,944 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-21 19:57:59,973 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-21 19:57:59,992 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-21 19:57:59,992 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-21 19:57:59,992 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-21 19:57:59,992 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-21 19:57:59,993 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-21 19:57:59,993 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-21 19:57:59,993 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-21 19:57:59,993 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-21 19:57:59,993 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-21 19:58:00,192 WARN L805 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-10-21 19:58:02,667 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2021-10-21 19:58:02,667 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2021-10-21 19:58:02,676 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-21 19:58:02,676 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-21 19:58:02,678 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:58:02 BoogieIcfgContainer [2021-10-21 19:58:02,679 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-21 19:58:02,680 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-21 19:58:02,680 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-21 19:58:02,683 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-21 19:58:02,684 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.10 07:57:58" (1/3) ... [2021-10-21 19:58:02,684 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ce07e94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 07:58:02, skipping insertion in model container [2021-10-21 19:58:02,684 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:57:59" (2/3) ... [2021-10-21 19:58:02,685 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ce07e94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 07:58:02, skipping insertion in model container [2021-10-21 19:58:02,685 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:58:02" (3/3) ... [2021-10-21 19:58:02,686 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_srvr.blast.16.i.cil-1.c [2021-10-21 19:58:02,691 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-21 19:58:02,691 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-21 19:58:02,739 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-21 19:58:02,745 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 [2021-10-21 19:58:02,745 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-21 19:58:02,764 INFO L276 IsEmpty]: Start isEmpty. Operand has 158 states, 156 states have (on average 1.7307692307692308) internal successors, (270), 157 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:02,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-10-21 19:58:02,773 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:58:02,774 INFO L512 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] [2021-10-21 19:58:02,774 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:58:02,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:58:02,780 INFO L82 PathProgramCache]: Analyzing trace with hash -1590777092, now seen corresponding path program 1 times [2021-10-21 19:58:02,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:58:02,789 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057530235] [2021-10-21 19:58:02,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:58:02,790 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:58:02,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:58:03,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:58:03,145 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:58:03,145 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057530235] [2021-10-21 19:58:03,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057530235] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:58:03,146 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:58:03,146 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:58:03,148 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008354374] [2021-10-21 19:58:03,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:58:03,155 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:58:03,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:58:03,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:58:03,177 INFO L87 Difference]: Start difference. First operand has 158 states, 156 states have (on average 1.7307692307692308) internal successors, (270), 157 states have internal predecessors, (270), 0 states have call successors, (0), 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 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:04,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:58:04,080 INFO L93 Difference]: Finished difference Result 341 states and 582 transitions. [2021-10-21 19:58:04,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:58:04,082 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-10-21 19:58:04,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:58:04,094 INFO L225 Difference]: With dead ends: 341 [2021-10-21 19:58:04,094 INFO L226 Difference]: Without dead ends: 173 [2021-10-21 19:58:04,097 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:58:04,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-10-21 19:58:04,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 156. [2021-10-21 19:58:04,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 1.5806451612903225) internal successors, (245), 155 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:04,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 245 transitions. [2021-10-21 19:58:04,143 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 245 transitions. Word has length 45 [2021-10-21 19:58:04,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:58:04,144 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 245 transitions. [2021-10-21 19:58:04,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:04,145 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 245 transitions. [2021-10-21 19:58:04,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-10-21 19:58:04,148 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:58:04,148 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:58:04,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-21 19:58:04,149 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:58:04,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:58:04,150 INFO L82 PathProgramCache]: Analyzing trace with hash 733994132, now seen corresponding path program 1 times [2021-10-21 19:58:04,150 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:58:04,150 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400028738] [2021-10-21 19:58:04,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:58:04,151 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:58:04,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:58:04,339 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:58:04,340 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:58:04,340 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400028738] [2021-10-21 19:58:04,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400028738] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:58:04,341 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:58:04,341 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:58:04,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820106551] [2021-10-21 19:58:04,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:58:04,344 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:58:04,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:58:04,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:58:04,348 INFO L87 Difference]: Start difference. First operand 156 states and 245 transitions. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:05,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:58:05,672 INFO L93 Difference]: Finished difference Result 308 states and 478 transitions. [2021-10-21 19:58:05,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:58:05,673 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-10-21 19:58:05,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:58:05,675 INFO L225 Difference]: With dead ends: 308 [2021-10-21 19:58:05,675 INFO L226 Difference]: Without dead ends: 173 [2021-10-21 19:58:05,676 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:58:05,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-10-21 19:58:05,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 156. [2021-10-21 19:58:05,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 1.5741935483870968) internal successors, (244), 155 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:05,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 244 transitions. [2021-10-21 19:58:05,689 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 244 transitions. Word has length 58 [2021-10-21 19:58:05,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:58:05,690 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 244 transitions. [2021-10-21 19:58:05,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:05,691 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 244 transitions. [2021-10-21 19:58:05,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-10-21 19:58:05,693 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:58:05,693 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:58:05,694 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-21 19:58:05,694 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:58:05,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:58:05,695 INFO L82 PathProgramCache]: Analyzing trace with hash -1974814043, now seen corresponding path program 1 times [2021-10-21 19:58:05,695 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:58:05,695 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642803985] [2021-10-21 19:58:05,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:58:05,696 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:58:05,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:58:05,796 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:58:05,796 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:58:05,797 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642803985] [2021-10-21 19:58:05,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642803985] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:58:05,798 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:58:05,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:58:05,799 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465923064] [2021-10-21 19:58:05,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:58:05,799 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:58:05,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:58:05,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:58:05,804 INFO L87 Difference]: Start difference. First operand 156 states and 244 transitions. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:06,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:58:06,683 INFO L93 Difference]: Finished difference Result 307 states and 476 transitions. [2021-10-21 19:58:06,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:58:06,684 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-10-21 19:58:06,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:58:06,686 INFO L225 Difference]: With dead ends: 307 [2021-10-21 19:58:06,686 INFO L226 Difference]: Without dead ends: 172 [2021-10-21 19:58:06,687 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:58:06,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-10-21 19:58:06,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 156. [2021-10-21 19:58:06,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 1.5677419354838709) internal successors, (243), 155 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:06,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 243 transitions. [2021-10-21 19:58:06,697 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 243 transitions. Word has length 59 [2021-10-21 19:58:06,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:58:06,698 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 243 transitions. [2021-10-21 19:58:06,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:06,698 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 243 transitions. [2021-10-21 19:58:06,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-10-21 19:58:06,701 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:58:06,701 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:58:06,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-21 19:58:06,701 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:58:06,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:58:06,702 INFO L82 PathProgramCache]: Analyzing trace with hash -87910599, now seen corresponding path program 1 times [2021-10-21 19:58:06,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:58:06,702 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160549704] [2021-10-21 19:58:06,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:58:06,703 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:58:06,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:58:06,836 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:58:06,836 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:58:06,837 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160549704] [2021-10-21 19:58:06,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160549704] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:58:06,837 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:58:06,837 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:58:06,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937654136] [2021-10-21 19:58:06,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:58:06,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:58:06,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:58:06,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:58:06,840 INFO L87 Difference]: Start difference. First operand 156 states and 243 transitions. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:09,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:58:09,276 INFO L93 Difference]: Finished difference Result 307 states and 475 transitions. [2021-10-21 19:58:09,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:58:09,277 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-10-21 19:58:09,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:58:09,279 INFO L225 Difference]: With dead ends: 307 [2021-10-21 19:58:09,279 INFO L226 Difference]: Without dead ends: 172 [2021-10-21 19:58:09,280 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:58:09,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-10-21 19:58:09,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 156. [2021-10-21 19:58:09,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 1.5612903225806452) internal successors, (242), 155 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:09,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 242 transitions. [2021-10-21 19:58:09,296 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 242 transitions. Word has length 59 [2021-10-21 19:58:09,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:58:09,298 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 242 transitions. [2021-10-21 19:58:09,301 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:09,301 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 242 transitions. [2021-10-21 19:58:09,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-10-21 19:58:09,309 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:58:09,309 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:58:09,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-21 19:58:09,310 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:58:09,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:58:09,312 INFO L82 PathProgramCache]: Analyzing trace with hash -940027376, now seen corresponding path program 1 times [2021-10-21 19:58:09,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:58:09,312 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860721382] [2021-10-21 19:58:09,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:58:09,313 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:58:09,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:58:09,430 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:58:09,430 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:58:09,431 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860721382] [2021-10-21 19:58:09,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860721382] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:58:09,431 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:58:09,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:58:09,432 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021286622] [2021-10-21 19:58:09,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:58:09,432 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:58:09,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:58:09,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:58:09,433 INFO L87 Difference]: Start difference. First operand 156 states and 242 transitions. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:10,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:58:10,215 INFO L93 Difference]: Finished difference Result 306 states and 473 transitions. [2021-10-21 19:58:10,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:58:10,216 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-10-21 19:58:10,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:58:10,218 INFO L225 Difference]: With dead ends: 306 [2021-10-21 19:58:10,218 INFO L226 Difference]: Without dead ends: 171 [2021-10-21 19:58:10,219 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:58:10,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-10-21 19:58:10,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 156. [2021-10-21 19:58:10,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 1.5548387096774194) internal successors, (241), 155 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:10,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 241 transitions. [2021-10-21 19:58:10,233 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 241 transitions. Word has length 59 [2021-10-21 19:58:10,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:58:10,233 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 241 transitions. [2021-10-21 19:58:10,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:10,234 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 241 transitions. [2021-10-21 19:58:10,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-10-21 19:58:10,235 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:58:10,235 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:58:10,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-21 19:58:10,236 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:58:10,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:58:10,237 INFO L82 PathProgramCache]: Analyzing trace with hash 1351719632, now seen corresponding path program 1 times [2021-10-21 19:58:10,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:58:10,238 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320981421] [2021-10-21 19:58:10,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:58:10,239 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:58:10,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:58:10,339 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:58:10,340 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:58:10,340 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320981421] [2021-10-21 19:58:10,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320981421] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:58:10,341 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:58:10,342 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:58:10,343 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018073179] [2021-10-21 19:58:10,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:58:10,343 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:58:10,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:58:10,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:58:10,350 INFO L87 Difference]: Start difference. First operand 156 states and 241 transitions. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:11,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:58:11,578 INFO L93 Difference]: Finished difference Result 304 states and 470 transitions. [2021-10-21 19:58:11,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:58:11,579 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-10-21 19:58:11,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:58:11,580 INFO L225 Difference]: With dead ends: 304 [2021-10-21 19:58:11,580 INFO L226 Difference]: Without dead ends: 169 [2021-10-21 19:58:11,581 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:58:11,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-10-21 19:58:11,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 156. [2021-10-21 19:58:11,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 1.5483870967741935) internal successors, (240), 155 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:11,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 240 transitions. [2021-10-21 19:58:11,588 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 240 transitions. Word has length 59 [2021-10-21 19:58:11,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:58:11,589 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 240 transitions. [2021-10-21 19:58:11,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:11,589 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 240 transitions. [2021-10-21 19:58:11,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-10-21 19:58:11,590 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:58:11,590 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-10-21 19:58:11,590 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-21 19:58:11,591 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:58:11,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:58:11,591 INFO L82 PathProgramCache]: Analyzing trace with hash -2100701379, now seen corresponding path program 1 times [2021-10-21 19:58:11,591 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:58:11,592 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122296232] [2021-10-21 19:58:11,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:58:11,592 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:58:11,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:58:11,652 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:58:11,652 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:58:11,653 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122296232] [2021-10-21 19:58:11,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122296232] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:58:11,653 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:58:11,653 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:58:11,653 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614300259] [2021-10-21 19:58:11,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:58:11,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:58:11,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:58:11,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:58:11,655 INFO L87 Difference]: Start difference. First operand 156 states and 240 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 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) [2021-10-21 19:58:13,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:58:13,824 INFO L93 Difference]: Finished difference Result 304 states and 469 transitions. [2021-10-21 19:58:13,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:58:13,825 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 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 [2021-10-21 19:58:13,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:58:13,826 INFO L225 Difference]: With dead ends: 304 [2021-10-21 19:58:13,826 INFO L226 Difference]: Without dead ends: 169 [2021-10-21 19:58:13,827 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:58:13,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-10-21 19:58:13,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 156. [2021-10-21 19:58:13,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 1.5419354838709678) internal successors, (239), 155 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:13,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 239 transitions. [2021-10-21 19:58:13,833 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 239 transitions. Word has length 60 [2021-10-21 19:58:13,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:58:13,833 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 239 transitions. [2021-10-21 19:58:13,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 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) [2021-10-21 19:58:13,833 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 239 transitions. [2021-10-21 19:58:13,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-10-21 19:58:13,834 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:58:13,838 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-10-21 19:58:13,838 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-21 19:58:13,838 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:58:13,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:58:13,839 INFO L82 PathProgramCache]: Analyzing trace with hash 1192056574, now seen corresponding path program 1 times [2021-10-21 19:58:13,840 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:58:13,840 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396079991] [2021-10-21 19:58:13,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:58:13,840 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:58:13,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:58:13,941 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:58:13,942 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:58:13,942 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396079991] [2021-10-21 19:58:13,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396079991] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:58:13,943 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:58:13,944 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:58:13,947 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739014901] [2021-10-21 19:58:13,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:58:13,949 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:58:13,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:58:13,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:58:13,950 INFO L87 Difference]: Start difference. First operand 156 states and 239 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:16,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:58:16,048 INFO L93 Difference]: Finished difference Result 304 states and 468 transitions. [2021-10-21 19:58:16,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:58:16,048 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-10-21 19:58:16,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:58:16,050 INFO L225 Difference]: With dead ends: 304 [2021-10-21 19:58:16,050 INFO L226 Difference]: Without dead ends: 169 [2021-10-21 19:58:16,050 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:58:16,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-10-21 19:58:16,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 156. [2021-10-21 19:58:16,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 1.5354838709677419) internal successors, (238), 155 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:16,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 238 transitions. [2021-10-21 19:58:16,056 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 238 transitions. Word has length 61 [2021-10-21 19:58:16,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:58:16,056 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 238 transitions. [2021-10-21 19:58:16,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:16,057 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 238 transitions. [2021-10-21 19:58:16,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-10-21 19:58:16,058 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:58:16,058 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:58:16,058 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-21 19:58:16,059 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:58:16,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:58:16,059 INFO L82 PathProgramCache]: Analyzing trace with hash 1453100706, now seen corresponding path program 1 times [2021-10-21 19:58:16,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:58:16,060 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972338434] [2021-10-21 19:58:16,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:58:16,060 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:58:16,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:58:16,163 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:58:16,163 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:58:16,163 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972338434] [2021-10-21 19:58:16,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972338434] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:58:16,167 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:58:16,167 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:58:16,167 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951155883] [2021-10-21 19:58:16,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:58:16,168 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:58:16,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:58:16,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:58:16,169 INFO L87 Difference]: Start difference. First operand 156 states and 238 transitions. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:17,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:58:17,874 INFO L93 Difference]: Finished difference Result 294 states and 454 transitions. [2021-10-21 19:58:17,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:58:17,879 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 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 62 [2021-10-21 19:58:17,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:58:17,880 INFO L225 Difference]: With dead ends: 294 [2021-10-21 19:58:17,880 INFO L226 Difference]: Without dead ends: 159 [2021-10-21 19:58:17,881 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:58:17,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-10-21 19:58:17,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 156. [2021-10-21 19:58:17,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 1.5290322580645161) internal successors, (237), 155 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:17,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 237 transitions. [2021-10-21 19:58:17,886 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 237 transitions. Word has length 62 [2021-10-21 19:58:17,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:58:17,887 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 237 transitions. [2021-10-21 19:58:17,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:17,887 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 237 transitions. [2021-10-21 19:58:17,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-10-21 19:58:17,888 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:58:17,888 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:58:17,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-21 19:58:17,889 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:58:17,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:58:17,889 INFO L82 PathProgramCache]: Analyzing trace with hash 841227274, now seen corresponding path program 1 times [2021-10-21 19:58:17,890 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:58:17,890 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016188370] [2021-10-21 19:58:17,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:58:17,890 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:58:17,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:58:17,947 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:58:17,947 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:58:17,947 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016188370] [2021-10-21 19:58:17,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016188370] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:58:17,948 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:58:17,948 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:58:17,948 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160208324] [2021-10-21 19:58:17,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:58:17,949 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:58:17,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:58:17,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:58:17,950 INFO L87 Difference]: Start difference. First operand 156 states and 237 transitions. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:18,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:58:18,853 INFO L93 Difference]: Finished difference Result 334 states and 515 transitions. [2021-10-21 19:58:18,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:58:18,853 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 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 62 [2021-10-21 19:58:18,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:58:18,857 INFO L225 Difference]: With dead ends: 334 [2021-10-21 19:58:18,857 INFO L226 Difference]: Without dead ends: 199 [2021-10-21 19:58:18,857 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:58:18,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-10-21 19:58:18,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 178. [2021-10-21 19:58:18,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 1.5536723163841808) internal successors, (275), 177 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:18,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 275 transitions. [2021-10-21 19:58:18,864 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 275 transitions. Word has length 62 [2021-10-21 19:58:18,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:58:18,864 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 275 transitions. [2021-10-21 19:58:18,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:18,865 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 275 transitions. [2021-10-21 19:58:18,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-10-21 19:58:18,866 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:58:18,866 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2021-10-21 19:58:18,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-21 19:58:18,866 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:58:18,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:58:18,867 INFO L82 PathProgramCache]: Analyzing trace with hash -787803578, now seen corresponding path program 1 times [2021-10-21 19:58:18,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:58:18,867 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701799253] [2021-10-21 19:58:18,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:58:18,868 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:58:18,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:58:18,932 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:58:18,933 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:58:18,933 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701799253] [2021-10-21 19:58:18,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701799253] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:58:18,933 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:58:18,934 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:58:18,934 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564143867] [2021-10-21 19:58:18,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:58:18,934 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:58:18,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:58:18,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:58:18,936 INFO L87 Difference]: Start difference. First operand 178 states and 275 transitions. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:19,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:58:19,621 INFO L93 Difference]: Finished difference Result 356 states and 552 transitions. [2021-10-21 19:58:19,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:58:19,622 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-10-21 19:58:19,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:58:19,624 INFO L225 Difference]: With dead ends: 356 [2021-10-21 19:58:19,624 INFO L226 Difference]: Without dead ends: 199 [2021-10-21 19:58:19,624 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:58:19,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-10-21 19:58:19,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 178. [2021-10-21 19:58:19,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 1.5480225988700564) internal successors, (274), 177 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:19,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 274 transitions. [2021-10-21 19:58:19,630 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 274 transitions. Word has length 75 [2021-10-21 19:58:19,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:58:19,631 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 274 transitions. [2021-10-21 19:58:19,631 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:19,631 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 274 transitions. [2021-10-21 19:58:19,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-10-21 19:58:19,632 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:58:19,632 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:58:19,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-10-21 19:58:19,632 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:58:19,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:58:19,652 INFO L82 PathProgramCache]: Analyzing trace with hash -1905902797, now seen corresponding path program 1 times [2021-10-21 19:58:19,652 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:58:19,652 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909368105] [2021-10-21 19:58:19,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:58:19,653 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:58:19,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:58:19,718 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:58:19,718 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:58:19,718 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909368105] [2021-10-21 19:58:19,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909368105] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:58:19,719 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:58:19,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:58:19,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461923314] [2021-10-21 19:58:19,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:58:19,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:58:19,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:58:19,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:58:19,721 INFO L87 Difference]: Start difference. First operand 178 states and 274 transitions. Second operand has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:20,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:58:20,471 INFO L93 Difference]: Finished difference Result 355 states and 549 transitions. [2021-10-21 19:58:20,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:58:20,472 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-10-21 19:58:20,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:58:20,473 INFO L225 Difference]: With dead ends: 355 [2021-10-21 19:58:20,473 INFO L226 Difference]: Without dead ends: 198 [2021-10-21 19:58:20,474 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:58:20,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-10-21 19:58:20,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 178. [2021-10-21 19:58:20,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 1.5423728813559323) internal successors, (273), 177 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:20,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 273 transitions. [2021-10-21 19:58:20,480 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 273 transitions. Word has length 76 [2021-10-21 19:58:20,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:58:20,480 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 273 transitions. [2021-10-21 19:58:20,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:20,481 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 273 transitions. [2021-10-21 19:58:20,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-10-21 19:58:20,481 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:58:20,482 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:58:20,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-10-21 19:58:20,482 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:58:20,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:58:20,483 INFO L82 PathProgramCache]: Analyzing trace with hash -18999353, now seen corresponding path program 1 times [2021-10-21 19:58:20,483 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:58:20,483 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535474892] [2021-10-21 19:58:20,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:58:20,484 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:58:20,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:58:20,534 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:58:20,534 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:58:20,535 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535474892] [2021-10-21 19:58:20,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535474892] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:58:20,535 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:58:20,535 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:58:20,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647734464] [2021-10-21 19:58:20,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:58:20,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:58:20,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:58:20,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:58:20,537 INFO L87 Difference]: Start difference. First operand 178 states and 273 transitions. Second operand has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:22,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:58:22,113 INFO L93 Difference]: Finished difference Result 355 states and 547 transitions. [2021-10-21 19:58:22,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:58:22,114 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-10-21 19:58:22,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:58:22,116 INFO L225 Difference]: With dead ends: 355 [2021-10-21 19:58:22,116 INFO L226 Difference]: Without dead ends: 198 [2021-10-21 19:58:22,116 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:58:22,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-10-21 19:58:22,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 178. [2021-10-21 19:58:22,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 1.536723163841808) internal successors, (272), 177 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:22,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 272 transitions. [2021-10-21 19:58:22,124 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 272 transitions. Word has length 76 [2021-10-21 19:58:22,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:58:22,125 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 272 transitions. [2021-10-21 19:58:22,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:22,126 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 272 transitions. [2021-10-21 19:58:22,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-10-21 19:58:22,127 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:58:22,127 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:58:22,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-10-21 19:58:22,127 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:58:22,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:58:22,128 INFO L82 PathProgramCache]: Analyzing trace with hash -871116130, now seen corresponding path program 1 times [2021-10-21 19:58:22,128 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:58:22,128 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645639022] [2021-10-21 19:58:22,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:58:22,129 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:58:22,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:58:22,198 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:58:22,199 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:58:22,199 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645639022] [2021-10-21 19:58:22,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645639022] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:58:22,199 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:58:22,199 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:58:22,200 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006236799] [2021-10-21 19:58:22,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:58:22,200 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:58:22,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:58:22,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:58:22,201 INFO L87 Difference]: Start difference. First operand 178 states and 272 transitions. Second operand has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:22,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:58:22,960 INFO L93 Difference]: Finished difference Result 354 states and 544 transitions. [2021-10-21 19:58:22,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:58:22,961 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-10-21 19:58:22,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:58:22,962 INFO L225 Difference]: With dead ends: 354 [2021-10-21 19:58:22,962 INFO L226 Difference]: Without dead ends: 197 [2021-10-21 19:58:22,963 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:58:22,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-10-21 19:58:22,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 178. [2021-10-21 19:58:22,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 1.5310734463276836) internal successors, (271), 177 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:22,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 271 transitions. [2021-10-21 19:58:22,969 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 271 transitions. Word has length 76 [2021-10-21 19:58:22,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:58:22,969 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 271 transitions. [2021-10-21 19:58:22,969 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:22,969 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 271 transitions. [2021-10-21 19:58:22,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-10-21 19:58:22,971 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:58:22,971 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:58:22,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-10-21 19:58:22,971 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:58:22,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:58:22,972 INFO L82 PathProgramCache]: Analyzing trace with hash 1420630878, now seen corresponding path program 1 times [2021-10-21 19:58:22,972 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:58:22,972 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417459036] [2021-10-21 19:58:22,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:58:22,973 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:58:22,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:58:23,023 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:58:23,023 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:58:23,023 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417459036] [2021-10-21 19:58:23,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417459036] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:58:23,024 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:58:23,024 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:58:23,024 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444937904] [2021-10-21 19:58:23,024 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:58:23,025 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:58:23,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:58:23,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:58:23,026 INFO L87 Difference]: Start difference. First operand 178 states and 271 transitions. Second operand has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:23,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:58:23,785 INFO L93 Difference]: Finished difference Result 352 states and 540 transitions. [2021-10-21 19:58:23,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:58:23,786 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-10-21 19:58:23,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:58:23,787 INFO L225 Difference]: With dead ends: 352 [2021-10-21 19:58:23,787 INFO L226 Difference]: Without dead ends: 195 [2021-10-21 19:58:23,788 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:58:23,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-10-21 19:58:23,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 178. [2021-10-21 19:58:23,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 1.5254237288135593) internal successors, (270), 177 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:23,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 270 transitions. [2021-10-21 19:58:23,794 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 270 transitions. Word has length 76 [2021-10-21 19:58:23,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:58:23,795 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 270 transitions. [2021-10-21 19:58:23,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:23,795 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 270 transitions. [2021-10-21 19:58:23,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-10-21 19:58:23,796 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:58:23,796 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:58:23,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-10-21 19:58:23,797 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:58:23,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:58:23,797 INFO L82 PathProgramCache]: Analyzing trace with hash 35547247, now seen corresponding path program 1 times [2021-10-21 19:58:23,797 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:58:23,797 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654118940] [2021-10-21 19:58:23,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:58:23,798 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:58:23,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:58:23,852 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:58:23,852 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:58:23,853 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654118940] [2021-10-21 19:58:23,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654118940] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:58:23,855 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:58:23,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:58:23,855 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963551029] [2021-10-21 19:58:23,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:58:23,856 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:58:23,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:58:23,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:58:23,857 INFO L87 Difference]: Start difference. First operand 178 states and 270 transitions. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 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) [2021-10-21 19:58:24,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:58:24,445 INFO L93 Difference]: Finished difference Result 352 states and 538 transitions. [2021-10-21 19:58:24,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:58:24,446 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-10-21 19:58:24,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:58:24,448 INFO L225 Difference]: With dead ends: 352 [2021-10-21 19:58:24,448 INFO L226 Difference]: Without dead ends: 195 [2021-10-21 19:58:24,448 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:58:24,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-10-21 19:58:24,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 178. [2021-10-21 19:58:24,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 1.5197740112994351) internal successors, (269), 177 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:24,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 269 transitions. [2021-10-21 19:58:24,455 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 269 transitions. Word has length 77 [2021-10-21 19:58:24,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:58:24,455 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 269 transitions. [2021-10-21 19:58:24,455 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 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) [2021-10-21 19:58:24,456 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 269 transitions. [2021-10-21 19:58:24,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-10-21 19:58:24,457 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:58:24,457 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:58:24,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-10-21 19:58:24,457 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:58:24,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:58:24,458 INFO L82 PathProgramCache]: Analyzing trace with hash -1303712756, now seen corresponding path program 1 times [2021-10-21 19:58:24,458 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:58:24,458 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593457715] [2021-10-21 19:58:24,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:58:24,459 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:58:24,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:58:24,510 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:58:24,510 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:58:24,510 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593457715] [2021-10-21 19:58:24,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593457715] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:58:24,511 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:58:24,511 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:58:24,511 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448544979] [2021-10-21 19:58:24,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:58:24,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:58:24,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:58:24,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:58:24,513 INFO L87 Difference]: Start difference. First operand 178 states and 269 transitions. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 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) [2021-10-21 19:58:25,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:58:25,939 INFO L93 Difference]: Finished difference Result 352 states and 536 transitions. [2021-10-21 19:58:25,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:58:25,940 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2021-10-21 19:58:25,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:58:25,941 INFO L225 Difference]: With dead ends: 352 [2021-10-21 19:58:25,941 INFO L226 Difference]: Without dead ends: 195 [2021-10-21 19:58:25,942 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:58:25,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-10-21 19:58:25,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 178. [2021-10-21 19:58:25,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 1.5141242937853108) internal successors, (268), 177 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:25,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 268 transitions. [2021-10-21 19:58:25,948 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 268 transitions. Word has length 78 [2021-10-21 19:58:25,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:58:25,948 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 268 transitions. [2021-10-21 19:58:25,949 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 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) [2021-10-21 19:58:25,949 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 268 transitions. [2021-10-21 19:58:25,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-10-21 19:58:25,950 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:58:25,950 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:58:25,950 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-10-21 19:58:25,950 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:58:25,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:58:25,951 INFO L82 PathProgramCache]: Analyzing trace with hash 1393662804, now seen corresponding path program 1 times [2021-10-21 19:58:25,951 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:58:25,951 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341103681] [2021-10-21 19:58:25,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:58:25,951 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:58:25,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:58:26,002 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:58:26,002 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:58:26,003 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341103681] [2021-10-21 19:58:26,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341103681] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:58:26,003 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:58:26,003 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:58:26,003 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553158168] [2021-10-21 19:58:26,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:58:26,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:58:26,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:58:26,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:58:26,006 INFO L87 Difference]: Start difference. First operand 178 states and 268 transitions. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 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) [2021-10-21 19:58:26,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:58:26,768 INFO L93 Difference]: Finished difference Result 342 states and 521 transitions. [2021-10-21 19:58:26,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:58:26,769 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-10-21 19:58:26,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:58:26,770 INFO L225 Difference]: With dead ends: 342 [2021-10-21 19:58:26,770 INFO L226 Difference]: Without dead ends: 185 [2021-10-21 19:58:26,771 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:58:26,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-10-21 19:58:26,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 178. [2021-10-21 19:58:26,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 1.5084745762711864) internal successors, (267), 177 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:26,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 267 transitions. [2021-10-21 19:58:26,776 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 267 transitions. Word has length 79 [2021-10-21 19:58:26,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:58:26,777 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 267 transitions. [2021-10-21 19:58:26,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 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) [2021-10-21 19:58:26,777 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 267 transitions. [2021-10-21 19:58:26,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-10-21 19:58:26,778 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:58:26,778 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-10-21 19:58:26,778 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-10-21 19:58:26,778 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:58:26,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:58:26,779 INFO L82 PathProgramCache]: Analyzing trace with hash 1757522637, now seen corresponding path program 1 times [2021-10-21 19:58:26,779 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:58:26,779 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218142106] [2021-10-21 19:58:26,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:58:26,779 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:58:26,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:58:26,858 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-21 19:58:26,858 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:58:26,858 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218142106] [2021-10-21 19:58:26,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218142106] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:58:26,859 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:58:26,859 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:58:26,859 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974258223] [2021-10-21 19:58:26,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:58:26,860 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:58:26,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:58:26,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:58:26,861 INFO L87 Difference]: Start difference. First operand 178 states and 267 transitions. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:28,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:58:28,701 INFO L93 Difference]: Finished difference Result 448 states and 686 transitions. [2021-10-21 19:58:28,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:58:28,702 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2021-10-21 19:58:28,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:58:28,704 INFO L225 Difference]: With dead ends: 448 [2021-10-21 19:58:28,704 INFO L226 Difference]: Without dead ends: 291 [2021-10-21 19:58:28,704 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:58:28,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2021-10-21 19:58:28,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 219. [2021-10-21 19:58:28,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 1.5642201834862386) internal successors, (341), 218 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:28,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 341 transitions. [2021-10-21 19:58:28,712 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 341 transitions. Word has length 84 [2021-10-21 19:58:28,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:58:28,713 INFO L470 AbstractCegarLoop]: Abstraction has 219 states and 341 transitions. [2021-10-21 19:58:28,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:28,713 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 341 transitions. [2021-10-21 19:58:28,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-10-21 19:58:28,714 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:58:28,715 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-10-21 19:58:28,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-10-21 19:58:28,715 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:58:28,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:58:28,716 INFO L82 PathProgramCache]: Analyzing trace with hash -2113797937, now seen corresponding path program 1 times [2021-10-21 19:58:28,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:58:28,716 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948426127] [2021-10-21 19:58:28,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:58:28,716 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:58:28,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:58:28,804 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-21 19:58:28,805 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:58:28,805 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948426127] [2021-10-21 19:58:28,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948426127] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:58:28,805 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:58:28,805 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:58:28,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611667602] [2021-10-21 19:58:28,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:58:28,806 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:58:28,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:58:28,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:58:28,807 INFO L87 Difference]: Start difference. First operand 219 states and 341 transitions. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:30,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:58:30,601 INFO L93 Difference]: Finished difference Result 467 states and 734 transitions. [2021-10-21 19:58:30,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:58:30,602 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2021-10-21 19:58:30,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:58:30,604 INFO L225 Difference]: With dead ends: 467 [2021-10-21 19:58:30,604 INFO L226 Difference]: Without dead ends: 269 [2021-10-21 19:58:30,605 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:58:30,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2021-10-21 19:58:30,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 243. [2021-10-21 19:58:30,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 242 states have (on average 1.5826446280991735) internal successors, (383), 242 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:30,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 383 transitions. [2021-10-21 19:58:30,614 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 383 transitions. Word has length 84 [2021-10-21 19:58:30,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:58:30,616 INFO L470 AbstractCegarLoop]: Abstraction has 243 states and 383 transitions. [2021-10-21 19:58:30,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:30,616 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 383 transitions. [2021-10-21 19:58:30,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-10-21 19:58:30,617 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:58:30,618 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-10-21 19:58:30,618 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-10-21 19:58:30,618 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:58:30,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:58:30,618 INFO L82 PathProgramCache]: Analyzing trace with hash -238422134, now seen corresponding path program 1 times [2021-10-21 19:58:30,619 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:58:30,619 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902687358] [2021-10-21 19:58:30,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:58:30,619 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:58:30,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:58:30,688 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-21 19:58:30,688 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:58:30,689 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902687358] [2021-10-21 19:58:30,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902687358] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:58:30,689 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:58:30,689 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:58:30,689 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227578986] [2021-10-21 19:58:30,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:58:30,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:58:30,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:58:30,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:58:30,692 INFO L87 Difference]: Start difference. First operand 243 states and 383 transitions. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:31,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:58:31,728 INFO L93 Difference]: Finished difference Result 529 states and 832 transitions. [2021-10-21 19:58:31,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:58:31,729 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-10-21 19:58:31,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:58:31,730 INFO L225 Difference]: With dead ends: 529 [2021-10-21 19:58:31,730 INFO L226 Difference]: Without dead ends: 307 [2021-10-21 19:58:31,731 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:58:31,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2021-10-21 19:58:31,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 244. [2021-10-21 19:58:31,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 243 states have (on average 1.5802469135802468) internal successors, (384), 243 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:31,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 384 transitions. [2021-10-21 19:58:31,739 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 384 transitions. Word has length 85 [2021-10-21 19:58:31,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:58:31,740 INFO L470 AbstractCegarLoop]: Abstraction has 244 states and 384 transitions. [2021-10-21 19:58:31,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:31,740 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 384 transitions. [2021-10-21 19:58:31,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-10-21 19:58:31,741 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:58:31,741 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 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] [2021-10-21 19:58:31,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-10-21 19:58:31,742 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:58:31,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:58:31,742 INFO L82 PathProgramCache]: Analyzing trace with hash 324327523, now seen corresponding path program 1 times [2021-10-21 19:58:31,742 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:58:31,743 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968460266] [2021-10-21 19:58:31,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:58:31,743 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:58:31,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:58:31,819 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-21 19:58:31,820 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:58:31,820 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968460266] [2021-10-21 19:58:31,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968460266] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:58:31,820 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:58:31,820 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:58:31,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951351067] [2021-10-21 19:58:31,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:58:31,821 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:58:31,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:58:31,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:58:31,822 INFO L87 Difference]: Start difference. First operand 244 states and 384 transitions. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:33,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:58:33,466 INFO L93 Difference]: Finished difference Result 530 states and 832 transitions. [2021-10-21 19:58:33,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:58:33,469 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 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 97 [2021-10-21 19:58:33,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:58:33,471 INFO L225 Difference]: With dead ends: 530 [2021-10-21 19:58:33,471 INFO L226 Difference]: Without dead ends: 307 [2021-10-21 19:58:33,472 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:58:33,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2021-10-21 19:58:33,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 244. [2021-10-21 19:58:33,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 243 states have (on average 1.5761316872427984) internal successors, (383), 243 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:33,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 383 transitions. [2021-10-21 19:58:33,480 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 383 transitions. Word has length 97 [2021-10-21 19:58:33,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:58:33,480 INFO L470 AbstractCegarLoop]: Abstraction has 244 states and 383 transitions. [2021-10-21 19:58:33,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:33,481 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 383 transitions. [2021-10-21 19:58:33,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-10-21 19:58:33,482 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:58:33,482 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 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] [2021-10-21 19:58:33,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-10-21 19:58:33,482 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:58:33,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:58:33,483 INFO L82 PathProgramCache]: Analyzing trace with hash 1200346529, now seen corresponding path program 1 times [2021-10-21 19:58:33,483 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:58:33,483 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886653735] [2021-10-21 19:58:33,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:58:33,483 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:58:33,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:58:33,551 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-21 19:58:33,551 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:58:33,551 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886653735] [2021-10-21 19:58:33,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886653735] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:58:33,552 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:58:33,552 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:58:33,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383262475] [2021-10-21 19:58:33,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:58:33,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:58:33,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:58:33,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:58:33,555 INFO L87 Difference]: Start difference. First operand 244 states and 383 transitions. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:34,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:58:34,178 INFO L93 Difference]: Finished difference Result 493 states and 775 transitions. [2021-10-21 19:58:34,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:58:34,178 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 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 97 [2021-10-21 19:58:34,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:58:34,180 INFO L225 Difference]: With dead ends: 493 [2021-10-21 19:58:34,180 INFO L226 Difference]: Without dead ends: 270 [2021-10-21 19:58:34,181 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:58:34,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2021-10-21 19:58:34,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 244. [2021-10-21 19:58:34,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 243 states have (on average 1.5720164609053497) internal successors, (382), 243 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:34,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 382 transitions. [2021-10-21 19:58:34,189 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 382 transitions. Word has length 97 [2021-10-21 19:58:34,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:58:34,189 INFO L470 AbstractCegarLoop]: Abstraction has 244 states and 382 transitions. [2021-10-21 19:58:34,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:34,190 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 382 transitions. [2021-10-21 19:58:34,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-10-21 19:58:34,191 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:58:34,191 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-10-21 19:58:34,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-10-21 19:58:34,191 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:58:34,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:58:34,192 INFO L82 PathProgramCache]: Analyzing trace with hash -1789577034, now seen corresponding path program 1 times [2021-10-21 19:58:34,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:58:34,192 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061411327] [2021-10-21 19:58:34,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:58:34,193 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:58:34,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:58:34,255 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-21 19:58:34,255 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:58:34,256 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061411327] [2021-10-21 19:58:34,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061411327] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:58:34,256 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:58:34,256 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:58:34,256 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262311913] [2021-10-21 19:58:34,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:58:34,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:58:34,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:58:34,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:58:34,258 INFO L87 Difference]: Start difference. First operand 244 states and 382 transitions. Second operand has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:36,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:58:36,156 INFO L93 Difference]: Finished difference Result 529 states and 827 transitions. [2021-10-21 19:58:36,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:58:36,157 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 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 98 [2021-10-21 19:58:36,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:58:36,158 INFO L225 Difference]: With dead ends: 529 [2021-10-21 19:58:36,158 INFO L226 Difference]: Without dead ends: 306 [2021-10-21 19:58:36,159 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:58:36,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2021-10-21 19:58:36,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 244. [2021-10-21 19:58:36,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 243 states have (on average 1.5679012345679013) internal successors, (381), 243 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:36,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 381 transitions. [2021-10-21 19:58:36,165 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 381 transitions. Word has length 98 [2021-10-21 19:58:36,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:58:36,165 INFO L470 AbstractCegarLoop]: Abstraction has 244 states and 381 transitions. [2021-10-21 19:58:36,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:36,166 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 381 transitions. [2021-10-21 19:58:36,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-10-21 19:58:36,167 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:58:36,167 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-10-21 19:58:36,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-10-21 19:58:36,168 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:58:36,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:58:36,168 INFO L82 PathProgramCache]: Analyzing trace with hash 97326410, now seen corresponding path program 1 times [2021-10-21 19:58:36,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:58:36,169 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605819855] [2021-10-21 19:58:36,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:58:36,169 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:58:36,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:58:36,246 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-10-21 19:58:36,246 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:58:36,247 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605819855] [2021-10-21 19:58:36,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605819855] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:58:36,247 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:58:36,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-21 19:58:36,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690843863] [2021-10-21 19:58:36,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-21 19:58:36,248 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:58:36,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-21 19:58:36,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:58:36,249 INFO L87 Difference]: Start difference. First operand 244 states and 381 transitions. Second operand has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:37,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:58:37,582 INFO L93 Difference]: Finished difference Result 488 states and 767 transitions. [2021-10-21 19:58:37,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-21 19:58:37,583 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2021-10-21 19:58:37,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:58:37,584 INFO L225 Difference]: With dead ends: 488 [2021-10-21 19:58:37,584 INFO L226 Difference]: Without dead ends: 265 [2021-10-21 19:58:37,585 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 27.4ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-21 19:58:37,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2021-10-21 19:58:37,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 264. [2021-10-21 19:58:37,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 1.5475285171102662) internal successors, (407), 263 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:37,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 407 transitions. [2021-10-21 19:58:37,594 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 407 transitions. Word has length 98 [2021-10-21 19:58:37,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:58:37,594 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 407 transitions. [2021-10-21 19:58:37,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:37,594 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 407 transitions. [2021-10-21 19:58:37,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-10-21 19:58:37,596 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:58:37,596 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 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] [2021-10-21 19:58:37,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-10-21 19:58:37,596 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:58:37,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:58:37,597 INFO L82 PathProgramCache]: Analyzing trace with hash -754790367, now seen corresponding path program 1 times [2021-10-21 19:58:37,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:58:37,597 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218418469] [2021-10-21 19:58:37,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:58:37,598 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:58:37,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:58:37,661 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-21 19:58:37,661 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:58:37,661 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218418469] [2021-10-21 19:58:37,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218418469] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:58:37,662 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:58:37,662 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:58:37,662 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402048] [2021-10-21 19:58:37,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:58:37,662 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:58:37,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:58:37,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:58:37,664 INFO L87 Difference]: Start difference. First operand 264 states and 407 transitions. Second operand has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:38,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:58:38,793 INFO L93 Difference]: Finished difference Result 568 states and 875 transitions. [2021-10-21 19:58:38,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:58:38,793 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 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 98 [2021-10-21 19:58:38,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:58:38,795 INFO L225 Difference]: With dead ends: 568 [2021-10-21 19:58:38,795 INFO L226 Difference]: Without dead ends: 325 [2021-10-21 19:58:38,796 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:58:38,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2021-10-21 19:58:38,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 264. [2021-10-21 19:58:38,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 1.543726235741445) internal successors, (406), 263 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:38,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 406 transitions. [2021-10-21 19:58:38,806 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 406 transitions. Word has length 98 [2021-10-21 19:58:38,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:58:38,807 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 406 transitions. [2021-10-21 19:58:38,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:38,807 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 406 transitions. [2021-10-21 19:58:38,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-10-21 19:58:38,808 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:58:38,809 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 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] [2021-10-21 19:58:38,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-10-21 19:58:38,809 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:58:38,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:58:38,810 INFO L82 PathProgramCache]: Analyzing trace with hash 1536956641, now seen corresponding path program 1 times [2021-10-21 19:58:38,810 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:58:38,810 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502983624] [2021-10-21 19:58:38,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:58:38,810 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:58:38,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:58:38,926 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-21 19:58:38,927 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:58:38,927 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502983624] [2021-10-21 19:58:38,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502983624] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:58:38,927 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:58:38,927 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:58:38,928 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507342323] [2021-10-21 19:58:38,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:58:38,928 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:58:38,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:58:38,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:58:38,929 INFO L87 Difference]: Start difference. First operand 264 states and 406 transitions. Second operand has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:40,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:58:40,231 INFO L93 Difference]: Finished difference Result 566 states and 871 transitions. [2021-10-21 19:58:40,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:58:40,232 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 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 98 [2021-10-21 19:58:40,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:58:40,233 INFO L225 Difference]: With dead ends: 566 [2021-10-21 19:58:40,234 INFO L226 Difference]: Without dead ends: 323 [2021-10-21 19:58:40,234 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:58:40,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2021-10-21 19:58:40,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 264. [2021-10-21 19:58:40,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 1.5399239543726235) internal successors, (405), 263 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:40,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 405 transitions. [2021-10-21 19:58:40,243 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 405 transitions. Word has length 98 [2021-10-21 19:58:40,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:58:40,244 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 405 transitions. [2021-10-21 19:58:40,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:40,244 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 405 transitions. [2021-10-21 19:58:40,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-10-21 19:58:40,245 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:58:40,246 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 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] [2021-10-21 19:58:40,246 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-10-21 19:58:40,246 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:58:40,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:58:40,247 INFO L82 PathProgramCache]: Analyzing trace with hash 631995043, now seen corresponding path program 1 times [2021-10-21 19:58:40,247 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:58:40,247 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475826888] [2021-10-21 19:58:40,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:58:40,247 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:58:40,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:58:40,305 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-21 19:58:40,305 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:58:40,306 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475826888] [2021-10-21 19:58:40,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475826888] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:58:40,306 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:58:40,306 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:58:40,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585899774] [2021-10-21 19:58:40,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:58:40,307 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:58:40,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:58:40,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:58:40,308 INFO L87 Difference]: Start difference. First operand 264 states and 405 transitions. Second operand has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:42,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:58:42,111 INFO L93 Difference]: Finished difference Result 531 states and 816 transitions. [2021-10-21 19:58:42,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:58:42,111 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 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 98 [2021-10-21 19:58:42,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:58:42,113 INFO L225 Difference]: With dead ends: 531 [2021-10-21 19:58:42,113 INFO L226 Difference]: Without dead ends: 288 [2021-10-21 19:58:42,114 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:58:42,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2021-10-21 19:58:42,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 264. [2021-10-21 19:58:42,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 1.5361216730038023) internal successors, (404), 263 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:42,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 404 transitions. [2021-10-21 19:58:42,123 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 404 transitions. Word has length 98 [2021-10-21 19:58:42,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:58:42,124 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 404 transitions. [2021-10-21 19:58:42,124 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:42,124 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 404 transitions. [2021-10-21 19:58:42,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-10-21 19:58:42,125 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:58:42,125 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 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] [2021-10-21 19:58:42,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-10-21 19:58:42,126 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:58:42,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:58:42,126 INFO L82 PathProgramCache]: Analyzing trace with hash -1371225245, now seen corresponding path program 1 times [2021-10-21 19:58:42,126 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:58:42,127 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35263693] [2021-10-21 19:58:42,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:58:42,127 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:58:42,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:58:42,202 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-21 19:58:42,203 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:58:42,203 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35263693] [2021-10-21 19:58:42,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35263693] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:58:42,203 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:58:42,203 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:58:42,204 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49381310] [2021-10-21 19:58:42,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:58:42,204 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:58:42,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:58:42,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:58:42,205 INFO L87 Difference]: Start difference. First operand 264 states and 404 transitions. Second operand has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:43,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:58:43,896 INFO L93 Difference]: Finished difference Result 529 states and 812 transitions. [2021-10-21 19:58:43,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:58:43,896 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 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 98 [2021-10-21 19:58:43,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:58:43,898 INFO L225 Difference]: With dead ends: 529 [2021-10-21 19:58:43,898 INFO L226 Difference]: Without dead ends: 286 [2021-10-21 19:58:43,898 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:58:43,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-10-21 19:58:43,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 264. [2021-10-21 19:58:43,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 1.532319391634981) internal successors, (403), 263 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:43,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 403 transitions. [2021-10-21 19:58:43,909 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 403 transitions. Word has length 98 [2021-10-21 19:58:43,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:58:43,910 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 403 transitions. [2021-10-21 19:58:43,910 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:43,910 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 403 transitions. [2021-10-21 19:58:43,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-10-21 19:58:43,911 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:58:43,911 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-10-21 19:58:43,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-10-21 19:58:43,912 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:58:43,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:58:43,912 INFO L82 PathProgramCache]: Analyzing trace with hash 9038079, now seen corresponding path program 1 times [2021-10-21 19:58:43,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:58:43,913 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032471830] [2021-10-21 19:58:43,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:58:43,913 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:58:43,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:58:43,973 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-21 19:58:43,973 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:58:43,974 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032471830] [2021-10-21 19:58:43,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032471830] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:58:43,974 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:58:43,974 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:58:43,974 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349060745] [2021-10-21 19:58:43,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:58:43,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:58:43,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:58:43,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:58:43,976 INFO L87 Difference]: Start difference. First operand 264 states and 403 transitions. Second operand has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:46,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:58:46,353 INFO L93 Difference]: Finished difference Result 566 states and 865 transitions. [2021-10-21 19:58:46,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:58:46,353 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 99 [2021-10-21 19:58:46,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:58:46,355 INFO L225 Difference]: With dead ends: 566 [2021-10-21 19:58:46,356 INFO L226 Difference]: Without dead ends: 323 [2021-10-21 19:58:46,356 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:58:46,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2021-10-21 19:58:46,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 264. [2021-10-21 19:58:46,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 1.5285171102661597) internal successors, (402), 263 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:46,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 402 transitions. [2021-10-21 19:58:46,366 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 402 transitions. Word has length 99 [2021-10-21 19:58:46,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:58:46,366 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 402 transitions. [2021-10-21 19:58:46,367 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:46,368 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 402 transitions. [2021-10-21 19:58:46,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-10-21 19:58:46,369 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:58:46,369 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-10-21 19:58:46,369 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-10-21 19:58:46,369 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:58:46,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:58:46,370 INFO L82 PathProgramCache]: Analyzing trace with hash 49712829, now seen corresponding path program 1 times [2021-10-21 19:58:46,370 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:58:46,370 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868410285] [2021-10-21 19:58:46,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:58:46,371 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:58:46,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:58:46,438 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-21 19:58:46,438 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:58:46,438 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868410285] [2021-10-21 19:58:46,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868410285] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:58:46,439 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:58:46,439 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:58:46,439 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510760073] [2021-10-21 19:58:46,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:58:46,440 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:58:46,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:58:46,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:58:46,441 INFO L87 Difference]: Start difference. First operand 264 states and 402 transitions. Second operand has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:47,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:58:47,356 INFO L93 Difference]: Finished difference Result 529 states and 808 transitions. [2021-10-21 19:58:47,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:58:47,356 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 99 [2021-10-21 19:58:47,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:58:47,358 INFO L225 Difference]: With dead ends: 529 [2021-10-21 19:58:47,358 INFO L226 Difference]: Without dead ends: 286 [2021-10-21 19:58:47,358 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:58:47,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-10-21 19:58:47,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 264. [2021-10-21 19:58:47,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 1.5247148288973384) internal successors, (401), 263 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:47,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 401 transitions. [2021-10-21 19:58:47,367 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 401 transitions. Word has length 99 [2021-10-21 19:58:47,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:58:47,368 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 401 transitions. [2021-10-21 19:58:47,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:47,368 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 401 transitions. [2021-10-21 19:58:47,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-10-21 19:58:47,369 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:58:47,369 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-10-21 19:58:47,370 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-10-21 19:58:47,370 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:58:47,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:58:47,370 INFO L82 PathProgramCache]: Analyzing trace with hash -1786207427, now seen corresponding path program 1 times [2021-10-21 19:58:47,371 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:58:47,371 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338763160] [2021-10-21 19:58:47,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:58:47,371 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:58:47,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:58:47,428 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-21 19:58:47,428 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:58:47,428 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338763160] [2021-10-21 19:58:47,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338763160] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:58:47,428 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:58:47,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:58:47,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351634368] [2021-10-21 19:58:47,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:58:47,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:58:47,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:58:47,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:58:47,430 INFO L87 Difference]: Start difference. First operand 264 states and 401 transitions. Second operand has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:49,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:58:49,771 INFO L93 Difference]: Finished difference Result 566 states and 861 transitions. [2021-10-21 19:58:49,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:58:49,771 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-10-21 19:58:49,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:58:49,773 INFO L225 Difference]: With dead ends: 566 [2021-10-21 19:58:49,774 INFO L226 Difference]: Without dead ends: 323 [2021-10-21 19:58:49,774 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:58:49,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2021-10-21 19:58:49,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 264. [2021-10-21 19:58:49,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 1.520912547528517) internal successors, (400), 263 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:49,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 400 transitions. [2021-10-21 19:58:49,783 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 400 transitions. Word has length 100 [2021-10-21 19:58:49,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:58:49,784 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 400 transitions. [2021-10-21 19:58:49,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:49,784 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 400 transitions. [2021-10-21 19:58:49,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-10-21 19:58:49,785 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:58:49,785 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-10-21 19:58:49,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-10-21 19:58:49,786 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:58:49,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:58:49,786 INFO L82 PathProgramCache]: Analyzing trace with hash -525290177, now seen corresponding path program 1 times [2021-10-21 19:58:49,786 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:58:49,787 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409772232] [2021-10-21 19:58:49,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:58:49,787 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:58:49,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:58:49,845 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-21 19:58:49,846 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:58:49,846 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409772232] [2021-10-21 19:58:49,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409772232] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:58:49,846 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:58:49,846 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:58:49,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477305027] [2021-10-21 19:58:49,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:58:49,847 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:58:49,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:58:49,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:58:49,848 INFO L87 Difference]: Start difference. First operand 264 states and 400 transitions. Second operand has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:51,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:58:51,252 INFO L93 Difference]: Finished difference Result 529 states and 804 transitions. [2021-10-21 19:58:51,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:58:51,253 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-10-21 19:58:51,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:58:51,255 INFO L225 Difference]: With dead ends: 529 [2021-10-21 19:58:51,256 INFO L226 Difference]: Without dead ends: 286 [2021-10-21 19:58:51,258 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:58:51,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-10-21 19:58:51,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 264. [2021-10-21 19:58:51,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 1.5171102661596958) internal successors, (399), 263 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:51,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 399 transitions. [2021-10-21 19:58:51,292 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 399 transitions. Word has length 100 [2021-10-21 19:58:51,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:58:51,292 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 399 transitions. [2021-10-21 19:58:51,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:51,293 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 399 transitions. [2021-10-21 19:58:51,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-10-21 19:58:51,294 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:58:51,294 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-10-21 19:58:51,294 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-10-21 19:58:51,294 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:58:51,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:58:51,295 INFO L82 PathProgramCache]: Analyzing trace with hash -1051305446, now seen corresponding path program 1 times [2021-10-21 19:58:51,295 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:58:51,295 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219998669] [2021-10-21 19:58:51,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:58:51,295 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:58:51,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:58:51,358 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-21 19:58:51,358 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:58:51,358 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219998669] [2021-10-21 19:58:51,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219998669] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:58:51,359 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:58:51,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:58:51,359 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748174117] [2021-10-21 19:58:51,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:58:51,360 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:58:51,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:58:51,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:58:51,361 INFO L87 Difference]: Start difference. First operand 264 states and 399 transitions. Second operand has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:53,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:58:53,740 INFO L93 Difference]: Finished difference Result 566 states and 857 transitions. [2021-10-21 19:58:53,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:58:53,741 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2021-10-21 19:58:53,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:58:53,743 INFO L225 Difference]: With dead ends: 566 [2021-10-21 19:58:53,743 INFO L226 Difference]: Without dead ends: 323 [2021-10-21 19:58:53,744 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:58:53,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2021-10-21 19:58:53,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 264. [2021-10-21 19:58:53,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 1.5133079847908746) internal successors, (398), 263 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:53,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 398 transitions. [2021-10-21 19:58:53,752 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 398 transitions. Word has length 101 [2021-10-21 19:58:53,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:58:53,753 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 398 transitions. [2021-10-21 19:58:53,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:53,753 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 398 transitions. [2021-10-21 19:58:53,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-10-21 19:58:53,754 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:58:53,754 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-10-21 19:58:53,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-10-21 19:58:53,755 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:58:53,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:58:53,755 INFO L82 PathProgramCache]: Analyzing trace with hash -617576360, now seen corresponding path program 1 times [2021-10-21 19:58:53,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:58:53,756 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535993575] [2021-10-21 19:58:53,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:58:53,756 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:58:53,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:58:53,817 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-21 19:58:53,817 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:58:53,818 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535993575] [2021-10-21 19:58:53,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535993575] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:58:53,818 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:58:53,818 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:58:53,818 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431774418] [2021-10-21 19:58:53,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:58:53,819 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:58:53,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:58:53,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:58:53,820 INFO L87 Difference]: Start difference. First operand 264 states and 398 transitions. Second operand has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:55,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:58:55,100 INFO L93 Difference]: Finished difference Result 529 states and 800 transitions. [2021-10-21 19:58:55,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:58:55,101 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2021-10-21 19:58:55,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:58:55,102 INFO L225 Difference]: With dead ends: 529 [2021-10-21 19:58:55,103 INFO L226 Difference]: Without dead ends: 286 [2021-10-21 19:58:55,103 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:58:55,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-10-21 19:58:55,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 264. [2021-10-21 19:58:55,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 1.5095057034220531) internal successors, (397), 263 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:55,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 397 transitions. [2021-10-21 19:58:55,112 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 397 transitions. Word has length 101 [2021-10-21 19:58:55,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:58:55,112 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 397 transitions. [2021-10-21 19:58:55,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:55,112 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 397 transitions. [2021-10-21 19:58:55,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-10-21 19:58:55,113 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:58:55,114 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 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] [2021-10-21 19:58:55,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-10-21 19:58:55,114 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:58:55,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:58:55,115 INFO L82 PathProgramCache]: Analyzing trace with hash 808757304, now seen corresponding path program 1 times [2021-10-21 19:58:55,115 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:58:55,115 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372256301] [2021-10-21 19:58:55,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:58:55,115 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:58:55,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:58:55,197 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-21 19:58:55,197 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:58:55,197 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372256301] [2021-10-21 19:58:55,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372256301] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:58:55,198 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:58:55,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:58:55,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970765585] [2021-10-21 19:58:55,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:58:55,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:58:55,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:58:55,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:58:55,199 INFO L87 Difference]: Start difference. First operand 264 states and 397 transitions. Second operand has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:56,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:58:56,730 INFO L93 Difference]: Finished difference Result 556 states and 841 transitions. [2021-10-21 19:58:56,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:58:56,730 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 102 [2021-10-21 19:58:56,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:58:56,732 INFO L225 Difference]: With dead ends: 556 [2021-10-21 19:58:56,732 INFO L226 Difference]: Without dead ends: 313 [2021-10-21 19:58:56,732 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:58:56,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2021-10-21 19:58:56,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 264. [2021-10-21 19:58:56,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 1.505703422053232) internal successors, (396), 263 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:56,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 396 transitions. [2021-10-21 19:58:56,741 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 396 transitions. Word has length 102 [2021-10-21 19:58:56,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:58:56,741 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 396 transitions. [2021-10-21 19:58:56,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:56,742 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 396 transitions. [2021-10-21 19:58:56,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-10-21 19:58:56,743 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:58:56,743 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 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] [2021-10-21 19:58:56,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-10-21 19:58:56,743 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:58:56,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:58:56,744 INFO L82 PathProgramCache]: Analyzing trace with hash 1369457082, now seen corresponding path program 1 times [2021-10-21 19:58:56,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:58:56,744 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085235935] [2021-10-21 19:58:56,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:58:56,745 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:58:56,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:58:56,800 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-21 19:58:56,800 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:58:56,800 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085235935] [2021-10-21 19:58:56,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085235935] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:58:56,801 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:58:56,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:58:56,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674583446] [2021-10-21 19:58:56,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:58:56,802 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:58:56,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:58:56,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:58:56,803 INFO L87 Difference]: Start difference. First operand 264 states and 396 transitions. Second operand has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:57,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:58:57,378 INFO L93 Difference]: Finished difference Result 519 states and 784 transitions. [2021-10-21 19:58:57,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:58:57,378 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 102 [2021-10-21 19:58:57,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:58:57,379 INFO L225 Difference]: With dead ends: 519 [2021-10-21 19:58:57,379 INFO L226 Difference]: Without dead ends: 276 [2021-10-21 19:58:57,380 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:58:57,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2021-10-21 19:58:57,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 264. [2021-10-21 19:58:57,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 1.5019011406844107) internal successors, (395), 263 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:57,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 395 transitions. [2021-10-21 19:58:57,388 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 395 transitions. Word has length 102 [2021-10-21 19:58:57,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:58:57,389 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 395 transitions. [2021-10-21 19:58:57,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:57,389 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 395 transitions. [2021-10-21 19:58:57,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-10-21 19:58:57,390 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:58:57,390 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:58:57,390 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-10-21 19:58:57,391 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:58:57,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:58:57,391 INFO L82 PathProgramCache]: Analyzing trace with hash 560705022, now seen corresponding path program 1 times [2021-10-21 19:58:57,391 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:58:57,392 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400499091] [2021-10-21 19:58:57,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:58:57,392 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:58:57,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:58:57,454 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-21 19:58:57,454 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:58:57,454 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400499091] [2021-10-21 19:58:57,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400499091] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:58:57,455 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:58:57,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:58:57,455 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697349369] [2021-10-21 19:58:57,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:58:57,456 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:58:57,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:58:57,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:58:57,456 INFO L87 Difference]: Start difference. First operand 264 states and 395 transitions. Second operand has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:58,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:58:58,924 INFO L93 Difference]: Finished difference Result 556 states and 837 transitions. [2021-10-21 19:58:58,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:58:58,924 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2021-10-21 19:58:58,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:58:58,926 INFO L225 Difference]: With dead ends: 556 [2021-10-21 19:58:58,926 INFO L226 Difference]: Without dead ends: 313 [2021-10-21 19:58:58,927 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:58:58,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2021-10-21 19:58:58,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 264. [2021-10-21 19:58:58,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 1.4980988593155893) internal successors, (394), 263 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:58,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 394 transitions. [2021-10-21 19:58:58,935 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 394 transitions. Word has length 106 [2021-10-21 19:58:58,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:58:58,936 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 394 transitions. [2021-10-21 19:58:58,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:58,936 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 394 transitions. [2021-10-21 19:58:58,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-10-21 19:58:58,937 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:58:58,937 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:58:58,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-10-21 19:58:58,938 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:58:58,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:58:58,938 INFO L82 PathProgramCache]: Analyzing trace with hash 143308416, now seen corresponding path program 1 times [2021-10-21 19:58:58,938 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:58:58,939 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482329178] [2021-10-21 19:58:58,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:58:58,939 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:58:58,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:58:59,000 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-10-21 19:58:59,001 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:58:59,001 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482329178] [2021-10-21 19:58:59,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482329178] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:58:59,001 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:58:59,002 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:58:59,002 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761509731] [2021-10-21 19:58:59,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:58:59,002 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:58:59,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:58:59,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:58:59,003 INFO L87 Difference]: Start difference. First operand 264 states and 394 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:59,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:58:59,549 INFO L93 Difference]: Finished difference Result 560 states and 844 transitions. [2021-10-21 19:58:59,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:58:59,550 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2021-10-21 19:58:59,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:58:59,551 INFO L225 Difference]: With dead ends: 560 [2021-10-21 19:58:59,551 INFO L226 Difference]: Without dead ends: 317 [2021-10-21 19:58:59,552 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:58:59,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2021-10-21 19:58:59,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 290. [2021-10-21 19:58:59,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 1.519031141868512) internal successors, (439), 289 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:59,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 439 transitions. [2021-10-21 19:58:59,561 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 439 transitions. Word has length 106 [2021-10-21 19:58:59,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:58:59,561 INFO L470 AbstractCegarLoop]: Abstraction has 290 states and 439 transitions. [2021-10-21 19:58:59,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:59,562 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 439 transitions. [2021-10-21 19:58:59,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-10-21 19:58:59,563 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:58:59,563 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 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] [2021-10-21 19:58:59,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-10-21 19:58:59,564 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:58:59,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:58:59,564 INFO L82 PathProgramCache]: Analyzing trace with hash -1319828160, now seen corresponding path program 1 times [2021-10-21 19:58:59,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:58:59,564 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784845965] [2021-10-21 19:58:59,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:58:59,565 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:58:59,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:58:59,629 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-21 19:58:59,630 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:58:59,630 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784845965] [2021-10-21 19:58:59,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784845965] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:58:59,630 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:58:59,630 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:58:59,631 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940253085] [2021-10-21 19:58:59,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:58:59,631 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:58:59,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:58:59,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:58:59,632 INFO L87 Difference]: Start difference. First operand 290 states and 439 transitions. Second operand has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:59:00,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:59:00,904 INFO L93 Difference]: Finished difference Result 608 states and 925 transitions. [2021-10-21 19:59:00,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:59:00,905 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 109 [2021-10-21 19:59:00,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:59:00,907 INFO L225 Difference]: With dead ends: 608 [2021-10-21 19:59:00,907 INFO L226 Difference]: Without dead ends: 339 [2021-10-21 19:59:00,908 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:59:00,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-10-21 19:59:00,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 290. [2021-10-21 19:59:00,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 1.5155709342560553) internal successors, (438), 289 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:59:00,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 438 transitions. [2021-10-21 19:59:00,917 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 438 transitions. Word has length 109 [2021-10-21 19:59:00,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:59:00,918 INFO L470 AbstractCegarLoop]: Abstraction has 290 states and 438 transitions. [2021-10-21 19:59:00,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:59:00,918 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 438 transitions. [2021-10-21 19:59:00,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-10-21 19:59:00,919 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:59:00,920 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:59:00,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-10-21 19:59:00,920 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:59:00,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:59:00,921 INFO L82 PathProgramCache]: Analyzing trace with hash 453149950, now seen corresponding path program 1 times [2021-10-21 19:59:00,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:59:00,921 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378054383] [2021-10-21 19:59:00,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:59:00,921 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:59:00,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:59:00,994 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 80 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-21 19:59:00,994 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:59:00,994 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378054383] [2021-10-21 19:59:00,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378054383] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:59:00,994 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:59:00,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:59:00,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291219448] [2021-10-21 19:59:00,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:59:00,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:59:00,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:59:00,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:59:00,996 INFO L87 Difference]: Start difference. First operand 290 states and 438 transitions. Second operand has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:59:03,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:59:03,023 INFO L93 Difference]: Finished difference Result 600 states and 910 transitions. [2021-10-21 19:59:03,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:59:03,024 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 0 states have call successors, (0), 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 110 [2021-10-21 19:59:03,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:59:03,025 INFO L225 Difference]: With dead ends: 600 [2021-10-21 19:59:03,025 INFO L226 Difference]: Without dead ends: 331 [2021-10-21 19:59:03,025 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:59:03,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2021-10-21 19:59:03,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 290. [2021-10-21 19:59:03,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 1.5121107266435987) internal successors, (437), 289 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:59:03,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 437 transitions. [2021-10-21 19:59:03,035 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 437 transitions. Word has length 110 [2021-10-21 19:59:03,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:59:03,035 INFO L470 AbstractCegarLoop]: Abstraction has 290 states and 437 transitions. [2021-10-21 19:59:03,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:59:03,036 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 437 transitions. [2021-10-21 19:59:03,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-10-21 19:59:03,037 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:59:03,037 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:59:03,037 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-10-21 19:59:03,037 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:59:03,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:59:03,038 INFO L82 PathProgramCache]: Analyzing trace with hash 2098601152, now seen corresponding path program 1 times [2021-10-21 19:59:03,038 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:59:03,038 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628648627] [2021-10-21 19:59:03,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:59:03,039 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:59:03,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:59:03,106 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-21 19:59:03,107 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:59:03,107 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628648627] [2021-10-21 19:59:03,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628648627] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:59:03,107 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:59:03,107 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:59:03,108 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236705814] [2021-10-21 19:59:03,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:59:03,108 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:59:03,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:59:03,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:59:03,109 INFO L87 Difference]: Start difference. First operand 290 states and 437 transitions. Second operand has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:59:04,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:59:04,675 INFO L93 Difference]: Finished difference Result 600 states and 908 transitions. [2021-10-21 19:59:04,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:59:04,676 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2021-10-21 19:59:04,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:59:04,677 INFO L225 Difference]: With dead ends: 600 [2021-10-21 19:59:04,677 INFO L226 Difference]: Without dead ends: 331 [2021-10-21 19:59:04,678 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:59:04,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2021-10-21 19:59:04,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 290. [2021-10-21 19:59:04,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 1.508650519031142) internal successors, (436), 289 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:59:04,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 436 transitions. [2021-10-21 19:59:04,706 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 436 transitions. Word has length 111 [2021-10-21 19:59:04,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:59:04,707 INFO L470 AbstractCegarLoop]: Abstraction has 290 states and 436 transitions. [2021-10-21 19:59:04,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:59:04,707 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 436 transitions. [2021-10-21 19:59:04,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-10-21 19:59:04,708 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:59:04,708 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:59:04,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2021-10-21 19:59:04,709 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:59:04,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:59:04,709 INFO L82 PathProgramCache]: Analyzing trace with hash -56284365, now seen corresponding path program 1 times [2021-10-21 19:59:04,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:59:04,710 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369734475] [2021-10-21 19:59:04,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:59:04,710 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:59:04,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:59:04,774 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-21 19:59:04,774 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:59:04,775 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369734475] [2021-10-21 19:59:04,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369734475] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:59:04,776 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:59:04,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:59:04,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196726249] [2021-10-21 19:59:04,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:59:04,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:59:04,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:59:04,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:59:04,778 INFO L87 Difference]: Start difference. First operand 290 states and 436 transitions. Second operand has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:59:07,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:59:07,066 INFO L93 Difference]: Finished difference Result 600 states and 906 transitions. [2021-10-21 19:59:07,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:59:07,067 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 112 [2021-10-21 19:59:07,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:59:07,069 INFO L225 Difference]: With dead ends: 600 [2021-10-21 19:59:07,069 INFO L226 Difference]: Without dead ends: 331 [2021-10-21 19:59:07,069 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:59:07,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2021-10-21 19:59:07,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 290. [2021-10-21 19:59:07,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 1.505190311418685) internal successors, (435), 289 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:59:07,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 435 transitions. [2021-10-21 19:59:07,080 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 435 transitions. Word has length 112 [2021-10-21 19:59:07,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:59:07,080 INFO L470 AbstractCegarLoop]: Abstraction has 290 states and 435 transitions. [2021-10-21 19:59:07,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:59:07,081 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 435 transitions. [2021-10-21 19:59:07,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-10-21 19:59:07,082 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:59:07,082 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:59:07,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2021-10-21 19:59:07,083 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:59:07,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:59:07,083 INFO L82 PathProgramCache]: Analyzing trace with hash -794568610, now seen corresponding path program 1 times [2021-10-21 19:59:07,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:59:07,084 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207939749] [2021-10-21 19:59:07,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:59:07,084 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:59:07,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:59:07,148 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 82 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-21 19:59:07,148 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:59:07,148 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207939749] [2021-10-21 19:59:07,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207939749] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:59:07,148 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:59:07,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:59:07,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402758804] [2021-10-21 19:59:07,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:59:07,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:59:07,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:59:07,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:59:07,150 INFO L87 Difference]: Start difference. First operand 290 states and 435 transitions. Second operand has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:59:08,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:59:08,212 INFO L93 Difference]: Finished difference Result 598 states and 902 transitions. [2021-10-21 19:59:08,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:59:08,213 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 112 [2021-10-21 19:59:08,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:59:08,214 INFO L225 Difference]: With dead ends: 598 [2021-10-21 19:59:08,214 INFO L226 Difference]: Without dead ends: 329 [2021-10-21 19:59:08,215 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:59:08,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2021-10-21 19:59:08,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 290. [2021-10-21 19:59:08,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 1.5017301038062283) internal successors, (434), 289 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:59:08,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 434 transitions. [2021-10-21 19:59:08,224 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 434 transitions. Word has length 112 [2021-10-21 19:59:08,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:59:08,225 INFO L470 AbstractCegarLoop]: Abstraction has 290 states and 434 transitions. [2021-10-21 19:59:08,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:59:08,225 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 434 transitions. [2021-10-21 19:59:08,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-10-21 19:59:08,226 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:59:08,226 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:59:08,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2021-10-21 19:59:08,227 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:59:08,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:59:08,227 INFO L82 PathProgramCache]: Analyzing trace with hash 762321429, now seen corresponding path program 1 times [2021-10-21 19:59:08,227 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:59:08,228 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935741523] [2021-10-21 19:59:08,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:59:08,228 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:59:08,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:59:08,307 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 78 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-21 19:59:08,307 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:59:08,307 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935741523] [2021-10-21 19:59:08,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935741523] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:59:08,308 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:59:08,308 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:59:08,308 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854136634] [2021-10-21 19:59:08,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:59:08,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:59:08,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:59:08,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:59:08,309 INFO L87 Difference]: Start difference. First operand 290 states and 434 transitions. Second operand has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:59:09,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:59:09,285 INFO L93 Difference]: Finished difference Result 596 states and 897 transitions. [2021-10-21 19:59:09,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:59:09,285 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 0 states have call successors, (0), 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 113 [2021-10-21 19:59:09,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:59:09,287 INFO L225 Difference]: With dead ends: 596 [2021-10-21 19:59:09,287 INFO L226 Difference]: Without dead ends: 327 [2021-10-21 19:59:09,287 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:59:09,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2021-10-21 19:59:09,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 290. [2021-10-21 19:59:09,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 1.4982698961937717) internal successors, (433), 289 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:59:09,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 433 transitions. [2021-10-21 19:59:09,294 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 433 transitions. Word has length 113 [2021-10-21 19:59:09,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:59:09,295 INFO L470 AbstractCegarLoop]: Abstraction has 290 states and 433 transitions. [2021-10-21 19:59:09,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:59:09,295 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 433 transitions. [2021-10-21 19:59:09,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-10-21 19:59:09,296 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:59:09,296 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:59:09,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2021-10-21 19:59:09,297 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:59:09,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:59:09,297 INFO L82 PathProgramCache]: Analyzing trace with hash 1246725502, now seen corresponding path program 1 times [2021-10-21 19:59:09,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:59:09,297 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678282886] [2021-10-21 19:59:09,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:59:09,298 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:59:09,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:59:09,358 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-21 19:59:09,359 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:59:09,359 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678282886] [2021-10-21 19:59:09,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678282886] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:59:09,359 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:59:09,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:59:09,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304658473] [2021-10-21 19:59:09,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:59:09,360 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:59:09,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:59:09,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:59:09,361 INFO L87 Difference]: Start difference. First operand 290 states and 433 transitions. Second operand has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:59:11,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:59:11,625 INFO L93 Difference]: Finished difference Result 593 states and 891 transitions. [2021-10-21 19:59:11,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:59:11,626 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 0 states have call successors, (0), 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 113 [2021-10-21 19:59:11,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:59:11,627 INFO L225 Difference]: With dead ends: 593 [2021-10-21 19:59:11,627 INFO L226 Difference]: Without dead ends: 324 [2021-10-21 19:59:11,627 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:59:11,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2021-10-21 19:59:11,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 290. [2021-10-21 19:59:11,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 1.494809688581315) internal successors, (432), 289 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:59:11,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 432 transitions. [2021-10-21 19:59:11,640 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 432 transitions. Word has length 113 [2021-10-21 19:59:11,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:59:11,641 INFO L470 AbstractCegarLoop]: Abstraction has 290 states and 432 transitions. [2021-10-21 19:59:11,641 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:59:11,641 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 432 transitions. [2021-10-21 19:59:11,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-10-21 19:59:11,643 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:59:11,643 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:59:11,644 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2021-10-21 19:59:11,644 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:59:11,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:59:11,644 INFO L82 PathProgramCache]: Analyzing trace with hash -1321120810, now seen corresponding path program 1 times [2021-10-21 19:59:11,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:59:11,645 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892486180] [2021-10-21 19:59:11,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:59:11,645 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:59:11,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:59:11,755 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 84 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-21 19:59:11,756 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:59:11,756 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892486180] [2021-10-21 19:59:11,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892486180] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:59:11,756 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:59:11,756 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:59:11,757 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051555542] [2021-10-21 19:59:11,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:59:11,757 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:59:11,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:59:11,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:59:11,758 INFO L87 Difference]: Start difference. First operand 290 states and 432 transitions. Second operand has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:59:13,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:59:13,074 INFO L93 Difference]: Finished difference Result 593 states and 889 transitions. [2021-10-21 19:59:13,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:59:13,075 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 116 [2021-10-21 19:59:13,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:59:13,076 INFO L225 Difference]: With dead ends: 593 [2021-10-21 19:59:13,076 INFO L226 Difference]: Without dead ends: 324 [2021-10-21 19:59:13,077 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:59:13,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2021-10-21 19:59:13,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 290. [2021-10-21 19:59:13,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 1.491349480968858) internal successors, (431), 289 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:59:13,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 431 transitions. [2021-10-21 19:59:13,085 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 431 transitions. Word has length 116 [2021-10-21 19:59:13,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:59:13,085 INFO L470 AbstractCegarLoop]: Abstraction has 290 states and 431 transitions. [2021-10-21 19:59:13,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:59:13,086 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 431 transitions. [2021-10-21 19:59:13,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-10-21 19:59:13,087 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:59:13,087 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:59:13,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2021-10-21 19:59:13,088 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:59:13,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:59:13,088 INFO L82 PathProgramCache]: Analyzing trace with hash 684049011, now seen corresponding path program 1 times [2021-10-21 19:59:13,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:59:13,088 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304346944] [2021-10-21 19:59:13,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:59:13,089 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:59:13,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:59:13,152 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 85 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-21 19:59:13,152 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:59:13,153 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304346944] [2021-10-21 19:59:13,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304346944] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:59:13,153 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:59:13,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:59:13,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156280986] [2021-10-21 19:59:13,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:59:13,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:59:13,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:59:13,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:59:13,155 INFO L87 Difference]: Start difference. First operand 290 states and 431 transitions. Second operand has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:59:15,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:59:15,395 INFO L93 Difference]: Finished difference Result 587 states and 878 transitions. [2021-10-21 19:59:15,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:59:15,396 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 117 [2021-10-21 19:59:15,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:59:15,398 INFO L225 Difference]: With dead ends: 587 [2021-10-21 19:59:15,398 INFO L226 Difference]: Without dead ends: 318 [2021-10-21 19:59:15,398 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:59:15,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2021-10-21 19:59:15,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 290. [2021-10-21 19:59:15,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 1.4878892733564013) internal successors, (430), 289 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:59:15,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 430 transitions. [2021-10-21 19:59:15,409 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 430 transitions. Word has length 117 [2021-10-21 19:59:15,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:59:15,409 INFO L470 AbstractCegarLoop]: Abstraction has 290 states and 430 transitions. [2021-10-21 19:59:15,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:59:15,410 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 430 transitions. [2021-10-21 19:59:15,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-10-21 19:59:15,411 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:59:15,411 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:59:15,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2021-10-21 19:59:15,412 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:59:15,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:59:15,412 INFO L82 PathProgramCache]: Analyzing trace with hash 785025711, now seen corresponding path program 1 times [2021-10-21 19:59:15,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:59:15,412 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605265259] [2021-10-21 19:59:15,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:59:15,413 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:59:15,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:59:15,498 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 86 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-21 19:59:15,499 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:59:15,499 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605265259] [2021-10-21 19:59:15,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605265259] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:59:15,499 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:59:15,499 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:59:15,499 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433244381] [2021-10-21 19:59:15,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:59:15,500 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:59:15,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:59:15,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:59:15,501 INFO L87 Difference]: Start difference. First operand 290 states and 430 transitions. Second operand has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:59:16,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:59:16,692 INFO L93 Difference]: Finished difference Result 587 states and 876 transitions. [2021-10-21 19:59:16,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:59:16,693 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 117 [2021-10-21 19:59:16,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:59:16,694 INFO L225 Difference]: With dead ends: 587 [2021-10-21 19:59:16,694 INFO L226 Difference]: Without dead ends: 318 [2021-10-21 19:59:16,695 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:59:16,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2021-10-21 19:59:16,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 290. [2021-10-21 19:59:16,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 1.4844290657439447) internal successors, (429), 289 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:59:16,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 429 transitions. [2021-10-21 19:59:16,704 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 429 transitions. Word has length 117 [2021-10-21 19:59:16,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:59:16,705 INFO L470 AbstractCegarLoop]: Abstraction has 290 states and 429 transitions. [2021-10-21 19:59:16,705 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:59:16,705 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 429 transitions. [2021-10-21 19:59:16,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-10-21 19:59:16,706 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:59:16,706 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:59:16,706 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2021-10-21 19:59:16,707 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:59:16,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:59:16,707 INFO L82 PathProgramCache]: Analyzing trace with hash -256237486, now seen corresponding path program 1 times [2021-10-21 19:59:16,707 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:59:16,708 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130713163] [2021-10-21 19:59:16,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:59:16,708 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:59:16,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:59:16,772 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 87 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-21 19:59:16,772 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:59:16,773 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130713163] [2021-10-21 19:59:16,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130713163] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:59:16,773 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:59:16,773 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:59:16,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044213634] [2021-10-21 19:59:16,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:59:16,774 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:59:16,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:59:16,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:59:16,775 INFO L87 Difference]: Start difference. First operand 290 states and 429 transitions. Second operand has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:59:17,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:59:17,812 INFO L93 Difference]: Finished difference Result 584 states and 870 transitions. [2021-10-21 19:59:17,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:59:17,813 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 118 [2021-10-21 19:59:17,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:59:17,815 INFO L225 Difference]: With dead ends: 584 [2021-10-21 19:59:17,815 INFO L226 Difference]: Without dead ends: 315 [2021-10-21 19:59:17,816 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:59:17,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-10-21 19:59:17,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 290. [2021-10-21 19:59:17,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 1.480968858131488) internal successors, (428), 289 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:59:17,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 428 transitions. [2021-10-21 19:59:17,830 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 428 transitions. Word has length 118 [2021-10-21 19:59:17,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:59:17,830 INFO L470 AbstractCegarLoop]: Abstraction has 290 states and 428 transitions. [2021-10-21 19:59:17,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:59:17,831 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 428 transitions. [2021-10-21 19:59:17,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-10-21 19:59:17,832 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:59:17,832 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:59:17,832 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2021-10-21 19:59:17,833 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:59:17,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:59:17,833 INFO L82 PathProgramCache]: Analyzing trace with hash -674265657, now seen corresponding path program 1 times [2021-10-21 19:59:17,833 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:59:17,833 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810026839] [2021-10-21 19:59:17,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:59:17,834 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:59:17,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:59:17,900 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-21 19:59:17,900 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:59:17,901 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810026839] [2021-10-21 19:59:17,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810026839] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:59:17,901 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:59:17,901 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:59:17,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658498854] [2021-10-21 19:59:17,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:59:17,902 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:59:17,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:59:17,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:59:17,903 INFO L87 Difference]: Start difference. First operand 290 states and 428 transitions. Second operand has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:59:18,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:59:18,795 INFO L93 Difference]: Finished difference Result 584 states and 868 transitions. [2021-10-21 19:59:18,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:59:18,796 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 0 states have call successors, (0), 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 119 [2021-10-21 19:59:18,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:59:18,797 INFO L225 Difference]: With dead ends: 584 [2021-10-21 19:59:18,797 INFO L226 Difference]: Without dead ends: 315 [2021-10-21 19:59:18,798 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:59:18,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-10-21 19:59:18,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 290. [2021-10-21 19:59:18,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 1.4775086505190311) internal successors, (427), 289 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:59:18,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 427 transitions. [2021-10-21 19:59:18,805 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 427 transitions. Word has length 119 [2021-10-21 19:59:18,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:59:18,806 INFO L470 AbstractCegarLoop]: Abstraction has 290 states and 427 transitions. [2021-10-21 19:59:18,806 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:59:18,806 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 427 transitions. [2021-10-21 19:59:18,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-10-21 19:59:18,807 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:59:18,807 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 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] [2021-10-21 19:59:18,808 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2021-10-21 19:59:18,808 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:59:18,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:59:18,808 INFO L82 PathProgramCache]: Analyzing trace with hash -1746294896, now seen corresponding path program 1 times [2021-10-21 19:59:18,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:59:18,809 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489213977] [2021-10-21 19:59:18,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:59:18,809 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:59:18,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:59:18,875 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-10-21 19:59:18,875 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:59:18,875 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489213977] [2021-10-21 19:59:18,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489213977] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:59:18,876 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:59:18,876 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:59:18,876 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777788486] [2021-10-21 19:59:18,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:59:18,876 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:59:18,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:59:18,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:59:18,877 INFO L87 Difference]: Start difference. First operand 290 states and 427 transitions. Second operand has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:59:19,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:59:19,587 INFO L93 Difference]: Finished difference Result 631 states and 941 transitions. [2021-10-21 19:59:19,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:59:19,591 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 119 [2021-10-21 19:59:19,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:59:19,593 INFO L225 Difference]: With dead ends: 631 [2021-10-21 19:59:19,594 INFO L226 Difference]: Without dead ends: 362 [2021-10-21 19:59:19,594 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:59:19,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2021-10-21 19:59:19,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 322. [2021-10-21 19:59:19,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 321 states have (on average 1.5077881619937694) internal successors, (484), 321 states have internal predecessors, (484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:59:19,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 484 transitions. [2021-10-21 19:59:19,606 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 484 transitions. Word has length 119 [2021-10-21 19:59:19,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:59:19,606 INFO L470 AbstractCegarLoop]: Abstraction has 322 states and 484 transitions. [2021-10-21 19:59:19,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:59:19,607 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 484 transitions. [2021-10-21 19:59:19,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-10-21 19:59:19,608 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:59:19,608 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:59:19,608 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2021-10-21 19:59:19,608 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:59:19,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:59:19,609 INFO L82 PathProgramCache]: Analyzing trace with hash 622163786, now seen corresponding path program 1 times [2021-10-21 19:59:19,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:59:19,609 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028922440] [2021-10-21 19:59:19,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:59:19,610 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:59:19,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:59:19,684 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-21 19:59:19,684 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:59:19,684 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028922440] [2021-10-21 19:59:19,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028922440] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:59:19,685 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:59:19,685 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:59:19,685 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505831957] [2021-10-21 19:59:19,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:59:19,686 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:59:19,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:59:19,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:59:19,686 INFO L87 Difference]: Start difference. First operand 322 states and 484 transitions. Second operand has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:59:20,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:59:20,715 INFO L93 Difference]: Finished difference Result 645 states and 976 transitions. [2021-10-21 19:59:20,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:59:20,716 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-10-21 19:59:20,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:59:20,717 INFO L225 Difference]: With dead ends: 645 [2021-10-21 19:59:20,717 INFO L226 Difference]: Without dead ends: 344 [2021-10-21 19:59:20,718 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:59:20,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2021-10-21 19:59:20,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 322. [2021-10-21 19:59:20,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 321 states have (on average 1.5046728971962617) internal successors, (483), 321 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:59:20,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 483 transitions. [2021-10-21 19:59:20,727 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 483 transitions. Word has length 120 [2021-10-21 19:59:20,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:59:20,728 INFO L470 AbstractCegarLoop]: Abstraction has 322 states and 483 transitions. [2021-10-21 19:59:20,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:59:20,728 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 483 transitions. [2021-10-21 19:59:20,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-10-21 19:59:20,729 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:59:20,729 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 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] [2021-10-21 19:59:20,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2021-10-21 19:59:20,730 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:59:20,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:59:20,730 INFO L82 PathProgramCache]: Analyzing trace with hash -519575916, now seen corresponding path program 1 times [2021-10-21 19:59:20,730 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:59:20,731 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412408480] [2021-10-21 19:59:20,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:59:20,731 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:59:20,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:59:20,792 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-10-21 19:59:20,792 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:59:20,792 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412408480] [2021-10-21 19:59:20,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412408480] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:59:20,792 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:59:20,793 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:59:20,793 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459558943] [2021-10-21 19:59:20,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:59:20,793 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:59:20,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:59:20,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:59:20,794 INFO L87 Difference]: Start difference. First operand 322 states and 483 transitions. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:59:21,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:59:21,915 INFO L93 Difference]: Finished difference Result 733 states and 1113 transitions. [2021-10-21 19:59:21,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:59:21,916 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-10-21 19:59:21,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:59:21,918 INFO L225 Difference]: With dead ends: 733 [2021-10-21 19:59:21,918 INFO L226 Difference]: Without dead ends: 432 [2021-10-21 19:59:21,918 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:59:21,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2021-10-21 19:59:21,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 361. [2021-10-21 19:59:21,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 360 states have (on average 1.538888888888889) internal successors, (554), 360 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:59:21,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 554 transitions. [2021-10-21 19:59:21,927 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 554 transitions. Word has length 120 [2021-10-21 19:59:21,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:59:21,928 INFO L470 AbstractCegarLoop]: Abstraction has 361 states and 554 transitions. [2021-10-21 19:59:21,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:59:21,928 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 554 transitions. [2021-10-21 19:59:21,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-10-21 19:59:21,929 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:59:21,929 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 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] [2021-10-21 19:59:21,929 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2021-10-21 19:59:21,930 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:59:21,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:59:21,930 INFO L82 PathProgramCache]: Analyzing trace with hash -1289248532, now seen corresponding path program 1 times [2021-10-21 19:59:21,930 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:59:21,930 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127720170] [2021-10-21 19:59:21,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:59:21,931 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:59:21,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:59:22,007 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 72 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-10-21 19:59:22,008 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:59:22,008 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127720170] [2021-10-21 19:59:22,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127720170] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:59:22,008 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:59:22,008 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:59:22,009 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858671339] [2021-10-21 19:59:22,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:59:22,009 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:59:22,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:59:22,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:59:22,010 INFO L87 Difference]: Start difference. First operand 361 states and 554 transitions. Second operand has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:59:23,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:59:23,899 INFO L93 Difference]: Finished difference Result 728 states and 1118 transitions. [2021-10-21 19:59:23,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:59:23,900 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 121 [2021-10-21 19:59:23,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:59:23,902 INFO L225 Difference]: With dead ends: 728 [2021-10-21 19:59:23,902 INFO L226 Difference]: Without dead ends: 388 [2021-10-21 19:59:23,903 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:59:23,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2021-10-21 19:59:23,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 361. [2021-10-21 19:59:23,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 360 states have (on average 1.5361111111111112) internal successors, (553), 360 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:59:23,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 553 transitions. [2021-10-21 19:59:23,916 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 553 transitions. Word has length 121 [2021-10-21 19:59:23,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:59:23,916 INFO L470 AbstractCegarLoop]: Abstraction has 361 states and 553 transitions. [2021-10-21 19:59:23,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:59:23,916 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 553 transitions. [2021-10-21 19:59:23,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-10-21 19:59:23,917 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:59:23,918 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 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] [2021-10-21 19:59:23,918 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2021-10-21 19:59:23,918 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:59:23,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:59:23,918 INFO L82 PathProgramCache]: Analyzing trace with hash -2109000541, now seen corresponding path program 1 times [2021-10-21 19:59:23,919 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:59:23,919 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226006755] [2021-10-21 19:59:23,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:59:23,919 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:59:23,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:59:23,979 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-10-21 19:59:23,979 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:59:23,979 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226006755] [2021-10-21 19:59:23,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226006755] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:59:23,979 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:59:23,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:59:23,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212755833] [2021-10-21 19:59:23,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:59:23,981 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:59:23,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:59:23,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:59:23,981 INFO L87 Difference]: Start difference. First operand 361 states and 553 transitions. Second operand has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:59:25,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:59:25,032 INFO L93 Difference]: Finished difference Result 764 states and 1170 transitions. [2021-10-21 19:59:25,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:59:25,033 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 121 [2021-10-21 19:59:25,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:59:25,035 INFO L225 Difference]: With dead ends: 764 [2021-10-21 19:59:25,035 INFO L226 Difference]: Without dead ends: 424 [2021-10-21 19:59:25,035 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:59:25,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2021-10-21 19:59:25,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 360. [2021-10-21 19:59:25,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 359 states have (on average 1.5376044568245126) internal successors, (552), 359 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:59:25,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 552 transitions. [2021-10-21 19:59:25,045 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 552 transitions. Word has length 121 [2021-10-21 19:59:25,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:59:25,046 INFO L470 AbstractCegarLoop]: Abstraction has 360 states and 552 transitions. [2021-10-21 19:59:25,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:59:25,047 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 552 transitions. [2021-10-21 19:59:25,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-10-21 19:59:25,048 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:59:25,049 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 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] [2021-10-21 19:59:25,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2021-10-21 19:59:25,049 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:59:25,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:59:25,050 INFO L82 PathProgramCache]: Analyzing trace with hash 916580592, now seen corresponding path program 1 times [2021-10-21 19:59:25,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:59:25,050 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758811996] [2021-10-21 19:59:25,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:59:25,051 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:59:25,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:59:25,137 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 76 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-10-21 19:59:25,137 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:59:25,137 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758811996] [2021-10-21 19:59:25,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758811996] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:59:25,138 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:59:25,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:59:25,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141686981] [2021-10-21 19:59:25,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:59:25,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:59:25,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:59:25,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:59:25,139 INFO L87 Difference]: Start difference. First operand 360 states and 552 transitions. Second operand has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:59:26,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:59:26,293 INFO L93 Difference]: Finished difference Result 726 states and 1114 transitions. [2021-10-21 19:59:26,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:59:26,293 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 122 [2021-10-21 19:59:26,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:59:26,295 INFO L225 Difference]: With dead ends: 726 [2021-10-21 19:59:26,295 INFO L226 Difference]: Without dead ends: 387 [2021-10-21 19:59:26,295 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:59:26,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2021-10-21 19:59:26,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 360. [2021-10-21 19:59:26,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 359 states have (on average 1.5348189415041782) internal successors, (551), 359 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:59:26,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 551 transitions. [2021-10-21 19:59:26,304 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 551 transitions. Word has length 122 [2021-10-21 19:59:26,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:59:26,304 INFO L470 AbstractCegarLoop]: Abstraction has 360 states and 551 transitions. [2021-10-21 19:59:26,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:59:26,304 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 551 transitions. [2021-10-21 19:59:26,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-10-21 19:59:26,305 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:59:26,306 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 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] [2021-10-21 19:59:26,306 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2021-10-21 19:59:26,306 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:59:26,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:59:26,307 INFO L82 PathProgramCache]: Analyzing trace with hash 1130744519, now seen corresponding path program 1 times [2021-10-21 19:59:26,307 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:59:26,307 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183549376] [2021-10-21 19:59:26,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:59:26,307 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:59:26,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:59:26,368 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 80 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-10-21 19:59:26,368 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:59:26,368 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183549376] [2021-10-21 19:59:26,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183549376] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:59:26,369 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:59:26,369 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:59:26,369 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844615395] [2021-10-21 19:59:26,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:59:26,370 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:59:26,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:59:26,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:59:26,370 INFO L87 Difference]: Start difference. First operand 360 states and 551 transitions. Second operand has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:59:27,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:59:27,602 INFO L93 Difference]: Finished difference Result 726 states and 1112 transitions. [2021-10-21 19:59:27,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:59:27,603 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 123 [2021-10-21 19:59:27,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:59:27,605 INFO L225 Difference]: With dead ends: 726 [2021-10-21 19:59:27,605 INFO L226 Difference]: Without dead ends: 387 [2021-10-21 19:59:27,605 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:59:27,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2021-10-21 19:59:27,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 360. [2021-10-21 19:59:27,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 359 states have (on average 1.532033426183844) internal successors, (550), 359 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:59:27,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 550 transitions. [2021-10-21 19:59:27,614 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 550 transitions. Word has length 123 [2021-10-21 19:59:27,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:59:27,614 INFO L470 AbstractCegarLoop]: Abstraction has 360 states and 550 transitions. [2021-10-21 19:59:27,615 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:59:27,615 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 550 transitions. [2021-10-21 19:59:27,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-10-21 19:59:27,615 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:59:27,616 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 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] [2021-10-21 19:59:27,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2021-10-21 19:59:27,616 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:59:27,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:59:27,616 INFO L82 PathProgramCache]: Analyzing trace with hash -267170517, now seen corresponding path program 1 times [2021-10-21 19:59:27,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:59:27,616 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942434287] [2021-10-21 19:59:27,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:59:27,617 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:59:27,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:59:27,704 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 84 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-10-21 19:59:27,704 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:59:27,704 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942434287] [2021-10-21 19:59:27,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942434287] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:59:27,704 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:59:27,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:59:27,705 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222058852] [2021-10-21 19:59:27,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:59:27,705 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:59:27,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:59:27,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:59:27,706 INFO L87 Difference]: Start difference. First operand 360 states and 550 transitions. Second operand has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:59:28,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:59:28,369 INFO L93 Difference]: Finished difference Result 716 states and 1098 transitions. [2021-10-21 19:59:28,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:59:28,370 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 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 124 [2021-10-21 19:59:28,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:59:28,372 INFO L225 Difference]: With dead ends: 716 [2021-10-21 19:59:28,372 INFO L226 Difference]: Without dead ends: 377 [2021-10-21 19:59:28,372 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:59:28,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2021-10-21 19:59:28,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 360. [2021-10-21 19:59:28,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 359 states have (on average 1.5292479108635098) internal successors, (549), 359 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:59:28,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 549 transitions. [2021-10-21 19:59:28,385 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 549 transitions. Word has length 124 [2021-10-21 19:59:28,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:59:28,385 INFO L470 AbstractCegarLoop]: Abstraction has 360 states and 549 transitions. [2021-10-21 19:59:28,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:59:28,386 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 549 transitions. [2021-10-21 19:59:28,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-10-21 19:59:28,387 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:59:28,387 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:59:28,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2021-10-21 19:59:28,387 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:59:28,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:59:28,388 INFO L82 PathProgramCache]: Analyzing trace with hash -1301596762, now seen corresponding path program 1 times [2021-10-21 19:59:28,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:59:28,388 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336530390] [2021-10-21 19:59:28,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:59:28,389 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:59:28,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:59:28,442 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-21 19:59:28,443 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:59:28,443 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336530390] [2021-10-21 19:59:28,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336530390] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:59:28,443 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:59:28,443 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-21 19:59:28,443 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067185236] [2021-10-21 19:59:28,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-21 19:59:28,444 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:59:28,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-21 19:59:28,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 19:59:28,445 INFO L87 Difference]: Start difference. First operand 360 states and 549 transitions. Second operand has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:59:28,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:59:28,556 INFO L93 Difference]: Finished difference Result 1033 states and 1591 transitions. [2021-10-21 19:59:28,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-21 19:59:28,556 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-10-21 19:59:28,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:59:28,560 INFO L225 Difference]: With dead ends: 1033 [2021-10-21 19:59:28,560 INFO L226 Difference]: Without dead ends: 694 [2021-10-21 19:59:28,561 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 19:59:28,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 694 states. [2021-10-21 19:59:28,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 694 to 692. [2021-10-21 19:59:28,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 692 states, 691 states have (on average 1.5166425470332852) internal successors, (1048), 691 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:59:28,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 692 states to 692 states and 1048 transitions. [2021-10-21 19:59:28,584 INFO L78 Accepts]: Start accepts. Automaton has 692 states and 1048 transitions. Word has length 125 [2021-10-21 19:59:28,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:59:28,584 INFO L470 AbstractCegarLoop]: Abstraction has 692 states and 1048 transitions. [2021-10-21 19:59:28,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:59:28,585 INFO L276 IsEmpty]: Start isEmpty. Operand 692 states and 1048 transitions. [2021-10-21 19:59:28,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-10-21 19:59:28,586 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:59:28,587 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:59:28,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2021-10-21 19:59:28,587 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:59:28,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:59:28,588 INFO L82 PathProgramCache]: Analyzing trace with hash 1114239588, now seen corresponding path program 1 times [2021-10-21 19:59:28,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:59:28,588 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078197102] [2021-10-21 19:59:28,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:59:28,589 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:59:28,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:59:28,630 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-10-21 19:59:28,630 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:59:28,630 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078197102] [2021-10-21 19:59:28,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078197102] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:59:28,630 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:59:28,631 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-21 19:59:28,631 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190621471] [2021-10-21 19:59:28,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-21 19:59:28,631 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:59:28,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-21 19:59:28,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 19:59:28,632 INFO L87 Difference]: Start difference. First operand 692 states and 1048 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:59:28,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:59:28,699 INFO L93 Difference]: Finished difference Result 1390 states and 2108 transitions. [2021-10-21 19:59:28,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-21 19:59:28,699 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-10-21 19:59:28,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:59:28,703 INFO L225 Difference]: With dead ends: 1390 [2021-10-21 19:59:28,703 INFO L226 Difference]: Without dead ends: 719 [2021-10-21 19:59:28,704 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 19:59:28,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 719 states. [2021-10-21 19:59:28,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 719 to 719. [2021-10-21 19:59:28,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 719 states, 718 states have (on average 1.5083565459610029) internal successors, (1083), 718 states have internal predecessors, (1083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:59:28,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 719 states to 719 states and 1083 transitions. [2021-10-21 19:59:28,730 INFO L78 Accepts]: Start accepts. Automaton has 719 states and 1083 transitions. Word has length 125 [2021-10-21 19:59:28,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:59:28,730 INFO L470 AbstractCegarLoop]: Abstraction has 719 states and 1083 transitions. [2021-10-21 19:59:28,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:59:28,730 INFO L276 IsEmpty]: Start isEmpty. Operand 719 states and 1083 transitions. [2021-10-21 19:59:28,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-10-21 19:59:28,732 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:59:28,732 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:59:28,732 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2021-10-21 19:59:28,733 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:59:28,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:59:28,733 INFO L82 PathProgramCache]: Analyzing trace with hash -1791433694, now seen corresponding path program 1 times [2021-10-21 19:59:28,733 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:59:28,733 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026163234] [2021-10-21 19:59:28,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:59:28,734 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:59:28,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:59:28,776 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-10-21 19:59:28,777 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:59:28,777 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026163234] [2021-10-21 19:59:28,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026163234] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:59:28,777 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:59:28,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-21 19:59:28,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831077073] [2021-10-21 19:59:28,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-21 19:59:28,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:59:28,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-21 19:59:28,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 19:59:28,779 INFO L87 Difference]: Start difference. First operand 719 states and 1083 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:59:28,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:59:28,834 INFO L93 Difference]: Finished difference Result 1419 states and 2144 transitions. [2021-10-21 19:59:28,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-21 19:59:28,835 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-10-21 19:59:28,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:59:28,839 INFO L225 Difference]: With dead ends: 1419 [2021-10-21 19:59:28,839 INFO L226 Difference]: Without dead ends: 721 [2021-10-21 19:59:28,840 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 19:59:28,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 721 states. [2021-10-21 19:59:28,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 721 to 721. [2021-10-21 19:59:28,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 721 states, 720 states have (on average 1.5069444444444444) internal successors, (1085), 720 states have internal predecessors, (1085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:59:28,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 721 states to 721 states and 1085 transitions. [2021-10-21 19:59:28,868 INFO L78 Accepts]: Start accepts. Automaton has 721 states and 1085 transitions. Word has length 125 [2021-10-21 19:59:28,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:59:28,868 INFO L470 AbstractCegarLoop]: Abstraction has 721 states and 1085 transitions. [2021-10-21 19:59:28,870 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:59:28,870 INFO L276 IsEmpty]: Start isEmpty. Operand 721 states and 1085 transitions. [2021-10-21 19:59:28,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-10-21 19:59:28,872 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:59:28,872 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:59:28,872 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2021-10-21 19:59:28,873 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:59:28,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:59:28,873 INFO L82 PathProgramCache]: Analyzing trace with hash -1364757409, now seen corresponding path program 1 times [2021-10-21 19:59:28,873 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:59:28,874 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737461273] [2021-10-21 19:59:28,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:59:28,874 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:59:28,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:59:28,955 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-10-21 19:59:28,955 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:59:28,956 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737461273] [2021-10-21 19:59:28,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737461273] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:59:28,956 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:59:28,956 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:59:28,956 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579944779] [2021-10-21 19:59:28,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:59:28,957 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:59:28,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:59:28,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:59:28,958 INFO L87 Difference]: Start difference. First operand 721 states and 1085 transitions. Second operand has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:59:30,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:59:30,418 INFO L93 Difference]: Finished difference Result 1635 states and 2470 transitions. [2021-10-21 19:59:30,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:59:30,419 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 127 [2021-10-21 19:59:30,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:59:30,424 INFO L225 Difference]: With dead ends: 1635 [2021-10-21 19:59:30,425 INFO L226 Difference]: Without dead ends: 937 [2021-10-21 19:59:30,426 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:59:30,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 937 states. [2021-10-21 19:59:30,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 937 to 799. [2021-10-21 19:59:30,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 799 states, 798 states have (on average 1.537593984962406) internal successors, (1227), 798 states have internal predecessors, (1227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:59:30,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 799 states to 799 states and 1227 transitions. [2021-10-21 19:59:30,457 INFO L78 Accepts]: Start accepts. Automaton has 799 states and 1227 transitions. Word has length 127 [2021-10-21 19:59:30,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:59:30,458 INFO L470 AbstractCegarLoop]: Abstraction has 799 states and 1227 transitions. [2021-10-21 19:59:30,458 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:59:30,458 INFO L276 IsEmpty]: Start isEmpty. Operand 799 states and 1227 transitions. [2021-10-21 19:59:30,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-10-21 19:59:30,460 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:59:30,460 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:59:30,461 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2021-10-21 19:59:30,461 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:59:30,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:59:30,462 INFO L82 PathProgramCache]: Analyzing trace with hash 1755144248, now seen corresponding path program 1 times [2021-10-21 19:59:30,462 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:59:30,462 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626265688] [2021-10-21 19:59:30,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:59:30,464 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:59:30,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:59:30,530 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-10-21 19:59:30,530 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:59:30,531 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626265688] [2021-10-21 19:59:30,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626265688] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:59:30,532 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:59:30,532 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:59:30,532 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668384731] [2021-10-21 19:59:30,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:59:30,533 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:59:30,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:59:30,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:59:30,534 INFO L87 Difference]: Start difference. First operand 799 states and 1227 transitions. Second operand has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:59:31,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:59:31,261 INFO L93 Difference]: Finished difference Result 1701 states and 2595 transitions. [2021-10-21 19:59:31,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:59:31,264 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 128 [2021-10-21 19:59:31,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:59:31,268 INFO L225 Difference]: With dead ends: 1701 [2021-10-21 19:59:31,268 INFO L226 Difference]: Without dead ends: 925 [2021-10-21 19:59:31,269 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:59:31,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 925 states. [2021-10-21 19:59:31,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 925 to 721. [2021-10-21 19:59:31,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 721 states, 720 states have (on average 1.5069444444444444) internal successors, (1085), 720 states have internal predecessors, (1085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:59:31,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 721 states to 721 states and 1085 transitions. [2021-10-21 19:59:31,300 INFO L78 Accepts]: Start accepts. Automaton has 721 states and 1085 transitions. Word has length 128 [2021-10-21 19:59:31,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:59:31,301 INFO L470 AbstractCegarLoop]: Abstraction has 721 states and 1085 transitions. [2021-10-21 19:59:31,301 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:59:31,301 INFO L276 IsEmpty]: Start isEmpty. Operand 721 states and 1085 transitions. [2021-10-21 19:59:31,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-10-21 19:59:31,303 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:59:31,303 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:59:31,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2021-10-21 19:59:31,304 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:59:31,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:59:31,304 INFO L82 PathProgramCache]: Analyzing trace with hash 2074794403, now seen corresponding path program 1 times [2021-10-21 19:59:31,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:59:31,304 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132047034] [2021-10-21 19:59:31,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:59:31,305 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:59:31,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:59:31,371 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-21 19:59:31,371 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:59:31,372 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132047034] [2021-10-21 19:59:31,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132047034] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:59:31,372 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:59:31,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:59:31,372 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071831925] [2021-10-21 19:59:31,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:59:31,373 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:59:31,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:59:31,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:59:31,374 INFO L87 Difference]: Start difference. First operand 721 states and 1085 transitions. Second operand has 4 states, 4 states have (on average 29.75) internal successors, (119), 4 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:59:33,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:59:33,644 INFO L93 Difference]: Finished difference Result 1451 states and 2184 transitions. [2021-10-21 19:59:33,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:59:33,644 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.75) internal successors, (119), 4 states have internal predecessors, (119), 0 states have call successors, (0), 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 129 [2021-10-21 19:59:33,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:59:33,647 INFO L225 Difference]: With dead ends: 1451 [2021-10-21 19:59:33,647 INFO L226 Difference]: Without dead ends: 753 [2021-10-21 19:59:33,648 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:59:33,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 753 states. [2021-10-21 19:59:33,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 753 to 727. [2021-10-21 19:59:33,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 727 states, 726 states have (on average 1.502754820936639) internal successors, (1091), 726 states have internal predecessors, (1091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:59:33,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 727 states to 727 states and 1091 transitions. [2021-10-21 19:59:33,669 INFO L78 Accepts]: Start accepts. Automaton has 727 states and 1091 transitions. Word has length 129 [2021-10-21 19:59:33,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:59:33,669 INFO L470 AbstractCegarLoop]: Abstraction has 727 states and 1091 transitions. [2021-10-21 19:59:33,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.75) internal successors, (119), 4 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:59:33,669 INFO L276 IsEmpty]: Start isEmpty. Operand 727 states and 1091 transitions. [2021-10-21 19:59:33,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-10-21 19:59:33,670 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:59:33,671 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 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] [2021-10-21 19:59:33,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2021-10-21 19:59:33,671 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:59:33,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:59:33,671 INFO L82 PathProgramCache]: Analyzing trace with hash 654732764, now seen corresponding path program 1 times [2021-10-21 19:59:33,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:59:33,672 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437735764] [2021-10-21 19:59:33,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:59:33,672 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:59:33,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:59:33,745 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 113 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-10-21 19:59:33,745 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:59:33,745 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437735764] [2021-10-21 19:59:33,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437735764] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:59:33,746 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:59:33,746 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:59:33,746 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679639021] [2021-10-21 19:59:33,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:59:33,747 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:59:33,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:59:33,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:59:33,747 INFO L87 Difference]: Start difference. First operand 727 states and 1091 transitions. Second operand has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:59:35,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:59:35,688 INFO L93 Difference]: Finished difference Result 1465 states and 2198 transitions. [2021-10-21 19:59:35,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:59:35,689 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 134 [2021-10-21 19:59:35,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:59:35,692 INFO L225 Difference]: With dead ends: 1465 [2021-10-21 19:59:35,692 INFO L226 Difference]: Without dead ends: 761 [2021-10-21 19:59:35,693 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:59:35,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 761 states. [2021-10-21 19:59:35,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 761 to 727. [2021-10-21 19:59:35,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 727 states, 726 states have (on average 1.5) internal successors, (1089), 726 states have internal predecessors, (1089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:59:35,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 727 states to 727 states and 1089 transitions. [2021-10-21 19:59:35,711 INFO L78 Accepts]: Start accepts. Automaton has 727 states and 1089 transitions. Word has length 134 [2021-10-21 19:59:35,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:59:35,711 INFO L470 AbstractCegarLoop]: Abstraction has 727 states and 1089 transitions. [2021-10-21 19:59:35,711 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:59:35,711 INFO L276 IsEmpty]: Start isEmpty. Operand 727 states and 1089 transitions. [2021-10-21 19:59:35,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-10-21 19:59:35,712 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:59:35,713 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 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] [2021-10-21 19:59:35,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2021-10-21 19:59:35,713 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:59:35,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:59:35,714 INFO L82 PathProgramCache]: Analyzing trace with hash -694387610, now seen corresponding path program 1 times [2021-10-21 19:59:35,714 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:59:35,714 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643106682] [2021-10-21 19:59:35,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:59:35,714 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:59:35,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:59:35,778 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-10-21 19:59:35,778 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:59:35,778 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643106682] [2021-10-21 19:59:35,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643106682] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:59:35,778 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:59:35,779 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:59:35,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165975515] [2021-10-21 19:59:35,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:59:35,779 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:59:35,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:59:35,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:59:35,780 INFO L87 Difference]: Start difference. First operand 727 states and 1089 transitions. Second operand has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:59:37,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:59:37,152 INFO L93 Difference]: Finished difference Result 1557 states and 2344 transitions. [2021-10-21 19:59:37,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:59:37,153 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 134 [2021-10-21 19:59:37,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:59:37,156 INFO L225 Difference]: With dead ends: 1557 [2021-10-21 19:59:37,156 INFO L226 Difference]: Without dead ends: 853 [2021-10-21 19:59:37,157 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:59:37,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 853 states. [2021-10-21 19:59:37,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 853 to 783. [2021-10-21 19:59:37,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 783 states, 782 states have (on average 1.5179028132992327) internal successors, (1187), 782 states have internal predecessors, (1187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:59:37,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 783 states to 783 states and 1187 transitions. [2021-10-21 19:59:37,186 INFO L78 Accepts]: Start accepts. Automaton has 783 states and 1187 transitions. Word has length 134 [2021-10-21 19:59:37,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:59:37,186 INFO L470 AbstractCegarLoop]: Abstraction has 783 states and 1187 transitions. [2021-10-21 19:59:37,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:59:37,187 INFO L276 IsEmpty]: Start isEmpty. Operand 783 states and 1187 transitions. [2021-10-21 19:59:37,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-10-21 19:59:37,188 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:59:37,189 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 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] [2021-10-21 19:59:37,189 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2021-10-21 19:59:37,189 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:59:37,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:59:37,190 INFO L82 PathProgramCache]: Analyzing trace with hash 705283672, now seen corresponding path program 1 times [2021-10-21 19:59:37,190 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:59:37,190 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876648794] [2021-10-21 19:59:37,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:59:37,190 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:59:37,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:59:37,265 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 92 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-10-21 19:59:37,265 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:59:37,266 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876648794] [2021-10-21 19:59:37,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876648794] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:59:37,266 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:59:37,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:59:37,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004992910] [2021-10-21 19:59:37,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:59:37,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:59:37,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:59:37,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:59:37,268 INFO L87 Difference]: Start difference. First operand 783 states and 1187 transitions. Second operand has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:59:38,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:59:38,218 INFO L93 Difference]: Finished difference Result 1747 states and 2655 transitions. [2021-10-21 19:59:38,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:59:38,219 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2021-10-21 19:59:38,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:59:38,224 INFO L225 Difference]: With dead ends: 1747 [2021-10-21 19:59:38,224 INFO L226 Difference]: Without dead ends: 987 [2021-10-21 19:59:38,225 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:59:38,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 987 states. [2021-10-21 19:59:38,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 987 to 807. [2021-10-21 19:59:38,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 807 states, 806 states have (on average 1.5148883374689825) internal successors, (1221), 806 states have internal predecessors, (1221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:59:38,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 807 states to 807 states and 1221 transitions. [2021-10-21 19:59:38,257 INFO L78 Accepts]: Start accepts. Automaton has 807 states and 1221 transitions. Word has length 135 [2021-10-21 19:59:38,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:59:38,257 INFO L470 AbstractCegarLoop]: Abstraction has 807 states and 1221 transitions. [2021-10-21 19:59:38,257 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:59:38,257 INFO L276 IsEmpty]: Start isEmpty. Operand 807 states and 1221 transitions. [2021-10-21 19:59:38,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-10-21 19:59:38,259 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:59:38,259 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 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] [2021-10-21 19:59:38,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2021-10-21 19:59:38,260 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:59:38,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:59:38,260 INFO L82 PathProgramCache]: Analyzing trace with hash 1881007512, now seen corresponding path program 1 times [2021-10-21 19:59:38,260 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:59:38,260 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255505305] [2021-10-21 19:59:38,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:59:38,261 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:59:38,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:59:38,329 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 117 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-10-21 19:59:38,329 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:59:38,329 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255505305] [2021-10-21 19:59:38,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255505305] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:59:38,330 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:59:38,330 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:59:38,330 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097479897] [2021-10-21 19:59:38,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:59:38,331 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:59:38,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:59:38,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:59:38,331 INFO L87 Difference]: Start difference. First operand 807 states and 1221 transitions. Second operand has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:59:39,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:59:39,694 INFO L93 Difference]: Finished difference Result 1621 states and 2454 transitions. [2021-10-21 19:59:39,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:59:39,695 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2021-10-21 19:59:39,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:59:39,699 INFO L225 Difference]: With dead ends: 1621 [2021-10-21 19:59:39,700 INFO L226 Difference]: Without dead ends: 837 [2021-10-21 19:59:39,704 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:59:39,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 837 states. [2021-10-21 19:59:39,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 837 to 807. [2021-10-21 19:59:39,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 807 states, 806 states have (on average 1.5124069478908189) internal successors, (1219), 806 states have internal predecessors, (1219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:59:39,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 807 states to 807 states and 1219 transitions. [2021-10-21 19:59:39,724 INFO L78 Accepts]: Start accepts. Automaton has 807 states and 1219 transitions. Word has length 135 [2021-10-21 19:59:39,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:59:39,725 INFO L470 AbstractCegarLoop]: Abstraction has 807 states and 1219 transitions. [2021-10-21 19:59:39,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:59:39,725 INFO L276 IsEmpty]: Start isEmpty. Operand 807 states and 1219 transitions. [2021-10-21 19:59:39,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-10-21 19:59:39,726 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:59:39,726 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 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] [2021-10-21 19:59:39,726 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2021-10-21 19:59:39,726 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:59:39,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:59:39,727 INFO L82 PathProgramCache]: Analyzing trace with hash -1677430524, now seen corresponding path program 1 times [2021-10-21 19:59:39,727 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:59:39,727 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672638212] [2021-10-21 19:59:39,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:59:39,727 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:59:39,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:59:39,794 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 97 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-10-21 19:59:39,795 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:59:39,795 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672638212] [2021-10-21 19:59:39,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672638212] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:59:39,795 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:59:39,795 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:59:39,796 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334728169] [2021-10-21 19:59:39,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:59:39,796 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:59:39,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:59:39,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:59:39,797 INFO L87 Difference]: Start difference. First operand 807 states and 1219 transitions. Second operand has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:59:41,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:59:41,380 INFO L93 Difference]: Finished difference Result 1771 states and 2683 transitions. [2021-10-21 19:59:41,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:59:41,380 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 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 136 [2021-10-21 19:59:41,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:59:41,384 INFO L225 Difference]: With dead ends: 1771 [2021-10-21 19:59:41,384 INFO L226 Difference]: Without dead ends: 987 [2021-10-21 19:59:41,385 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:59:41,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 987 states. [2021-10-21 19:59:41,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 987 to 809. [2021-10-21 19:59:41,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 809 states, 808 states have (on average 1.511138613861386) internal successors, (1221), 808 states have internal predecessors, (1221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:59:41,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 809 states to 809 states and 1221 transitions. [2021-10-21 19:59:41,416 INFO L78 Accepts]: Start accepts. Automaton has 809 states and 1221 transitions. Word has length 136 [2021-10-21 19:59:41,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:59:41,416 INFO L470 AbstractCegarLoop]: Abstraction has 809 states and 1221 transitions. [2021-10-21 19:59:41,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:59:41,416 INFO L276 IsEmpty]: Start isEmpty. Operand 809 states and 1221 transitions. [2021-10-21 19:59:41,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-10-21 19:59:41,418 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:59:41,418 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 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] [2021-10-21 19:59:41,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2021-10-21 19:59:41,419 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:59:41,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:59:41,419 INFO L82 PathProgramCache]: Analyzing trace with hash -1974188749, now seen corresponding path program 1 times [2021-10-21 19:59:41,419 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:59:41,420 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935278207] [2021-10-21 19:59:41,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:59:41,420 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:59:41,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:59:41,480 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 102 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-10-21 19:59:41,480 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:59:41,480 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935278207] [2021-10-21 19:59:41,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935278207] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:59:41,480 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:59:41,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:59:41,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94199239] [2021-10-21 19:59:41,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:59:41,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:59:41,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:59:41,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:59:41,482 INFO L87 Difference]: Start difference. First operand 809 states and 1221 transitions. Second operand has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:59:42,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:59:42,158 INFO L93 Difference]: Finished difference Result 1773 states and 2683 transitions. [2021-10-21 19:59:42,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:59:42,158 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 137 [2021-10-21 19:59:42,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:59:42,161 INFO L225 Difference]: With dead ends: 1773 [2021-10-21 19:59:42,161 INFO L226 Difference]: Without dead ends: 987 [2021-10-21 19:59:42,162 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:59:42,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 987 states. [2021-10-21 19:59:42,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 987 to 811. [2021-10-21 19:59:42,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 811 states, 810 states have (on average 1.5098765432098766) internal successors, (1223), 810 states have internal predecessors, (1223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:59:42,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 811 states to 811 states and 1223 transitions. [2021-10-21 19:59:42,221 INFO L78 Accepts]: Start accepts. Automaton has 811 states and 1223 transitions. Word has length 137 [2021-10-21 19:59:42,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:59:42,221 INFO L470 AbstractCegarLoop]: Abstraction has 811 states and 1223 transitions. [2021-10-21 19:59:42,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:59:42,222 INFO L276 IsEmpty]: Start isEmpty. Operand 811 states and 1223 transitions. [2021-10-21 19:59:42,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-10-21 19:59:42,224 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:59:42,224 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 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] [2021-10-21 19:59:42,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2021-10-21 19:59:42,225 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:59:42,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:59:42,227 INFO L82 PathProgramCache]: Analyzing trace with hash -2030821313, now seen corresponding path program 1 times [2021-10-21 19:59:42,227 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:59:42,227 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168611183] [2021-10-21 19:59:42,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:59:42,227 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:59:42,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:59:42,295 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 107 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-10-21 19:59:42,295 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:59:42,296 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168611183] [2021-10-21 19:59:42,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168611183] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:59:42,296 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:59:42,296 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:59:42,296 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974238859] [2021-10-21 19:59:42,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:59:42,297 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:59:42,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:59:42,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:59:42,298 INFO L87 Difference]: Start difference. First operand 811 states and 1223 transitions. Second operand has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:59:44,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:59:44,662 INFO L93 Difference]: Finished difference Result 1755 states and 2659 transitions. [2021-10-21 19:59:44,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:59:44,663 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 0 states have call successors, (0), 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 138 [2021-10-21 19:59:44,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:59:44,665 INFO L225 Difference]: With dead ends: 1755 [2021-10-21 19:59:44,665 INFO L226 Difference]: Without dead ends: 967 [2021-10-21 19:59:44,666 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:59:44,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 967 states. [2021-10-21 19:59:44,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 967 to 813. [2021-10-21 19:59:44,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 813 states, 812 states have (on average 1.5086206896551724) internal successors, (1225), 812 states have internal predecessors, (1225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:59:44,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 813 states to 813 states and 1225 transitions. [2021-10-21 19:59:44,688 INFO L78 Accepts]: Start accepts. Automaton has 813 states and 1225 transitions. Word has length 138 [2021-10-21 19:59:44,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:59:44,688 INFO L470 AbstractCegarLoop]: Abstraction has 813 states and 1225 transitions. [2021-10-21 19:59:44,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:59:44,688 INFO L276 IsEmpty]: Start isEmpty. Operand 813 states and 1225 transitions. [2021-10-21 19:59:44,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-10-21 19:59:44,689 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:59:44,689 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:59:44,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2021-10-21 19:59:44,690 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:59:44,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:59:44,690 INFO L82 PathProgramCache]: Analyzing trace with hash -1066825427, now seen corresponding path program 1 times [2021-10-21 19:59:44,690 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:59:44,690 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405177087] [2021-10-21 19:59:44,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:59:44,690 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:59:44,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:59:44,771 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 87 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-10-21 19:59:44,771 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:59:44,771 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405177087] [2021-10-21 19:59:44,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405177087] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:59:44,772 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:59:44,772 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:59:44,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465191002] [2021-10-21 19:59:44,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:59:44,772 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:59:44,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:59:44,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:59:44,773 INFO L87 Difference]: Start difference. First operand 813 states and 1225 transitions. Second operand has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:59:47,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:59:47,126 INFO L93 Difference]: Finished difference Result 1777 states and 2683 transitions. [2021-10-21 19:59:47,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:59:47,127 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 142 [2021-10-21 19:59:47,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:59:47,129 INFO L225 Difference]: With dead ends: 1777 [2021-10-21 19:59:47,129 INFO L226 Difference]: Without dead ends: 987 [2021-10-21 19:59:47,130 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:59:47,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 987 states. [2021-10-21 19:59:47,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 987 to 813. [2021-10-21 19:59:47,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 813 states, 812 states have (on average 1.5061576354679802) internal successors, (1223), 812 states have internal predecessors, (1223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:59:47,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 813 states to 813 states and 1223 transitions. [2021-10-21 19:59:47,152 INFO L78 Accepts]: Start accepts. Automaton has 813 states and 1223 transitions. Word has length 142 [2021-10-21 19:59:47,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:59:47,152 INFO L470 AbstractCegarLoop]: Abstraction has 813 states and 1223 transitions. [2021-10-21 19:59:47,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:59:47,153 INFO L276 IsEmpty]: Start isEmpty. Operand 813 states and 1223 transitions. [2021-10-21 19:59:47,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-10-21 19:59:47,154 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:59:47,155 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:59:47,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2021-10-21 19:59:47,155 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:59:47,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:59:47,156 INFO L82 PathProgramCache]: Analyzing trace with hash -778237745, now seen corresponding path program 1 times [2021-10-21 19:59:47,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:59:47,156 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523791107] [2021-10-21 19:59:47,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:59:47,156 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:59:47,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:59:47,216 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 91 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-10-21 19:59:47,217 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:59:47,217 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523791107] [2021-10-21 19:59:47,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523791107] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:59:47,217 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:59:47,218 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:59:47,218 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578857743] [2021-10-21 19:59:47,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:59:47,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:59:47,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:59:47,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:59:47,219 INFO L87 Difference]: Start difference. First operand 813 states and 1223 transitions. Second operand has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:59:49,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:59:49,620 INFO L93 Difference]: Finished difference Result 1777 states and 2679 transitions. [2021-10-21 19:59:49,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:59:49,621 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 0 states have call successors, (0), 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 143 [2021-10-21 19:59:49,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:59:49,622 INFO L225 Difference]: With dead ends: 1777 [2021-10-21 19:59:49,623 INFO L226 Difference]: Without dead ends: 987 [2021-10-21 19:59:49,624 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:59:49,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 987 states. [2021-10-21 19:59:49,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 987 to 813. [2021-10-21 19:59:49,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 813 states, 812 states have (on average 1.5036945812807883) internal successors, (1221), 812 states have internal predecessors, (1221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:59:49,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 813 states to 813 states and 1221 transitions. [2021-10-21 19:59:49,650 INFO L78 Accepts]: Start accepts. Automaton has 813 states and 1221 transitions. Word has length 143 [2021-10-21 19:59:49,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:59:49,650 INFO L470 AbstractCegarLoop]: Abstraction has 813 states and 1221 transitions. [2021-10-21 19:59:49,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:59:49,650 INFO L276 IsEmpty]: Start isEmpty. Operand 813 states and 1221 transitions. [2021-10-21 19:59:49,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-10-21 19:59:49,651 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:59:49,652 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:59:49,652 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2021-10-21 19:59:49,652 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:59:49,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:59:49,652 INFO L82 PathProgramCache]: Analyzing trace with hash 130983624, now seen corresponding path program 1 times [2021-10-21 19:59:49,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:59:49,653 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536289983] [2021-10-21 19:59:49,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:59:49,653 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:59:49,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:59:49,713 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-10-21 19:59:49,714 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:59:49,714 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536289983] [2021-10-21 19:59:49,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536289983] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:59:49,714 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:59:49,714 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:59:49,714 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038484136] [2021-10-21 19:59:49,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:59:49,715 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:59:49,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:59:49,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:59:49,716 INFO L87 Difference]: Start difference. First operand 813 states and 1221 transitions. Second operand has 4 states, 4 states have (on average 29.5) internal successors, (118), 4 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:59:51,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:59:51,496 INFO L93 Difference]: Finished difference Result 1777 states and 2675 transitions. [2021-10-21 19:59:51,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:59:51,496 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.5) internal successors, (118), 4 states have internal predecessors, (118), 0 states have call successors, (0), 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 144 [2021-10-21 19:59:51,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:59:51,498 INFO L225 Difference]: With dead ends: 1777 [2021-10-21 19:59:51,498 INFO L226 Difference]: Without dead ends: 987 [2021-10-21 19:59:51,499 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:59:51,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 987 states. [2021-10-21 19:59:51,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 987 to 813. [2021-10-21 19:59:51,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 813 states, 812 states have (on average 1.501231527093596) internal successors, (1219), 812 states have internal predecessors, (1219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:59:51,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 813 states to 813 states and 1219 transitions. [2021-10-21 19:59:51,523 INFO L78 Accepts]: Start accepts. Automaton has 813 states and 1219 transitions. Word has length 144 [2021-10-21 19:59:51,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:59:51,523 INFO L470 AbstractCegarLoop]: Abstraction has 813 states and 1219 transitions. [2021-10-21 19:59:51,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.5) internal successors, (118), 4 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:59:51,523 INFO L276 IsEmpty]: Start isEmpty. Operand 813 states and 1219 transitions. [2021-10-21 19:59:51,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-10-21 19:59:51,524 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:59:51,525 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:59:51,525 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2021-10-21 19:59:51,525 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:59:51,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:59:51,525 INFO L82 PathProgramCache]: Analyzing trace with hash -1194987190, now seen corresponding path program 1 times [2021-10-21 19:59:51,525 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:59:51,525 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123239509] [2021-10-21 19:59:51,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:59:51,526 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:59:51,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:59:51,582 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 99 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-10-21 19:59:51,583 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:59:51,583 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123239509] [2021-10-21 19:59:51,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123239509] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:59:51,583 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:59:51,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:59:51,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471844529] [2021-10-21 19:59:51,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:59:51,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:59:51,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:59:51,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:59:51,585 INFO L87 Difference]: Start difference. First operand 813 states and 1219 transitions. Second operand has 4 states, 4 states have (on average 29.75) internal successors, (119), 4 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:59:53,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:59:53,945 INFO L93 Difference]: Finished difference Result 1757 states and 2647 transitions. [2021-10-21 19:59:53,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:59:53,945 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.75) internal successors, (119), 4 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 145 [2021-10-21 19:59:53,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:59:53,949 INFO L225 Difference]: With dead ends: 1757 [2021-10-21 19:59:53,949 INFO L226 Difference]: Without dead ends: 967 [2021-10-21 19:59:53,949 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:59:53,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 967 states. [2021-10-21 19:59:53,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 967 to 783. [2021-10-21 19:59:53,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 783 states, 782 states have (on average 1.5051150895140666) internal successors, (1177), 782 states have internal predecessors, (1177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:59:53,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 783 states to 783 states and 1177 transitions. [2021-10-21 19:59:53,981 INFO L78 Accepts]: Start accepts. Automaton has 783 states and 1177 transitions. Word has length 145 [2021-10-21 19:59:53,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:59:53,982 INFO L470 AbstractCegarLoop]: Abstraction has 783 states and 1177 transitions. [2021-10-21 19:59:53,982 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.75) internal successors, (119), 4 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:59:53,982 INFO L276 IsEmpty]: Start isEmpty. Operand 783 states and 1177 transitions. [2021-10-21 19:59:53,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-10-21 19:59:53,984 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:59:53,984 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:59:53,984 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2021-10-21 19:59:53,984 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:59:53,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:59:53,985 INFO L82 PathProgramCache]: Analyzing trace with hash 2045167449, now seen corresponding path program 1 times [2021-10-21 19:59:53,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:59:53,985 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625911220] [2021-10-21 19:59:53,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:59:53,985 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:59:54,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:59:54,046 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 143 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-10-21 19:59:54,046 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:59:54,046 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625911220] [2021-10-21 19:59:54,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625911220] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:59:54,047 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:59:54,047 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:59:54,047 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477976119] [2021-10-21 19:59:54,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:59:54,048 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:59:54,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:59:54,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:59:54,048 INFO L87 Difference]: Start difference. First operand 783 states and 1177 transitions. Second operand has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:59:56,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:59:56,385 INFO L93 Difference]: Finished difference Result 1727 states and 2603 transitions. [2021-10-21 19:59:56,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:59:56,386 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 145 [2021-10-21 19:59:56,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:59:56,387 INFO L225 Difference]: With dead ends: 1727 [2021-10-21 19:59:56,387 INFO L226 Difference]: Without dead ends: 967 [2021-10-21 19:59:56,388 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:59:56,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 967 states. [2021-10-21 19:59:56,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 967 to 839. [2021-10-21 19:59:56,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 839 states, 838 states have (on average 1.5119331742243436) internal successors, (1267), 838 states have internal predecessors, (1267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:59:56,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 839 states to 839 states and 1267 transitions. [2021-10-21 19:59:56,421 INFO L78 Accepts]: Start accepts. Automaton has 839 states and 1267 transitions. Word has length 145 [2021-10-21 19:59:56,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:59:56,429 INFO L470 AbstractCegarLoop]: Abstraction has 839 states and 1267 transitions. [2021-10-21 19:59:56,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:59:56,430 INFO L276 IsEmpty]: Start isEmpty. Operand 839 states and 1267 transitions. [2021-10-21 19:59:56,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-10-21 19:59:56,431 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:59:56,431 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:59:56,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2021-10-21 19:59:56,432 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:59:56,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:59:56,432 INFO L82 PathProgramCache]: Analyzing trace with hash 1688798725, now seen corresponding path program 1 times [2021-10-21 19:59:56,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:59:56,432 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774706511] [2021-10-21 19:59:56,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:59:56,432 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:59:56,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:59:56,488 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 144 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-10-21 19:59:56,488 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:59:56,488 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774706511] [2021-10-21 19:59:56,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774706511] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:59:56,489 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:59:56,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:59:56,489 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902307716] [2021-10-21 19:59:56,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:59:56,490 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:59:56,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:59:56,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:59:56,490 INFO L87 Difference]: Start difference. First operand 839 states and 1267 transitions. Second operand has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:59:57,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:59:57,283 INFO L93 Difference]: Finished difference Result 1767 states and 2665 transitions. [2021-10-21 19:59:57,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:59:57,283 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 146 [2021-10-21 19:59:57,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:59:57,285 INFO L225 Difference]: With dead ends: 1767 [2021-10-21 19:59:57,285 INFO L226 Difference]: Without dead ends: 951 [2021-10-21 19:59:57,285 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:59:57,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2021-10-21 19:59:57,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 841. [2021-10-21 19:59:57,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 841 states, 840 states have (on average 1.5107142857142857) internal successors, (1269), 840 states have internal predecessors, (1269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:59:57,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 841 states to 841 states and 1269 transitions. [2021-10-21 19:59:57,307 INFO L78 Accepts]: Start accepts. Automaton has 841 states and 1269 transitions. Word has length 146 [2021-10-21 19:59:57,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:59:57,308 INFO L470 AbstractCegarLoop]: Abstraction has 841 states and 1269 transitions. [2021-10-21 19:59:57,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:59:57,308 INFO L276 IsEmpty]: Start isEmpty. Operand 841 states and 1269 transitions. [2021-10-21 19:59:57,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-10-21 19:59:57,309 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:59:57,309 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 5, 5, 4, 3, 3, 3, 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] [2021-10-21 19:59:57,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2021-10-21 19:59:57,309 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:59:57,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:59:57,310 INFO L82 PathProgramCache]: Analyzing trace with hash -954632208, now seen corresponding path program 1 times [2021-10-21 19:59:57,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:59:57,310 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446913391] [2021-10-21 19:59:57,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:59:57,310 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:59:57,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:59:57,386 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 144 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-10-21 19:59:57,386 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:59:57,386 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446913391] [2021-10-21 19:59:57,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446913391] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:59:57,387 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:59:57,387 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:59:57,387 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256823022] [2021-10-21 19:59:57,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:59:57,388 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:59:57,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:59:57,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:59:57,388 INFO L87 Difference]: Start difference. First operand 841 states and 1269 transitions. Second operand has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:59:58,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:59:58,356 INFO L93 Difference]: Finished difference Result 1769 states and 2665 transitions. [2021-10-21 19:59:58,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:59:58,357 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 148 [2021-10-21 19:59:58,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:59:58,358 INFO L225 Difference]: With dead ends: 1769 [2021-10-21 19:59:58,358 INFO L226 Difference]: Without dead ends: 951 [2021-10-21 19:59:58,359 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:59:58,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2021-10-21 19:59:58,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 841. [2021-10-21 19:59:58,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 841 states, 840 states have (on average 1.5083333333333333) internal successors, (1267), 840 states have internal predecessors, (1267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:59:58,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 841 states to 841 states and 1267 transitions. [2021-10-21 19:59:58,391 INFO L78 Accepts]: Start accepts. Automaton has 841 states and 1267 transitions. Word has length 148 [2021-10-21 19:59:58,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:59:58,391 INFO L470 AbstractCegarLoop]: Abstraction has 841 states and 1267 transitions. [2021-10-21 19:59:58,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:59:58,392 INFO L276 IsEmpty]: Start isEmpty. Operand 841 states and 1267 transitions. [2021-10-21 19:59:58,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-10-21 19:59:58,394 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:59:58,394 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:59:58,394 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2021-10-21 19:59:58,394 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:59:58,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:59:58,395 INFO L82 PathProgramCache]: Analyzing trace with hash 294687511, now seen corresponding path program 1 times [2021-10-21 19:59:58,395 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:59:58,395 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299283013] [2021-10-21 19:59:58,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:59:58,396 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:59:58,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:59:58,455 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 147 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-10-21 19:59:58,455 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:59:58,456 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299283013] [2021-10-21 19:59:58,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299283013] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:59:58,456 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:59:58,456 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:59:58,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023393813] [2021-10-21 19:59:58,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:59:58,457 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:59:58,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:59:58,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:59:58,458 INFO L87 Difference]: Start difference. First operand 841 states and 1267 transitions. Second operand has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:00:00,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:00:00,837 INFO L93 Difference]: Finished difference Result 1763 states and 2653 transitions. [2021-10-21 20:00:00,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 20:00:00,837 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 149 [2021-10-21 20:00:00,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:00:00,839 INFO L225 Difference]: With dead ends: 1763 [2021-10-21 20:00:00,839 INFO L226 Difference]: Without dead ends: 945 [2021-10-21 20:00:00,840 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 20:00:00,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 945 states. [2021-10-21 20:00:00,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 945 to 847. [2021-10-21 20:00:00,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 847 states, 846 states have (on average 1.5094562647754137) internal successors, (1277), 846 states have internal predecessors, (1277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:00:00,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 847 states to 847 states and 1277 transitions. [2021-10-21 20:00:00,876 INFO L78 Accepts]: Start accepts. Automaton has 847 states and 1277 transitions. Word has length 149 [2021-10-21 20:00:00,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:00:00,876 INFO L470 AbstractCegarLoop]: Abstraction has 847 states and 1277 transitions. [2021-10-21 20:00:00,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:00:00,876 INFO L276 IsEmpty]: Start isEmpty. Operand 847 states and 1277 transitions. [2021-10-21 20:00:00,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-10-21 20:00:00,878 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:00:00,878 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 3, 3, 3, 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] [2021-10-21 20:00:00,878 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2021-10-21 20:00:00,878 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:00:00,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:00:00,878 INFO L82 PathProgramCache]: Analyzing trace with hash -764666364, now seen corresponding path program 1 times [2021-10-21 20:00:00,878 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:00:00,878 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224078781] [2021-10-21 20:00:00,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:00:00,879 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:00:00,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:00:00,938 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 149 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-10-21 20:00:00,938 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:00:00,938 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224078781] [2021-10-21 20:00:00,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224078781] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:00:00,938 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:00:00,939 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 20:00:00,939 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341137759] [2021-10-21 20:00:00,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 20:00:00,939 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:00:00,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 20:00:00,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 20:00:00,940 INFO L87 Difference]: Start difference. First operand 847 states and 1277 transitions. Second operand has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:00:01,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:00:01,735 INFO L93 Difference]: Finished difference Result 1765 states and 2657 transitions. [2021-10-21 20:00:01,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 20:00:01,735 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 149 [2021-10-21 20:00:01,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:00:01,737 INFO L225 Difference]: With dead ends: 1765 [2021-10-21 20:00:01,738 INFO L226 Difference]: Without dead ends: 941 [2021-10-21 20:00:01,739 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 20:00:01,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 941 states. [2021-10-21 20:00:01,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 941 to 847. [2021-10-21 20:00:01,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 847 states, 846 states have (on average 1.5070921985815602) internal successors, (1275), 846 states have internal predecessors, (1275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:00:01,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 847 states to 847 states and 1275 transitions. [2021-10-21 20:00:01,775 INFO L78 Accepts]: Start accepts. Automaton has 847 states and 1275 transitions. Word has length 149 [2021-10-21 20:00:01,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:00:01,775 INFO L470 AbstractCegarLoop]: Abstraction has 847 states and 1275 transitions. [2021-10-21 20:00:01,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:00:01,775 INFO L276 IsEmpty]: Start isEmpty. Operand 847 states and 1275 transitions. [2021-10-21 20:00:01,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-10-21 20:00:01,777 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:00:01,777 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 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] [2021-10-21 20:00:01,778 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2021-10-21 20:00:01,778 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:00:01,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:00:01,778 INFO L82 PathProgramCache]: Analyzing trace with hash -910126522, now seen corresponding path program 1 times [2021-10-21 20:00:01,778 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:00:01,779 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875922651] [2021-10-21 20:00:01,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:00:01,779 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:00:01,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:00:01,841 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 100 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-10-21 20:00:01,841 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:00:01,841 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875922651] [2021-10-21 20:00:01,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875922651] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:00:01,842 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:00:01,842 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 20:00:01,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145970056] [2021-10-21 20:00:01,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 20:00:01,843 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:00:01,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 20:00:01,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 20:00:01,843 INFO L87 Difference]: Start difference. First operand 847 states and 1275 transitions. Second operand has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:00:03,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:00:03,568 INFO L93 Difference]: Finished difference Result 1741 states and 2616 transitions. [2021-10-21 20:00:03,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 20:00:03,568 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 149 [2021-10-21 20:00:03,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:00:03,569 INFO L225 Difference]: With dead ends: 1741 [2021-10-21 20:00:03,569 INFO L226 Difference]: Without dead ends: 917 [2021-10-21 20:00:03,570 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 20:00:03,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 917 states. [2021-10-21 20:00:03,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 917 to 847. [2021-10-21 20:00:03,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 847 states, 846 states have (on average 1.5047281323877069) internal successors, (1273), 846 states have internal predecessors, (1273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:00:03,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 847 states to 847 states and 1273 transitions. [2021-10-21 20:00:03,593 INFO L78 Accepts]: Start accepts. Automaton has 847 states and 1273 transitions. Word has length 149 [2021-10-21 20:00:03,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:00:03,594 INFO L470 AbstractCegarLoop]: Abstraction has 847 states and 1273 transitions. [2021-10-21 20:00:03,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:00:03,594 INFO L276 IsEmpty]: Start isEmpty. Operand 847 states and 1273 transitions. [2021-10-21 20:00:03,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-10-21 20:00:03,596 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:00:03,597 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 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] [2021-10-21 20:00:03,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2021-10-21 20:00:03,597 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:00:03,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:00:03,598 INFO L82 PathProgramCache]: Analyzing trace with hash -215538986, now seen corresponding path program 1 times [2021-10-21 20:00:03,598 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:00:03,598 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948872156] [2021-10-21 20:00:03,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:00:03,598 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:00:03,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:00:03,667 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 105 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-10-21 20:00:03,667 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:00:03,667 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948872156] [2021-10-21 20:00:03,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948872156] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:00:03,668 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:00:03,668 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 20:00:03,668 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697985614] [2021-10-21 20:00:03,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 20:00:03,669 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:00:03,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 20:00:03,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 20:00:03,669 INFO L87 Difference]: Start difference. First operand 847 states and 1273 transitions. Second operand has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:00:04,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:00:04,359 INFO L93 Difference]: Finished difference Result 1741 states and 2612 transitions. [2021-10-21 20:00:04,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 20:00:04,359 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2021-10-21 20:00:04,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:00:04,361 INFO L225 Difference]: With dead ends: 1741 [2021-10-21 20:00:04,361 INFO L226 Difference]: Without dead ends: 917 [2021-10-21 20:00:04,363 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 20:00:04,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 917 states. [2021-10-21 20:00:04,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 917 to 847. [2021-10-21 20:00:04,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 847 states, 846 states have (on average 1.5023640661938533) internal successors, (1271), 846 states have internal predecessors, (1271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:00:04,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 847 states to 847 states and 1271 transitions. [2021-10-21 20:00:04,410 INFO L78 Accepts]: Start accepts. Automaton has 847 states and 1271 transitions. Word has length 150 [2021-10-21 20:00:04,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:00:04,410 INFO L470 AbstractCegarLoop]: Abstraction has 847 states and 1271 transitions. [2021-10-21 20:00:04,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:00:04,411 INFO L276 IsEmpty]: Start isEmpty. Operand 847 states and 1271 transitions. [2021-10-21 20:00:04,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-10-21 20:00:04,413 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:00:04,413 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 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] [2021-10-21 20:00:04,413 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2021-10-21 20:00:04,413 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:00:04,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:00:04,414 INFO L82 PathProgramCache]: Analyzing trace with hash 394775969, now seen corresponding path program 1 times [2021-10-21 20:00:04,414 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:00:04,414 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48587173] [2021-10-21 20:00:04,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:00:04,415 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:00:04,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:00:04,479 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 110 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-10-21 20:00:04,479 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:00:04,479 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48587173] [2021-10-21 20:00:04,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48587173] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:00:04,480 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:00:04,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 20:00:04,480 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996364456] [2021-10-21 20:00:04,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 20:00:04,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:00:04,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 20:00:04,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 20:00:04,481 INFO L87 Difference]: Start difference. First operand 847 states and 1271 transitions. Second operand has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:00:05,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:00:05,862 INFO L93 Difference]: Finished difference Result 1741 states and 2608 transitions. [2021-10-21 20:00:05,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 20:00:05,862 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 151 [2021-10-21 20:00:05,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:00:05,864 INFO L225 Difference]: With dead ends: 1741 [2021-10-21 20:00:05,864 INFO L226 Difference]: Without dead ends: 917 [2021-10-21 20:00:05,865 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 20:00:05,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 917 states. [2021-10-21 20:00:05,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 917 to 847. [2021-10-21 20:00:05,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 847 states, 846 states have (on average 1.5) internal successors, (1269), 846 states have internal predecessors, (1269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:00:05,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 847 states to 847 states and 1269 transitions. [2021-10-21 20:00:05,887 INFO L78 Accepts]: Start accepts. Automaton has 847 states and 1269 transitions. Word has length 151 [2021-10-21 20:00:05,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:00:05,888 INFO L470 AbstractCegarLoop]: Abstraction has 847 states and 1269 transitions. [2021-10-21 20:00:05,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:00:05,888 INFO L276 IsEmpty]: Start isEmpty. Operand 847 states and 1269 transitions. [2021-10-21 20:00:05,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-10-21 20:00:05,889 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:00:05,889 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:00:05,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2021-10-21 20:00:05,890 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:00:05,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:00:05,890 INFO L82 PathProgramCache]: Analyzing trace with hash 390382574, now seen corresponding path program 1 times [2021-10-21 20:00:05,890 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:00:05,891 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864791794] [2021-10-21 20:00:05,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:00:05,891 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:00:05,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:00:05,950 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 136 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-10-21 20:00:05,950 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:00:05,950 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864791794] [2021-10-21 20:00:05,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864791794] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:00:05,950 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:00:05,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 20:00:05,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808803793] [2021-10-21 20:00:05,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 20:00:05,951 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:00:05,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 20:00:05,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 20:00:05,952 INFO L87 Difference]: Start difference. First operand 847 states and 1269 transitions. Second operand has 4 states, 4 states have (on average 31.5) internal successors, (126), 4 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:00:08,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:00:08,328 INFO L93 Difference]: Finished difference Result 1791 states and 2679 transitions. [2021-10-21 20:00:08,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 20:00:08,329 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.5) internal successors, (126), 4 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 152 [2021-10-21 20:00:08,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:00:08,330 INFO L225 Difference]: With dead ends: 1791 [2021-10-21 20:00:08,330 INFO L226 Difference]: Without dead ends: 967 [2021-10-21 20:00:08,331 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 20:00:08,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 967 states. [2021-10-21 20:00:08,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 967 to 847. [2021-10-21 20:00:08,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 847 states, 846 states have (on average 1.4976359338061467) internal successors, (1267), 846 states have internal predecessors, (1267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:00:08,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 847 states to 847 states and 1267 transitions. [2021-10-21 20:00:08,357 INFO L78 Accepts]: Start accepts. Automaton has 847 states and 1267 transitions. Word has length 152 [2021-10-21 20:00:08,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:00:08,358 INFO L470 AbstractCegarLoop]: Abstraction has 847 states and 1267 transitions. [2021-10-21 20:00:08,358 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.5) internal successors, (126), 4 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:00:08,358 INFO L276 IsEmpty]: Start isEmpty. Operand 847 states and 1267 transitions. [2021-10-21 20:00:08,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-10-21 20:00:08,360 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:00:08,360 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:00:08,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2021-10-21 20:00:08,361 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:00:08,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:00:08,361 INFO L82 PathProgramCache]: Analyzing trace with hash 479112093, now seen corresponding path program 1 times [2021-10-21 20:00:08,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:00:08,361 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079906018] [2021-10-21 20:00:08,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:00:08,362 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:00:08,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:00:08,440 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 148 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-10-21 20:00:08,440 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:00:08,441 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079906018] [2021-10-21 20:00:08,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079906018] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:00:08,441 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:00:08,441 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 20:00:08,441 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871970368] [2021-10-21 20:00:08,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 20:00:08,442 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:00:08,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 20:00:08,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 20:00:08,443 INFO L87 Difference]: Start difference. First operand 847 states and 1267 transitions. Second operand has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:00:09,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:00:09,034 INFO L93 Difference]: Finished difference Result 1765 states and 2637 transitions. [2021-10-21 20:00:09,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 20:00:09,035 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 152 [2021-10-21 20:00:09,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:00:09,037 INFO L225 Difference]: With dead ends: 1765 [2021-10-21 20:00:09,037 INFO L226 Difference]: Without dead ends: 941 [2021-10-21 20:00:09,038 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 20:00:09,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 941 states. [2021-10-21 20:00:09,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 941 to 849. [2021-10-21 20:00:09,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 849 states, 848 states have (on average 1.4964622641509433) internal successors, (1269), 848 states have internal predecessors, (1269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:00:09,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 849 states to 849 states and 1269 transitions. [2021-10-21 20:00:09,079 INFO L78 Accepts]: Start accepts. Automaton has 849 states and 1269 transitions. Word has length 152 [2021-10-21 20:00:09,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:00:09,080 INFO L470 AbstractCegarLoop]: Abstraction has 849 states and 1269 transitions. [2021-10-21 20:00:09,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:00:09,080 INFO L276 IsEmpty]: Start isEmpty. Operand 849 states and 1269 transitions. [2021-10-21 20:00:09,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-10-21 20:00:09,082 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:00:09,082 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 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] [2021-10-21 20:00:09,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2021-10-21 20:00:09,083 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:00:09,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:00:09,083 INFO L82 PathProgramCache]: Analyzing trace with hash -1607359087, now seen corresponding path program 1 times [2021-10-21 20:00:09,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:00:09,083 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960918511] [2021-10-21 20:00:09,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:00:09,084 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:00:09,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:00:09,158 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 115 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-10-21 20:00:09,158 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:00:09,159 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960918511] [2021-10-21 20:00:09,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960918511] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:00:09,159 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:00:09,159 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 20:00:09,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504193726] [2021-10-21 20:00:09,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 20:00:09,160 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:00:09,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 20:00:09,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 20:00:09,161 INFO L87 Difference]: Start difference. First operand 849 states and 1269 transitions. Second operand has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:00:10,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:00:10,625 INFO L93 Difference]: Finished difference Result 1725 states and 2580 transitions. [2021-10-21 20:00:10,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 20:00:10,626 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 152 [2021-10-21 20:00:10,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:00:10,627 INFO L225 Difference]: With dead ends: 1725 [2021-10-21 20:00:10,627 INFO L226 Difference]: Without dead ends: 899 [2021-10-21 20:00:10,628 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 20:00:10,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 899 states. [2021-10-21 20:00:10,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 899 to 849. [2021-10-21 20:00:10,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 849 states, 848 states have (on average 1.4941037735849056) internal successors, (1267), 848 states have internal predecessors, (1267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:00:10,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 849 states to 849 states and 1267 transitions. [2021-10-21 20:00:10,651 INFO L78 Accepts]: Start accepts. Automaton has 849 states and 1267 transitions. Word has length 152 [2021-10-21 20:00:10,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:00:10,652 INFO L470 AbstractCegarLoop]: Abstraction has 849 states and 1267 transitions. [2021-10-21 20:00:10,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:00:10,652 INFO L276 IsEmpty]: Start isEmpty. Operand 849 states and 1267 transitions. [2021-10-21 20:00:10,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-10-21 20:00:10,653 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:00:10,653 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:00:10,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2021-10-21 20:00:10,653 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:00:10,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:00:10,654 INFO L82 PathProgramCache]: Analyzing trace with hash 1930075152, now seen corresponding path program 1 times [2021-10-21 20:00:10,654 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:00:10,654 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989860664] [2021-10-21 20:00:10,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:00:10,654 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:00:10,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:00:10,711 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 138 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-10-21 20:00:10,712 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:00:10,712 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989860664] [2021-10-21 20:00:10,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989860664] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:00:10,712 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:00:10,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 20:00:10,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677789230] [2021-10-21 20:00:10,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 20:00:10,713 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:00:10,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 20:00:10,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 20:00:10,714 INFO L87 Difference]: Start difference. First operand 849 states and 1267 transitions. Second operand has 4 states, 4 states have (on average 31.75) internal successors, (127), 4 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:00:11,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:00:11,815 INFO L93 Difference]: Finished difference Result 1777 states and 2645 transitions. [2021-10-21 20:00:11,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 20:00:11,816 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.75) internal successors, (127), 4 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 153 [2021-10-21 20:00:11,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:00:11,818 INFO L225 Difference]: With dead ends: 1777 [2021-10-21 20:00:11,818 INFO L226 Difference]: Without dead ends: 951 [2021-10-21 20:00:11,819 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 20:00:11,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2021-10-21 20:00:11,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 849. [2021-10-21 20:00:11,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 849 states, 848 states have (on average 1.491745283018868) internal successors, (1265), 848 states have internal predecessors, (1265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:00:11,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 849 states to 849 states and 1265 transitions. [2021-10-21 20:00:11,858 INFO L78 Accepts]: Start accepts. Automaton has 849 states and 1265 transitions. Word has length 153 [2021-10-21 20:00:11,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:00:11,858 INFO L470 AbstractCegarLoop]: Abstraction has 849 states and 1265 transitions. [2021-10-21 20:00:11,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.75) internal successors, (127), 4 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:00:11,859 INFO L276 IsEmpty]: Start isEmpty. Operand 849 states and 1265 transitions. [2021-10-21 20:00:11,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-10-21 20:00:11,861 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:00:11,861 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:00:11,861 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2021-10-21 20:00:11,861 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:00:11,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:00:11,862 INFO L82 PathProgramCache]: Analyzing trace with hash 656694156, now seen corresponding path program 1 times [2021-10-21 20:00:11,862 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:00:11,862 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621958186] [2021-10-21 20:00:11,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:00:11,862 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:00:11,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:00:11,920 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 149 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-10-21 20:00:11,920 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:00:11,921 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621958186] [2021-10-21 20:00:11,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621958186] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:00:11,921 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:00:11,921 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 20:00:11,921 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674006596] [2021-10-21 20:00:11,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 20:00:11,922 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:00:11,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 20:00:11,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 20:00:11,923 INFO L87 Difference]: Start difference. First operand 849 states and 1265 transitions. Second operand has 4 states, 4 states have (on average 28.75) internal successors, (115), 4 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:00:12,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:00:12,872 INFO L93 Difference]: Finished difference Result 1755 states and 2613 transitions. [2021-10-21 20:00:12,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 20:00:12,873 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.75) internal successors, (115), 4 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 153 [2021-10-21 20:00:12,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:00:12,874 INFO L225 Difference]: With dead ends: 1755 [2021-10-21 20:00:12,874 INFO L226 Difference]: Without dead ends: 929 [2021-10-21 20:00:12,875 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 20:00:12,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 929 states. [2021-10-21 20:00:12,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 929 to 851. [2021-10-21 20:00:12,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 851 states, 850 states have (on average 1.4905882352941175) internal successors, (1267), 850 states have internal predecessors, (1267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:00:12,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 851 states to 851 states and 1267 transitions. [2021-10-21 20:00:12,915 INFO L78 Accepts]: Start accepts. Automaton has 851 states and 1267 transitions. Word has length 153 [2021-10-21 20:00:12,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:00:12,915 INFO L470 AbstractCegarLoop]: Abstraction has 851 states and 1267 transitions. [2021-10-21 20:00:12,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.75) internal successors, (115), 4 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:00:12,915 INFO L276 IsEmpty]: Start isEmpty. Operand 851 states and 1267 transitions. [2021-10-21 20:00:12,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-10-21 20:00:12,917 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:00:12,918 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:00:12,918 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2021-10-21 20:00:12,918 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:00:12,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:00:12,919 INFO L82 PathProgramCache]: Analyzing trace with hash 1181317578, now seen corresponding path program 1 times [2021-10-21 20:00:12,919 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:00:12,919 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331759495] [2021-10-21 20:00:12,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:00:12,919 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:00:12,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:00:12,981 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 150 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-10-21 20:00:12,981 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:00:12,981 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331759495] [2021-10-21 20:00:12,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331759495] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:00:12,981 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:00:12,982 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 20:00:12,982 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445071874] [2021-10-21 20:00:12,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 20:00:12,982 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:00:12,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 20:00:12,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 20:00:12,983 INFO L87 Difference]: Start difference. First operand 851 states and 1267 transitions. Second operand has 4 states, 4 states have (on average 28.75) internal successors, (115), 4 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:00:13,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:00:13,986 INFO L93 Difference]: Finished difference Result 1757 states and 2613 transitions. [2021-10-21 20:00:13,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 20:00:13,986 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.75) internal successors, (115), 4 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 153 [2021-10-21 20:00:13,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:00:13,989 INFO L225 Difference]: With dead ends: 1757 [2021-10-21 20:00:13,989 INFO L226 Difference]: Without dead ends: 929 [2021-10-21 20:00:13,990 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 20:00:13,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 929 states. [2021-10-21 20:00:14,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 929 to 853. [2021-10-21 20:00:14,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 853 states, 852 states have (on average 1.4894366197183098) internal successors, (1269), 852 states have internal predecessors, (1269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:00:14,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 1269 transitions. [2021-10-21 20:00:14,031 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 1269 transitions. Word has length 153 [2021-10-21 20:00:14,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:00:14,031 INFO L470 AbstractCegarLoop]: Abstraction has 853 states and 1269 transitions. [2021-10-21 20:00:14,031 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.75) internal successors, (115), 4 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:00:14,032 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 1269 transitions. [2021-10-21 20:00:14,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-10-21 20:00:14,033 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:00:14,034 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:00:14,034 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2021-10-21 20:00:14,034 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:00:14,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:00:14,035 INFO L82 PathProgramCache]: Analyzing trace with hash -680591269, now seen corresponding path program 1 times [2021-10-21 20:00:14,035 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:00:14,035 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290138114] [2021-10-21 20:00:14,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:00:14,035 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:00:14,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:00:14,098 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 151 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-10-21 20:00:14,099 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:00:14,099 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290138114] [2021-10-21 20:00:14,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290138114] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:00:14,099 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:00:14,099 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 20:00:14,100 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291098915] [2021-10-21 20:00:14,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 20:00:14,100 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:00:14,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 20:00:14,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 20:00:14,101 INFO L87 Difference]: Start difference. First operand 853 states and 1269 transitions. Second operand has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:00:15,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:00:15,451 INFO L93 Difference]: Finished difference Result 1753 states and 2606 transitions. [2021-10-21 20:00:15,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 20:00:15,451 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 154 [2021-10-21 20:00:15,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:00:15,452 INFO L225 Difference]: With dead ends: 1753 [2021-10-21 20:00:15,453 INFO L226 Difference]: Without dead ends: 923 [2021-10-21 20:00:15,453 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 20:00:15,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 923 states. [2021-10-21 20:00:15,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 923 to 855. [2021-10-21 20:00:15,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 855 states, 854 states have (on average 1.4882903981264637) internal successors, (1271), 854 states have internal predecessors, (1271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:00:15,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 855 states to 855 states and 1271 transitions. [2021-10-21 20:00:15,509 INFO L78 Accepts]: Start accepts. Automaton has 855 states and 1271 transitions. Word has length 154 [2021-10-21 20:00:15,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:00:15,509 INFO L470 AbstractCegarLoop]: Abstraction has 855 states and 1271 transitions. [2021-10-21 20:00:15,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:00:15,510 INFO L276 IsEmpty]: Start isEmpty. Operand 855 states and 1271 transitions. [2021-10-21 20:00:15,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-10-21 20:00:15,512 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:00:15,512 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:00:15,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2021-10-21 20:00:15,512 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:00:15,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:00:15,513 INFO L82 PathProgramCache]: Analyzing trace with hash -1016219845, now seen corresponding path program 1 times [2021-10-21 20:00:15,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:00:15,513 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492947277] [2021-10-21 20:00:15,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:00:15,513 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:00:15,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:00:15,574 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 128 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-10-21 20:00:15,574 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:00:15,574 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492947277] [2021-10-21 20:00:15,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492947277] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:00:15,575 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:00:15,575 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 20:00:15,575 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26376119] [2021-10-21 20:00:15,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 20:00:15,576 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:00:15,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 20:00:15,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 20:00:15,576 INFO L87 Difference]: Start difference. First operand 855 states and 1271 transitions. Second operand has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:00:17,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:00:17,276 INFO L93 Difference]: Finished difference Result 1783 states and 2641 transitions. [2021-10-21 20:00:17,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 20:00:17,277 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 155 [2021-10-21 20:00:17,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:00:17,278 INFO L225 Difference]: With dead ends: 1783 [2021-10-21 20:00:17,278 INFO L226 Difference]: Without dead ends: 951 [2021-10-21 20:00:17,279 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 20:00:17,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2021-10-21 20:00:17,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 855. [2021-10-21 20:00:17,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 855 states, 854 states have (on average 1.4859484777517564) internal successors, (1269), 854 states have internal predecessors, (1269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:00:17,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 855 states to 855 states and 1269 transitions. [2021-10-21 20:00:17,323 INFO L78 Accepts]: Start accepts. Automaton has 855 states and 1269 transitions. Word has length 155 [2021-10-21 20:00:17,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:00:17,323 INFO L470 AbstractCegarLoop]: Abstraction has 855 states and 1269 transitions. [2021-10-21 20:00:17,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:00:17,323 INFO L276 IsEmpty]: Start isEmpty. Operand 855 states and 1269 transitions. [2021-10-21 20:00:17,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-10-21 20:00:17,325 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:00:17,325 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:00:17,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2021-10-21 20:00:17,326 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:00:17,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:00:17,326 INFO L82 PathProgramCache]: Analyzing trace with hash -768830814, now seen corresponding path program 1 times [2021-10-21 20:00:17,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:00:17,327 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799300392] [2021-10-21 20:00:17,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:00:17,327 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:00:17,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:00:17,388 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 152 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-10-21 20:00:17,388 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:00:17,388 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799300392] [2021-10-21 20:00:17,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799300392] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:00:17,389 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:00:17,389 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 20:00:17,389 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399315136] [2021-10-21 20:00:17,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 20:00:17,390 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:00:17,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 20:00:17,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 20:00:17,390 INFO L87 Difference]: Start difference. First operand 855 states and 1269 transitions. Second operand has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:00:18,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:00:18,418 INFO L93 Difference]: Finished difference Result 1755 states and 2602 transitions. [2021-10-21 20:00:18,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 20:00:18,418 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 0 states have call successors, (0), 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 155 [2021-10-21 20:00:18,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:00:18,420 INFO L225 Difference]: With dead ends: 1755 [2021-10-21 20:00:18,420 INFO L226 Difference]: Without dead ends: 923 [2021-10-21 20:00:18,422 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 20:00:18,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 923 states. [2021-10-21 20:00:18,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 923 to 857. [2021-10-21 20:00:18,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 857 states, 856 states have (on average 1.4848130841121496) internal successors, (1271), 856 states have internal predecessors, (1271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:00:18,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 857 states to 857 states and 1271 transitions. [2021-10-21 20:00:18,475 INFO L78 Accepts]: Start accepts. Automaton has 857 states and 1271 transitions. Word has length 155 [2021-10-21 20:00:18,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:00:18,475 INFO L470 AbstractCegarLoop]: Abstraction has 857 states and 1271 transitions. [2021-10-21 20:00:18,475 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:00:18,476 INFO L276 IsEmpty]: Start isEmpty. Operand 857 states and 1271 transitions. [2021-10-21 20:00:18,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-10-21 20:00:18,478 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:00:18,478 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:00:18,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2021-10-21 20:00:18,478 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:00:18,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:00:18,479 INFO L82 PathProgramCache]: Analyzing trace with hash -1614529236, now seen corresponding path program 1 times [2021-10-21 20:00:18,479 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:00:18,479 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87274050] [2021-10-21 20:00:18,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:00:18,479 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:00:18,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:00:18,539 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 144 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-10-21 20:00:18,540 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:00:18,540 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87274050] [2021-10-21 20:00:18,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87274050] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:00:18,540 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:00:18,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 20:00:18,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680378364] [2021-10-21 20:00:18,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 20:00:18,541 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:00:18,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 20:00:18,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 20:00:18,542 INFO L87 Difference]: Start difference. First operand 857 states and 1271 transitions. Second operand has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:00:19,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:00:19,239 INFO L93 Difference]: Finished difference Result 1779 states and 2629 transitions. [2021-10-21 20:00:19,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 20:00:19,239 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 156 [2021-10-21 20:00:19,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:00:19,240 INFO L225 Difference]: With dead ends: 1779 [2021-10-21 20:00:19,240 INFO L226 Difference]: Without dead ends: 945 [2021-10-21 20:00:19,241 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 20:00:19,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 945 states. [2021-10-21 20:00:19,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 945 to 857. [2021-10-21 20:00:19,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 857 states, 856 states have (on average 1.4824766355140186) internal successors, (1269), 856 states have internal predecessors, (1269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:00:19,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 857 states to 857 states and 1269 transitions. [2021-10-21 20:00:19,268 INFO L78 Accepts]: Start accepts. Automaton has 857 states and 1269 transitions. Word has length 156 [2021-10-21 20:00:19,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:00:19,269 INFO L470 AbstractCegarLoop]: Abstraction has 857 states and 1269 transitions. [2021-10-21 20:00:19,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:00:19,269 INFO L276 IsEmpty]: Start isEmpty. Operand 857 states and 1269 transitions. [2021-10-21 20:00:19,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-10-21 20:00:19,284 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:00:19,284 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:00:19,284 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2021-10-21 20:00:19,285 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:00:19,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:00:19,285 INFO L82 PathProgramCache]: Analyzing trace with hash 1621084185, now seen corresponding path program 1 times [2021-10-21 20:00:19,285 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:00:19,285 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256874778] [2021-10-21 20:00:19,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:00:19,285 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:00:19,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:00:19,343 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 132 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-10-21 20:00:19,344 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:00:19,344 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256874778] [2021-10-21 20:00:19,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256874778] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:00:19,344 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:00:19,344 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 20:00:19,345 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888343107] [2021-10-21 20:00:19,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 20:00:19,345 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:00:19,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 20:00:19,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 20:00:19,346 INFO L87 Difference]: Start difference. First operand 857 states and 1269 transitions. Second operand has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:00:20,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:00:20,639 INFO L93 Difference]: Finished difference Result 1775 states and 2621 transitions. [2021-10-21 20:00:20,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 20:00:20,639 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 0 states have call successors, (0), 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 156 [2021-10-21 20:00:20,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:00:20,640 INFO L225 Difference]: With dead ends: 1775 [2021-10-21 20:00:20,640 INFO L226 Difference]: Without dead ends: 941 [2021-10-21 20:00:20,641 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 20:00:20,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 941 states. [2021-10-21 20:00:20,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 941 to 857. [2021-10-21 20:00:20,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 857 states, 856 states have (on average 1.480140186915888) internal successors, (1267), 856 states have internal predecessors, (1267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:00:20,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 857 states to 857 states and 1267 transitions. [2021-10-21 20:00:20,684 INFO L78 Accepts]: Start accepts. Automaton has 857 states and 1267 transitions. Word has length 156 [2021-10-21 20:00:20,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:00:20,684 INFO L470 AbstractCegarLoop]: Abstraction has 857 states and 1267 transitions. [2021-10-21 20:00:20,684 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:00:20,684 INFO L276 IsEmpty]: Start isEmpty. Operand 857 states and 1267 transitions. [2021-10-21 20:00:20,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-10-21 20:00:20,686 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:00:20,686 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:00:20,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2021-10-21 20:00:20,687 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:00:20,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:00:20,687 INFO L82 PathProgramCache]: Analyzing trace with hash -2133855853, now seen corresponding path program 1 times [2021-10-21 20:00:20,687 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:00:20,688 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749127581] [2021-10-21 20:00:20,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:00:20,688 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:00:20,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:00:20,754 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 153 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-10-21 20:00:20,754 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:00:20,754 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749127581] [2021-10-21 20:00:20,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749127581] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:00:20,755 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:00:20,755 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 20:00:20,755 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065949789] [2021-10-21 20:00:20,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 20:00:20,755 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:00:20,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 20:00:20,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 20:00:20,756 INFO L87 Difference]: Start difference. First operand 857 states and 1267 transitions. Second operand has 4 states, 4 states have (on average 29.5) internal successors, (118), 4 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:00:21,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:00:21,621 INFO L93 Difference]: Finished difference Result 1751 states and 2587 transitions. [2021-10-21 20:00:21,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 20:00:21,622 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.5) internal successors, (118), 4 states have internal predecessors, (118), 0 states have call successors, (0), 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 156 [2021-10-21 20:00:21,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:00:21,623 INFO L225 Difference]: With dead ends: 1751 [2021-10-21 20:00:21,623 INFO L226 Difference]: Without dead ends: 917 [2021-10-21 20:00:21,624 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 20:00:21,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 917 states. [2021-10-21 20:00:21,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 917 to 859. [2021-10-21 20:00:21,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 859 states, 858 states have (on average 1.479020979020979) internal successors, (1269), 858 states have internal predecessors, (1269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:00:21,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 859 states to 859 states and 1269 transitions. [2021-10-21 20:00:21,653 INFO L78 Accepts]: Start accepts. Automaton has 859 states and 1269 transitions. Word has length 156 [2021-10-21 20:00:21,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:00:21,654 INFO L470 AbstractCegarLoop]: Abstraction has 859 states and 1269 transitions. [2021-10-21 20:00:21,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.5) internal successors, (118), 4 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:00:21,654 INFO L276 IsEmpty]: Start isEmpty. Operand 859 states and 1269 transitions. [2021-10-21 20:00:21,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-10-21 20:00:21,655 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:00:21,655 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-10-21 20:00:21,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2021-10-21 20:00:21,656 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:00:21,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:00:21,656 INFO L82 PathProgramCache]: Analyzing trace with hash 1254903144, now seen corresponding path program 1 times [2021-10-21 20:00:21,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:00:21,657 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202960341] [2021-10-21 20:00:21,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:00:21,657 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:00:21,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:00:21,732 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 146 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-10-21 20:00:21,732 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:00:21,733 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202960341] [2021-10-21 20:00:21,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202960341] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:00:21,733 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:00:21,733 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 20:00:21,733 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717783583] [2021-10-21 20:00:21,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 20:00:21,734 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:00:21,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 20:00:21,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 20:00:21,735 INFO L87 Difference]: Start difference. First operand 859 states and 1269 transitions. Second operand has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:00:24,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:00:24,061 INFO L93 Difference]: Finished difference Result 1777 states and 2617 transitions. [2021-10-21 20:00:24,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 20:00:24,061 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 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 159 [2021-10-21 20:00:24,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:00:24,062 INFO L225 Difference]: With dead ends: 1777 [2021-10-21 20:00:24,062 INFO L226 Difference]: Without dead ends: 941 [2021-10-21 20:00:24,063 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 20:00:24,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 941 states. [2021-10-21 20:00:24,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 941 to 859. [2021-10-21 20:00:24,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 859 states, 858 states have (on average 1.4766899766899766) internal successors, (1267), 858 states have internal predecessors, (1267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:00:24,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 859 states to 859 states and 1267 transitions. [2021-10-21 20:00:24,090 INFO L78 Accepts]: Start accepts. Automaton has 859 states and 1267 transitions. Word has length 159 [2021-10-21 20:00:24,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:00:24,091 INFO L470 AbstractCegarLoop]: Abstraction has 859 states and 1267 transitions. [2021-10-21 20:00:24,091 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:00:24,091 INFO L276 IsEmpty]: Start isEmpty. Operand 859 states and 1267 transitions. [2021-10-21 20:00:24,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-10-21 20:00:24,092 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:00:24,092 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 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] [2021-10-21 20:00:24,092 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2021-10-21 20:00:24,092 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:00:24,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:00:24,093 INFO L82 PathProgramCache]: Analyzing trace with hash 880411079, now seen corresponding path program 1 times [2021-10-21 20:00:24,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:00:24,093 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938285825] [2021-10-21 20:00:24,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:00:24,093 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:00:24,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:00:24,160 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 91 proven. 0 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2021-10-21 20:00:24,160 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:00:24,160 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938285825] [2021-10-21 20:00:24,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938285825] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:00:24,161 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:00:24,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 20:00:24,161 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208834867] [2021-10-21 20:00:24,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 20:00:24,162 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:00:24,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 20:00:24,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 20:00:24,162 INFO L87 Difference]: Start difference. First operand 859 states and 1267 transitions. Second operand has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:00:25,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:00:25,084 INFO L93 Difference]: Finished difference Result 1829 states and 2712 transitions. [2021-10-21 20:00:25,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 20:00:25,084 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 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 159 [2021-10-21 20:00:25,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:00:25,085 INFO L225 Difference]: With dead ends: 1829 [2021-10-21 20:00:25,085 INFO L226 Difference]: Without dead ends: 993 [2021-10-21 20:00:25,086 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 20:00:25,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 993 states. [2021-10-21 20:00:25,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 993 to 919. [2021-10-21 20:00:25,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 919 states, 918 states have (on average 1.4956427015250544) internal successors, (1373), 918 states have internal predecessors, (1373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:00:25,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 1373 transitions. [2021-10-21 20:00:25,114 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 1373 transitions. Word has length 159 [2021-10-21 20:00:25,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:00:25,114 INFO L470 AbstractCegarLoop]: Abstraction has 919 states and 1373 transitions. [2021-10-21 20:00:25,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:00:25,115 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 1373 transitions. [2021-10-21 20:00:25,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-10-21 20:00:25,116 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:00:25,116 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:00:25,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2021-10-21 20:00:25,116 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:00:25,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:00:25,117 INFO L82 PathProgramCache]: Analyzing trace with hash -1063587039, now seen corresponding path program 1 times [2021-10-21 20:00:25,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:00:25,117 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168530444] [2021-10-21 20:00:25,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:00:25,117 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:00:25,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:00:25,187 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 148 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-10-21 20:00:25,188 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:00:25,188 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168530444] [2021-10-21 20:00:25,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168530444] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:00:25,188 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:00:25,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 20:00:25,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166570422] [2021-10-21 20:00:25,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 20:00:25,189 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:00:25,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 20:00:25,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 20:00:25,190 INFO L87 Difference]: Start difference. First operand 919 states and 1373 transitions. Second operand has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:00:26,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:00:26,994 INFO L93 Difference]: Finished difference Result 1885 states and 2809 transitions. [2021-10-21 20:00:26,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 20:00:26,994 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 0 states have call successors, (0), 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 160 [2021-10-21 20:00:26,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:00:26,995 INFO L225 Difference]: With dead ends: 1885 [2021-10-21 20:00:26,995 INFO L226 Difference]: Without dead ends: 989 [2021-10-21 20:00:26,996 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 20:00:26,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 989 states. [2021-10-21 20:00:27,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 989 to 919. [2021-10-21 20:00:27,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 919 states, 918 states have (on average 1.4934640522875817) internal successors, (1371), 918 states have internal predecessors, (1371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:00:27,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 1371 transitions. [2021-10-21 20:00:27,052 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 1371 transitions. Word has length 160 [2021-10-21 20:00:27,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:00:27,052 INFO L470 AbstractCegarLoop]: Abstraction has 919 states and 1371 transitions. [2021-10-21 20:00:27,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:00:27,056 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 1371 transitions. [2021-10-21 20:00:27,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-10-21 20:00:27,060 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:00:27,061 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:00:27,061 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2021-10-21 20:00:27,061 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:00:27,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:00:27,062 INFO L82 PathProgramCache]: Analyzing trace with hash -538963617, now seen corresponding path program 1 times [2021-10-21 20:00:27,062 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:00:27,062 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094412634] [2021-10-21 20:00:27,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:00:27,063 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:00:27,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:00:27,179 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 150 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-10-21 20:00:27,179 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:00:27,179 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094412634] [2021-10-21 20:00:27,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094412634] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:00:27,180 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:00:27,180 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 20:00:27,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984734586] [2021-10-21 20:00:27,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 20:00:27,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:00:27,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 20:00:27,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 20:00:27,181 INFO L87 Difference]: Start difference. First operand 919 states and 1371 transitions. Second operand has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:00:28,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:00:28,854 INFO L93 Difference]: Finished difference Result 1885 states and 2805 transitions. [2021-10-21 20:00:28,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 20:00:28,854 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 0 states have call successors, (0), 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 160 [2021-10-21 20:00:28,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:00:28,855 INFO L225 Difference]: With dead ends: 1885 [2021-10-21 20:00:28,855 INFO L226 Difference]: Without dead ends: 989 [2021-10-21 20:00:28,856 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 20:00:28,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 989 states. [2021-10-21 20:00:28,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 989 to 919. [2021-10-21 20:00:28,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 919 states, 918 states have (on average 1.491285403050109) internal successors, (1369), 918 states have internal predecessors, (1369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:00:28,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 1369 transitions. [2021-10-21 20:00:28,889 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 1369 transitions. Word has length 160 [2021-10-21 20:00:28,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:00:28,889 INFO L470 AbstractCegarLoop]: Abstraction has 919 states and 1369 transitions. [2021-10-21 20:00:28,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:00:28,889 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 1369 transitions. [2021-10-21 20:00:28,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-10-21 20:00:28,890 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:00:28,890 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-10-21 20:00:28,890 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2021-10-21 20:00:28,890 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:00:28,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:00:28,891 INFO L82 PathProgramCache]: Analyzing trace with hash 1825266534, now seen corresponding path program 1 times [2021-10-21 20:00:28,891 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:00:28,891 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125773693] [2021-10-21 20:00:28,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:00:28,891 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:00:28,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:00:28,962 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 152 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-10-21 20:00:28,962 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:00:28,962 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125773693] [2021-10-21 20:00:28,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125773693] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:00:28,963 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:00:28,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 20:00:28,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581940707] [2021-10-21 20:00:28,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 20:00:28,963 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:00:28,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 20:00:28,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 20:00:28,964 INFO L87 Difference]: Start difference. First operand 919 states and 1369 transitions. Second operand has 4 states, 4 states have (on average 33.75) internal successors, (135), 4 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:00:29,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:00:29,633 INFO L93 Difference]: Finished difference Result 1879 states and 2794 transitions. [2021-10-21 20:00:29,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 20:00:29,634 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.75) internal successors, (135), 4 states have internal predecessors, (135), 0 states have call successors, (0), 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 161 [2021-10-21 20:00:29,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:00:29,635 INFO L225 Difference]: With dead ends: 1879 [2021-10-21 20:00:29,635 INFO L226 Difference]: Without dead ends: 983 [2021-10-21 20:00:29,638 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 20:00:29,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 983 states. [2021-10-21 20:00:29,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 983 to 919. [2021-10-21 20:00:29,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 919 states, 918 states have (on average 1.4891067538126361) internal successors, (1367), 918 states have internal predecessors, (1367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:00:29,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 1367 transitions. [2021-10-21 20:00:29,680 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 1367 transitions. Word has length 161 [2021-10-21 20:00:29,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:00:29,681 INFO L470 AbstractCegarLoop]: Abstraction has 919 states and 1367 transitions. [2021-10-21 20:00:29,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.75) internal successors, (135), 4 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:00:29,681 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 1367 transitions. [2021-10-21 20:00:29,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-10-21 20:00:29,682 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:00:29,682 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:00:29,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2021-10-21 20:00:29,682 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:00:29,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:00:29,683 INFO L82 PathProgramCache]: Analyzing trace with hash -396650249, now seen corresponding path program 1 times [2021-10-21 20:00:29,683 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:00:29,683 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503528764] [2021-10-21 20:00:29,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:00:29,683 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:00:29,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:00:29,753 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 154 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-10-21 20:00:29,754 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:00:29,754 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503528764] [2021-10-21 20:00:29,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503528764] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:00:29,754 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:00:29,755 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 20:00:29,755 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790517081] [2021-10-21 20:00:29,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 20:00:29,755 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:00:29,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 20:00:29,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 20:00:29,756 INFO L87 Difference]: Start difference. First operand 919 states and 1367 transitions. Second operand has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:00:30,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:00:30,649 INFO L93 Difference]: Finished difference Result 1879 states and 2790 transitions. [2021-10-21 20:00:30,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 20:00:30,649 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 0 states have call successors, (0), 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 162 [2021-10-21 20:00:30,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:00:30,650 INFO L225 Difference]: With dead ends: 1879 [2021-10-21 20:00:30,650 INFO L226 Difference]: Without dead ends: 983 [2021-10-21 20:00:30,651 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 20:00:30,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 983 states. [2021-10-21 20:00:30,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 983 to 919. [2021-10-21 20:00:30,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 919 states, 918 states have (on average 1.4869281045751634) internal successors, (1365), 918 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:00:30,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 1365 transitions. [2021-10-21 20:00:30,705 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 1365 transitions. Word has length 162 [2021-10-21 20:00:30,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:00:30,705 INFO L470 AbstractCegarLoop]: Abstraction has 919 states and 1365 transitions. [2021-10-21 20:00:30,705 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:00:30,706 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 1365 transitions. [2021-10-21 20:00:30,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-10-21 20:00:30,707 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:00:30,707 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 3, 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] [2021-10-21 20:00:30,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2021-10-21 20:00:30,708 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:00:30,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:00:30,709 INFO L82 PathProgramCache]: Analyzing trace with hash -985365069, now seen corresponding path program 1 times [2021-10-21 20:00:30,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:00:30,709 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68301237] [2021-10-21 20:00:30,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:00:30,710 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:00:30,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:00:30,775 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 177 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-10-21 20:00:30,775 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:00:30,775 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68301237] [2021-10-21 20:00:30,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68301237] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:00:30,775 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:00:30,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 20:00:30,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218306315] [2021-10-21 20:00:30,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 20:00:30,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:00:30,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 20:00:30,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 20:00:30,777 INFO L87 Difference]: Start difference. First operand 919 states and 1365 transitions. Second operand has 4 states, 4 states have (on average 29.5) internal successors, (118), 4 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:00:31,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:00:31,424 INFO L93 Difference]: Finished difference Result 1873 states and 2779 transitions. [2021-10-21 20:00:31,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 20:00:31,424 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.5) internal successors, (118), 4 states have internal predecessors, (118), 0 states have call successors, (0), 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 162 [2021-10-21 20:00:31,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:00:31,425 INFO L225 Difference]: With dead ends: 1873 [2021-10-21 20:00:31,425 INFO L226 Difference]: Without dead ends: 977 [2021-10-21 20:00:31,426 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 20:00:31,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 977 states. [2021-10-21 20:00:31,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 977 to 919. [2021-10-21 20:00:31,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 919 states, 918 states have (on average 1.4847494553376905) internal successors, (1363), 918 states have internal predecessors, (1363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:00:31,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 1363 transitions. [2021-10-21 20:00:31,458 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 1363 transitions. Word has length 162 [2021-10-21 20:00:31,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:00:31,458 INFO L470 AbstractCegarLoop]: Abstraction has 919 states and 1363 transitions. [2021-10-21 20:00:31,458 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.5) internal successors, (118), 4 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:00:31,458 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 1363 transitions. [2021-10-21 20:00:31,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-10-21 20:00:31,459 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:00:31,459 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 3, 3, 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] [2021-10-21 20:00:31,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2021-10-21 20:00:31,460 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:00:31,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:00:31,460 INFO L82 PathProgramCache]: Analyzing trace with hash -1170866494, now seen corresponding path program 1 times [2021-10-21 20:00:31,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:00:31,460 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754164373] [2021-10-21 20:00:31,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:00:31,460 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:00:31,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:00:31,516 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 152 proven. 0 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2021-10-21 20:00:31,516 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:00:31,517 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754164373] [2021-10-21 20:00:31,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754164373] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:00:31,517 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:00:31,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 20:00:31,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140233088] [2021-10-21 20:00:31,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 20:00:31,518 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:00:31,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 20:00:31,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 20:00:31,519 INFO L87 Difference]: Start difference. First operand 919 states and 1363 transitions. Second operand has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:00:32,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:00:32,908 INFO L93 Difference]: Finished difference Result 1865 states and 2768 transitions. [2021-10-21 20:00:32,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 20:00:32,908 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 162 [2021-10-21 20:00:32,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:00:32,909 INFO L225 Difference]: With dead ends: 1865 [2021-10-21 20:00:32,909 INFO L226 Difference]: Without dead ends: 969 [2021-10-21 20:00:32,910 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 20:00:32,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 969 states. [2021-10-21 20:00:32,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 969 to 919. [2021-10-21 20:00:32,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 919 states, 918 states have (on average 1.4825708061002179) internal successors, (1361), 918 states have internal predecessors, (1361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:00:32,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 1361 transitions. [2021-10-21 20:00:32,943 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 1361 transitions. Word has length 162 [2021-10-21 20:00:32,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:00:32,944 INFO L470 AbstractCegarLoop]: Abstraction has 919 states and 1361 transitions. [2021-10-21 20:00:32,944 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:00:32,944 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 1361 transitions. [2021-10-21 20:00:32,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-10-21 20:00:32,945 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:00:32,945 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:00:32,945 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2021-10-21 20:00:32,946 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:00:32,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:00:32,946 INFO L82 PathProgramCache]: Analyzing trace with hash 813807070, now seen corresponding path program 1 times [2021-10-21 20:00:32,946 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:00:32,946 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183600638] [2021-10-21 20:00:32,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:00:32,947 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:00:32,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:00:33,009 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 156 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-10-21 20:00:33,010 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:00:33,010 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183600638] [2021-10-21 20:00:33,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183600638] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:00:33,010 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:00:33,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 20:00:33,011 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434083743] [2021-10-21 20:00:33,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 20:00:33,011 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:00:33,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 20:00:33,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 20:00:33,012 INFO L87 Difference]: Start difference. First operand 919 states and 1361 transitions. Second operand has 4 states, 4 states have (on average 34.25) internal successors, (137), 4 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:00:33,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:00:33,610 INFO L93 Difference]: Finished difference Result 1873 states and 2771 transitions. [2021-10-21 20:00:33,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 20:00:33,611 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.25) internal successors, (137), 4 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 163 [2021-10-21 20:00:33,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:00:33,612 INFO L225 Difference]: With dead ends: 1873 [2021-10-21 20:00:33,612 INFO L226 Difference]: Without dead ends: 977 [2021-10-21 20:00:33,613 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 20:00:33,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 977 states. [2021-10-21 20:00:33,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 977 to 903. [2021-10-21 20:00:33,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 903 states, 902 states have (on average 1.4866962305986697) internal successors, (1341), 902 states have internal predecessors, (1341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:00:33,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 903 states to 903 states and 1341 transitions. [2021-10-21 20:00:33,657 INFO L78 Accepts]: Start accepts. Automaton has 903 states and 1341 transitions. Word has length 163 [2021-10-21 20:00:33,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:00:33,657 INFO L470 AbstractCegarLoop]: Abstraction has 903 states and 1341 transitions. [2021-10-21 20:00:33,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.25) internal successors, (137), 4 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:00:33,657 INFO L276 IsEmpty]: Start isEmpty. Operand 903 states and 1341 transitions. [2021-10-21 20:00:33,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-10-21 20:00:33,658 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:00:33,658 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:00:33,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2021-10-21 20:00:33,659 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:00:33,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:00:33,659 INFO L82 PathProgramCache]: Analyzing trace with hash 1510970663, now seen corresponding path program 1 times [2021-10-21 20:00:33,659 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:00:33,660 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096764874] [2021-10-21 20:00:33,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:00:33,660 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:00:33,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:00:33,720 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 178 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-10-21 20:00:33,720 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:00:33,721 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096764874] [2021-10-21 20:00:33,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096764874] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:00:33,721 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:00:33,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 20:00:33,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463514111] [2021-10-21 20:00:33,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 20:00:33,722 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:00:33,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 20:00:33,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 20:00:33,722 INFO L87 Difference]: Start difference. First operand 903 states and 1341 transitions. Second operand has 4 states, 4 states have (on average 29.75) internal successors, (119), 4 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:00:34,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:00:34,870 INFO L93 Difference]: Finished difference Result 1853 states and 2745 transitions. [2021-10-21 20:00:34,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 20:00:34,870 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.75) internal successors, (119), 4 states have internal predecessors, (119), 0 states have call successors, (0), 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 163 [2021-10-21 20:00:34,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:00:34,871 INFO L225 Difference]: With dead ends: 1853 [2021-10-21 20:00:34,871 INFO L226 Difference]: Without dead ends: 973 [2021-10-21 20:00:34,872 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 20:00:34,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 973 states. [2021-10-21 20:00:34,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 973 to 905. [2021-10-21 20:00:34,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 905 states, 904 states have (on average 1.4856194690265487) internal successors, (1343), 904 states have internal predecessors, (1343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:00:34,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 905 states to 905 states and 1343 transitions. [2021-10-21 20:00:34,905 INFO L78 Accepts]: Start accepts. Automaton has 905 states and 1343 transitions. Word has length 163 [2021-10-21 20:00:34,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:00:34,905 INFO L470 AbstractCegarLoop]: Abstraction has 905 states and 1343 transitions. [2021-10-21 20:00:34,905 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.75) internal successors, (119), 4 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:00:34,905 INFO L276 IsEmpty]: Start isEmpty. Operand 905 states and 1343 transitions. [2021-10-21 20:00:34,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-10-21 20:00:34,906 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:00:34,906 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 3, 3, 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] [2021-10-21 20:00:34,906 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2021-10-21 20:00:34,907 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:00:34,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:00:34,907 INFO L82 PathProgramCache]: Analyzing trace with hash 1122005362, now seen corresponding path program 1 times [2021-10-21 20:00:34,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:00:34,907 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875093521] [2021-10-21 20:00:34,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:00:34,907 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:00:34,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:00:34,959 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 157 proven. 0 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2021-10-21 20:00:34,959 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:00:34,959 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875093521] [2021-10-21 20:00:34,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875093521] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:00:34,960 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:00:34,960 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 20:00:34,960 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175072953] [2021-10-21 20:00:34,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 20:00:34,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:00:34,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 20:00:34,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 20:00:34,961 INFO L87 Difference]: Start difference. First operand 905 states and 1343 transitions. Second operand has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:00:35,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:00:35,735 INFO L93 Difference]: Finished difference Result 1833 states and 2724 transitions. [2021-10-21 20:00:35,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 20:00:35,736 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 0 states have call successors, (0), 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 163 [2021-10-21 20:00:35,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:00:35,737 INFO L225 Difference]: With dead ends: 1833 [2021-10-21 20:00:35,737 INFO L226 Difference]: Without dead ends: 951 [2021-10-21 20:00:35,737 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 20:00:35,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2021-10-21 20:00:35,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 905. [2021-10-21 20:00:35,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 905 states, 904 states have (on average 1.4834070796460177) internal successors, (1341), 904 states have internal predecessors, (1341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:00:35,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 905 states to 905 states and 1341 transitions. [2021-10-21 20:00:35,770 INFO L78 Accepts]: Start accepts. Automaton has 905 states and 1341 transitions. Word has length 163 [2021-10-21 20:00:35,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:00:35,771 INFO L470 AbstractCegarLoop]: Abstraction has 905 states and 1341 transitions. [2021-10-21 20:00:35,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:00:35,771 INFO L276 IsEmpty]: Start isEmpty. Operand 905 states and 1341 transitions. [2021-10-21 20:00:35,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-10-21 20:00:35,772 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:00:35,772 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:00:35,772 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2021-10-21 20:00:35,772 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:00:35,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:00:35,773 INFO L82 PathProgramCache]: Analyzing trace with hash 1991742780, now seen corresponding path program 1 times [2021-10-21 20:00:35,773 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:00:35,773 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988661088] [2021-10-21 20:00:35,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:00:35,773 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:00:35,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:00:35,834 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 154 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-10-21 20:00:35,834 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:00:35,834 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988661088] [2021-10-21 20:00:35,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988661088] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:00:35,834 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:00:35,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 20:00:35,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309479585] [2021-10-21 20:00:35,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 20:00:35,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:00:35,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 20:00:35,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 20:00:35,836 INFO L87 Difference]: Start difference. First operand 905 states and 1341 transitions. Second operand has 4 states, 4 states have (on average 31.75) internal successors, (127), 4 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:00:36,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:00:36,954 INFO L93 Difference]: Finished difference Result 1855 states and 2741 transitions. [2021-10-21 20:00:36,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 20:00:36,954 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.75) internal successors, (127), 4 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 165 [2021-10-21 20:00:36,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:00:36,955 INFO L225 Difference]: With dead ends: 1855 [2021-10-21 20:00:36,955 INFO L226 Difference]: Without dead ends: 973 [2021-10-21 20:00:36,956 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 20:00:36,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 973 states. [2021-10-21 20:00:36,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 973 to 929. [2021-10-21 20:00:36,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 929 states, 928 states have (on average 1.4752155172413792) internal successors, (1369), 928 states have internal predecessors, (1369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:00:36,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 929 states to 929 states and 1369 transitions. [2021-10-21 20:00:36,988 INFO L78 Accepts]: Start accepts. Automaton has 929 states and 1369 transitions. Word has length 165 [2021-10-21 20:00:36,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:00:36,988 INFO L470 AbstractCegarLoop]: Abstraction has 929 states and 1369 transitions. [2021-10-21 20:00:36,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.75) internal successors, (127), 4 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:00:36,988 INFO L276 IsEmpty]: Start isEmpty. Operand 929 states and 1369 transitions. [2021-10-21 20:00:36,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-10-21 20:00:36,989 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:00:36,989 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 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] [2021-10-21 20:00:36,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2021-10-21 20:00:36,989 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:00:36,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:00:36,990 INFO L82 PathProgramCache]: Analyzing trace with hash 1148404740, now seen corresponding path program 1 times [2021-10-21 20:00:36,990 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:00:36,990 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574991602] [2021-10-21 20:00:36,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:00:36,990 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:00:37,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:00:37,146 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 91 proven. 0 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2021-10-21 20:00:37,146 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:00:37,146 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574991602] [2021-10-21 20:00:37,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574991602] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:00:37,146 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:00:37,146 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-21 20:00:37,147 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361485309] [2021-10-21 20:00:37,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-21 20:00:37,147 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:00:37,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-21 20:00:37,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-21 20:00:37,147 INFO L87 Difference]: Start difference. First operand 929 states and 1369 transitions. Second operand has 5 states, 5 states have (on average 20.2) internal successors, (101), 5 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:00:38,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:00:38,998 INFO L93 Difference]: Finished difference Result 1993 states and 2952 transitions. [2021-10-21 20:00:38,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-21 20:00:38,999 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.2) internal successors, (101), 5 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 165 [2021-10-21 20:00:38,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:00:39,000 INFO L225 Difference]: With dead ends: 1993 [2021-10-21 20:00:39,000 INFO L226 Difference]: Without dead ends: 1087 [2021-10-21 20:00:39,001 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 38.8ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-21 20:00:39,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1087 states. [2021-10-21 20:00:39,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1087 to 995. [2021-10-21 20:00:39,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 995 states, 994 states have (on average 1.4959758551307847) internal successors, (1487), 994 states have internal predecessors, (1487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:00:39,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 995 states to 995 states and 1487 transitions. [2021-10-21 20:00:39,039 INFO L78 Accepts]: Start accepts. Automaton has 995 states and 1487 transitions. Word has length 165 [2021-10-21 20:00:39,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:00:39,039 INFO L470 AbstractCegarLoop]: Abstraction has 995 states and 1487 transitions. [2021-10-21 20:00:39,039 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.2) internal successors, (101), 5 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:00:39,039 INFO L276 IsEmpty]: Start isEmpty. Operand 995 states and 1487 transitions. [2021-10-21 20:00:39,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-10-21 20:00:39,040 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:00:39,040 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:00:39,041 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2021-10-21 20:00:39,041 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:00:39,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:00:39,041 INFO L82 PathProgramCache]: Analyzing trace with hash -204178227, now seen corresponding path program 1 times [2021-10-21 20:00:39,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:00:39,042 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263922023] [2021-10-21 20:00:39,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:00:39,042 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:00:39,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:00:39,106 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 154 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-10-21 20:00:39,106 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:00:39,107 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263922023] [2021-10-21 20:00:39,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263922023] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:00:39,107 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:00:39,107 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 20:00:39,107 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846991032] [2021-10-21 20:00:39,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 20:00:39,108 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:00:39,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 20:00:39,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 20:00:39,108 INFO L87 Difference]: Start difference. First operand 995 states and 1487 transitions. Second operand has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:00:40,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:00:40,456 INFO L93 Difference]: Finished difference Result 2001 states and 2990 transitions. [2021-10-21 20:00:40,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 20:00:40,457 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 166 [2021-10-21 20:00:40,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:00:40,458 INFO L225 Difference]: With dead ends: 2001 [2021-10-21 20:00:40,458 INFO L226 Difference]: Without dead ends: 1025 [2021-10-21 20:00:40,458 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 20:00:40,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1025 states. [2021-10-21 20:00:40,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1025 to 993. [2021-10-21 20:00:40,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 993 states, 992 states have (on average 1.4949596774193548) internal successors, (1483), 992 states have internal predecessors, (1483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:00:40,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 993 states to 993 states and 1483 transitions. [2021-10-21 20:00:40,491 INFO L78 Accepts]: Start accepts. Automaton has 993 states and 1483 transitions. Word has length 166 [2021-10-21 20:00:40,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:00:40,491 INFO L470 AbstractCegarLoop]: Abstraction has 993 states and 1483 transitions. [2021-10-21 20:00:40,492 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:00:40,492 INFO L276 IsEmpty]: Start isEmpty. Operand 993 states and 1483 transitions. [2021-10-21 20:00:40,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2021-10-21 20:00:40,492 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:00:40,493 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:00:40,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2021-10-21 20:00:40,493 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:00:40,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:00:40,493 INFO L82 PathProgramCache]: Analyzing trace with hash -251222594, now seen corresponding path program 1 times [2021-10-21 20:00:40,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:00:40,493 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828190673] [2021-10-21 20:00:40,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:00:40,493 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:00:40,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:00:40,557 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 165 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-10-21 20:00:40,557 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:00:40,558 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828190673] [2021-10-21 20:00:40,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828190673] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:00:40,558 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:00:40,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 20:00:40,558 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263706141] [2021-10-21 20:00:40,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 20:00:40,559 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:00:40,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 20:00:40,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 20:00:40,560 INFO L87 Difference]: Start difference. First operand 993 states and 1483 transitions. Second operand has 4 states, 4 states have (on average 34.25) internal successors, (137), 4 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:00:42,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:00:42,065 INFO L93 Difference]: Finished difference Result 2017 states and 3011 transitions. [2021-10-21 20:00:42,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 20:00:42,065 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.25) internal successors, (137), 4 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 169 [2021-10-21 20:00:42,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:00:42,066 INFO L225 Difference]: With dead ends: 2017 [2021-10-21 20:00:42,066 INFO L226 Difference]: Without dead ends: 1047 [2021-10-21 20:00:42,067 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 20:00:42,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1047 states. [2021-10-21 20:00:42,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1047 to 993. [2021-10-21 20:00:42,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 993 states, 992 states have (on average 1.4929435483870968) internal successors, (1481), 992 states have internal predecessors, (1481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:00:42,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 993 states to 993 states and 1481 transitions. [2021-10-21 20:00:42,107 INFO L78 Accepts]: Start accepts. Automaton has 993 states and 1481 transitions. Word has length 169 [2021-10-21 20:00:42,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:00:42,107 INFO L470 AbstractCegarLoop]: Abstraction has 993 states and 1481 transitions. [2021-10-21 20:00:42,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.25) internal successors, (137), 4 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:00:42,108 INFO L276 IsEmpty]: Start isEmpty. Operand 993 states and 1481 transitions. [2021-10-21 20:00:42,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-10-21 20:00:42,108 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:00:42,109 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:00:42,109 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2021-10-21 20:00:42,109 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:00:42,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:00:42,109 INFO L82 PathProgramCache]: Analyzing trace with hash -1500416388, now seen corresponding path program 1 times [2021-10-21 20:00:42,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:00:42,109 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399134130] [2021-10-21 20:00:42,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:00:42,109 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:00:42,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:00:42,171 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 167 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-10-21 20:00:42,171 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:00:42,171 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399134130] [2021-10-21 20:00:42,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399134130] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:00:42,172 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:00:42,172 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 20:00:42,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358738854] [2021-10-21 20:00:42,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 20:00:42,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:00:42,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 20:00:42,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 20:00:42,173 INFO L87 Difference]: Start difference. First operand 993 states and 1481 transitions. Second operand has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:00:44,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:00:44,274 INFO L93 Difference]: Finished difference Result 2013 states and 3003 transitions. [2021-10-21 20:00:44,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 20:00:44,274 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 0 states have call successors, (0), 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 170 [2021-10-21 20:00:44,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:00:44,276 INFO L225 Difference]: With dead ends: 2013 [2021-10-21 20:00:44,276 INFO L226 Difference]: Without dead ends: 1043 [2021-10-21 20:00:44,276 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 20:00:44,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1043 states. [2021-10-21 20:00:44,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1043 to 993. [2021-10-21 20:00:44,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 993 states, 992 states have (on average 1.4909274193548387) internal successors, (1479), 992 states have internal predecessors, (1479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:00:44,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 993 states to 993 states and 1479 transitions. [2021-10-21 20:00:44,326 INFO L78 Accepts]: Start accepts. Automaton has 993 states and 1479 transitions. Word has length 170 [2021-10-21 20:00:44,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:00:44,326 INFO L470 AbstractCegarLoop]: Abstraction has 993 states and 1479 transitions. [2021-10-21 20:00:44,326 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:00:44,326 INFO L276 IsEmpty]: Start isEmpty. Operand 993 states and 1479 transitions. [2021-10-21 20:00:44,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2021-10-21 20:00:44,327 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:00:44,327 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:00:44,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2021-10-21 20:00:44,327 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:00:44,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:00:44,328 INFO L82 PathProgramCache]: Analyzing trace with hash -1438223023, now seen corresponding path program 1 times [2021-10-21 20:00:44,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:00:44,328 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513354655] [2021-10-21 20:00:44,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:00:44,328 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:00:44,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:00:44,515 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 199 trivial. 0 not checked. [2021-10-21 20:00:44,515 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:00:44,515 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513354655] [2021-10-21 20:00:44,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513354655] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:00:44,515 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:00:44,516 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-21 20:00:44,516 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010187407] [2021-10-21 20:00:44,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-21 20:00:44,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:00:44,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-21 20:00:44,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-21 20:00:44,517 INFO L87 Difference]: Start difference. First operand 993 states and 1479 transitions. Second operand has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 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) [2021-10-21 20:00:46,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:00:46,862 INFO L93 Difference]: Finished difference Result 1983 states and 2954 transitions. [2021-10-21 20:00:46,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-21 20:00:46,862 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 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 172 [2021-10-21 20:00:46,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:00:46,863 INFO L225 Difference]: With dead ends: 1983 [2021-10-21 20:00:46,863 INFO L226 Difference]: Without dead ends: 993 [2021-10-21 20:00:46,864 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 32.8ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-21 20:00:46,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 993 states. [2021-10-21 20:00:46,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 993 to 993. [2021-10-21 20:00:46,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 993 states, 992 states have (on average 1.4899193548387097) internal successors, (1478), 992 states have internal predecessors, (1478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:00:46,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 993 states to 993 states and 1478 transitions. [2021-10-21 20:00:46,900 INFO L78 Accepts]: Start accepts. Automaton has 993 states and 1478 transitions. Word has length 172 [2021-10-21 20:00:46,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:00:46,900 INFO L470 AbstractCegarLoop]: Abstraction has 993 states and 1478 transitions. [2021-10-21 20:00:46,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 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) [2021-10-21 20:00:46,900 INFO L276 IsEmpty]: Start isEmpty. Operand 993 states and 1478 transitions. [2021-10-21 20:00:46,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2021-10-21 20:00:46,901 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:00:46,901 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:00:46,902 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2021-10-21 20:00:46,902 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:00:46,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:00:46,902 INFO L82 PathProgramCache]: Analyzing trace with hash 1353645967, now seen corresponding path program 1 times [2021-10-21 20:00:46,902 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:00:46,902 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115913369] [2021-10-21 20:00:46,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:00:46,902 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:00:47,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:00:47,350 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 14 proven. 146 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-10-21 20:00:47,351 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:00:47,351 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115913369] [2021-10-21 20:00:47,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115913369] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:00:47,351 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660873002] [2021-10-21 20:00:47,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:00:47,351 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:00:47,352 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:00:47,355 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:00:47,380 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-21 20:00:47,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:00:47,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 651 conjuncts, 80 conjunts are in the unsatisfiable core [2021-10-21 20:00:47,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:00:47,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 20:00:47,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 20:00:47,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 20:00:47,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 20:00:47,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 20:00:47,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 20:00:48,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 20:00:48,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 20:00:48,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 20:00:48,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 20:00:48,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 11 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 2673 treesize of output 2670 [2021-10-21 20:00:48,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 20:00:48,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 20:00:48,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 20:00:48,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 20:00:48,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 20:00:48,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 20:00:48,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 20:00:48,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 20:00:48,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 20:00:48,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 20:00:48,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 11 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 2715 treesize of output 2654 [2021-10-21 20:00:48,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 20:00:48,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 20:00:48,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 20:00:48,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 20:00:48,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 20:00:48,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 20:01:31,753 WARN L207 SmtUtils]: Spent 43.67 s on a formula simplification. DAG size of input: 229 DAG size of output: 74 [2021-10-21 20:01:31,755 INFO L354 Elim1Store]: treesize reduction 1604, result has 11.3 percent of original size [2021-10-21 20:01:31,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 12 new quantified variables, introduced 20 case distinctions, treesize of input 3168 treesize of output 2616 [2021-10-21 20:01:31,835 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Some non-self update cases but no top-level DER relation [2021-10-21 20:01:31,835 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 20:01:31,836 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-10-21 20:01:31,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914830480] [2021-10-21 20:01:31,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-21 20:01:31,836 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:01:31,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-21 20:01:31,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-10-21 20:01:31,837 INFO L87 Difference]: Start difference. First operand 993 states and 1478 transitions. Second operand has 9 states, 9 states have (on average 16.22222222222222) internal successors, (146), 9 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:01:31,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-21 20:01:31,877 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-21 20:01:32,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:01:32,055 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@55729ad3 at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:81) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.assertCodeBlock(IncrementalHoareTripleChecker.java:356) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.prepareAssertionStackAndAddTransition(IncrementalHoareTripleChecker.java:204) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.checkInternal(IncrementalHoareTripleChecker.java:129) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ProtectiveHoareTripleChecker.checkInternal(ProtectiveHoareTripleChecker.java:61) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.EfficientHoareTripleChecker.checkInternal(EfficientHoareTripleChecker.java:63) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.checkInternal(CachingHoareTripleChecker.java:97) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton$InternalSuccessorComputationHelper.computeSuccWithSolver(AbstractInterpolantAutomaton.java:357) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.addOtherSuccessors(DeterministicInterpolantAutomaton.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:78) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:213) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:216) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:208) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1058) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:960) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:182) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:864) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:778) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:462) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:420) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-10-21 20:01:32,060 INFO L168 Benchmark]: Toolchain (without parser) took 213272.47 ms. Allocated memory was 115.3 MB in the beginning and 184.5 MB in the end (delta: 69.2 MB). Free memory was 79.4 MB in the beginning and 58.2 MB in the end (delta: 21.2 MB). Peak memory consumption was 91.3 MB. Max. memory is 16.1 GB. [2021-10-21 20:01:32,060 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 83.9 MB. Free memory was 57.9 MB in the beginning and 57.8 MB in the end (delta: 30.3 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 20:01:32,061 INFO L168 Benchmark]: CACSL2BoogieTranslator took 851.60 ms. Allocated memory is still 115.3 MB. Free memory was 79.2 MB in the beginning and 70.3 MB in the end (delta: 8.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-21 20:01:32,061 INFO L168 Benchmark]: Boogie Procedure Inliner took 123.17 ms. Allocated memory is still 115.3 MB. Free memory was 70.3 MB in the beginning and 65.7 MB in the end (delta: 4.7 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-21 20:01:32,061 INFO L168 Benchmark]: Boogie Preprocessor took 125.58 ms. Allocated memory is still 115.3 MB. Free memory was 65.7 MB in the beginning and 58.4 MB in the end (delta: 7.3 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-21 20:01:32,061 INFO L168 Benchmark]: RCFGBuilder took 2784.52 ms. Allocated memory is still 115.3 MB. Free memory was 58.4 MB in the beginning and 79.6 MB in the end (delta: -21.3 MB). Peak memory consumption was 36.8 MB. Max. memory is 16.1 GB. [2021-10-21 20:01:32,062 INFO L168 Benchmark]: TraceAbstraction took 209378.98 ms. Allocated memory was 115.3 MB in the beginning and 184.5 MB in the end (delta: 69.2 MB). Free memory was 78.9 MB in the beginning and 58.2 MB in the end (delta: 20.7 MB). Peak memory consumption was 90.3 MB. Max. memory is 16.1 GB. [2021-10-21 20:01:32,064 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 83.9 MB. Free memory was 57.9 MB in the beginning and 57.8 MB in the end (delta: 30.3 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 851.60 ms. Allocated memory is still 115.3 MB. Free memory was 79.2 MB in the beginning and 70.3 MB in the end (delta: 8.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 123.17 ms. Allocated memory is still 115.3 MB. Free memory was 70.3 MB in the beginning and 65.7 MB in the end (delta: 4.7 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 125.58 ms. Allocated memory is still 115.3 MB. Free memory was 65.7 MB in the beginning and 58.4 MB in the end (delta: 7.3 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * RCFGBuilder took 2784.52 ms. Allocated memory is still 115.3 MB. Free memory was 58.4 MB in the beginning and 79.6 MB in the end (delta: -21.3 MB). Peak memory consumption was 36.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 209378.98 ms. Allocated memory was 115.3 MB in the beginning and 184.5 MB in the end (delta: 69.2 MB). Free memory was 78.9 MB in the beginning and 58.2 MB in the end (delta: 20.7 MB). Peak memory consumption was 90.3 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@55729ad3 de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@55729ad3: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:81) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-10-21 20:01:32,119 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-dev-e943c26 [2021-10-21 20:01:34,524 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-21 20:01:34,527 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-21 20:01:34,578 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-21 20:01:34,579 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-21 20:01:34,583 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-21 20:01:34,585 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-21 20:01:34,591 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-21 20:01:34,594 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-21 20:01:34,599 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-21 20:01:34,601 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-21 20:01:34,602 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-21 20:01:34,603 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-21 20:01:34,605 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-21 20:01:34,607 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-21 20:01:34,611 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-21 20:01:34,613 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-21 20:01:34,614 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-21 20:01:34,622 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-21 20:01:34,631 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-21 20:01:34,633 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-21 20:01:34,635 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-21 20:01:34,639 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-21 20:01:34,641 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-21 20:01:34,651 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-21 20:01:34,652 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-21 20:01:34,652 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-21 20:01:34,655 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-21 20:01:34,655 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-21 20:01:34,656 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-21 20:01:34,657 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-21 20:01:34,658 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-21 20:01:34,660 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-21 20:01:34,661 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-21 20:01:34,662 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-21 20:01:34,662 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-21 20:01:34,663 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-21 20:01:34,663 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-21 20:01:34,664 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-21 20:01:34,665 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-21 20:01:34,666 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-21 20:01:34,671 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-10-21 20:01:34,714 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-21 20:01:34,714 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-21 20:01:34,715 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-21 20:01:34,715 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-21 20:01:34,717 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-21 20:01:34,717 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-21 20:01:34,717 INFO L138 SettingsManager]: * Use SBE=true [2021-10-21 20:01:34,718 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-21 20:01:34,718 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-21 20:01:34,718 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-21 20:01:34,719 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-21 20:01:34,720 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-21 20:01:34,720 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-21 20:01:34,720 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-21 20:01:34,721 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-21 20:01:34,721 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-21 20:01:34,721 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-21 20:01:34,721 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-21 20:01:34,722 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-21 20:01:34,722 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-21 20:01:34,722 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-21 20:01:34,722 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-21 20:01:34,723 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-21 20:01:34,723 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 20:01:34,723 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-21 20:01:34,724 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-21 20:01:34,724 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-21 20:01:34,724 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-10-21 20:01:34,725 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-21 20:01:34,725 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-21 20:01:34,725 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-21 20:01:34,725 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-21 20:01:34,726 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-21 20:01:34,726 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-21 20:01:34,726 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0b79f6e49ac032444452c6675a01007f08f3b698920d88701561807a0669494d [2021-10-21 20:01:35,088 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-21 20:01:35,125 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-21 20:01:35,127 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-21 20:01:35,129 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-21 20:01:35,129 INFO L275 PluginConnector]: CDTParser initialized [2021-10-21 20:01:35,130 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/../../sv-benchmarks/c/openssl/s3_srvr.blast.16.i.cil-1.c [2021-10-21 20:01:35,207 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/data/8d064dee6/194d4af026c7452cb884d5f304256fed/FLAGd5b7d0dae [2021-10-21 20:01:35,963 INFO L306 CDTParser]: Found 1 translation units. [2021-10-21 20:01:35,964 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/sv-benchmarks/c/openssl/s3_srvr.blast.16.i.cil-1.c [2021-10-21 20:01:35,998 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/data/8d064dee6/194d4af026c7452cb884d5f304256fed/FLAGd5b7d0dae [2021-10-21 20:01:36,146 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/data/8d064dee6/194d4af026c7452cb884d5f304256fed [2021-10-21 20:01:36,148 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-21 20:01:36,150 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-21 20:01:36,155 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-21 20:01:36,155 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-21 20:01:36,159 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-21 20:01:36,160 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 08:01:36" (1/1) ... [2021-10-21 20:01:36,162 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c7849c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:01:36, skipping insertion in model container [2021-10-21 20:01:36,162 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 08:01:36" (1/1) ... [2021-10-21 20:01:36,170 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-21 20:01:36,258 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-21 20:01:36,762 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_d77c1f3f-22e9-4b40-b4e2-d2f354896745/sv-benchmarks/c/openssl/s3_srvr.blast.16.i.cil-1.c[77378,77391] [2021-10-21 20:01:36,787 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 20:01:36,817 INFO L203 MainTranslator]: Completed pre-run [2021-10-21 20:01:37,020 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_d77c1f3f-22e9-4b40-b4e2-d2f354896745/sv-benchmarks/c/openssl/s3_srvr.blast.16.i.cil-1.c[77378,77391] [2021-10-21 20:01:37,030 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 20:01:37,051 INFO L208 MainTranslator]: Completed translation [2021-10-21 20:01:37,052 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:01:37 WrapperNode [2021-10-21 20:01:37,052 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-21 20:01:37,054 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-21 20:01:37,054 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-21 20:01:37,054 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-21 20:01:37,062 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:01:37" (1/1) ... [2021-10-21 20:01:37,113 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:01:37" (1/1) ... [2021-10-21 20:01:37,174 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-21 20:01:37,175 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-21 20:01:37,175 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-21 20:01:37,176 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-21 20:01:37,184 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:01:37" (1/1) ... [2021-10-21 20:01:37,184 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:01:37" (1/1) ... [2021-10-21 20:01:37,194 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:01:37" (1/1) ... [2021-10-21 20:01:37,194 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:01:37" (1/1) ... [2021-10-21 20:01:37,257 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:01:37" (1/1) ... [2021-10-21 20:01:37,265 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:01:37" (1/1) ... [2021-10-21 20:01:37,268 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:01:37" (1/1) ... [2021-10-21 20:01:37,274 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-21 20:01:37,275 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-21 20:01:37,275 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-21 20:01:37,276 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-21 20:01:37,276 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:01:37" (1/1) ... [2021-10-21 20:01:37,286 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 20:01:37,299 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:01:37,321 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-21 20:01:37,334 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-21 20:01:37,371 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-21 20:01:37,372 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-21 20:01:37,372 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-21 20:01:37,372 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-21 20:01:37,372 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-21 20:01:37,372 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-21 20:01:37,373 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-21 20:01:37,373 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-21 20:01:37,373 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-21 20:01:37,607 WARN L805 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-10-21 20:01:41,933 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2021-10-21 20:01:41,933 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2021-10-21 20:01:41,949 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-21 20:01:41,950 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-21 20:01:41,952 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 08:01:41 BoogieIcfgContainer [2021-10-21 20:01:41,953 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-21 20:01:41,955 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-21 20:01:41,955 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-21 20:01:41,958 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-21 20:01:41,959 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.10 08:01:36" (1/3) ... [2021-10-21 20:01:41,960 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41543e6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 08:01:41, skipping insertion in model container [2021-10-21 20:01:41,960 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:01:37" (2/3) ... [2021-10-21 20:01:41,961 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41543e6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 08:01:41, skipping insertion in model container [2021-10-21 20:01:41,961 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 08:01:41" (3/3) ... [2021-10-21 20:01:41,963 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_srvr.blast.16.i.cil-1.c [2021-10-21 20:01:41,969 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-21 20:01:41,970 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-21 20:01:42,041 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-21 20:01:42,049 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 [2021-10-21 20:01:42,049 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-21 20:01:42,083 INFO L276 IsEmpty]: Start isEmpty. Operand has 158 states, 156 states have (on average 1.7307692307692308) internal successors, (270), 157 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:01:42,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-10-21 20:01:42,093 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:01:42,094 INFO L512 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] [2021-10-21 20:01:42,094 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:01:42,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:01:42,099 INFO L82 PathProgramCache]: Analyzing trace with hash -1590777092, now seen corresponding path program 1 times [2021-10-21 20:01:42,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 20:01:42,114 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2087411862] [2021-10-21 20:01:42,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:01:42,115 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 20:01:42,115 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 20:01:42,118 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 20:01:42,151 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-21 20:01:42,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:01:42,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-21 20:01:42,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:01:42,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-21 20:01:42,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-21 20:01:42,772 INFO L354 Elim1Store]: treesize reduction 96, result has 16.5 percent of original size [2021-10-21 20:01:42,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 22 [2021-10-21 20:01:42,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 20:01:42,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 20:01:42,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 20:01:42,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 22 [2021-10-21 20:01:42,917 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-10-21 20:01:42,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-10-21 20:01:42,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 20:01:42,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-10-21 20:01:42,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 25 [2021-10-21 20:01:42,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2021-10-21 20:01:43,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:01:43,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 20:01:43,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:01:43,730 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 20:01:43,730 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2087411862] [2021-10-21 20:01:43,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2087411862] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-21 20:01:43,731 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:01:43,732 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-10-21 20:01:43,734 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064775606] [2021-10-21 20:01:43,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-21 20:01:43,740 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 20:01:43,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-21 20:01:43,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-10-21 20:01:43,760 INFO L87 Difference]: Start difference. First operand has 158 states, 156 states have (on average 1.7307692307692308) internal successors, (270), 157 states have internal predecessors, (270), 0 states have call successors, (0), 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 8 states, 8 states have (on average 6.5) internal successors, (52), 8 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) [2021-10-21 20:01:54,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:01:54,224 INFO L93 Difference]: Finished difference Result 317 states and 539 transitions. [2021-10-21 20:01:54,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-21 20:01:54,228 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 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 45 [2021-10-21 20:01:54,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:01:54,239 INFO L225 Difference]: With dead ends: 317 [2021-10-21 20:01:54,239 INFO L226 Difference]: Without dead ends: 145 [2021-10-21 20:01:54,242 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 354.1ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-10-21 20:01:54,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-10-21 20:01:54,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2021-10-21 20:01:54,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.5625) internal successors, (225), 144 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:01:54,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 225 transitions. [2021-10-21 20:01:54,305 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 225 transitions. Word has length 45 [2021-10-21 20:01:54,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:01:54,306 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 225 transitions. [2021-10-21 20:01:54,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 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) [2021-10-21 20:01:54,307 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 225 transitions. [2021-10-21 20:01:54,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-10-21 20:01:54,314 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:01:54,314 INFO L512 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] [2021-10-21 20:01:54,339 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-21 20:01:54,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 20:01:54,539 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:01:54,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:01:54,540 INFO L82 PathProgramCache]: Analyzing trace with hash 1806796926, now seen corresponding path program 1 times [2021-10-21 20:01:54,541 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 20:01:54,541 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [739394822] [2021-10-21 20:01:54,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:01:54,541 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 20:01:54,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 20:01:54,544 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 20:01:54,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-21 20:01:54,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:01:54,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-21 20:01:54,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:01:54,909 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-10-21 20:01:54,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2021-10-21 20:01:54,975 INFO L354 Elim1Store]: treesize reduction 41, result has 18.0 percent of original size [2021-10-21 20:01:54,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 24 [2021-10-21 20:01:55,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-10-21 20:01:55,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:01:55,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 20:01:55,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:01:55,480 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 20:01:55,480 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [739394822] [2021-10-21 20:01:55,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [739394822] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-21 20:01:55,480 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:01:55,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-10-21 20:01:55,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069099065] [2021-10-21 20:01:55,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 20:01:55,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 20:01:55,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 20:01:55,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 20:01:55,483 INFO L87 Difference]: Start difference. First operand 145 states and 225 transitions. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:01:59,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:01:59,121 INFO L93 Difference]: Finished difference Result 308 states and 478 transitions. [2021-10-21 20:01:59,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 20:01:59,123 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-10-21 20:01:59,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:01:59,125 INFO L225 Difference]: With dead ends: 308 [2021-10-21 20:01:59,126 INFO L226 Difference]: Without dead ends: 173 [2021-10-21 20:01:59,127 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 50.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 20:01:59,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-10-21 20:01:59,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 156. [2021-10-21 20:01:59,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 1.5741935483870968) internal successors, (244), 155 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:01:59,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 244 transitions. [2021-10-21 20:01:59,154 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 244 transitions. Word has length 45 [2021-10-21 20:01:59,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:01:59,156 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 244 transitions. [2021-10-21 20:01:59,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:01:59,157 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 244 transitions. [2021-10-21 20:01:59,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-10-21 20:01:59,161 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:01:59,162 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:01:59,178 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-10-21 20:01:59,370 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 20:01:59,371 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:01:59,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:01:59,372 INFO L82 PathProgramCache]: Analyzing trace with hash 774668882, now seen corresponding path program 1 times [2021-10-21 20:01:59,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 20:01:59,373 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1808412783] [2021-10-21 20:01:59,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:01:59,373 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 20:01:59,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 20:01:59,374 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 20:01:59,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-21 20:01:59,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:01:59,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-21 20:01:59,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:01:59,777 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-10-21 20:01:59,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2021-10-21 20:01:59,860 INFO L354 Elim1Store]: treesize reduction 41, result has 18.0 percent of original size [2021-10-21 20:01:59,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 24 [2021-10-21 20:01:59,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-10-21 20:02:00,132 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:02:00,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 20:02:00,484 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:02:00,484 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 20:02:00,485 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1808412783] [2021-10-21 20:02:00,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1808412783] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-21 20:02:00,485 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:02:00,485 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-21 20:02:00,485 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142180122] [2021-10-21 20:02:00,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 20:02:00,486 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 20:02:00,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 20:02:00,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-21 20:02:00,487 INFO L87 Difference]: Start difference. First operand 156 states and 244 transitions. Second operand has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:02:08,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:02:08,242 INFO L93 Difference]: Finished difference Result 433 states and 675 transitions. [2021-10-21 20:02:08,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-21 20:02:08,243 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-10-21 20:02:08,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:02:08,246 INFO L225 Difference]: With dead ends: 433 [2021-10-21 20:02:08,246 INFO L226 Difference]: Without dead ends: 298 [2021-10-21 20:02:08,247 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 109 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 138.6ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-21 20:02:08,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2021-10-21 20:02:08,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 172. [2021-10-21 20:02:08,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 1.5730994152046784) internal successors, (269), 171 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:02:08,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 269 transitions. [2021-10-21 20:02:08,266 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 269 transitions. Word has length 58 [2021-10-21 20:02:08,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:02:08,266 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 269 transitions. [2021-10-21 20:02:08,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:02:08,267 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 269 transitions. [2021-10-21 20:02:08,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-10-21 20:02:08,269 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:02:08,269 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:02:08,287 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-21 20:02:08,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 20:02:08,483 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:02:08,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:02:08,483 INFO L82 PathProgramCache]: Analyzing trace with hash -713896793, now seen corresponding path program 1 times [2021-10-21 20:02:08,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 20:02:08,484 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [163448986] [2021-10-21 20:02:08,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:02:08,484 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 20:02:08,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 20:02:08,499 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 20:02:08,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-21 20:02:08,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:02:08,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-21 20:02:08,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:02:08,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 73 [2021-10-21 20:02:08,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 49 [2021-10-21 20:02:10,161 INFO L354 Elim1Store]: treesize reduction 25, result has 45.7 percent of original size [2021-10-21 20:02:10,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 31 [2021-10-21 20:02:10,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-10-21 20:02:10,413 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:02:10,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 20:02:10,662 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:02:10,662 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 20:02:10,662 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [163448986] [2021-10-21 20:02:10,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [163448986] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-21 20:02:10,663 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:02:10,663 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-10-21 20:02:10,663 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955346503] [2021-10-21 20:02:10,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 20:02:10,664 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 20:02:10,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 20:02:10,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 20:02:10,665 INFO L87 Difference]: Start difference. First operand 172 states and 269 transitions. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:02:14,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:02:14,546 INFO L93 Difference]: Finished difference Result 352 states and 550 transitions. [2021-10-21 20:02:14,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 20:02:14,549 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-10-21 20:02:14,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:02:14,551 INFO L225 Difference]: With dead ends: 352 [2021-10-21 20:02:14,551 INFO L226 Difference]: Without dead ends: 201 [2021-10-21 20:02:14,552 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 44.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 20:02:14,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-10-21 20:02:14,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 188. [2021-10-21 20:02:14,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 1.5775401069518717) internal successors, (295), 187 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:02:14,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 295 transitions. [2021-10-21 20:02:14,565 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 295 transitions. Word has length 59 [2021-10-21 20:02:14,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:02:14,566 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 295 transitions. [2021-10-21 20:02:14,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:02:14,566 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 295 transitions. [2021-10-21 20:02:14,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-10-21 20:02:14,568 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:02:14,568 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:02:14,584 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-21 20:02:14,781 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 20:02:14,781 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:02:14,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:02:14,782 INFO L82 PathProgramCache]: Analyzing trace with hash 320889874, now seen corresponding path program 1 times [2021-10-21 20:02:14,782 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 20:02:14,782 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [990187697] [2021-10-21 20:02:14,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:02:14,783 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 20:02:14,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 20:02:14,784 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 20:02:14,788 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-21 20:02:15,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:02:15,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-21 20:02:15,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:02:15,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-21 20:02:15,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-10-21 20:02:15,484 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:02:15,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 20:02:15,829 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:02:15,830 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 20:02:15,830 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [990187697] [2021-10-21 20:02:15,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [990187697] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-21 20:02:15,830 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:02:15,831 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-21 20:02:15,831 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626358614] [2021-10-21 20:02:15,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 20:02:15,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 20:02:15,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 20:02:15,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-21 20:02:15,832 INFO L87 Difference]: Start difference. First operand 188 states and 295 transitions. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:02:25,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:02:25,366 INFO L93 Difference]: Finished difference Result 593 states and 932 transitions. [2021-10-21 20:02:25,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-21 20:02:25,367 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-10-21 20:02:25,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:02:25,370 INFO L225 Difference]: With dead ends: 593 [2021-10-21 20:02:25,370 INFO L226 Difference]: Without dead ends: 426 [2021-10-21 20:02:25,371 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 95.3ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-21 20:02:25,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2021-10-21 20:02:25,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 228. [2021-10-21 20:02:25,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 1.6167400881057268) internal successors, (367), 227 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:02:25,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 367 transitions. [2021-10-21 20:02:25,385 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 367 transitions. Word has length 59 [2021-10-21 20:02:25,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:02:25,386 INFO L470 AbstractCegarLoop]: Abstraction has 228 states and 367 transitions. [2021-10-21 20:02:25,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:02:25,386 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 367 transitions. [2021-10-21 20:02:25,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-10-21 20:02:25,387 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:02:25,388 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:02:25,413 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-21 20:02:25,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 20:02:25,604 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:02:25,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:02:25,604 INFO L82 PathProgramCache]: Analyzing trace with hash -1824364827, now seen corresponding path program 1 times [2021-10-21 20:02:25,605 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 20:02:25,605 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [684018801] [2021-10-21 20:02:25,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:02:25,605 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 20:02:25,605 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 20:02:25,606 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 20:02:25,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-21 20:02:25,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:02:25,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-21 20:02:25,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:02:25,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-21 20:02:26,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-10-21 20:02:26,303 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:02:26,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 20:02:26,653 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:02:26,654 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 20:02:26,654 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [684018801] [2021-10-21 20:02:26,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [684018801] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-21 20:02:26,655 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:02:26,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-21 20:02:26,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519393637] [2021-10-21 20:02:26,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 20:02:26,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 20:02:26,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 20:02:26,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-21 20:02:26,658 INFO L87 Difference]: Start difference. First operand 228 states and 367 transitions. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:02:34,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:02:34,211 INFO L93 Difference]: Finished difference Result 648 states and 1037 transitions. [2021-10-21 20:02:34,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-21 20:02:34,212 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-10-21 20:02:34,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:02:34,215 INFO L225 Difference]: With dead ends: 648 [2021-10-21 20:02:34,216 INFO L226 Difference]: Without dead ends: 441 [2021-10-21 20:02:34,216 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 118.7ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-21 20:02:34,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2021-10-21 20:02:34,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 252. [2021-10-21 20:02:34,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 1.649402390438247) internal successors, (414), 251 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:02:34,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 414 transitions. [2021-10-21 20:02:34,234 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 414 transitions. Word has length 60 [2021-10-21 20:02:34,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:02:34,235 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 414 transitions. [2021-10-21 20:02:34,235 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:02:34,236 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 414 transitions. [2021-10-21 20:02:34,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-10-21 20:02:34,237 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:02:34,238 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:02:34,255 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-21 20:02:34,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 20:02:34,451 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:02:34,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:02:34,452 INFO L82 PathProgramCache]: Analyzing trace with hash -616452519, now seen corresponding path program 1 times [2021-10-21 20:02:34,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 20:02:34,453 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [270471532] [2021-10-21 20:02:34,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:02:34,453 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 20:02:34,453 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 20:02:34,454 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 20:02:34,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-21 20:02:34,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:02:34,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-21 20:02:34,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:02:34,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-21 20:02:35,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-10-21 20:02:35,287 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:02:35,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 20:02:35,756 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:02:35,757 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 20:02:35,757 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [270471532] [2021-10-21 20:02:35,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [270471532] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-21 20:02:35,757 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:02:35,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-21 20:02:35,758 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676492723] [2021-10-21 20:02:35,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 20:02:35,758 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 20:02:35,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 20:02:35,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-21 20:02:35,759 INFO L87 Difference]: Start difference. First operand 252 states and 414 transitions. Second operand has 6 states, 6 states have (on average 19.333333333333332) internal successors, (116), 6 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:02:45,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:02:45,447 INFO L93 Difference]: Finished difference Result 745 states and 1218 transitions. [2021-10-21 20:02:45,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-21 20:02:45,450 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 19.333333333333332) internal successors, (116), 6 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 88 [2021-10-21 20:02:45,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:02:45,454 INFO L225 Difference]: With dead ends: 745 [2021-10-21 20:02:45,455 INFO L226 Difference]: Without dead ends: 514 [2021-10-21 20:02:45,456 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 109.6ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-21 20:02:45,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2021-10-21 20:02:45,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 316. [2021-10-21 20:02:45,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 315 states have (on average 1.6761904761904762) internal successors, (528), 315 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:02:45,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 528 transitions. [2021-10-21 20:02:45,473 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 528 transitions. Word has length 88 [2021-10-21 20:02:45,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:02:45,474 INFO L470 AbstractCegarLoop]: Abstraction has 316 states and 528 transitions. [2021-10-21 20:02:45,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.333333333333332) internal successors, (116), 6 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:02:45,474 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 528 transitions. [2021-10-21 20:02:45,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-10-21 20:02:45,476 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:02:45,476 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:02:45,505 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-10-21 20:02:45,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 20:02:45,690 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:02:45,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:02:45,691 INFO L82 PathProgramCache]: Analyzing trace with hash -150069863, now seen corresponding path program 1 times [2021-10-21 20:02:45,691 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 20:02:45,691 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [354861089] [2021-10-21 20:02:45,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:02:45,692 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 20:02:45,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 20:02:45,693 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 20:02:45,702 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-21 20:02:46,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:02:46,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-21 20:02:46,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:02:46,315 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-10-21 20:02:46,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2021-10-21 20:02:46,378 INFO L354 Elim1Store]: treesize reduction 41, result has 18.0 percent of original size [2021-10-21 20:02:46,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 24 [2021-10-21 20:02:46,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-10-21 20:02:46,738 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-10-21 20:02:46,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 20:02:47,183 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-10-21 20:02:47,183 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 20:02:47,183 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [354861089] [2021-10-21 20:02:47,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [354861089] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-21 20:02:47,183 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:02:47,183 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-21 20:02:47,184 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888026287] [2021-10-21 20:02:47,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 20:02:47,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 20:02:47,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 20:02:47,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-21 20:02:47,185 INFO L87 Difference]: Start difference. First operand 316 states and 528 transitions. Second operand has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 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) [2021-10-21 20:02:52,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:02:52,969 INFO L93 Difference]: Finished difference Result 711 states and 1167 transitions. [2021-10-21 20:02:52,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-21 20:02:52,970 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 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 88 [2021-10-21 20:02:52,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:02:52,974 INFO L225 Difference]: With dead ends: 711 [2021-10-21 20:02:52,974 INFO L226 Difference]: Without dead ends: 416 [2021-10-21 20:02:52,975 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 169 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 128.4ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-21 20:02:52,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2021-10-21 20:02:52,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 316. [2021-10-21 20:02:52,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 315 states have (on average 1.6603174603174604) internal successors, (523), 315 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:02:52,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 523 transitions. [2021-10-21 20:02:52,990 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 523 transitions. Word has length 88 [2021-10-21 20:02:52,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:02:52,990 INFO L470 AbstractCegarLoop]: Abstraction has 316 states and 523 transitions. [2021-10-21 20:02:52,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 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) [2021-10-21 20:02:52,991 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 523 transitions. [2021-10-21 20:02:52,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-10-21 20:02:52,992 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:02:52,993 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:02:53,016 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-10-21 20:02:53,206 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 20:02:53,206 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:02:53,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:02:53,206 INFO L82 PathProgramCache]: Analyzing trace with hash -1518838174, now seen corresponding path program 1 times [2021-10-21 20:02:53,207 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 20:02:53,207 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [537745221] [2021-10-21 20:02:53,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:02:53,207 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 20:02:53,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 20:02:53,208 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 20:02:53,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-10-21 20:02:53,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:02:53,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-21 20:02:53,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:02:53,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-21 20:02:53,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-10-21 20:02:54,005 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:02:54,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 20:02:54,476 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:02:54,477 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 20:02:54,477 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [537745221] [2021-10-21 20:02:54,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [537745221] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-21 20:02:54,477 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:02:54,477 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-21 20:02:54,478 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52776292] [2021-10-21 20:02:54,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 20:02:54,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 20:02:54,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 20:02:54,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-21 20:02:54,479 INFO L87 Difference]: Start difference. First operand 316 states and 523 transitions. Second operand has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:03:00,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:03:00,161 INFO L93 Difference]: Finished difference Result 835 states and 1363 transitions. [2021-10-21 20:03:00,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-21 20:03:00,161 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 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 94 [2021-10-21 20:03:00,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:03:00,165 INFO L225 Difference]: With dead ends: 835 [2021-10-21 20:03:00,165 INFO L226 Difference]: Without dead ends: 540 [2021-10-21 20:03:00,166 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 93.5ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-21 20:03:00,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2021-10-21 20:03:00,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 353. [2021-10-21 20:03:00,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 352 states have (on average 1.6676136363636365) internal successors, (587), 352 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:03:00,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 587 transitions. [2021-10-21 20:03:00,180 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 587 transitions. Word has length 94 [2021-10-21 20:03:00,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:03:00,181 INFO L470 AbstractCegarLoop]: Abstraction has 353 states and 587 transitions. [2021-10-21 20:03:00,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:03:00,181 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 587 transitions. [2021-10-21 20:03:00,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-10-21 20:03:00,183 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:03:00,183 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:03:00,211 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-10-21 20:03:00,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 20:03:00,399 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:03:00,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:03:00,400 INFO L82 PathProgramCache]: Analyzing trace with hash 210219535, now seen corresponding path program 1 times [2021-10-21 20:03:00,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 20:03:00,400 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1009862548] [2021-10-21 20:03:00,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:03:00,400 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 20:03:00,400 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 20:03:00,401 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 20:03:00,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-10-21 20:03:00,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:03:00,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-21 20:03:00,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:03:00,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-21 20:03:01,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-10-21 20:03:01,340 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:03:01,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 20:03:01,766 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:03:01,766 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 20:03:01,767 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1009862548] [2021-10-21 20:03:01,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1009862548] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-21 20:03:01,767 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:03:01,767 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-21 20:03:01,768 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300484930] [2021-10-21 20:03:01,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 20:03:01,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 20:03:01,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 20:03:01,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-21 20:03:01,769 INFO L87 Difference]: Start difference. First operand 353 states and 587 transitions. Second operand has 6 states, 6 states have (on average 21.5) internal successors, (129), 6 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:03:08,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:03:08,044 INFO L93 Difference]: Finished difference Result 866 states and 1416 transitions. [2021-10-21 20:03:08,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-21 20:03:08,045 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.5) internal successors, (129), 6 states have internal predecessors, (129), 0 states have call successors, (0), 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 95 [2021-10-21 20:03:08,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:03:08,049 INFO L225 Difference]: With dead ends: 866 [2021-10-21 20:03:08,049 INFO L226 Difference]: Without dead ends: 534 [2021-10-21 20:03:08,050 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 99.1ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-21 20:03:08,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2021-10-21 20:03:08,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 353. [2021-10-21 20:03:08,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 352 states have (on average 1.6619318181818181) internal successors, (585), 352 states have internal predecessors, (585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:03:08,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 585 transitions. [2021-10-21 20:03:08,066 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 585 transitions. Word has length 95 [2021-10-21 20:03:08,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:03:08,067 INFO L470 AbstractCegarLoop]: Abstraction has 353 states and 585 transitions. [2021-10-21 20:03:08,067 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.5) internal successors, (129), 6 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:03:08,067 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 585 transitions. [2021-10-21 20:03:08,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-10-21 20:03:08,068 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:03:08,069 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:03:08,084 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-10-21 20:03:08,278 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 20:03:08,279 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:03:08,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:03:08,279 INFO L82 PathProgramCache]: Analyzing trace with hash -731629310, now seen corresponding path program 1 times [2021-10-21 20:03:08,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 20:03:08,280 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1991148772] [2021-10-21 20:03:08,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:03:08,280 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 20:03:08,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 20:03:08,281 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 20:03:08,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-10-21 20:03:08,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:03:08,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-21 20:03:08,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:03:09,013 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-10-21 20:03:09,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2021-10-21 20:03:09,074 INFO L354 Elim1Store]: treesize reduction 41, result has 18.0 percent of original size [2021-10-21 20:03:09,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 24 [2021-10-21 20:03:09,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-10-21 20:03:09,422 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-10-21 20:03:09,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 20:03:09,867 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-10-21 20:03:09,868 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 20:03:09,868 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1991148772] [2021-10-21 20:03:09,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1991148772] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-21 20:03:09,868 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:03:09,868 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-21 20:03:09,868 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588520534] [2021-10-21 20:03:09,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 20:03:09,869 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 20:03:09,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 20:03:09,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-21 20:03:09,870 INFO L87 Difference]: Start difference. First operand 353 states and 585 transitions. Second operand has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:03:16,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:03:16,061 INFO L93 Difference]: Finished difference Result 783 states and 1280 transitions. [2021-10-21 20:03:16,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-21 20:03:16,061 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2021-10-21 20:03:16,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:03:16,064 INFO L225 Difference]: With dead ends: 783 [2021-10-21 20:03:16,065 INFO L226 Difference]: Without dead ends: 451 [2021-10-21 20:03:16,066 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 195 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 110.5ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-21 20:03:16,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2021-10-21 20:03:16,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 353. [2021-10-21 20:03:16,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 352 states have (on average 1.6420454545454546) internal successors, (578), 352 states have internal predecessors, (578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:03:16,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 578 transitions. [2021-10-21 20:03:16,080 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 578 transitions. Word has length 101 [2021-10-21 20:03:16,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:03:16,080 INFO L470 AbstractCegarLoop]: Abstraction has 353 states and 578 transitions. [2021-10-21 20:03:16,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:03:16,080 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 578 transitions. [2021-10-21 20:03:16,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-10-21 20:03:16,082 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:03:16,082 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:03:16,096 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-10-21 20:03:16,294 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 20:03:16,295 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:03:16,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:03:16,295 INFO L82 PathProgramCache]: Analyzing trace with hash -2061689706, now seen corresponding path program 1 times [2021-10-21 20:03:16,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 20:03:16,296 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1751420607] [2021-10-21 20:03:16,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:03:16,296 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 20:03:16,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 20:03:16,297 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 20:03:16,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-10-21 20:03:16,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:03:17,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-21 20:03:17,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:03:17,055 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-10-21 20:03:17,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2021-10-21 20:03:17,111 INFO L354 Elim1Store]: treesize reduction 41, result has 18.0 percent of original size [2021-10-21 20:03:17,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 24 [2021-10-21 20:03:17,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-10-21 20:03:17,474 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-10-21 20:03:17,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 20:03:17,936 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-10-21 20:03:17,936 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 20:03:17,936 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1751420607] [2021-10-21 20:03:17,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1751420607] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-21 20:03:17,937 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:03:17,937 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-21 20:03:17,937 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292036802] [2021-10-21 20:03:17,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 20:03:17,937 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 20:03:17,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 20:03:17,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-21 20:03:17,938 INFO L87 Difference]: Start difference. First operand 353 states and 578 transitions. Second operand has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:03:24,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:03:24,398 INFO L93 Difference]: Finished difference Result 783 states and 1267 transitions. [2021-10-21 20:03:24,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-21 20:03:24,399 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2021-10-21 20:03:24,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:03:24,402 INFO L225 Difference]: With dead ends: 783 [2021-10-21 20:03:24,402 INFO L226 Difference]: Without dead ends: 451 [2021-10-21 20:03:24,403 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 195 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 119.5ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-21 20:03:24,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2021-10-21 20:03:24,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 353. [2021-10-21 20:03:24,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 352 states have (on average 1.6221590909090908) internal successors, (571), 352 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:03:24,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 571 transitions. [2021-10-21 20:03:24,417 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 571 transitions. Word has length 101 [2021-10-21 20:03:24,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:03:24,417 INFO L470 AbstractCegarLoop]: Abstraction has 353 states and 571 transitions. [2021-10-21 20:03:24,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:03:24,418 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 571 transitions. [2021-10-21 20:03:24,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-10-21 20:03:24,419 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:03:24,420 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:03:24,436 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2021-10-21 20:03:24,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 20:03:24,636 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:03:24,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:03:24,637 INFO L82 PathProgramCache]: Analyzing trace with hash 952051926, now seen corresponding path program 1 times [2021-10-21 20:03:24,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 20:03:24,638 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [274819968] [2021-10-21 20:03:24,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:03:24,638 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 20:03:24,638 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 20:03:24,639 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 20:03:24,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-10-21 20:03:25,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:03:25,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-21 20:03:25,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:03:25,564 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-10-21 20:03:25,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2021-10-21 20:03:25,634 INFO L354 Elim1Store]: treesize reduction 41, result has 18.0 percent of original size [2021-10-21 20:03:25,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 24 [2021-10-21 20:03:25,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-10-21 20:03:26,013 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-10-21 20:03:26,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 20:03:26,487 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-10-21 20:03:26,487 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 20:03:26,488 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [274819968] [2021-10-21 20:03:26,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [274819968] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-21 20:03:26,488 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:03:26,488 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-21 20:03:26,488 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774034785] [2021-10-21 20:03:26,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 20:03:26,489 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 20:03:26,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 20:03:26,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-21 20:03:26,490 INFO L87 Difference]: Start difference. First operand 353 states and 571 transitions. Second operand has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 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) [2021-10-21 20:03:34,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:03:34,878 INFO L93 Difference]: Finished difference Result 783 states and 1254 transitions. [2021-10-21 20:03:34,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-21 20:03:34,878 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 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 102 [2021-10-21 20:03:34,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:03:34,881 INFO L225 Difference]: With dead ends: 783 [2021-10-21 20:03:34,881 INFO L226 Difference]: Without dead ends: 451 [2021-10-21 20:03:34,882 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 197 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 110.8ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-21 20:03:34,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2021-10-21 20:03:34,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 353. [2021-10-21 20:03:34,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 352 states have (on average 1.6022727272727273) internal successors, (564), 352 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:03:34,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 564 transitions. [2021-10-21 20:03:34,896 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 564 transitions. Word has length 102 [2021-10-21 20:03:34,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:03:34,897 INFO L470 AbstractCegarLoop]: Abstraction has 353 states and 564 transitions. [2021-10-21 20:03:34,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 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) [2021-10-21 20:03:34,897 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 564 transitions. [2021-10-21 20:03:34,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-10-21 20:03:34,898 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:03:34,899 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:03:34,924 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-10-21 20:03:35,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 20:03:35,115 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:03:35,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:03:35,115 INFO L82 PathProgramCache]: Analyzing trace with hash 313235863, now seen corresponding path program 1 times [2021-10-21 20:03:35,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 20:03:35,116 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [888623297] [2021-10-21 20:03:35,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:03:35,116 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 20:03:35,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 20:03:35,117 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 20:03:35,117 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-10-21 20:03:35,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:03:35,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-21 20:03:35,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:03:35,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-21 20:03:36,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-10-21 20:03:36,153 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:03:36,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 20:03:36,648 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:03:36,648 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 20:03:36,648 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [888623297] [2021-10-21 20:03:36,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [888623297] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-21 20:03:36,649 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:03:36,649 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-21 20:03:36,649 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781740316] [2021-10-21 20:03:36,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 20:03:36,650 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 20:03:36,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 20:03:36,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-21 20:03:36,651 INFO L87 Difference]: Start difference. First operand 353 states and 564 transitions. Second operand has 6 states, 6 states have (on average 23.5) internal successors, (141), 6 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:03:43,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:03:43,658 INFO L93 Difference]: Finished difference Result 904 states and 1432 transitions. [2021-10-21 20:03:43,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-21 20:03:43,659 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 23.5) internal successors, (141), 6 states have internal predecessors, (141), 0 states have call successors, (0), 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 102 [2021-10-21 20:03:43,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:03:43,662 INFO L225 Difference]: With dead ends: 904 [2021-10-21 20:03:43,663 INFO L226 Difference]: Without dead ends: 572 [2021-10-21 20:03:43,663 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 102.4ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-21 20:03:43,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2021-10-21 20:03:43,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 396. [2021-10-21 20:03:43,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 395 states have (on average 1.6050632911392404) internal successors, (634), 395 states have internal predecessors, (634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:03:43,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 634 transitions. [2021-10-21 20:03:43,679 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 634 transitions. Word has length 102 [2021-10-21 20:03:43,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:03:43,680 INFO L470 AbstractCegarLoop]: Abstraction has 396 states and 634 transitions. [2021-10-21 20:03:43,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.5) internal successors, (141), 6 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:03:43,680 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 634 transitions. [2021-10-21 20:03:43,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-10-21 20:03:43,682 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:03:43,682 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:03:43,711 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-10-21 20:03:43,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 20:03:43,896 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:03:43,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:03:43,897 INFO L82 PathProgramCache]: Analyzing trace with hash 600353316, now seen corresponding path program 1 times [2021-10-21 20:03:43,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 20:03:43,897 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1292856379] [2021-10-21 20:03:43,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:03:43,897 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 20:03:43,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 20:03:43,898 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 20:03:43,902 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-10-21 20:03:44,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:03:44,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-21 20:03:44,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:03:44,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-21 20:03:44,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-10-21 20:03:45,007 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:03:45,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 20:03:45,488 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:03:45,488 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 20:03:45,488 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1292856379] [2021-10-21 20:03:45,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1292856379] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-21 20:03:45,489 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:03:45,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-21 20:03:45,489 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570554165] [2021-10-21 20:03:45,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 20:03:45,489 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 20:03:45,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 20:03:45,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-21 20:03:45,490 INFO L87 Difference]: Start difference. First operand 396 states and 634 transitions. Second operand has 6 states, 6 states have (on average 23.833333333333332) internal successors, (143), 6 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:03:52,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:03:52,548 INFO L93 Difference]: Finished difference Result 945 states and 1498 transitions. [2021-10-21 20:03:52,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-21 20:03:52,550 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 23.833333333333332) internal successors, (143), 6 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 103 [2021-10-21 20:03:52,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:03:52,552 INFO L225 Difference]: With dead ends: 945 [2021-10-21 20:03:52,553 INFO L226 Difference]: Without dead ends: 566 [2021-10-21 20:03:52,553 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 96.5ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-21 20:03:52,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2021-10-21 20:03:52,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 398. [2021-10-21 20:03:52,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 397 states have (on average 1.6045340050377834) internal successors, (637), 397 states have internal predecessors, (637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:03:52,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 637 transitions. [2021-10-21 20:03:52,567 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 637 transitions. Word has length 103 [2021-10-21 20:03:52,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:03:52,568 INFO L470 AbstractCegarLoop]: Abstraction has 398 states and 637 transitions. [2021-10-21 20:03:52,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.833333333333332) internal successors, (143), 6 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:03:52,568 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 637 transitions. [2021-10-21 20:03:52,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-10-21 20:03:52,570 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:03:52,570 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:03:52,599 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-10-21 20:03:52,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 20:03:52,784 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:03:52,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:03:52,784 INFO L82 PathProgramCache]: Analyzing trace with hash -2038071909, now seen corresponding path program 1 times [2021-10-21 20:03:52,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 20:03:52,785 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [33961130] [2021-10-21 20:03:52,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:03:52,785 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 20:03:52,785 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 20:03:52,786 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 20:03:52,786 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-10-21 20:03:53,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:03:53,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-21 20:03:53,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:03:53,692 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-10-21 20:03:53,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2021-10-21 20:03:53,757 INFO L354 Elim1Store]: treesize reduction 41, result has 18.0 percent of original size [2021-10-21 20:03:53,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 24 [2021-10-21 20:03:53,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-10-21 20:03:54,093 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-10-21 20:03:54,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 20:03:54,533 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-10-21 20:03:54,533 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 20:03:54,533 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [33961130] [2021-10-21 20:03:54,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [33961130] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-21 20:03:54,533 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:03:54,533 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-21 20:03:54,533 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833934516] [2021-10-21 20:03:54,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 20:03:54,534 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 20:03:54,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 20:03:54,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-21 20:03:54,534 INFO L87 Difference]: Start difference. First operand 398 states and 637 transitions. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 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) [2021-10-21 20:04:00,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:04:00,814 INFO L93 Difference]: Finished difference Result 869 states and 1380 transitions. [2021-10-21 20:04:00,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-21 20:04:00,815 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 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 103 [2021-10-21 20:04:00,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:04:00,818 INFO L225 Difference]: With dead ends: 869 [2021-10-21 20:04:00,818 INFO L226 Difference]: Without dead ends: 492 [2021-10-21 20:04:00,818 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 199 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 115.2ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-21 20:04:00,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2021-10-21 20:04:00,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 398. [2021-10-21 20:04:00,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 397 states have (on average 1.584382871536524) internal successors, (629), 397 states have internal predecessors, (629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:04:00,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 629 transitions. [2021-10-21 20:04:00,831 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 629 transitions. Word has length 103 [2021-10-21 20:04:00,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:04:00,832 INFO L470 AbstractCegarLoop]: Abstraction has 398 states and 629 transitions. [2021-10-21 20:04:00,832 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 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) [2021-10-21 20:04:00,832 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 629 transitions. [2021-10-21 20:04:00,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-10-21 20:04:00,834 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:04:00,834 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:04:00,868 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-10-21 20:04:01,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 20:04:01,051 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:04:01,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:04:01,052 INFO L82 PathProgramCache]: Analyzing trace with hash 2125503099, now seen corresponding path program 1 times [2021-10-21 20:04:01,053 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 20:04:01,053 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [237698858] [2021-10-21 20:04:01,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:04:01,053 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 20:04:01,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 20:04:01,054 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 20:04:01,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-10-21 20:04:01,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:04:01,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-21 20:04:01,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:04:02,039 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-10-21 20:04:02,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2021-10-21 20:04:02,096 INFO L354 Elim1Store]: treesize reduction 41, result has 18.0 percent of original size [2021-10-21 20:04:02,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 24 [2021-10-21 20:04:02,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-10-21 20:04:02,455 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-10-21 20:04:02,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 20:04:02,880 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-10-21 20:04:02,880 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 20:04:02,881 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [237698858] [2021-10-21 20:04:02,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [237698858] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-21 20:04:02,881 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:04:02,881 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-21 20:04:02,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266390381] [2021-10-21 20:04:02,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 20:04:02,882 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 20:04:02,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 20:04:02,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-21 20:04:02,882 INFO L87 Difference]: Start difference. First operand 398 states and 629 transitions. Second operand has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:04:08,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:04:08,232 INFO L93 Difference]: Finished difference Result 849 states and 1339 transitions. [2021-10-21 20:04:08,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-21 20:04:08,233 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 104 [2021-10-21 20:04:08,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:04:08,235 INFO L225 Difference]: With dead ends: 849 [2021-10-21 20:04:08,235 INFO L226 Difference]: Without dead ends: 472 [2021-10-21 20:04:08,236 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 201 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 112.2ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-21 20:04:08,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2021-10-21 20:04:08,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 398. [2021-10-21 20:04:08,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 397 states have (on average 1.5642317380352644) internal successors, (621), 397 states have internal predecessors, (621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:04:08,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 621 transitions. [2021-10-21 20:04:08,250 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 621 transitions. Word has length 104 [2021-10-21 20:04:08,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:04:08,250 INFO L470 AbstractCegarLoop]: Abstraction has 398 states and 621 transitions. [2021-10-21 20:04:08,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:04:08,250 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 621 transitions. [2021-10-21 20:04:08,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-10-21 20:04:08,252 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:04:08,252 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:04:08,283 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-10-21 20:04:08,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 20:04:08,468 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:04:08,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:04:08,468 INFO L82 PathProgramCache]: Analyzing trace with hash -169229648, now seen corresponding path program 1 times [2021-10-21 20:04:08,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 20:04:08,469 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [245178976] [2021-10-21 20:04:08,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:04:08,469 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 20:04:08,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 20:04:08,470 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 20:04:08,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-10-21 20:04:09,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:04:09,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-21 20:04:09,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:04:09,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-21 20:04:09,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-10-21 20:04:09,613 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 80 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-10-21 20:04:09,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 20:04:10,065 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 80 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-10-21 20:04:10,065 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 20:04:10,065 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [245178976] [2021-10-21 20:04:10,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [245178976] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-21 20:04:10,065 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:04:10,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-21 20:04:10,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564776685] [2021-10-21 20:04:10,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 20:04:10,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 20:04:10,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 20:04:10,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-21 20:04:10,067 INFO L87 Difference]: Start difference. First operand 398 states and 621 transitions. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:04:18,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:04:18,704 INFO L93 Difference]: Finished difference Result 965 states and 1502 transitions. [2021-10-21 20:04:18,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-21 20:04:18,705 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-10-21 20:04:18,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:04:18,708 INFO L225 Difference]: With dead ends: 965 [2021-10-21 20:04:18,708 INFO L226 Difference]: Without dead ends: 588 [2021-10-21 20:04:18,709 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 92.3ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-21 20:04:18,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 588 states. [2021-10-21 20:04:18,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 588 to 428. [2021-10-21 20:04:18,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 428 states, 427 states have (on average 1.5526932084309133) internal successors, (663), 427 states have internal predecessors, (663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:04:18,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 663 transitions. [2021-10-21 20:04:18,729 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 663 transitions. Word has length 115 [2021-10-21 20:04:18,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:04:18,729 INFO L470 AbstractCegarLoop]: Abstraction has 428 states and 663 transitions. [2021-10-21 20:04:18,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:04:18,730 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 663 transitions. [2021-10-21 20:04:18,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-10-21 20:04:18,731 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:04:18,731 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:04:18,748 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-10-21 20:04:18,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 20:04:18,949 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:04:18,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:04:18,949 INFO L82 PathProgramCache]: Analyzing trace with hash -425439256, now seen corresponding path program 1 times [2021-10-21 20:04:18,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 20:04:18,950 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [596765045] [2021-10-21 20:04:18,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:04:18,950 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 20:04:18,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 20:04:18,950 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 20:04:18,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-10-21 20:04:19,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:04:19,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-21 20:04:19,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:04:19,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-21 20:04:19,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-10-21 20:04:20,166 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 82 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-10-21 20:04:20,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 20:04:20,673 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 82 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-10-21 20:04:20,674 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 20:04:20,674 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [596765045] [2021-10-21 20:04:20,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [596765045] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-21 20:04:20,674 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:04:20,674 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-21 20:04:20,674 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355403356] [2021-10-21 20:04:20,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 20:04:20,675 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 20:04:20,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 20:04:20,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-21 20:04:20,676 INFO L87 Difference]: Start difference. First operand 428 states and 663 transitions. Second operand has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:04:25,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:04:25,918 INFO L93 Difference]: Finished difference Result 981 states and 1517 transitions. [2021-10-21 20:04:25,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-21 20:04:25,919 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 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 116 [2021-10-21 20:04:25,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:04:25,922 INFO L225 Difference]: With dead ends: 981 [2021-10-21 20:04:25,922 INFO L226 Difference]: Without dead ends: 574 [2021-10-21 20:04:25,922 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 226 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 97.6ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-21 20:04:25,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2021-10-21 20:04:25,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 428. [2021-10-21 20:04:25,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 428 states, 427 states have (on average 1.5386416861826697) internal successors, (657), 427 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:04:25,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 657 transitions. [2021-10-21 20:04:25,936 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 657 transitions. Word has length 116 [2021-10-21 20:04:25,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:04:25,936 INFO L470 AbstractCegarLoop]: Abstraction has 428 states and 657 transitions. [2021-10-21 20:04:25,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:04:25,937 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 657 transitions. [2021-10-21 20:04:25,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-10-21 20:04:25,938 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:04:25,938 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:04:25,967 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-10-21 20:04:26,153 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 20:04:26,153 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:04:26,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:04:26,154 INFO L82 PathProgramCache]: Analyzing trace with hash -1492654059, now seen corresponding path program 1 times [2021-10-21 20:04:26,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 20:04:26,154 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1637104128] [2021-10-21 20:04:26,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:04:26,155 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 20:04:26,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 20:04:26,155 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 20:04:26,156 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-10-21 20:04:26,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:04:26,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-21 20:04:26,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:04:27,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-21 20:04:27,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-10-21 20:04:27,496 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 76 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-10-21 20:04:27,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 20:04:27,941 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 76 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-10-21 20:04:27,942 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 20:04:27,942 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1637104128] [2021-10-21 20:04:27,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1637104128] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-21 20:04:27,942 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:04:27,942 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-21 20:04:27,942 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78476643] [2021-10-21 20:04:27,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 20:04:27,946 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 20:04:27,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 20:04:27,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-21 20:04:27,948 INFO L87 Difference]: Start difference. First operand 428 states and 657 transitions. Second operand has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:04:35,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:04:35,629 INFO L93 Difference]: Finished difference Result 1023 states and 1568 transitions. [2021-10-21 20:04:35,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-21 20:04:35,630 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 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 119 [2021-10-21 20:04:35,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:04:35,633 INFO L225 Difference]: With dead ends: 1023 [2021-10-21 20:04:35,633 INFO L226 Difference]: Without dead ends: 616 [2021-10-21 20:04:35,633 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 96.1ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-21 20:04:35,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2021-10-21 20:04:35,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 456. [2021-10-21 20:04:35,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 456 states, 455 states have (on average 1.5252747252747252) internal successors, (694), 455 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:04:35,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 694 transitions. [2021-10-21 20:04:35,654 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 694 transitions. Word has length 119 [2021-10-21 20:04:35,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:04:35,655 INFO L470 AbstractCegarLoop]: Abstraction has 456 states and 694 transitions. [2021-10-21 20:04:35,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:04:35,655 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 694 transitions. [2021-10-21 20:04:35,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-10-21 20:04:35,657 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:04:35,657 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-10-21 20:04:35,673 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-10-21 20:04:35,872 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 20:04:35,873 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:04:35,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:04:35,873 INFO L82 PathProgramCache]: Analyzing trace with hash 602824877, now seen corresponding path program 1 times [2021-10-21 20:04:35,874 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 20:04:35,874 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1876027131] [2021-10-21 20:04:35,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:04:35,874 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 20:04:35,874 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 20:04:35,875 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 20:04:35,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-10-21 20:04:36,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:04:36,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-21 20:04:36,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:04:36,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-21 20:04:36,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-10-21 20:04:37,184 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 78 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-10-21 20:04:37,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 20:04:37,659 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 78 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-10-21 20:04:37,659 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 20:04:37,659 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1876027131] [2021-10-21 20:04:37,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1876027131] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-21 20:04:37,659 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:04:37,660 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-21 20:04:37,660 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911527599] [2021-10-21 20:04:37,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 20:04:37,661 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 20:04:37,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 20:04:37,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-21 20:04:37,661 INFO L87 Difference]: Start difference. First operand 456 states and 694 transitions. Second operand has 6 states, 6 states have (on average 19.833333333333332) internal successors, (119), 6 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:04:45,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:04:45,149 INFO L93 Difference]: Finished difference Result 1029 states and 1564 transitions. [2021-10-21 20:04:45,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-21 20:04:45,154 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 19.833333333333332) internal successors, (119), 6 states have internal predecessors, (119), 0 states have call successors, (0), 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 120 [2021-10-21 20:04:45,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:04:45,157 INFO L225 Difference]: With dead ends: 1029 [2021-10-21 20:04:45,158 INFO L226 Difference]: Without dead ends: 594 [2021-10-21 20:04:45,158 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 234 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 94.6ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-21 20:04:45,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2021-10-21 20:04:45,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 456. [2021-10-21 20:04:45,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 456 states, 455 states have (on average 1.5098901098901099) internal successors, (687), 455 states have internal predecessors, (687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:04:45,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 687 transitions. [2021-10-21 20:04:45,175 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 687 transitions. Word has length 120 [2021-10-21 20:04:45,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:04:45,176 INFO L470 AbstractCegarLoop]: Abstraction has 456 states and 687 transitions. [2021-10-21 20:04:45,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.833333333333332) internal successors, (119), 6 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:04:45,176 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 687 transitions. [2021-10-21 20:04:45,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-10-21 20:04:45,178 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:04:45,178 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:04:45,206 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-10-21 20:04:45,406 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 20:04:45,407 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:04:45,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:04:45,407 INFO L82 PathProgramCache]: Analyzing trace with hash 499118442, now seen corresponding path program 1 times [2021-10-21 20:04:45,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 20:04:45,408 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [211416226] [2021-10-21 20:04:45,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:04:45,408 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 20:04:45,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 20:04:45,409 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 20:04:45,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-10-21 20:04:46,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:04:46,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-21 20:04:46,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:04:46,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-21 20:04:46,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-10-21 20:04:46,791 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-10-21 20:04:46,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 20:04:47,261 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-10-21 20:04:47,261 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 20:04:47,261 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [211416226] [2021-10-21 20:04:47,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [211416226] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-21 20:04:47,261 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:04:47,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-21 20:04:47,262 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781957302] [2021-10-21 20:04:47,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 20:04:47,262 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 20:04:47,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 20:04:47,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-21 20:04:47,263 INFO L87 Difference]: Start difference. First operand 456 states and 687 transitions. Second operand has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:04:52,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:04:52,274 INFO L93 Difference]: Finished difference Result 1071 states and 1611 transitions. [2021-10-21 20:04:52,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-21 20:04:52,274 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 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 127 [2021-10-21 20:04:52,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:04:52,277 INFO L225 Difference]: With dead ends: 1071 [2021-10-21 20:04:52,277 INFO L226 Difference]: Without dead ends: 636 [2021-10-21 20:04:52,278 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 248 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 86.8ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-21 20:04:52,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 636 states. [2021-10-21 20:04:52,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 636 to 491. [2021-10-21 20:04:52,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 491 states, 490 states have (on average 1.5020408163265306) internal successors, (736), 490 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:04:52,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 736 transitions. [2021-10-21 20:04:52,294 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 736 transitions. Word has length 127 [2021-10-21 20:04:52,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:04:52,295 INFO L470 AbstractCegarLoop]: Abstraction has 491 states and 736 transitions. [2021-10-21 20:04:52,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:04:52,295 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 736 transitions. [2021-10-21 20:04:52,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-10-21 20:04:52,297 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:04:52,297 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:04:52,316 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (23)] Ended with exit code 0 [2021-10-21 20:04:52,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 20:04:52,513 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:04:52,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:04:52,513 INFO L82 PathProgramCache]: Analyzing trace with hash 1629629437, now seen corresponding path program 1 times [2021-10-21 20:04:52,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 20:04:52,514 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1039437323] [2021-10-21 20:04:52,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:04:52,514 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 20:04:52,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 20:04:52,514 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 20:04:52,517 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-10-21 20:04:53,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:04:53,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-21 20:04:53,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:04:53,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-21 20:04:53,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-10-21 20:04:53,966 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 92 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-10-21 20:04:53,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 20:04:54,487 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 92 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-10-21 20:04:54,487 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 20:04:54,488 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1039437323] [2021-10-21 20:04:54,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1039437323] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-21 20:04:54,488 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:04:54,488 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-21 20:04:54,488 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217104203] [2021-10-21 20:04:54,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 20:04:54,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 20:04:54,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 20:04:54,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-21 20:04:54,489 INFO L87 Difference]: Start difference. First operand 491 states and 736 transitions. Second operand has 6 states, 6 states have (on average 21.5) internal successors, (129), 6 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:05:01,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:05:01,994 INFO L93 Difference]: Finished difference Result 1096 states and 1642 transitions. [2021-10-21 20:05:01,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-21 20:05:01,995 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.5) internal successors, (129), 6 states have internal predecessors, (129), 0 states have call successors, (0), 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 128 [2021-10-21 20:05:01,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:05:01,997 INFO L225 Difference]: With dead ends: 1096 [2021-10-21 20:05:01,997 INFO L226 Difference]: Without dead ends: 626 [2021-10-21 20:05:01,998 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 250 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 90.4ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-21 20:05:01,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2021-10-21 20:05:02,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 491. [2021-10-21 20:05:02,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 491 states, 490 states have (on average 1.493877551020408) internal successors, (732), 490 states have internal predecessors, (732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:05:02,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 732 transitions. [2021-10-21 20:05:02,010 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 732 transitions. Word has length 128 [2021-10-21 20:05:02,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:05:02,010 INFO L470 AbstractCegarLoop]: Abstraction has 491 states and 732 transitions. [2021-10-21 20:05:02,011 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.5) internal successors, (129), 6 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:05:02,011 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 732 transitions. [2021-10-21 20:05:02,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-10-21 20:05:02,012 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:05:02,012 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:05:02,043 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (24)] Ended with exit code 0 [2021-10-21 20:05:02,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 20:05:02,228 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:05:02,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:05:02,228 INFO L82 PathProgramCache]: Analyzing trace with hash -1995517880, now seen corresponding path program 1 times [2021-10-21 20:05:02,229 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 20:05:02,229 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1151142516] [2021-10-21 20:05:02,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:05:02,229 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 20:05:02,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 20:05:02,230 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 20:05:02,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-10-21 20:05:03,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:05:03,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-21 20:05:03,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:05:03,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-21 20:05:03,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-10-21 20:05:03,777 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 100 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-10-21 20:05:03,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 20:05:04,308 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 100 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-10-21 20:05:04,308 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 20:05:04,309 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1151142516] [2021-10-21 20:05:04,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1151142516] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-21 20:05:04,309 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:05:04,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-21 20:05:04,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834174606] [2021-10-21 20:05:04,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 20:05:04,310 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 20:05:04,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 20:05:04,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-21 20:05:04,310 INFO L87 Difference]: Start difference. First operand 491 states and 732 transitions. Second operand has 6 states, 6 states have (on average 24.5) internal successors, (147), 6 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:05:09,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:05:09,475 INFO L93 Difference]: Finished difference Result 1139 states and 1694 transitions. [2021-10-21 20:05:09,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-21 20:05:09,475 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 24.5) internal successors, (147), 6 states have internal predecessors, (147), 0 states have call successors, (0), 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 143 [2021-10-21 20:05:09,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:05:09,479 INFO L225 Difference]: With dead ends: 1139 [2021-10-21 20:05:09,479 INFO L226 Difference]: Without dead ends: 669 [2021-10-21 20:05:09,479 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 280 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 118.7ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-21 20:05:09,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 669 states. [2021-10-21 20:05:09,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 669 to 534. [2021-10-21 20:05:09,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 534 states, 533 states have (on average 1.4840525328330207) internal successors, (791), 533 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) [2021-10-21 20:05:09,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 534 states to 534 states and 791 transitions. [2021-10-21 20:05:09,496 INFO L78 Accepts]: Start accepts. Automaton has 534 states and 791 transitions. Word has length 143 [2021-10-21 20:05:09,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:05:09,497 INFO L470 AbstractCegarLoop]: Abstraction has 534 states and 791 transitions. [2021-10-21 20:05:09,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 24.5) internal successors, (147), 6 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:05:09,497 INFO L276 IsEmpty]: Start isEmpty. Operand 534 states and 791 transitions. [2021-10-21 20:05:09,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-10-21 20:05:09,498 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:05:09,498 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-10-21 20:05:09,511 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-10-21 20:05:09,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 20:05:09,699 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:05:09,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:05:09,700 INFO L82 PathProgramCache]: Analyzing trace with hash 2111332091, now seen corresponding path program 1 times [2021-10-21 20:05:09,700 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 20:05:09,700 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [209472933] [2021-10-21 20:05:09,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:05:09,700 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 20:05:09,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 20:05:09,701 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 20:05:09,756 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-10-21 20:05:10,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:05:10,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-21 20:05:10,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:05:10,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-21 20:05:11,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-10-21 20:05:11,435 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 101 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-10-21 20:05:11,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 20:05:12,025 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 101 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-10-21 20:05:12,025 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 20:05:12,025 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [209472933] [2021-10-21 20:05:12,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [209472933] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-21 20:05:12,025 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:05:12,026 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-21 20:05:12,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748620564] [2021-10-21 20:05:12,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 20:05:12,026 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 20:05:12,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 20:05:12,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-21 20:05:12,027 INFO L87 Difference]: Start difference. First operand 534 states and 791 transitions. Second operand has 6 states, 6 states have (on average 24.833333333333332) internal successors, (149), 6 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:05:17,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:05:17,539 INFO L93 Difference]: Finished difference Result 1180 states and 1748 transitions. [2021-10-21 20:05:17,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-21 20:05:17,540 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 24.833333333333332) internal successors, (149), 6 states have internal predecessors, (149), 0 states have call successors, (0), 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 144 [2021-10-21 20:05:17,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:05:17,543 INFO L225 Difference]: With dead ends: 1180 [2021-10-21 20:05:17,543 INFO L226 Difference]: Without dead ends: 651 [2021-10-21 20:05:17,543 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 282 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 92.8ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-21 20:05:17,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 651 states. [2021-10-21 20:05:17,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 651 to 526. [2021-10-21 20:05:17,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 526 states, 525 states have (on average 1.48) internal successors, (777), 525 states have internal predecessors, (777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:05:17,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 526 states to 526 states and 777 transitions. [2021-10-21 20:05:17,561 INFO L78 Accepts]: Start accepts. Automaton has 526 states and 777 transitions. Word has length 144 [2021-10-21 20:05:17,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:05:17,561 INFO L470 AbstractCegarLoop]: Abstraction has 526 states and 777 transitions. [2021-10-21 20:05:17,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 24.833333333333332) internal successors, (149), 6 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:05:17,562 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states and 777 transitions. [2021-10-21 20:05:17,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-10-21 20:05:17,568 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:05:17,569 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:05:17,586 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-10-21 20:05:17,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 20:05:17,786 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:05:17,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:05:17,786 INFO L82 PathProgramCache]: Analyzing trace with hash -1202867717, now seen corresponding path program 1 times [2021-10-21 20:05:17,787 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 20:05:17,787 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [315063919] [2021-10-21 20:05:17,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:05:17,787 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 20:05:17,787 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 20:05:17,788 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 20:05:17,789 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-10-21 20:05:18,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:05:18,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-21 20:05:18,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:05:19,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-21 20:05:19,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-10-21 20:05:19,513 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 103 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-10-21 20:05:19,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 20:05:20,060 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 103 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-10-21 20:05:20,060 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 20:05:20,060 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [315063919] [2021-10-21 20:05:20,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [315063919] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-21 20:05:20,060 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:05:20,061 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-21 20:05:20,061 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654393863] [2021-10-21 20:05:20,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 20:05:20,061 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 20:05:20,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 20:05:20,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-21 20:05:20,062 INFO L87 Difference]: Start difference. First operand 526 states and 777 transitions. Second operand has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:05:25,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:05:25,693 INFO L93 Difference]: Finished difference Result 1190 states and 1761 transitions. [2021-10-21 20:05:25,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-21 20:05:25,694 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 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 147 [2021-10-21 20:05:25,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:05:25,697 INFO L225 Difference]: With dead ends: 1190 [2021-10-21 20:05:25,697 INFO L226 Difference]: Without dead ends: 685 [2021-10-21 20:05:25,698 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 288 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 92.2ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-21 20:05:25,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 685 states. [2021-10-21 20:05:25,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 685 to 552. [2021-10-21 20:05:25,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 552 states, 551 states have (on average 1.4646098003629764) internal successors, (807), 551 states have internal predecessors, (807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:05:25,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 807 transitions. [2021-10-21 20:05:25,717 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 807 transitions. Word has length 147 [2021-10-21 20:05:25,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:05:25,718 INFO L470 AbstractCegarLoop]: Abstraction has 552 states and 807 transitions. [2021-10-21 20:05:25,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:05:25,718 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 807 transitions. [2021-10-21 20:05:25,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-10-21 20:05:25,720 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:05:25,720 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2021-10-21 20:05:25,748 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-10-21 20:05:25,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 20:05:25,937 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:05:25,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:05:25,938 INFO L82 PathProgramCache]: Analyzing trace with hash 1174009331, now seen corresponding path program 1 times [2021-10-21 20:05:25,938 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 20:05:25,938 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [419188013] [2021-10-21 20:05:25,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:05:25,939 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 20:05:25,939 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 20:05:25,939 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 20:05:25,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-10-21 20:05:27,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:05:27,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-21 20:05:27,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:05:27,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-21 20:05:27,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-10-21 20:05:27,709 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 106 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-10-21 20:05:27,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 20:05:28,234 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 106 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-10-21 20:05:28,234 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 20:05:28,234 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [419188013] [2021-10-21 20:05:28,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [419188013] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-21 20:05:28,235 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:05:28,235 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-21 20:05:28,235 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918467979] [2021-10-21 20:05:28,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 20:05:28,236 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 20:05:28,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 20:05:28,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-21 20:05:28,237 INFO L87 Difference]: Start difference. First operand 552 states and 807 transitions. Second operand has 6 states, 6 states have (on average 20.5) internal successors, (123), 6 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:05:33,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:05:33,566 INFO L93 Difference]: Finished difference Result 1206 states and 1767 transitions. [2021-10-21 20:05:33,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-21 20:05:33,567 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 20.5) internal successors, (123), 6 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 148 [2021-10-21 20:05:33,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:05:33,569 INFO L225 Difference]: With dead ends: 1206 [2021-10-21 20:05:33,569 INFO L226 Difference]: Without dead ends: 675 [2021-10-21 20:05:33,570 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 290 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 97.0ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-21 20:05:33,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 675 states. [2021-10-21 20:05:33,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 675 to 552. [2021-10-21 20:05:33,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 552 states, 551 states have (on average 1.4464609800362977) internal successors, (797), 551 states have internal predecessors, (797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:05:33,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 797 transitions. [2021-10-21 20:05:33,591 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 797 transitions. Word has length 148 [2021-10-21 20:05:33,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:05:33,591 INFO L470 AbstractCegarLoop]: Abstraction has 552 states and 797 transitions. [2021-10-21 20:05:33,592 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.5) internal successors, (123), 6 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:05:33,592 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 797 transitions. [2021-10-21 20:05:33,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-10-21 20:05:33,593 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:05:33,593 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 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] [2021-10-21 20:05:33,613 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-10-21 20:05:33,794 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 20:05:33,794 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:05:33,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:05:33,794 INFO L82 PathProgramCache]: Analyzing trace with hash 877280715, now seen corresponding path program 1 times [2021-10-21 20:05:33,795 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 20:05:33,795 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [807549172] [2021-10-21 20:05:33,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:05:33,795 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 20:05:33,795 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 20:05:33,796 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 20:05:33,798 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-10-21 20:05:35,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:05:35,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-21 20:05:35,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:05:35,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-21 20:05:35,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-10-21 20:05:35,730 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 124 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-10-21 20:05:35,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 20:05:36,364 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 124 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-10-21 20:05:36,364 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 20:05:36,364 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [807549172] [2021-10-21 20:05:36,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [807549172] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-21 20:05:36,365 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:05:36,365 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-21 20:05:36,365 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330777950] [2021-10-21 20:05:36,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 20:05:36,366 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 20:05:36,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 20:05:36,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-21 20:05:36,367 INFO L87 Difference]: Start difference. First operand 552 states and 797 transitions. Second operand has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:05:41,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:05:41,548 INFO L93 Difference]: Finished difference Result 1240 states and 1795 transitions. [2021-10-21 20:05:41,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-21 20:05:41,549 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 161 [2021-10-21 20:05:41,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:05:41,552 INFO L225 Difference]: With dead ends: 1240 [2021-10-21 20:05:41,552 INFO L226 Difference]: Without dead ends: 709 [2021-10-21 20:05:41,552 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 316 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 96.3ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-21 20:05:41,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 709 states. [2021-10-21 20:05:41,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 709 to 585. [2021-10-21 20:05:41,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 585 states, 584 states have (on average 1.4366438356164384) internal successors, (839), 584 states have internal predecessors, (839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:05:41,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 839 transitions. [2021-10-21 20:05:41,578 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 839 transitions. Word has length 161 [2021-10-21 20:05:41,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:05:41,578 INFO L470 AbstractCegarLoop]: Abstraction has 585 states and 839 transitions. [2021-10-21 20:05:41,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:05:41,578 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 839 transitions. [2021-10-21 20:05:41,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-10-21 20:05:41,580 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:05:41,580 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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] [2021-10-21 20:05:41,598 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-10-21 20:05:41,798 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 20:05:41,798 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:05:41,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:05:41,798 INFO L82 PathProgramCache]: Analyzing trace with hash -2122717122, now seen corresponding path program 1 times [2021-10-21 20:05:41,799 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 20:05:41,799 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1174552054] [2021-10-21 20:05:41,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:05:41,799 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 20:05:41,799 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 20:05:41,800 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 20:05:41,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-10-21 20:05:43,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:05:43,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-21 20:05:43,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:05:43,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-21 20:05:43,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-10-21 20:05:43,842 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 127 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-10-21 20:05:43,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 20:05:44,456 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 127 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-10-21 20:05:44,456 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 20:05:44,456 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1174552054] [2021-10-21 20:05:44,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1174552054] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-21 20:05:44,456 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:05:44,457 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-21 20:05:44,457 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115361709] [2021-10-21 20:05:44,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 20:05:44,457 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 20:05:44,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 20:05:44,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-21 20:05:44,458 INFO L87 Difference]: Start difference. First operand 585 states and 839 transitions. Second operand has 6 states, 6 states have (on average 22.0) internal successors, (132), 6 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:05:52,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:05:52,504 INFO L93 Difference]: Finished difference Result 1266 states and 1820 transitions. [2021-10-21 20:05:52,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-21 20:05:52,506 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 22.0) internal successors, (132), 6 states have internal predecessors, (132), 0 states have call successors, (0), 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 162 [2021-10-21 20:05:52,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:05:52,510 INFO L225 Difference]: With dead ends: 1266 [2021-10-21 20:05:52,510 INFO L226 Difference]: Without dead ends: 684 [2021-10-21 20:05:52,511 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 318 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 93.6ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-21 20:05:52,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 684 states. [2021-10-21 20:05:52,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 684 to 576. [2021-10-21 20:05:52,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 576 states, 575 states have (on average 1.4243478260869564) internal successors, (819), 575 states have internal predecessors, (819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:05:52,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 576 states to 576 states and 819 transitions. [2021-10-21 20:05:52,539 INFO L78 Accepts]: Start accepts. Automaton has 576 states and 819 transitions. Word has length 162 [2021-10-21 20:05:52,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:05:52,539 INFO L470 AbstractCegarLoop]: Abstraction has 576 states and 819 transitions. [2021-10-21 20:05:52,539 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.0) internal successors, (132), 6 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:05:52,539 INFO L276 IsEmpty]: Start isEmpty. Operand 576 states and 819 transitions. [2021-10-21 20:05:52,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-10-21 20:05:52,541 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:05:52,542 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:05:52,561 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-10-21 20:05:52,760 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 20:05:52,761 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:05:52,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:05:52,761 INFO L82 PathProgramCache]: Analyzing trace with hash 1410240907, now seen corresponding path program 1 times [2021-10-21 20:05:52,762 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 20:05:52,762 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [354596639] [2021-10-21 20:05:52,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:05:52,762 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 20:05:52,762 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 20:05:52,763 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 20:05:52,765 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-10-21 20:05:54,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:05:54,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-21 20:05:54,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:05:54,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-21 20:05:54,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-10-21 20:05:54,825 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 91 proven. 0 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2021-10-21 20:05:54,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 20:05:55,383 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 91 proven. 0 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2021-10-21 20:05:55,384 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 20:05:55,384 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [354596639] [2021-10-21 20:05:55,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [354596639] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-21 20:05:55,384 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:05:55,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-21 20:05:55,385 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119241765] [2021-10-21 20:05:55,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 20:05:55,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 20:05:55,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 20:05:55,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-21 20:05:55,386 INFO L87 Difference]: Start difference. First operand 576 states and 819 transitions. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:06:02,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:06:02,878 INFO L93 Difference]: Finished difference Result 1264 states and 1807 transitions. [2021-10-21 20:06:02,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-21 20:06:02,881 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 165 [2021-10-21 20:06:02,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:06:02,884 INFO L225 Difference]: With dead ends: 1264 [2021-10-21 20:06:02,884 INFO L226 Difference]: Without dead ends: 709 [2021-10-21 20:06:02,884 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 324 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 89.6ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-21 20:06:02,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 709 states. [2021-10-21 20:06:02,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 709 to 598. [2021-10-21 20:06:02,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 598 states, 597 states have (on average 1.4053601340033501) internal successors, (839), 597 states have internal predecessors, (839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:06:02,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 598 states to 598 states and 839 transitions. [2021-10-21 20:06:02,918 INFO L78 Accepts]: Start accepts. Automaton has 598 states and 839 transitions. Word has length 165 [2021-10-21 20:06:02,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:06:02,918 INFO L470 AbstractCegarLoop]: Abstraction has 598 states and 839 transitions. [2021-10-21 20:06:02,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:06:02,919 INFO L276 IsEmpty]: Start isEmpty. Operand 598 states and 839 transitions. [2021-10-21 20:06:02,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-10-21 20:06:02,920 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:06:02,920 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:06:02,943 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-10-21 20:06:03,134 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 20:06:03,135 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:06:03,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:06:03,135 INFO L82 PathProgramCache]: Analyzing trace with hash 1687277123, now seen corresponding path program 1 times [2021-10-21 20:06:03,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 20:06:03,136 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1485592351] [2021-10-21 20:06:03,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:06:03,136 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 20:06:03,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 20:06:03,137 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 20:06:03,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-10-21 20:06:04,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:06:04,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-21 20:06:04,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:06:04,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-21 20:06:04,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-10-21 20:06:05,152 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 94 proven. 0 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2021-10-21 20:06:05,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 20:06:05,704 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 94 proven. 0 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2021-10-21 20:06:05,705 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 20:06:05,705 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1485592351] [2021-10-21 20:06:05,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1485592351] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-21 20:06:05,705 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:06:05,706 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-21 20:06:05,706 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883984821] [2021-10-21 20:06:05,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 20:06:05,707 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 20:06:05,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 20:06:05,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-21 20:06:05,708 INFO L87 Difference]: Start difference. First operand 598 states and 839 transitions. Second operand has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:06:11,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:06:11,406 INFO L93 Difference]: Finished difference Result 1279 states and 1803 transitions. [2021-10-21 20:06:11,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-21 20:06:11,409 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 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 166 [2021-10-21 20:06:11,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:06:11,412 INFO L225 Difference]: With dead ends: 1279 [2021-10-21 20:06:11,412 INFO L226 Difference]: Without dead ends: 702 [2021-10-21 20:06:11,412 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 326 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 86.9ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-21 20:06:11,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2021-10-21 20:06:11,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 598. [2021-10-21 20:06:11,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 598 states, 597 states have (on average 1.3852596314907872) internal successors, (827), 597 states have internal predecessors, (827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:06:11,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 598 states to 598 states and 827 transitions. [2021-10-21 20:06:11,426 INFO L78 Accepts]: Start accepts. Automaton has 598 states and 827 transitions. Word has length 166 [2021-10-21 20:06:11,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:06:11,426 INFO L470 AbstractCegarLoop]: Abstraction has 598 states and 827 transitions. [2021-10-21 20:06:11,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:06:11,427 INFO L276 IsEmpty]: Start isEmpty. Operand 598 states and 827 transitions. [2021-10-21 20:06:11,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-10-21 20:06:11,428 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:06:11,428 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:06:11,443 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2021-10-21 20:06:11,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 20:06:11,635 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:06:11,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:06:11,635 INFO L82 PathProgramCache]: Analyzing trace with hash 1512598721, now seen corresponding path program 1 times [2021-10-21 20:06:11,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 20:06:11,636 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [508903761] [2021-10-21 20:06:11,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:06:11,637 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 20:06:11,638 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 20:06:11,638 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 20:06:11,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-10-21 20:06:13,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:06:13,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-21 20:06:13,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:06:13,742 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 154 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-10-21 20:06:13,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 20:06:14,349 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 154 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-10-21 20:06:14,349 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 20:06:14,349 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [508903761] [2021-10-21 20:06:14,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [508903761] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-21 20:06:14,349 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:06:14,349 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-21 20:06:14,350 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637244591] [2021-10-21 20:06:14,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 20:06:14,350 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 20:06:14,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 20:06:14,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-21 20:06:14,351 INFO L87 Difference]: Start difference. First operand 598 states and 827 transitions. Second operand has 4 states, 4 states have (on average 42.0) internal successors, (168), 4 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:06:14,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:06:14,701 INFO L93 Difference]: Finished difference Result 2277 states and 3167 transitions. [2021-10-21 20:06:14,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 20:06:14,702 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 42.0) internal successors, (168), 4 states have internal predecessors, (168), 0 states have call successors, (0), 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 168 [2021-10-21 20:06:14,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:06:14,713 INFO L225 Difference]: With dead ends: 2277 [2021-10-21 20:06:14,713 INFO L226 Difference]: Without dead ends: 1700 [2021-10-21 20:06:14,715 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 332 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.3ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-21 20:06:14,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1700 states. [2021-10-21 20:06:14,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1700 to 1678. [2021-10-21 20:06:14,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1678 states, 1677 states have (on average 1.3852116875372689) internal successors, (2323), 1677 states have internal predecessors, (2323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:06:14,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1678 states to 1678 states and 2323 transitions. [2021-10-21 20:06:14,773 INFO L78 Accepts]: Start accepts. Automaton has 1678 states and 2323 transitions. Word has length 168 [2021-10-21 20:06:14,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:06:14,773 INFO L470 AbstractCegarLoop]: Abstraction has 1678 states and 2323 transitions. [2021-10-21 20:06:14,773 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 42.0) internal successors, (168), 4 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:06:14,773 INFO L276 IsEmpty]: Start isEmpty. Operand 1678 states and 2323 transitions. [2021-10-21 20:06:14,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2021-10-21 20:06:14,776 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:06:14,776 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:06:14,798 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2021-10-21 20:06:14,990 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 20:06:14,991 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:06:14,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:06:14,991 INFO L82 PathProgramCache]: Analyzing trace with hash -208127892, now seen corresponding path program 1 times [2021-10-21 20:06:14,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 20:06:14,992 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1131165457] [2021-10-21 20:06:14,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:06:14,992 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 20:06:14,992 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 20:06:14,993 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 20:06:14,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-10-21 20:06:16,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:06:16,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-21 20:06:16,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:06:16,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-21 20:06:16,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-10-21 20:06:17,218 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 126 proven. 0 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2021-10-21 20:06:17,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 20:06:17,798 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 126 proven. 0 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2021-10-21 20:06:17,798 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 20:06:17,799 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1131165457] [2021-10-21 20:06:17,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1131165457] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-21 20:06:17,799 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:06:17,799 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-21 20:06:17,799 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133994231] [2021-10-21 20:06:17,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 20:06:17,799 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 20:06:17,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 20:06:17,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-21 20:06:17,800 INFO L87 Difference]: Start difference. First operand 1678 states and 2323 transitions. Second operand has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:06:24,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:06:24,094 INFO L93 Difference]: Finished difference Result 3705 states and 5134 transitions. [2021-10-21 20:06:24,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-21 20:06:24,098 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 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 169 [2021-10-21 20:06:24,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:06:24,109 INFO L225 Difference]: With dead ends: 3705 [2021-10-21 20:06:24,109 INFO L226 Difference]: Without dead ends: 2048 [2021-10-21 20:06:24,111 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 332 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 93.3ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-21 20:06:24,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2048 states. [2021-10-21 20:06:24,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2048 to 1750. [2021-10-21 20:06:24,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1750 states, 1749 states have (on average 1.3664951400800458) internal successors, (2390), 1749 states have internal predecessors, (2390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:06:24,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1750 states to 1750 states and 2390 transitions. [2021-10-21 20:06:24,195 INFO L78 Accepts]: Start accepts. Automaton has 1750 states and 2390 transitions. Word has length 169 [2021-10-21 20:06:24,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:06:24,195 INFO L470 AbstractCegarLoop]: Abstraction has 1750 states and 2390 transitions. [2021-10-21 20:06:24,196 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:06:24,196 INFO L276 IsEmpty]: Start isEmpty. Operand 1750 states and 2390 transitions. [2021-10-21 20:06:24,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2021-10-21 20:06:24,198 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:06:24,199 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:06:24,219 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2021-10-21 20:06:24,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 20:06:24,419 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:06:24,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:06:24,419 INFO L82 PathProgramCache]: Analyzing trace with hash -1082438900, now seen corresponding path program 1 times [2021-10-21 20:06:24,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 20:06:24,420 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [949842006] [2021-10-21 20:06:24,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:06:24,421 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 20:06:24,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 20:06:24,422 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 20:06:24,461 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-10-21 20:06:26,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:06:26,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-21 20:06:26,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:06:26,969 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2021-10-21 20:06:26,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 20:06:27,520 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2021-10-21 20:06:27,520 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 20:06:27,520 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [949842006] [2021-10-21 20:06:27,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [949842006] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-21 20:06:27,520 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:06:27,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-21 20:06:27,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694092469] [2021-10-21 20:06:27,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-21 20:06:27,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 20:06:27,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-21 20:06:27,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 20:06:27,522 INFO L87 Difference]: Start difference. First operand 1750 states and 2390 transitions. Second operand has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:06:27,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:06:27,745 INFO L93 Difference]: Finished difference Result 4007 states and 5483 transitions. [2021-10-21 20:06:27,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-21 20:06:27,745 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 169 [2021-10-21 20:06:27,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:06:27,753 INFO L225 Difference]: With dead ends: 4007 [2021-10-21 20:06:27,754 INFO L226 Difference]: Without dead ends: 2278 [2021-10-21 20:06:27,755 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 335 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 20:06:27,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2278 states. [2021-10-21 20:06:27,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2278 to 2258. [2021-10-21 20:06:27,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2258 states, 2257 states have (on average 1.3655294638901196) internal successors, (3082), 2257 states have internal predecessors, (3082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:06:27,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2258 states to 2258 states and 3082 transitions. [2021-10-21 20:06:27,818 INFO L78 Accepts]: Start accepts. Automaton has 2258 states and 3082 transitions. Word has length 169 [2021-10-21 20:06:27,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:06:27,819 INFO L470 AbstractCegarLoop]: Abstraction has 2258 states and 3082 transitions. [2021-10-21 20:06:27,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:06:27,819 INFO L276 IsEmpty]: Start isEmpty. Operand 2258 states and 3082 transitions. [2021-10-21 20:06:27,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2021-10-21 20:06:27,821 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:06:27,822 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:06:27,840 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2021-10-21 20:06:28,030 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 20:06:28,031 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:06:28,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:06:28,031 INFO L82 PathProgramCache]: Analyzing trace with hash -1347086390, now seen corresponding path program 1 times [2021-10-21 20:06:28,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 20:06:28,032 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [249599825] [2021-10-21 20:06:28,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:06:28,032 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 20:06:28,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 20:06:28,033 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 20:06:28,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2021-10-21 20:06:29,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:06:29,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-21 20:06:29,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:06:30,276 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2021-10-21 20:06:30,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 20:06:30,817 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2021-10-21 20:06:30,817 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 20:06:30,817 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [249599825] [2021-10-21 20:06:30,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [249599825] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-21 20:06:30,817 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:06:30,817 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-21 20:06:30,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266618377] [2021-10-21 20:06:30,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-21 20:06:30,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 20:06:30,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-21 20:06:30,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 20:06:30,819 INFO L87 Difference]: Start difference. First operand 2258 states and 3082 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:06:31,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:06:31,029 INFO L93 Difference]: Finished difference Result 5069 states and 6924 transitions. [2021-10-21 20:06:31,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-21 20:06:31,029 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 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 169 [2021-10-21 20:06:31,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:06:31,041 INFO L225 Difference]: With dead ends: 5069 [2021-10-21 20:06:31,041 INFO L226 Difference]: Without dead ends: 2832 [2021-10-21 20:06:31,044 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 335 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 20:06:31,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2832 states. [2021-10-21 20:06:31,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2832 to 2812. [2021-10-21 20:06:31,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2812 states, 2811 states have (on average 1.3628601921024546) internal successors, (3831), 2811 states have internal predecessors, (3831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:06:31,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2812 states to 2812 states and 3831 transitions. [2021-10-21 20:06:31,130 INFO L78 Accepts]: Start accepts. Automaton has 2812 states and 3831 transitions. Word has length 169 [2021-10-21 20:06:31,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:06:31,130 INFO L470 AbstractCegarLoop]: Abstraction has 2812 states and 3831 transitions. [2021-10-21 20:06:31,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:06:31,131 INFO L276 IsEmpty]: Start isEmpty. Operand 2812 states and 3831 transitions. [2021-10-21 20:06:31,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-10-21 20:06:31,134 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:06:31,134 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:06:31,149 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2021-10-21 20:06:31,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 20:06:31,340 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:06:31,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:06:31,340 INFO L82 PathProgramCache]: Analyzing trace with hash -1378389246, now seen corresponding path program 1 times [2021-10-21 20:06:31,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 20:06:31,341 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [106243060] [2021-10-21 20:06:31,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:06:31,341 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 20:06:31,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 20:06:31,342 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 20:06:31,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2021-10-21 20:06:33,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:06:33,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-21 20:06:33,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:06:33,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-21 20:06:33,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-10-21 20:06:33,685 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 130 proven. 0 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2021-10-21 20:06:33,685 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 20:06:34,266 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 130 proven. 0 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2021-10-21 20:06:34,266 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 20:06:34,266 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [106243060] [2021-10-21 20:06:34,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [106243060] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-21 20:06:34,267 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:06:34,267 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-21 20:06:34,267 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667197807] [2021-10-21 20:06:34,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 20:06:34,268 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 20:06:34,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 20:06:34,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-21 20:06:34,269 INFO L87 Difference]: Start difference. First operand 2812 states and 3831 transitions. Second operand has 6 states, 6 states have (on average 20.5) internal successors, (123), 6 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:06:40,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:06:40,450 INFO L93 Difference]: Finished difference Result 4914 states and 6702 transitions. [2021-10-21 20:06:40,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-21 20:06:40,452 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 20.5) internal successors, (123), 6 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 170 [2021-10-21 20:06:40,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:06:40,466 INFO L225 Difference]: With dead ends: 4914 [2021-10-21 20:06:40,467 INFO L226 Difference]: Without dead ends: 2088 [2021-10-21 20:06:40,469 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 334 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 87.1ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-21 20:06:40,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2088 states. [2021-10-21 20:06:40,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2088 to 1807. [2021-10-21 20:06:40,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1807 states, 1806 states have (on average 1.3460686600221483) internal successors, (2431), 1806 states have internal predecessors, (2431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:06:40,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1807 states to 1807 states and 2431 transitions. [2021-10-21 20:06:40,523 INFO L78 Accepts]: Start accepts. Automaton has 1807 states and 2431 transitions. Word has length 170 [2021-10-21 20:06:40,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:06:40,523 INFO L470 AbstractCegarLoop]: Abstraction has 1807 states and 2431 transitions. [2021-10-21 20:06:40,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.5) internal successors, (123), 6 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:06:40,523 INFO L276 IsEmpty]: Start isEmpty. Operand 1807 states and 2431 transitions. [2021-10-21 20:06:40,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2021-10-21 20:06:40,525 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:06:40,525 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:06:40,545 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2021-10-21 20:06:40,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 20:06:40,734 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:06:40,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:06:40,734 INFO L82 PathProgramCache]: Analyzing trace with hash 1353645967, now seen corresponding path program 1 times [2021-10-21 20:06:40,734 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 20:06:40,735 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1589866606] [2021-10-21 20:06:40,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:06:40,735 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 20:06:40,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 20:06:40,736 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 20:06:40,737 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2021-10-21 20:06:43,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:06:43,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 53 conjunts are in the unsatisfiable core [2021-10-21 20:06:43,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:06:44,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 20:06:44,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 20:06:44,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 20:06:44,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 20:06:44,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 20:06:44,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 20:06:44,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 20:06:44,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 20:06:44,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 20:06:44,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 20:06:44,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 2069 treesize of output 2066 [2021-10-21 20:06:44,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 20:06:44,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 2570 treesize of output 2400 [2021-10-21 20:06:44,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 20:06:44,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 20:06:44,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 20:06:44,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 20:06:44,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 20:06:44,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 20:06:44,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 20:06:44,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 20:06:44,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 20:06:44,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 20:06:44,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 20:06:44,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 2220 treesize of output 2032 [2021-10-21 20:06:44,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 2317 treesize of output 2205 [2021-10-21 20:06:44,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 20:06:44,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 20:06:44,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 20:06:44,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 20:06:44,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 20:06:44,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 20:08:51,027 WARN L207 SmtUtils]: Spent 2.11 m on a formula simplification. DAG size of input: 151 DAG size of output: 48 [2021-10-21 20:08:51,028 INFO L354 Elim1Store]: treesize reduction 1048, result has 8.9 percent of original size [2021-10-21 20:08:51,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 9 new quantified variables, introduced 16 case distinctions, treesize of input 2310 treesize of output 2001 [2021-10-21 20:09:45,579 WARN L207 SmtUtils]: Spent 54.51 s on a formula simplification. DAG size of input: 77 DAG size of output: 26 [2021-10-21 20:09:45,580 INFO L354 Elim1Store]: treesize reduction 483, result has 9.4 percent of original size [2021-10-21 20:09:45,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 2338 treesize of output 2330 [2021-10-21 20:09:45,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 20:09:45,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 20:09:45,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 20:09:45,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 20:09:45,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 20:09:45,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 3596 treesize of output 3132 [2021-10-21 20:09:45,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 20:09:45,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 20:09:45,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 20:09:45,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 20:09:45,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 20:09:45,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 20:09:45,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 20:09:45,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 20:09:45,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 20:09:45,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 20:09:45,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 20:09:45,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 20:09:45,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 20:09:45,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 20:09:45,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 20:09:45,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 20:09:45,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 20:09:45,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 20:09:45,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 20:09:45,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 20:09:45,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 15 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 2340 treesize of output 2275 [2021-10-21 20:09:48,569 INFO L354 Elim1Store]: treesize reduction 130, result has 13.9 percent of original size [2021-10-21 20:09:48,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 2248 treesize of output 2162 [2021-10-21 20:09:48,623 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 20:09:48,623 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1589866606] [2021-10-21 20:09:48,624 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Some non-self update cases but no top-level DER relation [2021-10-21 20:09:48,624 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [658367221] [2021-10-21 20:09:48,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:09:48,624 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-21 20:09:48,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/cvc4 [2021-10-21 20:09:48,634 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-21 20:09:48,662 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/cvc4 --incremental --print-success --lang smt (39)] Waiting until timeout for monitored process [2021-10-21 20:10:04,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:10:04,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 60 conjunts are in the unsatisfiable core [2021-10-21 20:10:04,334 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@268c4869 [2021-10-21 20:10:04,334 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750890352] [2021-10-21 20:10:04,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:10:04,334 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:10:04,334 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:10:04,335 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:10:04,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-10-21 20:10:07,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:10:07,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 56 conjunts are in the unsatisfiable core [2021-10-21 20:10:07,053 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@268c4869 [2021-10-21 20:10:07,053 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:10:07,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-10-21 20:10:07,053 ERROR L172 FreeRefinementEngine]: Strategy WOLF failed to provide any proof altough trace is infeasible [2021-10-21 20:10:07,053 INFO L626 BasicCegarLoop]: Counterexample might be feasible [2021-10-21 20:10:07,063 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-21 20:10:07,087 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (38)] Forceful destruction successful, exit code 0 [2021-10-21 20:10:07,283 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/cvc4 --incremental --print-success --lang smt (39)] Forceful destruction successful, exit code 0 [2021-10-21 20:10:07,501 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2021-10-21 20:10:07,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/cvc4 --incremental --print-success --lang smt,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:10:07,673 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-21 20:10:07,730 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.10 08:10:07 BoogieIcfgContainer [2021-10-21 20:10:07,730 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-21 20:10:07,731 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-21 20:10:07,731 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-21 20:10:07,731 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-21 20:10:07,732 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 08:01:41" (3/4) ... [2021-10-21 20:10:07,735 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-21 20:10:07,736 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-21 20:10:07,737 INFO L168 Benchmark]: Toolchain (without parser) took 511586.24 ms. Allocated memory was 54.5 MB in the beginning and 285.2 MB in the end (delta: 230.7 MB). Free memory was 28.2 MB in the beginning and 93.4 MB in the end (delta: -65.2 MB). Peak memory consumption was 164.7 MB. Max. memory is 16.1 GB. [2021-10-21 20:10:07,737 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 54.5 MB. Free memory was 34.5 MB in the beginning and 34.4 MB in the end (delta: 37.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 20:10:07,738 INFO L168 Benchmark]: CACSL2BoogieTranslator took 897.62 ms. Allocated memory was 54.5 MB in the beginning and 69.2 MB in the end (delta: 14.7 MB). Free memory was 28.0 MB in the beginning and 43.5 MB in the end (delta: -15.5 MB). Peak memory consumption was 10.9 MB. Max. memory is 16.1 GB. [2021-10-21 20:10:07,738 INFO L168 Benchmark]: Boogie Procedure Inliner took 121.05 ms. Allocated memory is still 69.2 MB. Free memory was 43.5 MB in the beginning and 38.6 MB in the end (delta: 4.8 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-21 20:10:07,738 INFO L168 Benchmark]: Boogie Preprocessor took 99.42 ms. Allocated memory is still 69.2 MB. Free memory was 38.6 MB in the beginning and 43.2 MB in the end (delta: -4.6 MB). Peak memory consumption was 9.2 MB. Max. memory is 16.1 GB. [2021-10-21 20:10:07,739 INFO L168 Benchmark]: RCFGBuilder took 4677.58 ms. Allocated memory was 69.2 MB in the beginning and 96.5 MB in the end (delta: 27.3 MB). Free memory was 43.0 MB in the beginning and 56.9 MB in the end (delta: -14.0 MB). Peak memory consumption was 30.8 MB. Max. memory is 16.1 GB. [2021-10-21 20:10:07,739 INFO L168 Benchmark]: TraceAbstraction took 505775.62 ms. Allocated memory was 96.5 MB in the beginning and 285.2 MB in the end (delta: 188.7 MB). Free memory was 56.3 MB in the beginning and 93.4 MB in the end (delta: -37.1 MB). Peak memory consumption was 151.4 MB. Max. memory is 16.1 GB. [2021-10-21 20:10:07,740 INFO L168 Benchmark]: Witness Printer took 4.86 ms. Allocated memory is still 285.2 MB. Free memory is still 93.4 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 20:10:07,742 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 54.5 MB. Free memory was 34.5 MB in the beginning and 34.4 MB in the end (delta: 37.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 897.62 ms. Allocated memory was 54.5 MB in the beginning and 69.2 MB in the end (delta: 14.7 MB). Free memory was 28.0 MB in the beginning and 43.5 MB in the end (delta: -15.5 MB). Peak memory consumption was 10.9 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 121.05 ms. Allocated memory is still 69.2 MB. Free memory was 43.5 MB in the beginning and 38.6 MB in the end (delta: 4.8 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 99.42 ms. Allocated memory is still 69.2 MB. Free memory was 38.6 MB in the beginning and 43.2 MB in the end (delta: -4.6 MB). Peak memory consumption was 9.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 4677.58 ms. Allocated memory was 69.2 MB in the beginning and 96.5 MB in the end (delta: 27.3 MB). Free memory was 43.0 MB in the beginning and 56.9 MB in the end (delta: -14.0 MB). Peak memory consumption was 30.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 505775.62 ms. Allocated memory was 96.5 MB in the beginning and 285.2 MB in the end (delta: 188.7 MB). Free memory was 56.3 MB in the beginning and 93.4 MB in the end (delta: -37.1 MB). Peak memory consumption was 151.4 MB. Max. memory is 16.1 GB. * Witness Printer took 4.86 ms. Allocated memory is still 285.2 MB. Free memory is still 93.4 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 1794]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L1054] static int init = 1; [L1055] static SSL_METHOD SSLv3_server_data ; [L1077] SSL *s ; [L1078] int tmp ; [L1082] s = malloc(sizeof(SSL)) [L1083] s->s3 = malloc(sizeof(struct ssl3_state_st)) [L1084] s->ctx = malloc(sizeof(SSL_CTX)) [L1085] s->session = malloc(sizeof(SSL_SESSION)) [L1087] s->info_callback = (void (*) ()) __VERIFIER_nondet_ulong() [L1088] s->options = __VERIFIER_nondet_ulong() [L1089] s->verify_mode = __VERIFIER_nondet_int() [L1090] EXPR s->session [L1090] (s->session)->peer = (struct x509_st*) __VERIFIER_nondet_ulong() [L1091] EXPR s->s3 [L1091] (s->s3)->tmp.cert_request = __VERIFIER_nondet_int() [L1092] EXPR s->s3 [L1092] (s->s3)->tmp.new_cipher = malloc(sizeof(struct ssl_cipher_st)) [L1093] EXPR s->s3 [L1093] EXPR (s->s3)->tmp.new_cipher [L1093] ((s->s3)->tmp.new_cipher)->algorithms = __VERIFIER_nondet_ulong() [L1094] EXPR s->s3 [L1094] EXPR (s->s3)->tmp.new_cipher [L1094] ((s->s3)->tmp.new_cipher)->algo_strength = __VERIFIER_nondet_ulong() [L1095] COND FALSE !(__VERIFIER_nondet_int()) [L1101] s->cert = malloc(sizeof(struct cert_st)) [L1102] EXPR s->cert [L1102] (s->cert)->pkeys[0].privatekey = (struct evp_pkey_st*) __VERIFIER_nondet_ulong() [L1112] BUF_MEM *buf ; [L1113] unsigned long l ; [L1114] unsigned long Time ; [L1115] unsigned long tmp ; [L1116] void (*cb)() ; [L1117] long num1 ; [L1118] int ret ; [L1119] int new_state ; [L1120] int state ; [L1121] int skip ; [L1122] int got_new_session ; [L1123] int tmp___1 = __VERIFIER_nondet_int() ; [L1124] int tmp___2 = __VERIFIER_nondet_int() ; [L1125] int tmp___3 = __VERIFIER_nondet_int() ; [L1126] int tmp___4 = __VERIFIER_nondet_int() ; [L1127] int tmp___5 = __VERIFIER_nondet_int() ; [L1128] int tmp___6 = __VERIFIER_nondet_int() ; [L1129] int tmp___7 ; [L1130] long tmp___8 = __VERIFIER_nondet_long() ; [L1131] int tmp___9 = __VERIFIER_nondet_int() ; [L1132] int tmp___10 = __VERIFIER_nondet_int() ; [L1133] int blastFlag ; [L1137] s->state = 8464 [L1138] blastFlag = 0 [L1139] s->hit=__VERIFIER_nondet_int () [L1140] s->state = 8464 [L1141] tmp = __VERIFIER_nondet_int() [L1142] Time = tmp [L1143] cb = (void (*)())((void *)0) [L1144] ret = -1 [L1145] skip = 0 [L1146] got_new_session = 0 [L1147] EXPR s->info_callback [L1147] COND TRUE (unsigned long )s->info_callback != (unsigned long )((void *)0) [L1148] EXPR s->info_callback [L1148] cb = s->info_callback [L1152] EXPR s->in_handshake [L1152] s->in_handshake += 1 [L1153] COND FALSE !(tmp___1 & 12288) [L1162] EXPR s->cert [L1162] COND FALSE !((unsigned long )s->cert == (unsigned long )((void *)0)) [L1168] COND TRUE 1 [L1170] EXPR s->state [L1170] state = s->state [L1171] EXPR s->state [L1171] COND FALSE !(s->state == 12292) [L1174] EXPR s->state [L1174] COND FALSE !(s->state == 16384) [L1177] EXPR s->state [L1177] COND FALSE !(s->state == 8192) [L1180] EXPR s->state [L1180] COND FALSE !(s->state == 24576) [L1183] EXPR s->state [L1183] COND FALSE !(s->state == 8195) [L1186] EXPR s->state [L1186] COND FALSE !(s->state == 8480) [L1189] EXPR s->state [L1189] COND FALSE !(s->state == 8481) [L1192] EXPR s->state [L1192] COND FALSE !(s->state == 8482) [L1195] EXPR s->state [L1195] COND TRUE s->state == 8464 [L1355] s->shutdown = 0 [L1356] ret = __VERIFIER_nondet_int() [L1357] COND TRUE blastFlag == 0 [L1358] blastFlag = 1 [L1362] COND FALSE !(ret <= 0) [L1367] got_new_session = 1 [L1368] s->state = 8496 [L1369] s->init_num = 0 [L1753] EXPR s->s3 [L1753] EXPR (s->s3)->tmp.reuse_message [L1753] COND FALSE !(! (s->s3)->tmp.reuse_message) [L1782] skip = 0 [L1168] COND TRUE 1 [L1170] EXPR s->state [L1170] state = s->state [L1171] EXPR s->state [L1171] COND FALSE !(s->state == 12292) [L1174] EXPR s->state [L1174] COND FALSE !(s->state == 16384) [L1177] EXPR s->state [L1177] COND FALSE !(s->state == 8192) [L1180] EXPR s->state [L1180] COND FALSE !(s->state == 24576) [L1183] EXPR s->state [L1183] COND FALSE !(s->state == 8195) [L1186] EXPR s->state [L1186] COND FALSE !(s->state == 8480) [L1189] EXPR s->state [L1189] COND FALSE !(s->state == 8481) [L1192] EXPR s->state [L1192] COND FALSE !(s->state == 8482) [L1195] EXPR s->state [L1195] COND FALSE !(s->state == 8464) [L1198] EXPR s->state [L1198] COND FALSE !(s->state == 8465) [L1201] EXPR s->state [L1201] COND FALSE !(s->state == 8466) [L1204] EXPR s->state [L1204] COND TRUE s->state == 8496 [L1373] ret = __VERIFIER_nondet_int() [L1374] COND TRUE blastFlag == 1 [L1375] blastFlag = 2 [L1379] COND FALSE !(ret <= 0) [L1384] s->hit [L1384] COND TRUE s->hit [L1385] s->state = 8656 [L1389] s->init_num = 0 [L1753] EXPR s->s3 [L1753] EXPR (s->s3)->tmp.reuse_message [L1753] COND FALSE !(! (s->s3)->tmp.reuse_message) [L1782] skip = 0 [L1168] COND TRUE 1 [L1170] EXPR s->state [L1170] state = s->state [L1171] EXPR s->state [L1171] COND FALSE !(s->state == 12292) [L1174] EXPR s->state [L1174] COND FALSE !(s->state == 16384) [L1177] EXPR s->state [L1177] COND FALSE !(s->state == 8192) [L1180] EXPR s->state [L1180] COND FALSE !(s->state == 24576) [L1183] EXPR s->state [L1183] COND FALSE !(s->state == 8195) [L1186] EXPR s->state [L1186] COND FALSE !(s->state == 8480) [L1189] EXPR s->state [L1189] COND FALSE !(s->state == 8481) [L1192] EXPR s->state [L1192] COND FALSE !(s->state == 8482) [L1195] EXPR s->state [L1195] COND FALSE !(s->state == 8464) [L1198] EXPR s->state [L1198] COND FALSE !(s->state == 8465) [L1201] EXPR s->state [L1201] COND FALSE !(s->state == 8466) [L1204] EXPR s->state [L1204] COND FALSE !(s->state == 8496) [L1207] EXPR s->state [L1207] COND FALSE !(s->state == 8497) [L1210] EXPR s->state [L1210] COND FALSE !(s->state == 8512) [L1213] EXPR s->state [L1213] COND FALSE !(s->state == 8513) [L1216] EXPR s->state [L1216] COND FALSE !(s->state == 8528) [L1219] EXPR s->state [L1219] COND FALSE !(s->state == 8529) [L1222] EXPR s->state [L1222] COND FALSE !(s->state == 8544) [L1225] EXPR s->state [L1225] COND FALSE !(s->state == 8545) [L1228] EXPR s->state [L1228] COND FALSE !(s->state == 8560) [L1231] EXPR s->state [L1231] COND FALSE !(s->state == 8561) [L1234] EXPR s->state [L1234] COND FALSE !(s->state == 8448) [L1237] EXPR s->state [L1237] COND FALSE !(s->state == 8576) [L1240] EXPR s->state [L1240] COND FALSE !(s->state == 8577) [L1243] EXPR s->state [L1243] COND FALSE !(s->state == 8592) [L1246] EXPR s->state [L1246] COND FALSE !(s->state == 8593) [L1249] EXPR s->state [L1249] COND FALSE !(s->state == 8608) [L1252] EXPR s->state [L1252] COND FALSE !(s->state == 8609) [L1255] EXPR s->state [L1255] COND FALSE !(s->state == 8640) [L1258] EXPR s->state [L1258] COND FALSE !(s->state == 8641) [L1261] EXPR s->state [L1261] COND TRUE s->state == 8656 [L1630] EXPR s->session [L1630] EXPR s->s3 [L1630] EXPR (s->s3)->tmp.new_cipher [L1630] (s->session)->cipher = (s->s3)->tmp.new_cipher [L1631] COND FALSE !(! tmp___9) [L1637] ret = __VERIFIER_nondet_int() [L1638] COND FALSE !(blastFlag == 10) [L1641] COND FALSE !(blastFlag == 13) [L1644] COND FALSE !(blastFlag == 16) [L1651] COND FALSE !(ret <= 0) [L1656] s->state = 8672 [L1657] s->init_num = 0 [L1658] COND FALSE !(! tmp___10) [L1753] EXPR s->s3 [L1753] EXPR (s->s3)->tmp.reuse_message [L1753] COND FALSE !(! (s->s3)->tmp.reuse_message) [L1782] skip = 0 [L1168] COND TRUE 1 [L1170] EXPR s->state [L1170] state = s->state [L1171] EXPR s->state [L1171] COND FALSE !(s->state == 12292) [L1174] EXPR s->state [L1174] COND FALSE !(s->state == 16384) [L1177] EXPR s->state [L1177] COND FALSE !(s->state == 8192) [L1180] EXPR s->state [L1180] COND FALSE !(s->state == 24576) [L1183] EXPR s->state [L1183] COND FALSE !(s->state == 8195) [L1186] EXPR s->state [L1186] COND FALSE !(s->state == 8480) [L1189] EXPR s->state [L1189] COND FALSE !(s->state == 8481) [L1192] EXPR s->state [L1192] COND FALSE !(s->state == 8482) [L1195] EXPR s->state [L1195] COND FALSE !(s->state == 8464) [L1198] EXPR s->state [L1198] COND FALSE !(s->state == 8465) [L1201] EXPR s->state [L1201] COND FALSE !(s->state == 8466) [L1204] EXPR s->state [L1204] COND FALSE !(s->state == 8496) [L1207] EXPR s->state [L1207] COND FALSE !(s->state == 8497) [L1210] EXPR s->state [L1210] COND FALSE !(s->state == 8512) [L1213] EXPR s->state [L1213] COND FALSE !(s->state == 8513) [L1216] EXPR s->state [L1216] COND FALSE !(s->state == 8528) [L1219] EXPR s->state [L1219] COND FALSE !(s->state == 8529) [L1222] EXPR s->state [L1222] COND FALSE !(s->state == 8544) [L1225] EXPR s->state [L1225] COND FALSE !(s->state == 8545) [L1228] EXPR s->state [L1228] COND FALSE !(s->state == 8560) [L1231] EXPR s->state [L1231] COND FALSE !(s->state == 8561) [L1234] EXPR s->state [L1234] COND FALSE !(s->state == 8448) [L1237] EXPR s->state [L1237] COND FALSE !(s->state == 8576) [L1240] EXPR s->state [L1240] COND FALSE !(s->state == 8577) [L1243] EXPR s->state [L1243] COND FALSE !(s->state == 8592) [L1246] EXPR s->state [L1246] COND FALSE !(s->state == 8593) [L1249] EXPR s->state [L1249] COND FALSE !(s->state == 8608) [L1252] EXPR s->state [L1252] COND FALSE !(s->state == 8609) [L1255] EXPR s->state [L1255] COND FALSE !(s->state == 8640) [L1258] EXPR s->state [L1258] COND FALSE !(s->state == 8641) [L1261] EXPR s->state [L1261] COND FALSE !(s->state == 8656) [L1264] EXPR s->state [L1264] COND FALSE !(s->state == 8657) [L1267] EXPR s->state [L1267] COND TRUE s->state == 8672 [L1667] ret = __VERIFIER_nondet_int() [L1668] COND FALSE !(blastFlag == 11) [L1671] COND FALSE !(blastFlag == 14) [L1674] COND FALSE !(blastFlag == 17) [L1681] COND FALSE !(ret <= 0) [L1686] s->state = 8448 [L1687] s->hit [L1687] COND TRUE s->hit [L1688] EXPR s->s3 [L1688] (s->s3)->tmp.next_state = 8640 [L1692] s->init_num = 0 [L1753] EXPR s->s3 [L1753] EXPR (s->s3)->tmp.reuse_message [L1753] COND FALSE !(! (s->s3)->tmp.reuse_message) [L1782] skip = 0 [L1168] COND TRUE 1 [L1170] EXPR s->state [L1170] state = s->state [L1171] EXPR s->state [L1171] COND FALSE !(s->state == 12292) [L1174] EXPR s->state [L1174] COND FALSE !(s->state == 16384) [L1177] EXPR s->state [L1177] COND FALSE !(s->state == 8192) [L1180] EXPR s->state [L1180] COND FALSE !(s->state == 24576) [L1183] EXPR s->state [L1183] COND FALSE !(s->state == 8195) [L1186] EXPR s->state [L1186] COND FALSE !(s->state == 8480) [L1189] EXPR s->state [L1189] COND FALSE !(s->state == 8481) [L1192] EXPR s->state [L1192] COND FALSE !(s->state == 8482) [L1195] EXPR s->state [L1195] COND FALSE !(s->state == 8464) [L1198] EXPR s->state [L1198] COND FALSE !(s->state == 8465) [L1201] EXPR s->state [L1201] COND FALSE !(s->state == 8466) [L1204] EXPR s->state [L1204] COND FALSE !(s->state == 8496) [L1207] EXPR s->state [L1207] COND FALSE !(s->state == 8497) [L1210] EXPR s->state [L1210] COND FALSE !(s->state == 8512) [L1213] EXPR s->state [L1213] COND FALSE !(s->state == 8513) [L1216] EXPR s->state [L1216] COND FALSE !(s->state == 8528) [L1219] EXPR s->state [L1219] COND FALSE !(s->state == 8529) [L1222] EXPR s->state [L1222] COND FALSE !(s->state == 8544) [L1225] EXPR s->state [L1225] COND FALSE !(s->state == 8545) [L1228] EXPR s->state [L1228] COND FALSE !(s->state == 8560) [L1231] EXPR s->state [L1231] COND FALSE !(s->state == 8561) [L1234] EXPR s->state [L1234] COND FALSE !(s->state == 8448) [L1237] EXPR s->state [L1237] COND FALSE !(s->state == 8576) [L1240] EXPR s->state [L1240] COND FALSE !(s->state == 8577) [L1243] EXPR s->state [L1243] COND FALSE !(s->state == 8592) [L1246] EXPR s->state [L1246] COND FALSE !(s->state == 8593) [L1249] EXPR s->state [L1249] COND FALSE !(s->state == 8608) [L1252] EXPR s->state [L1252] COND FALSE !(s->state == 8609) [L1255] EXPR s->state [L1255] COND TRUE s->state == 8640 [L1602] ret = __VERIFIER_nondet_int() [L1603] COND FALSE !(blastFlag == 9) [L1606] COND FALSE !(blastFlag == 12) [L1609] COND FALSE !(blastFlag == 15) [L1794] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 158 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 505633.2ms, OverallIterations: 37, TraceHistogramMax: 6, EmptinessCheckTime: 97.4ms, AutomataDifference: 220161.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 19.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 6402 SDtfs, 6964 SDslu, 16604 SDs, 0 SdLazy, 13526 SolverSat, 2166 SolverUnsat, 45 SolverUnknown, 0 SolverNotchecked, 203925.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 8418 GetRequests, 8211 SyntacticMatches, 9 SemanticMatches, 198 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 3536.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=2812occurred in iteration=35, InterpolantAutomatonStates: 204, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 914.5ms AutomataMinimizationTime, 36 MinimizatonAttempts, 4503 StatesRemovedByMinimization, 35 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1164.8ms SsaConstructionTime, 5991.3ms SatisfiabilityAnalysisTime, 36949.4ms InterpolantComputationTime, 4213 NumberOfCodeBlocks, 4213 NumberOfCodeBlocksAsserted, 36 NumberOfCheckSat, 8354 ConstructedInterpolants, 1 QuantifiedInterpolants, 21232 SizeOfPredicates, 108 NumberOfNonLiveVariables, 11328 ConjunctsInSsa, 127 ConjunctsInUnsatCore, 72 InterpolantComputations, 72 PerfectInterpolantSequences, 7806/7806 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-10-21 20:10:07,866 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77c1f3f-22e9-4b40-b4e2-d2f354896745/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...