./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/forester-heap/dll-token-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f8e1c903 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e879c0e6-a86a-4b59-b907-11787051e93f/bin/uautomizer-IVEQpCNsaX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e879c0e6-a86a-4b59-b907-11787051e93f/bin/uautomizer-IVEQpCNsaX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e879c0e6-a86a-4b59-b907-11787051e93f/bin/uautomizer-IVEQpCNsaX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e879c0e6-a86a-4b59-b907-11787051e93f/bin/uautomizer-IVEQpCNsaX/config/AutomizerReach.xml -i ../../sv-benchmarks/c/forester-heap/dll-token-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e879c0e6-a86a-4b59-b907-11787051e93f/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e879c0e6-a86a-4b59-b907-11787051e93f/bin/uautomizer-IVEQpCNsaX --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 26e745e5a6378d1005b5b65d8cf35b442871742f5efbed2506d4a18acf4ab9a5 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-f8e1c90 [2021-11-09 08:42:20,318 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-09 08:42:20,321 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-09 08:42:20,368 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-09 08:42:20,369 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-09 08:42:20,370 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-09 08:42:20,373 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-09 08:42:20,376 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-09 08:42:20,379 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-09 08:42:20,380 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-09 08:42:20,382 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-09 08:42:20,384 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-09 08:42:20,385 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-09 08:42:20,387 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-09 08:42:20,389 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-09 08:42:20,390 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-09 08:42:20,391 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-09 08:42:20,393 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-09 08:42:20,396 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-09 08:42:20,402 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-09 08:42:20,404 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-09 08:42:20,411 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-09 08:42:20,414 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-09 08:42:20,416 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-09 08:42:20,423 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-09 08:42:20,430 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-09 08:42:20,431 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-09 08:42:20,432 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-09 08:42:20,433 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-09 08:42:20,434 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-09 08:42:20,434 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-09 08:42:20,435 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-09 08:42:20,437 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-09 08:42:20,438 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-09 08:42:20,439 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-09 08:42:20,439 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-09 08:42:20,440 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-09 08:42:20,440 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-09 08:42:20,441 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-09 08:42:20,442 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-09 08:42:20,443 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-09 08:42:20,444 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e879c0e6-a86a-4b59-b907-11787051e93f/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-09 08:42:20,475 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-09 08:42:20,475 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-09 08:42:20,475 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-09 08:42:20,476 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-09 08:42:20,477 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-09 08:42:20,477 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-09 08:42:20,477 INFO L138 SettingsManager]: * Use SBE=true [2021-11-09 08:42:20,478 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-09 08:42:20,478 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-09 08:42:20,478 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-09 08:42:20,478 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-09 08:42:20,479 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-09 08:42:20,479 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-09 08:42:20,479 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-09 08:42:20,479 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-09 08:42:20,479 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-09 08:42:20,482 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-09 08:42:20,482 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-09 08:42:20,483 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-09 08:42:20,483 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-09 08:42:20,483 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-09 08:42:20,484 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-09 08:42:20,484 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 08:42:20,485 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-09 08:42:20,485 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-09 08:42:20,485 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-09 08:42:20,485 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-09 08:42:20,486 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-09 08:42:20,487 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-09 08:42:20,489 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-09 08:42:20,489 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-09 08:42:20,489 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-09 08:42:20,490 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_e879c0e6-a86a-4b59-b907-11787051e93f/bin/uautomizer-IVEQpCNsaX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e879c0e6-a86a-4b59-b907-11787051e93f/bin/uautomizer-IVEQpCNsaX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 26e745e5a6378d1005b5b65d8cf35b442871742f5efbed2506d4a18acf4ab9a5 [2021-11-09 08:42:20,930 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-09 08:42:20,959 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-09 08:42:20,962 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-09 08:42:20,964 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-09 08:42:20,965 INFO L275 PluginConnector]: CDTParser initialized [2021-11-09 08:42:20,966 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e879c0e6-a86a-4b59-b907-11787051e93f/bin/uautomizer-IVEQpCNsaX/../../sv-benchmarks/c/forester-heap/dll-token-1.i [2021-11-09 08:42:21,052 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e879c0e6-a86a-4b59-b907-11787051e93f/bin/uautomizer-IVEQpCNsaX/data/5734531c5/f31eb381dcce4ceeadfd0e576865a1fb/FLAG2589fb8cc [2021-11-09 08:42:21,667 INFO L306 CDTParser]: Found 1 translation units. [2021-11-09 08:42:21,668 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e879c0e6-a86a-4b59-b907-11787051e93f/sv-benchmarks/c/forester-heap/dll-token-1.i [2021-11-09 08:42:21,683 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e879c0e6-a86a-4b59-b907-11787051e93f/bin/uautomizer-IVEQpCNsaX/data/5734531c5/f31eb381dcce4ceeadfd0e576865a1fb/FLAG2589fb8cc [2021-11-09 08:42:21,929 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e879c0e6-a86a-4b59-b907-11787051e93f/bin/uautomizer-IVEQpCNsaX/data/5734531c5/f31eb381dcce4ceeadfd0e576865a1fb [2021-11-09 08:42:21,933 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-09 08:42:21,935 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-09 08:42:21,937 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-09 08:42:21,937 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-09 08:42:21,942 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-09 08:42:21,943 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 08:42:21" (1/1) ... [2021-11-09 08:42:21,944 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c642e0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:42:21, skipping insertion in model container [2021-11-09 08:42:21,945 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 08:42:21" (1/1) ... [2021-11-09 08:42:21,953 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-09 08:42:21,998 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-09 08:42:22,387 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_e879c0e6-a86a-4b59-b907-11787051e93f/sv-benchmarks/c/forester-heap/dll-token-1.i[22229,22242] [2021-11-09 08:42:22,408 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_e879c0e6-a86a-4b59-b907-11787051e93f/sv-benchmarks/c/forester-heap/dll-token-1.i[22398,22411] [2021-11-09 08:42:22,412 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_e879c0e6-a86a-4b59-b907-11787051e93f/sv-benchmarks/c/forester-heap/dll-token-1.i[22489,22502] [2021-11-09 08:42:22,416 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_e879c0e6-a86a-4b59-b907-11787051e93f/sv-benchmarks/c/forester-heap/dll-token-1.i[22571,22584] [2021-11-09 08:42:22,439 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_e879c0e6-a86a-4b59-b907-11787051e93f/sv-benchmarks/c/forester-heap/dll-token-1.i[22649,22662] [2021-11-09 08:42:22,441 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_e879c0e6-a86a-4b59-b907-11787051e93f/sv-benchmarks/c/forester-heap/dll-token-1.i[22795,22808] [2021-11-09 08:42:22,445 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 08:42:22,465 INFO L203 MainTranslator]: Completed pre-run [2021-11-09 08:42:22,565 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_e879c0e6-a86a-4b59-b907-11787051e93f/sv-benchmarks/c/forester-heap/dll-token-1.i[22229,22242] [2021-11-09 08:42:22,568 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_e879c0e6-a86a-4b59-b907-11787051e93f/sv-benchmarks/c/forester-heap/dll-token-1.i[22398,22411] [2021-11-09 08:42:22,570 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_e879c0e6-a86a-4b59-b907-11787051e93f/sv-benchmarks/c/forester-heap/dll-token-1.i[22489,22502] [2021-11-09 08:42:22,572 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_e879c0e6-a86a-4b59-b907-11787051e93f/sv-benchmarks/c/forester-heap/dll-token-1.i[22571,22584] [2021-11-09 08:42:22,573 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_e879c0e6-a86a-4b59-b907-11787051e93f/sv-benchmarks/c/forester-heap/dll-token-1.i[22649,22662] [2021-11-09 08:42:22,576 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_e879c0e6-a86a-4b59-b907-11787051e93f/sv-benchmarks/c/forester-heap/dll-token-1.i[22795,22808] [2021-11-09 08:42:22,578 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 08:42:22,615 INFO L208 MainTranslator]: Completed translation [2021-11-09 08:42:22,616 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:42:22 WrapperNode [2021-11-09 08:42:22,616 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-09 08:42:22,618 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-09 08:42:22,618 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-09 08:42:22,619 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-09 08:42:22,628 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:42:22" (1/1) ... [2021-11-09 08:42:22,658 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:42:22" (1/1) ... [2021-11-09 08:42:22,693 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-09 08:42:22,694 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-09 08:42:22,695 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-09 08:42:22,695 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-09 08:42:22,706 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:42:22" (1/1) ... [2021-11-09 08:42:22,707 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:42:22" (1/1) ... [2021-11-09 08:42:22,714 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:42:22" (1/1) ... [2021-11-09 08:42:22,715 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:42:22" (1/1) ... [2021-11-09 08:42:22,726 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:42:22" (1/1) ... [2021-11-09 08:42:22,734 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:42:22" (1/1) ... [2021-11-09 08:42:22,737 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:42:22" (1/1) ... [2021-11-09 08:42:22,741 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-09 08:42:22,742 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-09 08:42:22,742 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-09 08:42:22,743 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-09 08:42:22,749 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:42:22" (1/1) ... [2021-11-09 08:42:22,759 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 08:42:22,782 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e879c0e6-a86a-4b59-b907-11787051e93f/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:42:22,797 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e879c0e6-a86a-4b59-b907-11787051e93f/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-09 08:42:22,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e879c0e6-a86a-4b59-b907-11787051e93f/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-09 08:42:22,845 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-09 08:42:22,845 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-09 08:42:22,845 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-09 08:42:22,846 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-09 08:42:22,846 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-09 08:42:22,846 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-09 08:42:22,846 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-09 08:42:22,847 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-09 08:42:22,847 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-09 08:42:22,847 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-09 08:42:23,389 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-09 08:42:23,389 INFO L299 CfgBuilder]: Removed 19 assume(true) statements. [2021-11-09 08:42:23,392 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 08:42:23 BoogieIcfgContainer [2021-11-09 08:42:23,392 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-09 08:42:23,394 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-09 08:42:23,394 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-09 08:42:23,399 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-09 08:42:23,399 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 08:42:21" (1/3) ... [2021-11-09 08:42:23,401 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c990b75 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 08:42:23, skipping insertion in model container [2021-11-09 08:42:23,401 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:42:22" (2/3) ... [2021-11-09 08:42:23,401 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c990b75 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 08:42:23, skipping insertion in model container [2021-11-09 08:42:23,402 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 08:42:23" (3/3) ... [2021-11-09 08:42:23,403 INFO L111 eAbstractionObserver]: Analyzing ICFG dll-token-1.i [2021-11-09 08:42:23,409 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-09 08:42:23,410 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2021-11-09 08:42:23,463 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-09 08:42:23,471 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-09 08:42:23,471 INFO L340 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-11-09 08:42:23,490 INFO L276 IsEmpty]: Start isEmpty. Operand has 44 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 43 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:42:23,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-09 08:42:23,496 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:42:23,497 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-09 08:42:23,498 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-09 08:42:23,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:42:23,504 INFO L85 PathProgramCache]: Analyzing trace with hash 890337990, now seen corresponding path program 1 times [2021-11-09 08:42:23,515 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:42:23,515 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796184622] [2021-11-09 08:42:23,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:42:23,517 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:42:23,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:42:23,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:42:23,695 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:42:23,696 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796184622] [2021-11-09 08:42:23,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796184622] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:42:23,697 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:42:23,698 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-09 08:42:23,700 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293954950] [2021-11-09 08:42:23,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-09 08:42:23,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:42:23,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-09 08:42:23,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-09 08:42:23,725 INFO L87 Difference]: Start difference. First operand has 44 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 43 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:42:23,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:42:23,745 INFO L93 Difference]: Finished difference Result 86 states and 132 transitions. [2021-11-09 08:42:23,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-09 08:42:23,746 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 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 6 [2021-11-09 08:42:23,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:42:23,755 INFO L225 Difference]: With dead ends: 86 [2021-11-09 08:42:23,755 INFO L226 Difference]: Without dead ends: 39 [2021-11-09 08:42:23,758 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-09 08:42:23,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-11-09 08:42:23,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-11-09 08:42:23,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 38 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:42:23,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2021-11-09 08:42:23,791 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 6 [2021-11-09 08:42:23,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:42:23,792 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2021-11-09 08:42:23,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:42:23,792 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2021-11-09 08:42:23,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-09 08:42:23,805 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:42:23,805 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-09 08:42:23,805 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-09 08:42:23,806 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-09 08:42:23,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:42:23,807 INFO L85 PathProgramCache]: Analyzing trace with hash 889571369, now seen corresponding path program 1 times [2021-11-09 08:42:23,807 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:42:23,807 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665819825] [2021-11-09 08:42:23,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:42:23,808 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:42:23,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:42:23,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:42:23,995 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:42:23,996 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665819825] [2021-11-09 08:42:23,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665819825] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:42:23,996 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:42:23,997 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 08:42:23,997 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202056266] [2021-11-09 08:42:23,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 08:42:23,999 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:42:24,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 08:42:24,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:42:24,001 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:42:24,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:42:24,115 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2021-11-09 08:42:24,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 08:42:24,119 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 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 6 [2021-11-09 08:42:24,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:42:24,122 INFO L225 Difference]: With dead ends: 39 [2021-11-09 08:42:24,123 INFO L226 Difference]: Without dead ends: 37 [2021-11-09 08:42:24,124 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 08:42:24,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-11-09 08:42:24,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-11-09 08:42:24,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 32 states have (on average 1.21875) internal successors, (39), 36 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:42:24,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2021-11-09 08:42:24,133 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 6 [2021-11-09 08:42:24,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:42:24,134 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2021-11-09 08:42:24,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:42:24,134 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2021-11-09 08:42:24,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-09 08:42:24,134 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:42:24,135 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:42:24,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-09 08:42:24,135 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-09 08:42:24,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:42:24,136 INFO L85 PathProgramCache]: Analyzing trace with hash 1806865149, now seen corresponding path program 1 times [2021-11-09 08:42:24,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:42:24,136 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111218329] [2021-11-09 08:42:24,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:42:24,137 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:42:24,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:42:24,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:42:24,225 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:42:24,225 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111218329] [2021-11-09 08:42:24,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111218329] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:42:24,226 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:42:24,226 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 08:42:24,226 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868292750] [2021-11-09 08:42:24,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 08:42:24,227 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:42:24,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 08:42:24,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:42:24,229 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:42:24,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:42:24,303 INFO L93 Difference]: Finished difference Result 63 states and 66 transitions. [2021-11-09 08:42:24,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 08:42:24,304 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 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 7 [2021-11-09 08:42:24,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:42:24,305 INFO L225 Difference]: With dead ends: 63 [2021-11-09 08:42:24,305 INFO L226 Difference]: Without dead ends: 61 [2021-11-09 08:42:24,306 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 08:42:24,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-11-09 08:42:24,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 35. [2021-11-09 08:42:24,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 34 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:42:24,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2021-11-09 08:42:24,314 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 7 [2021-11-09 08:42:24,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:42:24,314 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2021-11-09 08:42:24,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:42:24,315 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2021-11-09 08:42:24,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-09 08:42:24,315 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:42:24,316 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:42:24,316 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-09 08:42:24,316 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-09 08:42:24,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:42:24,317 INFO L85 PathProgramCache]: Analyzing trace with hash -913382283, now seen corresponding path program 1 times [2021-11-09 08:42:24,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:42:24,318 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725805482] [2021-11-09 08:42:24,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:42:24,318 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:42:24,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:42:24,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:42:24,390 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:42:24,391 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725805482] [2021-11-09 08:42:24,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725805482] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:42:24,391 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:42:24,391 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-09 08:42:24,392 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338317436] [2021-11-09 08:42:24,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 08:42:24,392 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:42:24,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 08:42:24,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-09 08:42:24,394 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:42:24,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:42:24,498 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2021-11-09 08:42:24,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-09 08:42:24,499 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 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 12 [2021-11-09 08:42:24,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:42:24,500 INFO L225 Difference]: With dead ends: 35 [2021-11-09 08:42:24,501 INFO L226 Difference]: Without dead ends: 33 [2021-11-09 08:42:24,501 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-09 08:42:24,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-11-09 08:42:24,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-11-09 08:42:24,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 32 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:42:24,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2021-11-09 08:42:24,507 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 12 [2021-11-09 08:42:24,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:42:24,508 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2021-11-09 08:42:24,508 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:42:24,508 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2021-11-09 08:42:24,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-09 08:42:24,509 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:42:24,509 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:42:24,510 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-09 08:42:24,510 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-09 08:42:24,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:42:24,511 INFO L85 PathProgramCache]: Analyzing trace with hash -913344547, now seen corresponding path program 1 times [2021-11-09 08:42:24,511 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:42:24,511 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988172783] [2021-11-09 08:42:24,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:42:24,512 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:42:24,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:42:24,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:42:24,753 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:42:24,753 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988172783] [2021-11-09 08:42:24,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988172783] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:42:24,755 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:42:24,755 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-09 08:42:24,756 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105511340] [2021-11-09 08:42:24,756 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-09 08:42:24,756 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:42:24,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-09 08:42:24,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-09 08:42:24,757 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:42:25,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:42:25,121 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2021-11-09 08:42:25,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-09 08:42:25,122 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 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 12 [2021-11-09 08:42:25,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:42:25,123 INFO L225 Difference]: With dead ends: 50 [2021-11-09 08:42:25,123 INFO L226 Difference]: Without dead ends: 48 [2021-11-09 08:42:25,123 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-09 08:42:25,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-11-09 08:42:25,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2021-11-09 08:42:25,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 39 states have (on average 1.1794871794871795) internal successors, (46), 41 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:42:25,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2021-11-09 08:42:25,132 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 12 [2021-11-09 08:42:25,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:42:25,133 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2021-11-09 08:42:25,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:42:25,133 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2021-11-09 08:42:25,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-09 08:42:25,134 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:42:25,135 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:42:25,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-09 08:42:25,135 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-09 08:42:25,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:42:25,136 INFO L85 PathProgramCache]: Analyzing trace with hash -313255267, now seen corresponding path program 1 times [2021-11-09 08:42:25,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:42:25,137 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462648638] [2021-11-09 08:42:25,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:42:25,137 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:42:25,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:42:25,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:42:25,337 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:42:25,338 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462648638] [2021-11-09 08:42:25,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462648638] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:42:25,338 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:42:25,339 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-09 08:42:25,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62799932] [2021-11-09 08:42:25,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 08:42:25,340 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:42:25,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 08:42:25,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-09 08:42:25,341 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:42:25,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:42:25,568 INFO L93 Difference]: Finished difference Result 66 states and 71 transitions. [2021-11-09 08:42:25,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 08:42:25,568 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 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 16 [2021-11-09 08:42:25,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:42:25,569 INFO L225 Difference]: With dead ends: 66 [2021-11-09 08:42:25,569 INFO L226 Difference]: Without dead ends: 64 [2021-11-09 08:42:25,570 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-09 08:42:25,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-11-09 08:42:25,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 48. [2021-11-09 08:42:25,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 45 states have (on average 1.1555555555555554) internal successors, (52), 47 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:42:25,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2021-11-09 08:42:25,577 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 16 [2021-11-09 08:42:25,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:42:25,578 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2021-11-09 08:42:25,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:42:25,578 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2021-11-09 08:42:25,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-09 08:42:25,579 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:42:25,579 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:42:25,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-09 08:42:25,579 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-09 08:42:25,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:42:25,580 INFO L85 PathProgramCache]: Analyzing trace with hash -648614522, now seen corresponding path program 1 times [2021-11-09 08:42:25,580 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:42:25,581 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312208675] [2021-11-09 08:42:25,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:42:25,581 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:42:25,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:42:25,779 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:42:25,779 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:42:25,779 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312208675] [2021-11-09 08:42:25,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312208675] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:42:25,780 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864587062] [2021-11-09 08:42:25,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:42:25,781 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:42:25,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e879c0e6-a86a-4b59-b907-11787051e93f/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:42:25,785 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e879c0e6-a86a-4b59-b907-11787051e93f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:42:25,790 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e879c0e6-a86a-4b59-b907-11787051e93f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-09 08:42:25,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:42:25,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-09 08:42:25,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:42:26,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-11-09 08:42:26,076 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 [2021-11-09 08:42:26,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:26,313 INFO L354 Elim1Store]: treesize reduction 50, result has 25.4 percent of original size [2021-11-09 08:42:26,328 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 2 case distinctions, treesize of input 97 treesize of output 76 [2021-11-09 08:42:26,377 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-09 08:42:26,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 66 treesize of output 70 [2021-11-09 08:42:26,407 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-11-09 08:42:26,408 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 64 treesize of output 63 [2021-11-09 08:42:26,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:26,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:42:27,156 INFO L354 Elim1Store]: treesize reduction 888, result has 11.9 percent of original size [2021-11-09 08:42:27,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 6 new quantified variables, introduced 17 case distinctions, treesize of input 334 treesize of output 257 [2021-11-09 08:42:27,200 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-09 08:42:27,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 279 treesize of output 273 [2021-11-09 08:42:27,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:27,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:27,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:27,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 34 [2021-11-09 08:42:27,368 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-09 08:42:27,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:27,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:27,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:27,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 41 [2021-11-09 08:42:27,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:27,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:27,950 INFO L354 Elim1Store]: treesize reduction 46, result has 24.6 percent of original size [2021-11-09 08:42:27,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 174 treesize of output 154 [2021-11-09 08:42:28,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:28,279 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-11-09 08:42:28,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 131 treesize of output 107 [2021-11-09 08:42:29,994 INFO L354 Elim1Store]: treesize reduction 102, result has 31.5 percent of original size [2021-11-09 08:42:29,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 94 treesize of output 92 [2021-11-09 08:42:30,310 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:42:30,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [864587062] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:42:30,311 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:42:30,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-11-09 08:42:30,311 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849869122] [2021-11-09 08:42:30,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-09 08:42:30,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:42:30,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-09 08:42:30,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-09 08:42:30,313 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:42:30,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:42:30,869 INFO L93 Difference]: Finished difference Result 60 states and 65 transitions. [2021-11-09 08:42:30,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 08:42:30,870 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 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 16 [2021-11-09 08:42:30,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:42:30,871 INFO L225 Difference]: With dead ends: 60 [2021-11-09 08:42:30,871 INFO L226 Difference]: Without dead ends: 58 [2021-11-09 08:42:30,871 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-11-09 08:42:30,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-11-09 08:42:30,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 50. [2021-11-09 08:42:30,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 47 states have (on average 1.1702127659574468) internal successors, (55), 49 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:42:30,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 55 transitions. [2021-11-09 08:42:30,880 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 55 transitions. Word has length 16 [2021-11-09 08:42:30,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:42:30,880 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 55 transitions. [2021-11-09 08:42:30,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:42:30,881 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 55 transitions. [2021-11-09 08:42:30,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-09 08:42:30,883 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:42:30,883 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:42:30,939 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e879c0e6-a86a-4b59-b907-11787051e93f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-09 08:42:31,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e879c0e6-a86a-4b59-b907-11787051e93f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:42:31,120 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-09 08:42:31,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:42:31,121 INFO L85 PathProgramCache]: Analyzing trace with hash 1909855756, now seen corresponding path program 1 times [2021-11-09 08:42:31,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:42:31,121 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169423699] [2021-11-09 08:42:31,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:42:31,122 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:42:31,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:42:31,236 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:42:31,236 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:42:31,239 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169423699] [2021-11-09 08:42:31,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169423699] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:42:31,239 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:42:31,239 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-09 08:42:31,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820376870] [2021-11-09 08:42:31,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-09 08:42:31,240 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:42:31,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-09 08:42:31,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-09 08:42:31,242 INFO L87 Difference]: Start difference. First operand 50 states and 55 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:42:31,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:42:31,404 INFO L93 Difference]: Finished difference Result 76 states and 82 transitions. [2021-11-09 08:42:31,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-09 08:42:31,406 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 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 18 [2021-11-09 08:42:31,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:42:31,406 INFO L225 Difference]: With dead ends: 76 [2021-11-09 08:42:31,407 INFO L226 Difference]: Without dead ends: 50 [2021-11-09 08:42:31,407 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-09 08:42:31,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-11-09 08:42:31,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2021-11-09 08:42:31,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 47 states have (on average 1.148936170212766) internal successors, (54), 49 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:42:31,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2021-11-09 08:42:31,417 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 18 [2021-11-09 08:42:31,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:42:31,417 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2021-11-09 08:42:31,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:42:31,418 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2021-11-09 08:42:31,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-09 08:42:31,419 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:42:31,419 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:42:31,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-09 08:42:31,420 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-09 08:42:31,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:42:31,421 INFO L85 PathProgramCache]: Analyzing trace with hash 1000772550, now seen corresponding path program 1 times [2021-11-09 08:42:31,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:42:31,421 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614018826] [2021-11-09 08:42:31,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:42:31,422 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:42:31,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:42:31,624 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:42:31,624 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:42:31,625 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614018826] [2021-11-09 08:42:31,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614018826] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:42:31,625 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813904362] [2021-11-09 08:42:31,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:42:31,626 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:42:31,626 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e879c0e6-a86a-4b59-b907-11787051e93f/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:42:31,627 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e879c0e6-a86a-4b59-b907-11787051e93f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:42:31,633 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e879c0e6-a86a-4b59-b907-11787051e93f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-09 08:42:31,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:42:31,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-09 08:42:31,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:42:31,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-11-09 08:42:31,806 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 [2021-11-09 08:42:31,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:31,909 INFO L354 Elim1Store]: treesize reduction 50, result has 25.4 percent of original size [2021-11-09 08:42:31,910 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 2 case distinctions, treesize of input 97 treesize of output 76 [2021-11-09 08:42:31,925 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-11-09 08:42:31,926 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 66 treesize of output 65 [2021-11-09 08:42:31,945 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-09 08:42:31,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 62 treesize of output 66 [2021-11-09 08:42:32,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:32,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:42:32,471 INFO L354 Elim1Store]: treesize reduction 888, result has 11.9 percent of original size [2021-11-09 08:42:32,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 6 new quantified variables, introduced 17 case distinctions, treesize of input 334 treesize of output 257 [2021-11-09 08:42:32,499 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-09 08:42:32,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 261 treesize of output 255 [2021-11-09 08:42:32,550 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-09 08:42:32,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:32,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:32,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:32,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 21 [2021-11-09 08:42:32,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:32,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:32,701 INFO L354 Elim1Store]: treesize reduction 30, result has 33.3 percent of original size [2021-11-09 08:42:32,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 56 treesize of output 44 [2021-11-09 08:42:32,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:32,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:32,799 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 08:42:32,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 56 treesize of output 50 [2021-11-09 08:42:33,069 INFO L354 Elim1Store]: treesize reduction 33, result has 10.8 percent of original size [2021-11-09 08:42:33,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 25 [2021-11-09 08:42:33,100 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:42:33,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813904362] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:42:33,101 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:42:33,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-11-09 08:42:33,102 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460529209] [2021-11-09 08:42:33,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-09 08:42:33,102 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:42:33,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-09 08:42:33,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-11-09 08:42:33,104 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:42:33,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:42:33,546 INFO L93 Difference]: Finished difference Result 68 states and 72 transitions. [2021-11-09 08:42:33,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 08:42:33,546 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-09 08:42:33,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:42:33,547 INFO L225 Difference]: With dead ends: 68 [2021-11-09 08:42:33,547 INFO L226 Difference]: Without dead ends: 52 [2021-11-09 08:42:33,547 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-11-09 08:42:33,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-11-09 08:42:33,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 50. [2021-11-09 08:42:33,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 47 states have (on average 1.127659574468085) internal successors, (53), 49 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:42:33,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 53 transitions. [2021-11-09 08:42:33,554 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 53 transitions. Word has length 20 [2021-11-09 08:42:33,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:42:33,555 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 53 transitions. [2021-11-09 08:42:33,555 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:42:33,555 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 53 transitions. [2021-11-09 08:42:33,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-09 08:42:33,556 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:42:33,556 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:42:33,582 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e879c0e6-a86a-4b59-b907-11787051e93f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-09 08:42:33,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e879c0e6-a86a-4b59-b907-11787051e93f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:42:33,776 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-09 08:42:33,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:42:33,777 INFO L85 PathProgramCache]: Analyzing trace with hash 1552465966, now seen corresponding path program 1 times [2021-11-09 08:42:33,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:42:33,777 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976625085] [2021-11-09 08:42:33,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:42:33,777 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:42:33,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:42:33,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:42:33,818 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:42:33,818 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976625085] [2021-11-09 08:42:33,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976625085] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:42:33,818 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:42:33,818 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-09 08:42:33,819 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472226207] [2021-11-09 08:42:33,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 08:42:33,819 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:42:33,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 08:42:33,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-09 08:42:33,820 INFO L87 Difference]: Start difference. First operand 50 states and 53 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:42:33,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:42:33,904 INFO L93 Difference]: Finished difference Result 50 states and 53 transitions. [2021-11-09 08:42:33,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-09 08:42:33,904 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 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 22 [2021-11-09 08:42:33,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:42:33,905 INFO L225 Difference]: With dead ends: 50 [2021-11-09 08:42:33,905 INFO L226 Difference]: Without dead ends: 31 [2021-11-09 08:42:33,906 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-09 08:42:33,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-11-09 08:42:33,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-11-09 08:42:33,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 29 states have (on average 1.103448275862069) internal successors, (32), 30 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:42:33,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2021-11-09 08:42:33,910 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 22 [2021-11-09 08:42:33,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:42:33,910 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2021-11-09 08:42:33,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:42:33,911 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2021-11-09 08:42:33,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-09 08:42:33,911 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:42:33,912 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:42:33,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-09 08:42:33,912 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-09 08:42:33,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:42:33,912 INFO L85 PathProgramCache]: Analyzing trace with hash 1970202869, now seen corresponding path program 1 times [2021-11-09 08:42:33,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:42:33,913 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378636699] [2021-11-09 08:42:33,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:42:33,913 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:42:33,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:42:34,198 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:42:34,198 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:42:34,198 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378636699] [2021-11-09 08:42:34,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378636699] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:42:34,199 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552190777] [2021-11-09 08:42:34,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:42:34,199 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:42:34,199 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e879c0e6-a86a-4b59-b907-11787051e93f/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:42:34,204 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e879c0e6-a86a-4b59-b907-11787051e93f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:42:34,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e879c0e6-a86a-4b59-b907-11787051e93f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-09 08:42:34,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:42:34,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-09 08:42:34,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:42:34,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-11-09 08:42:34,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:34,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:42:34,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:34,478 INFO L354 Elim1Store]: treesize reduction 68, result has 18.1 percent of original size [2021-11-09 08:42:34,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 185 treesize of output 132 [2021-11-09 08:42:34,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:34,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:34,503 INFO L354 Elim1Store]: treesize reduction 68, result has 18.1 percent of original size [2021-11-09 08:42:34,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 104 treesize of output 51 [2021-11-09 08:42:34,522 INFO L354 Elim1Store]: treesize reduction 26, result has 35.0 percent of original size [2021-11-09 08:42:34,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 64 treesize of output 68 [2021-11-09 08:42:34,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:34,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:34,844 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 08:42:34,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 1031 treesize of output 624 [2021-11-09 08:42:34,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:42:35,012 INFO L354 Elim1Store]: treesize reduction 268, result has 9.8 percent of original size [2021-11-09 08:42:35,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 494 treesize of output 325 [2021-11-09 08:42:35,111 INFO L354 Elim1Store]: treesize reduction 524, result has 6.8 percent of original size [2021-11-09 08:42:35,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 451 treesize of output 435 [2021-11-09 08:42:35,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:35,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:42:35,151 INFO L354 Elim1Store]: treesize reduction 124, result has 19.5 percent of original size [2021-11-09 08:42:35,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 190 treesize of output 153 [2021-11-09 08:42:35,165 INFO L354 Elim1Store]: treesize reduction 37, result has 24.5 percent of original size [2021-11-09 08:42:35,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 136 treesize of output 130 [2021-11-09 08:42:35,663 INFO L354 Elim1Store]: treesize reduction 41, result has 8.9 percent of original size [2021-11-09 08:42:35,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 133 treesize of output 79 [2021-11-09 08:42:35,675 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-11-09 08:42:35,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 73 treesize of output 44 [2021-11-09 08:42:35,716 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-09 08:42:35,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 14 [2021-11-09 08:42:35,725 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:42:35,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552190777] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:42:35,725 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:42:35,725 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 12 [2021-11-09 08:42:35,726 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318300073] [2021-11-09 08:42:35,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-09 08:42:35,726 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:42:35,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-09 08:42:35,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-09 08:42:35,727 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:42:36,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:42:36,062 INFO L93 Difference]: Finished difference Result 66 states and 69 transitions. [2021-11-09 08:42:36,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-09 08:42:36,062 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-11-09 08:42:36,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:42:36,063 INFO L225 Difference]: With dead ends: 66 [2021-11-09 08:42:36,063 INFO L226 Difference]: Without dead ends: 50 [2021-11-09 08:42:36,064 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-11-09 08:42:36,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-11-09 08:42:36,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 46. [2021-11-09 08:42:36,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 44 states have (on average 1.0909090909090908) internal successors, (48), 45 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:42:36,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2021-11-09 08:42:36,070 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 22 [2021-11-09 08:42:36,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:42:36,071 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2021-11-09 08:42:36,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:42:36,071 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2021-11-09 08:42:36,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-09 08:42:36,072 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:42:36,072 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:42:36,107 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e879c0e6-a86a-4b59-b907-11787051e93f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-09 08:42:36,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e879c0e6-a86a-4b59-b907-11787051e93f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-09 08:42:36,296 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-09 08:42:36,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:42:36,297 INFO L85 PathProgramCache]: Analyzing trace with hash -882557003, now seen corresponding path program 1 times [2021-11-09 08:42:36,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:42:36,297 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318176910] [2021-11-09 08:42:36,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:42:36,297 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:42:36,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:42:36,561 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:42:36,562 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:42:36,562 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318176910] [2021-11-09 08:42:36,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318176910] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:42:36,562 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144069830] [2021-11-09 08:42:36,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:42:36,563 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:42:36,563 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e879c0e6-a86a-4b59-b907-11787051e93f/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:42:36,568 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e879c0e6-a86a-4b59-b907-11787051e93f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:42:36,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e879c0e6-a86a-4b59-b907-11787051e93f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-09 08:42:36,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:42:36,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-09 08:42:36,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:42:36,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-11-09 08:42:36,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:36,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:36,878 INFO L354 Elim1Store]: treesize reduction 68, result has 18.1 percent of original size [2021-11-09 08:42:36,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 185 treesize of output 132 [2021-11-09 08:42:36,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:36,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:42:36,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:36,903 INFO L354 Elim1Store]: treesize reduction 60, result has 20.0 percent of original size [2021-11-09 08:42:36,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 72 treesize of output 48 [2021-11-09 08:42:36,921 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-09 08:42:36,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 48 treesize of output 52 [2021-11-09 08:42:37,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:37,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:37,202 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 08:42:37,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 986 treesize of output 591 [2021-11-09 08:42:37,210 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:42:37,329 INFO L354 Elim1Store]: treesize reduction 268, result has 9.8 percent of original size [2021-11-09 08:42:37,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 449 treesize of output 292 [2021-11-09 08:42:37,336 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 410 treesize of output 398 [2021-11-09 08:42:37,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:37,348 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:42:37,376 INFO L354 Elim1Store]: treesize reduction 124, result has 19.5 percent of original size [2021-11-09 08:42:37,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 179 treesize of output 142 [2021-11-09 08:42:37,391 INFO L354 Elim1Store]: treesize reduction 37, result has 24.5 percent of original size [2021-11-09 08:42:37,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 125 treesize of output 119 [2021-11-09 08:42:38,518 INFO L354 Elim1Store]: treesize reduction 89, result has 11.9 percent of original size [2021-11-09 08:42:38,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 138 treesize of output 83 [2021-11-09 08:42:38,539 INFO L354 Elim1Store]: treesize reduction 82, result has 3.5 percent of original size [2021-11-09 08:42:38,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 74 treesize of output 47 [2021-11-09 08:42:38,570 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 15 treesize of output 7 [2021-11-09 08:42:38,576 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:42:38,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144069830] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:42:38,576 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:42:38,576 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-11-09 08:42:38,577 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780643418] [2021-11-09 08:42:38,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-09 08:42:38,577 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:42:38,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-09 08:42:38,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-11-09 08:42:38,578 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:42:39,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:42:39,007 INFO L93 Difference]: Finished difference Result 54 states and 55 transitions. [2021-11-09 08:42:39,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-09 08:42:39,008 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-11-09 08:42:39,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:42:39,008 INFO L225 Difference]: With dead ends: 54 [2021-11-09 08:42:39,008 INFO L226 Difference]: Without dead ends: 35 [2021-11-09 08:42:39,009 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-11-09 08:42:39,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-11-09 08:42:39,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-11-09 08:42:39,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 34 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:42:39,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2021-11-09 08:42:39,014 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 26 [2021-11-09 08:42:39,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:42:39,014 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2021-11-09 08:42:39,014 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:42:39,014 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2021-11-09 08:42:39,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-09 08:42:39,015 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:42:39,015 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:42:39,056 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e879c0e6-a86a-4b59-b907-11787051e93f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-09 08:42:39,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e879c0e6-a86a-4b59-b907-11787051e93f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:42:39,216 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-09 08:42:39,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:42:39,216 INFO L85 PathProgramCache]: Analyzing trace with hash -1994252450, now seen corresponding path program 2 times [2021-11-09 08:42:39,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:42:39,216 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150236877] [2021-11-09 08:42:39,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:42:39,217 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:42:39,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:42:39,586 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:42:39,586 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:42:39,586 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150236877] [2021-11-09 08:42:39,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150236877] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:42:39,587 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746557577] [2021-11-09 08:42:39,587 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 08:42:39,587 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:42:39,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e879c0e6-a86a-4b59-b907-11787051e93f/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:42:39,596 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e879c0e6-a86a-4b59-b907-11787051e93f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:42:39,616 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e879c0e6-a86a-4b59-b907-11787051e93f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-09 08:42:39,985 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 08:42:39,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:42:39,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 47 conjunts are in the unsatisfiable core [2021-11-09 08:42:39,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:42:40,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-11-09 08:42:40,080 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 [2021-11-09 08:42:40,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:40,090 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:42:40,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:40,126 INFO L354 Elim1Store]: treesize reduction 68, result has 18.1 percent of original size [2021-11-09 08:42:40,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 185 treesize of output 132 [2021-11-09 08:42:40,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:40,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:40,153 INFO L354 Elim1Store]: treesize reduction 68, result has 18.1 percent of original size [2021-11-09 08:42:40,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 104 treesize of output 51 [2021-11-09 08:42:40,167 INFO L354 Elim1Store]: treesize reduction 26, result has 35.0 percent of original size [2021-11-09 08:42:40,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 64 treesize of output 68 [2021-11-09 08:42:40,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:42:40,551 INFO L354 Elim1Store]: treesize reduction 178, result has 16.4 percent of original size [2021-11-09 08:42:40,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 338 treesize of output 200 [2021-11-09 08:42:40,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:42:40,649 INFO L354 Elim1Store]: treesize reduction 266, result has 16.1 percent of original size [2021-11-09 08:42:40,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 5 case distinctions, treesize of input 336 treesize of output 243 [2021-11-09 08:42:40,698 INFO L354 Elim1Store]: treesize reduction 92, result has 31.9 percent of original size [2021-11-09 08:42:40,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 237 treesize of output 260 [2021-11-09 08:42:40,717 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 251 treesize of output 227 [2021-11-09 08:42:40,723 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 224 treesize of output 188 [2021-11-09 08:42:40,736 INFO L354 Elim1Store]: treesize reduction 41, result has 21.2 percent of original size [2021-11-09 08:42:40,736 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 185 treesize of output 184 [2021-11-09 08:42:41,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:42:41,881 INFO L354 Elim1Store]: treesize reduction 138, result has 20.2 percent of original size [2021-11-09 08:42:41,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 1559 treesize of output 711 [2021-11-09 08:42:41,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:41,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:42:42,822 INFO L354 Elim1Store]: treesize reduction 1052, result has 8.1 percent of original size [2021-11-09 08:42:42,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 9 new quantified variables, introduced 18 case distinctions, treesize of input 1584 treesize of output 726 [2021-11-09 08:42:42,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:42,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:42,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:42:43,917 INFO L354 Elim1Store]: treesize reduction 2959, result has 8.7 percent of original size [2021-11-09 08:42:43,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 8 new quantified variables, introduced 31 case distinctions, treesize of input 1076 treesize of output 1041 [2021-11-09 08:42:44,011 INFO L354 Elim1Store]: treesize reduction 60, result has 17.8 percent of original size [2021-11-09 08:42:44,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 1308 treesize of output 1304 [2021-11-09 08:42:44,172 INFO L354 Elim1Store]: treesize reduction 324, result has 12.0 percent of original size [2021-11-09 08:42:44,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 5 case distinctions, treesize of input 1306 treesize of output 1254 [2021-11-09 08:42:44,296 INFO L354 Elim1Store]: treesize reduction 312, result has 25.0 percent of original size [2021-11-09 08:42:44,297 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 8 case distinctions, treesize of input 1233 treesize of output 1302 [2021-11-09 08:42:44,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 15 [2021-11-09 08:42:44,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:44,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 32 [2021-11-09 08:42:44,701 INFO L354 Elim1Store]: treesize reduction 45, result has 21.1 percent of original size [2021-11-09 08:42:44,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1008 treesize of output 982 [2021-11-09 08:42:44,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:44,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:44,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 110 treesize of output 58 [2021-11-09 08:42:44,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:44,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:44,895 INFO L354 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2021-11-09 08:42:44,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 8 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 2 case distinctions, treesize of input 114 treesize of output 74 [2021-11-09 08:42:47,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:47,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:47,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:42:47,622 INFO L354 Elim1Store]: treesize reduction 275, result has 4.8 percent of original size [2021-11-09 08:42:47,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 5 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 27 case distinctions, treesize of input 922 treesize of output 820 [2021-11-09 08:42:49,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:49,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:49,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:42:49,606 INFO L354 Elim1Store]: treesize reduction 249, result has 5.3 percent of original size [2021-11-09 08:42:49,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 3 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 20 case distinctions, treesize of input 731 treesize of output 585 [2021-11-09 08:42:49,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:49,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:42:50,034 INFO L354 Elim1Store]: treesize reduction 288, result has 5.6 percent of original size [2021-11-09 08:42:50,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 2 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 26 case distinctions, treesize of input 521 treesize of output 367 [2021-11-09 08:42:53,177 INFO L354 Elim1Store]: treesize reduction 138, result has 20.2 percent of original size [2021-11-09 08:42:53,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 3 disjoint index pairs (out of 21 index pairs), introduced 9 new quantified variables, introduced 21 case distinctions, treesize of input 326 treesize of output 226 [2021-11-09 08:42:53,234 INFO L354 Elim1Store]: treesize reduction 134, result has 10.1 percent of original size [2021-11-09 08:42:53,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 3 disjoint index pairs (out of 21 index pairs), introduced 8 new quantified variables, introduced 21 case distinctions, treesize of input 217 treesize of output 170 [2021-11-09 08:42:53,616 INFO L354 Elim1Store]: treesize reduction 33, result has 10.8 percent of original size [2021-11-09 08:42:53,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 25 [2021-11-09 08:42:53,623 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:42:53,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746557577] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:42:53,623 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:42:53,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-11-09 08:42:53,624 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615173884] [2021-11-09 08:42:53,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-09 08:42:53,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:42:53,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-09 08:42:53,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-11-09 08:42:53,625 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:42:58,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:42:58,607 INFO L93 Difference]: Finished difference Result 72 states and 77 transitions. [2021-11-09 08:42:58,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-09 08:42:58,608 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-11-09 08:42:58,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:42:58,608 INFO L225 Difference]: With dead ends: 72 [2021-11-09 08:42:58,609 INFO L226 Difference]: Without dead ends: 70 [2021-11-09 08:42:58,609 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2021-11-09 08:42:58,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-11-09 08:42:58,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 41. [2021-11-09 08:42:58,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 39 states have (on average 1.1025641025641026) internal successors, (43), 40 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:42:58,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2021-11-09 08:42:58,617 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 26 [2021-11-09 08:42:58,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:42:58,617 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2021-11-09 08:42:58,618 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:42:58,618 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2021-11-09 08:42:58,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-09 08:42:58,619 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:42:58,620 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:42:58,664 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e879c0e6-a86a-4b59-b907-11787051e93f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-09 08:42:58,838 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e879c0e6-a86a-4b59-b907-11787051e93f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:42:58,838 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-09 08:42:58,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:42:58,839 INFO L85 PathProgramCache]: Analyzing trace with hash -866838114, now seen corresponding path program 2 times [2021-11-09 08:42:58,839 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:42:58,839 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589179912] [2021-11-09 08:42:58,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:42:58,839 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:42:58,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:42:59,258 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:42:59,258 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:42:59,258 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589179912] [2021-11-09 08:42:59,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589179912] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:42:59,258 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759120510] [2021-11-09 08:42:59,259 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 08:42:59,259 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:42:59,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e879c0e6-a86a-4b59-b907-11787051e93f/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:42:59,264 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e879c0e6-a86a-4b59-b907-11787051e93f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:42:59,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e879c0e6-a86a-4b59-b907-11787051e93f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-09 08:42:59,773 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 08:42:59,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:42:59,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 55 conjunts are in the unsatisfiable core [2021-11-09 08:42:59,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:42:59,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-11-09 08:42:59,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:59,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:42:59,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:59,881 INFO L354 Elim1Store]: treesize reduction 68, result has 18.1 percent of original size [2021-11-09 08:42:59,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 185 treesize of output 132 [2021-11-09 08:42:59,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:59,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:59,903 INFO L354 Elim1Store]: treesize reduction 68, result has 18.1 percent of original size [2021-11-09 08:42:59,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 104 treesize of output 51 [2021-11-09 08:42:59,919 INFO L354 Elim1Store]: treesize reduction 26, result has 35.0 percent of original size [2021-11-09 08:42:59,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 64 treesize of output 68 [2021-11-09 08:42:59,944 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 [2021-11-09 08:43:00,159 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:43:00,263 INFO L354 Elim1Store]: treesize reduction 178, result has 16.4 percent of original size [2021-11-09 08:43:00,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 338 treesize of output 200 [2021-11-09 08:43:00,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:43:00,347 INFO L354 Elim1Store]: treesize reduction 266, result has 16.1 percent of original size [2021-11-09 08:43:00,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 5 case distinctions, treesize of input 336 treesize of output 243 [2021-11-09 08:43:00,414 INFO L354 Elim1Store]: treesize reduction 92, result has 31.9 percent of original size [2021-11-09 08:43:00,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 237 treesize of output 260 [2021-11-09 08:43:00,427 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 256 treesize of output 199 [2021-11-09 08:43:00,444 INFO L354 Elim1Store]: treesize reduction 41, result has 21.2 percent of original size [2021-11-09 08:43:00,444 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 185 treesize of output 184 [2021-11-09 08:43:01,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:43:01,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:43:01,412 INFO L354 Elim1Store]: treesize reduction 138, result has 20.2 percent of original size [2021-11-09 08:43:01,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 1559 treesize of output 711 [2021-11-09 08:43:01,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:43:01,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:43:02,504 INFO L354 Elim1Store]: treesize reduction 1052, result has 8.1 percent of original size [2021-11-09 08:43:02,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 9 new quantified variables, introduced 18 case distinctions, treesize of input 1584 treesize of output 726 [2021-11-09 08:43:02,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:43:02,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:43:02,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:43:03,681 INFO L354 Elim1Store]: treesize reduction 3959, result has 7.8 percent of original size [2021-11-09 08:43:03,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 8 new quantified variables, introduced 31 case distinctions, treesize of input 1500 treesize of output 1377 [2021-11-09 08:43:03,864 INFO L354 Elim1Store]: treesize reduction 206, result has 12.3 percent of original size [2021-11-09 08:43:03,866 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 4 case distinctions, treesize of input 1427 treesize of output 1389 [2021-11-09 08:43:03,965 INFO L354 Elim1Store]: treesize reduction 97, result has 14.9 percent of original size [2021-11-09 08:43:03,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 1383 treesize of output 1362 [2021-11-09 08:43:04,065 INFO L354 Elim1Store]: treesize reduction 72, result has 25.8 percent of original size [2021-11-09 08:43:04,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 1356 treesize of output 1356 [2021-11-09 08:43:04,210 INFO L354 Elim1Store]: treesize reduction 348, result has 22.3 percent of original size [2021-11-09 08:43:04,210 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 8 case distinctions, treesize of input 1344 treesize of output 1393 [2021-11-09 08:43:04,532 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 08:43:04,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 46 [2021-11-09 08:43:04,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 29 [2021-11-09 08:43:04,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:43:04,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 27 [2021-11-09 08:43:04,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:43:04,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:43:04,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:43:04,755 INFO L354 Elim1Store]: treesize reduction 27, result has 27.0 percent of original size [2021-11-09 08:43:04,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 9 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 4 case distinctions, treesize of input 233 treesize of output 165 [2021-11-09 08:43:04,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:43:04,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:43:04,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:43:04,948 INFO L354 Elim1Store]: treesize reduction 9, result has 52.6 percent of original size [2021-11-09 08:43:04,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 8 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 2 case distinctions, treesize of input 209 treesize of output 137 [2021-11-09 08:43:05,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:43:05,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:43:05,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:43:05,042 INFO L354 Elim1Store]: treesize reduction 19, result has 34.5 percent of original size [2021-11-09 08:43:05,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 8 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 3 case distinctions, treesize of input 178 treesize of output 104 [2021-11-09 08:43:05,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:43:05,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:43:05,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:43:05,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:43:05,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:43:05,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:43:05,141 INFO L354 Elim1Store]: treesize reduction 10, result has 73.0 percent of original size [2021-11-09 08:43:05,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 11 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 4 case distinctions, treesize of input 208 treesize of output 176 [2021-11-09 08:43:10,488 INFO L354 Elim1Store]: treesize reduction 116, result has 10.1 percent of original size [2021-11-09 08:43:10,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 15 case distinctions, treesize of input 250 treesize of output 148 [2021-11-09 08:43:10,518 INFO L354 Elim1Store]: treesize reduction 128, result has 0.8 percent of original size [2021-11-09 08:43:10,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 15 case distinctions, treesize of input 160 treesize of output 102 [2021-11-09 08:43:10,820 INFO L354 Elim1Store]: treesize reduction 72, result has 11.1 percent of original size [2021-11-09 08:43:10,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 62 treesize of output 46 [2021-11-09 08:43:10,869 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:43:10,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759120510] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:43:10,870 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:43:10,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-11-09 08:43:10,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479775321] [2021-11-09 08:43:10,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-09 08:43:10,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:43:10,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-09 08:43:10,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2021-11-09 08:43:10,873 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:43:16,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:43:16,407 INFO L93 Difference]: Finished difference Result 75 states and 79 transitions. [2021-11-09 08:43:16,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-09 08:43:16,408 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-11-09 08:43:16,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:43:16,409 INFO L225 Difference]: With dead ends: 75 [2021-11-09 08:43:16,409 INFO L226 Difference]: Without dead ends: 67 [2021-11-09 08:43:16,410 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=202, Invalid=920, Unknown=0, NotChecked=0, Total=1122 [2021-11-09 08:43:16,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-11-09 08:43:16,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 41. [2021-11-09 08:43:16,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 39 states have (on average 1.0769230769230769) internal successors, (42), 40 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:43:16,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2021-11-09 08:43:16,418 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 30 [2021-11-09 08:43:16,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:43:16,419 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2021-11-09 08:43:16,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:43:16,419 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2021-11-09 08:43:16,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-09 08:43:16,421 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:43:16,421 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:43:16,468 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e879c0e6-a86a-4b59-b907-11787051e93f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-09 08:43:16,634 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e879c0e6-a86a-4b59-b907-11787051e93f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-09 08:43:16,634 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-09 08:43:16,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:43:16,635 INFO L85 PathProgramCache]: Analyzing trace with hash -1802282803, now seen corresponding path program 3 times [2021-11-09 08:43:16,635 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:43:16,635 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096790512] [2021-11-09 08:43:16,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:43:16,636 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:43:16,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:43:17,086 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:43:17,086 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:43:17,087 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096790512] [2021-11-09 08:43:17,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096790512] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:43:17,087 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507793216] [2021-11-09 08:43:17,087 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 08:43:17,087 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:43:17,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e879c0e6-a86a-4b59-b907-11787051e93f/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:43:17,088 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e879c0e6-a86a-4b59-b907-11787051e93f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:43:17,089 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e879c0e6-a86a-4b59-b907-11787051e93f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-09 08:43:17,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-09 08:43:17,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:43:17,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 62 conjunts are in the unsatisfiable core [2021-11-09 08:43:17,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:43:17,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-11-09 08:43:17,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:43:17,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:43:17,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:43:18,004 INFO L354 Elim1Store]: treesize reduction 68, result has 18.1 percent of original size [2021-11-09 08:43:18,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 185 treesize of output 132 [2021-11-09 08:43:18,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:43:18,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:43:18,029 INFO L354 Elim1Store]: treesize reduction 68, result has 18.1 percent of original size [2021-11-09 08:43:18,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 104 treesize of output 51 [2021-11-09 08:43:18,044 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-09 08:43:18,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 48 treesize of output 52 [2021-11-09 08:43:18,273 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:43:18,354 INFO L354 Elim1Store]: treesize reduction 184, result has 13.6 percent of original size [2021-11-09 08:43:18,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 323 treesize of output 175 [2021-11-09 08:43:18,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:43:18,429 INFO L354 Elim1Store]: treesize reduction 224, result has 14.2 percent of original size [2021-11-09 08:43:18,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 5 case distinctions, treesize of input 142 treesize of output 112 [2021-11-09 08:43:18,462 INFO L354 Elim1Store]: treesize reduction 68, result has 21.8 percent of original size [2021-11-09 08:43:18,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 106 treesize of output 113 [2021-11-09 08:43:19,289 INFO L354 Elim1Store]: treesize reduction 1219, result has 3.9 percent of original size [2021-11-09 08:43:19,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 13 case distinctions, treesize of input 419 treesize of output 322 [2021-11-09 08:43:19,336 INFO L354 Elim1Store]: treesize reduction 105, result has 6.3 percent of original size [2021-11-09 08:43:19,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 453 treesize of output 409 [2021-11-09 08:43:19,409 INFO L354 Elim1Store]: treesize reduction 259, result has 13.7 percent of original size [2021-11-09 08:43:19,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 241 treesize of output 221 [2021-11-09 08:43:19,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 209 treesize of output 190 [2021-11-09 08:43:19,417 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 190 treesize of output 178 [2021-11-09 08:43:19,431 INFO L354 Elim1Store]: treesize reduction 69, result has 5.5 percent of original size [2021-11-09 08:43:19,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 175 treesize of output 163 [2021-11-09 08:43:19,444 INFO L354 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2021-11-09 08:43:19,444 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 151 treesize of output 150 [2021-11-09 08:43:21,889 INFO L354 Elim1Store]: treesize reduction 173, result has 4.4 percent of original size [2021-11-09 08:43:21,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 9 new quantified variables, introduced 21 case distinctions, treesize of input 191 treesize of output 124 [2021-11-09 08:43:21,923 INFO L354 Elim1Store]: treesize reduction 154, result has 1.9 percent of original size [2021-11-09 08:43:21,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 9 new quantified variables, introduced 21 case distinctions, treesize of input 117 treesize of output 70 [2021-11-09 08:43:22,168 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:43:22,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507793216] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:43:22,169 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:43:22,169 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 23 [2021-11-09 08:43:22,170 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404629795] [2021-11-09 08:43:22,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-09 08:43:22,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:43:22,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-09 08:43:22,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-11-09 08:43:22,172 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 23 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:43:27,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:43:27,580 INFO L93 Difference]: Finished difference Result 82 states and 85 transitions. [2021-11-09 08:43:27,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-09 08:43:27,581 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 23 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 32 [2021-11-09 08:43:27,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:43:27,582 INFO L225 Difference]: With dead ends: 82 [2021-11-09 08:43:27,582 INFO L226 Difference]: Without dead ends: 66 [2021-11-09 08:43:27,583 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=127, Invalid=629, Unknown=0, NotChecked=0, Total=756 [2021-11-09 08:43:27,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-11-09 08:43:27,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 62. [2021-11-09 08:43:27,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 60 states have (on average 1.0666666666666667) internal successors, (64), 61 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:43:27,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 64 transitions. [2021-11-09 08:43:27,595 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 64 transitions. Word has length 32 [2021-11-09 08:43:27,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:43:27,596 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 64 transitions. [2021-11-09 08:43:27,596 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 23 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:43:27,596 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 64 transitions. [2021-11-09 08:43:27,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-09 08:43:27,597 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:43:27,598 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:43:27,641 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e879c0e6-a86a-4b59-b907-11787051e93f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-09 08:43:27,798 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e879c0e6-a86a-4b59-b907-11787051e93f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-09 08:43:27,798 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-09 08:43:27,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:43:27,799 INFO L85 PathProgramCache]: Analyzing trace with hash -526515315, now seen corresponding path program 3 times [2021-11-09 08:43:27,799 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:43:27,799 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981413969] [2021-11-09 08:43:27,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:43:27,799 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:43:27,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:43:28,206 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:43:28,206 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:43:28,206 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981413969] [2021-11-09 08:43:28,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981413969] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:43:28,206 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409160837] [2021-11-09 08:43:28,207 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 08:43:28,207 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:43:28,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e879c0e6-a86a-4b59-b907-11787051e93f/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:43:28,208 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e879c0e6-a86a-4b59-b907-11787051e93f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:43:28,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e879c0e6-a86a-4b59-b907-11787051e93f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-09 08:43:29,164 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-09 08:43:29,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:43:29,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 51 conjunts are in the unsatisfiable core [2021-11-09 08:43:29,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:43:29,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-11-09 08:43:29,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:43:29,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:43:29,281 INFO L354 Elim1Store]: treesize reduction 68, result has 18.1 percent of original size [2021-11-09 08:43:29,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 185 treesize of output 132 [2021-11-09 08:43:29,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:43:29,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:43:29,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:43:29,306 INFO L354 Elim1Store]: treesize reduction 60, result has 20.0 percent of original size [2021-11-09 08:43:29,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 72 treesize of output 48 [2021-11-09 08:43:29,322 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-09 08:43:29,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 48 treesize of output 52 [2021-11-09 08:43:29,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:43:29,623 INFO L354 Elim1Store]: treesize reduction 184, result has 13.6 percent of original size [2021-11-09 08:43:29,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 323 treesize of output 175 [2021-11-09 08:43:29,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:43:29,670 INFO L354 Elim1Store]: treesize reduction 224, result has 14.2 percent of original size [2021-11-09 08:43:29,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 5 case distinctions, treesize of input 142 treesize of output 112 [2021-11-09 08:43:29,695 INFO L354 Elim1Store]: treesize reduction 68, result has 21.8 percent of original size [2021-11-09 08:43:29,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 106 treesize of output 113 [2021-11-09 08:43:30,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:43:30,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:43:30,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:43:30,085 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-09 08:43:30,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 1436 treesize of output 630 [2021-11-09 08:43:30,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:43:30,287 INFO L354 Elim1Store]: treesize reduction 444, result has 8.8 percent of original size [2021-11-09 08:43:30,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 12 case distinctions, treesize of input 659 treesize of output 331 [2021-11-09 08:43:30,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:43:30,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:43:30,355 INFO L354 Elim1Store]: treesize reduction 208, result has 22.4 percent of original size [2021-11-09 08:43:30,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 11 case distinctions, treesize of input 216 treesize of output 201 [2021-11-09 08:43:30,378 INFO L354 Elim1Store]: treesize reduction 81, result has 4.7 percent of original size [2021-11-09 08:43:30,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 178 treesize of output 162 [2021-11-09 08:43:30,388 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 150 treesize of output 146 [2021-11-09 08:43:36,349 INFO L354 Elim1Store]: treesize reduction 226, result has 9.2 percent of original size [2021-11-09 08:43:36,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 16 new quantified variables, introduced 28 case distinctions, treesize of input 472 treesize of output 170 [2021-11-09 08:43:36,410 INFO L354 Elim1Store]: treesize reduction 226, result has 3.0 percent of original size [2021-11-09 08:43:36,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 11 new quantified variables, introduced 28 case distinctions, treesize of input 104 treesize of output 71 [2021-11-09 08:43:36,435 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 15 treesize of output 7 [2021-11-09 08:43:36,441 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:43:36,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1409160837] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:43:36,441 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:43:36,441 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-11-09 08:43:36,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983118052] [2021-11-09 08:43:36,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-09 08:43:36,442 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:43:36,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-09 08:43:36,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=229, Unknown=2, NotChecked=0, Total=272 [2021-11-09 08:43:36,443 INFO L87 Difference]: Start difference. First operand 62 states and 64 transitions. Second operand has 17 states, 17 states have (on average 3.8823529411764706) internal successors, (66), 17 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:43:45,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:43:45,351 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2021-11-09 08:43:45,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-09 08:43:45,352 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.8823529411764706) internal successors, (66), 17 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-11-09 08:43:45,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:43:45,353 INFO L225 Difference]: With dead ends: 70 [2021-11-09 08:43:45,353 INFO L226 Difference]: Without dead ends: 45 [2021-11-09 08:43:45,354 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=53, Invalid=287, Unknown=2, NotChecked=0, Total=342 [2021-11-09 08:43:45,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-11-09 08:43:45,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-11-09 08:43:45,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 43 states have (on average 1.069767441860465) internal successors, (46), 44 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:43:45,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2021-11-09 08:43:45,359 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 36 [2021-11-09 08:43:45,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:43:45,359 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2021-11-09 08:43:45,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.8823529411764706) internal successors, (66), 17 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:43:45,359 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2021-11-09 08:43:45,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-09 08:43:45,360 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:43:45,360 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:43:45,391 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e879c0e6-a86a-4b59-b907-11787051e93f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-09 08:43:45,568 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e879c0e6-a86a-4b59-b907-11787051e93f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-09 08:43:45,568 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-09 08:43:45,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:43:45,569 INFO L85 PathProgramCache]: Analyzing trace with hash 872964086, now seen corresponding path program 4 times [2021-11-09 08:43:45,569 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:43:45,569 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200155955] [2021-11-09 08:43:45,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:43:45,569 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:43:45,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:43:46,154 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:43:46,154 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:43:46,154 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200155955] [2021-11-09 08:43:46,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200155955] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:43:46,154 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115863545] [2021-11-09 08:43:46,155 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 08:43:46,155 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:43:46,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e879c0e6-a86a-4b59-b907-11787051e93f/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:43:46,156 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e879c0e6-a86a-4b59-b907-11787051e93f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:43:46,176 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e879c0e6-a86a-4b59-b907-11787051e93f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-09 08:43:47,111 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 08:43:47,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:43:47,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 71 conjunts are in the unsatisfiable core [2021-11-09 08:43:47,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:43:47,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-11-09 08:43:47,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:43:47,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:43:47,254 INFO L354 Elim1Store]: treesize reduction 68, result has 18.1 percent of original size [2021-11-09 08:43:47,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 185 treesize of output 132 [2021-11-09 08:43:47,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:43:47,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:43:47,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:43:47,284 INFO L354 Elim1Store]: treesize reduction 80, result has 19.2 percent of original size [2021-11-09 08:43:47,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 129 treesize of output 64 [2021-11-09 08:43:47,304 INFO L354 Elim1Store]: treesize reduction 26, result has 35.0 percent of original size [2021-11-09 08:43:47,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 64 treesize of output 68 [2021-11-09 08:43:47,527 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 [2021-11-09 08:43:47,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:43:47,609 INFO L354 Elim1Store]: treesize reduction 184, result has 13.6 percent of original size [2021-11-09 08:43:47,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 323 treesize of output 175 [2021-11-09 08:43:47,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:43:47,672 INFO L354 Elim1Store]: treesize reduction 272, result has 14.2 percent of original size [2021-11-09 08:43:47,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 5 case distinctions, treesize of input 243 treesize of output 144 [2021-11-09 08:43:47,700 INFO L354 Elim1Store]: treesize reduction 108, result has 20.0 percent of original size [2021-11-09 08:43:47,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 138 treesize of output 145 [2021-11-09 08:43:48,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:43:48,252 INFO L354 Elim1Store]: treesize reduction 316, result has 12.0 percent of original size [2021-11-09 08:43:48,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 559 treesize of output 264 [2021-11-09 08:43:48,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:43:48,367 INFO L354 Elim1Store]: treesize reduction 584, result has 11.9 percent of original size [2021-11-09 08:43:48,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 12 case distinctions, treesize of input 491 treesize of output 358 [2021-11-09 08:43:48,378 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 355 treesize of output 274 [2021-11-09 08:43:48,421 INFO L354 Elim1Store]: treesize reduction 254, result has 14.8 percent of original size [2021-11-09 08:43:48,421 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 9 case distinctions, treesize of input 256 treesize of output 266 [2021-11-09 08:43:48,435 INFO L354 Elim1Store]: treesize reduction 53, result has 22.1 percent of original size [2021-11-09 08:43:48,436 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 254 treesize of output 253 [2021-11-09 08:43:49,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:43:49,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:43:49,133 INFO L354 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2021-11-09 08:43:49,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 9 new quantified variables, introduced 15 case distinctions, treesize of input 2021 treesize of output 720 [2021-11-09 08:43:49,154 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:43:49,547 INFO L354 Elim1Store]: treesize reduction 636, result has 8.2 percent of original size [2021-11-09 08:43:49,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 23 case distinctions, treesize of input 1004 treesize of output 421 [2021-11-09 08:43:49,734 INFO L354 Elim1Store]: treesize reduction 988, result has 5.5 percent of original size [2021-11-09 08:43:49,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 684 treesize of output 651 [2021-11-09 08:43:49,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:43:49,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:43:49,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:43:49,765 INFO L354 Elim1Store]: treesize reduction 112, result has 0.9 percent of original size [2021-11-09 08:43:49,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 619 treesize of output 598 [2021-11-09 08:43:49,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:43:49,841 INFO L354 Elim1Store]: treesize reduction 376, result has 16.6 percent of original size [2021-11-09 08:43:49,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 346 treesize of output 312 [2021-11-09 08:43:49,861 INFO L354 Elim1Store]: treesize reduction 169, result has 4.5 percent of original size [2021-11-09 08:43:49,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 294 treesize of output 268 [2021-11-09 08:44:01,606 INFO L354 Elim1Store]: treesize reduction 253, result has 8.7 percent of original size [2021-11-09 08:44:01,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 1 disjoint index pairs (out of 36 index pairs), introduced 12 new quantified variables, introduced 36 case distinctions, treesize of input 266 treesize of output 154 [2021-11-09 08:44:01,669 INFO L354 Elim1Store]: treesize reduction 242, result has 1.2 percent of original size [2021-11-09 08:44:01,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 1 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 36 case distinctions, treesize of input 137 treesize of output 90 [2021-11-09 08:44:01,909 INFO L354 Elim1Store]: treesize reduction 46, result has 31.3 percent of original size [2021-11-09 08:44:01,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 46 [2021-11-09 08:44:01,917 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:44:01,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115863545] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:44:01,918 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:44:01,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 22 [2021-11-09 08:44:01,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344959047] [2021-11-09 08:44:01,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-09 08:44:01,919 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:44:01,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-09 08:44:01,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=385, Unknown=3, NotChecked=0, Total=462 [2021-11-09 08:44:01,920 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 22 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:44:11,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:44:11,752 INFO L93 Difference]: Finished difference Result 88 states and 93 transitions. [2021-11-09 08:44:11,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-09 08:44:11,753 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 22 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-11-09 08:44:11,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:44:11,754 INFO L225 Difference]: With dead ends: 88 [2021-11-09 08:44:11,754 INFO L226 Difference]: Without dead ends: 86 [2021-11-09 08:44:11,755 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=148, Invalid=841, Unknown=3, NotChecked=0, Total=992 [2021-11-09 08:44:11,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-11-09 08:44:11,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 51. [2021-11-09 08:44:11,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 50 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:44:11,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2021-11-09 08:44:11,764 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 36 [2021-11-09 08:44:11,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:44:11,765 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2021-11-09 08:44:11,765 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 22 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:44:11,765 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2021-11-09 08:44:11,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-09 08:44:11,766 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:44:11,767 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:44:11,816 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e879c0e6-a86a-4b59-b907-11787051e93f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-09 08:44:11,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e879c0e6-a86a-4b59-b907-11787051e93f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-09 08:44:11,982 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-09 08:44:11,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:44:11,982 INFO L85 PathProgramCache]: Analyzing trace with hash 578375222, now seen corresponding path program 4 times [2021-11-09 08:44:11,983 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:44:11,983 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660268811] [2021-11-09 08:44:11,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:44:11,983 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:44:12,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:44:12,659 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:44:12,660 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:44:12,660 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660268811] [2021-11-09 08:44:12,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660268811] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:44:12,660 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053993714] [2021-11-09 08:44:12,660 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 08:44:12,660 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:44:12,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e879c0e6-a86a-4b59-b907-11787051e93f/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:44:12,662 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e879c0e6-a86a-4b59-b907-11787051e93f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:44:12,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e879c0e6-a86a-4b59-b907-11787051e93f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-09 08:44:13,888 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 08:44:13,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:44:13,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 70 conjunts are in the unsatisfiable core [2021-11-09 08:44:13,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:44:13,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-11-09 08:44:13,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:44:13,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:44:14,003 INFO L354 Elim1Store]: treesize reduction 68, result has 18.1 percent of original size [2021-11-09 08:44:14,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 185 treesize of output 132 [2021-11-09 08:44:14,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:44:14,007 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:44:14,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:44:14,026 INFO L354 Elim1Store]: treesize reduction 60, result has 20.0 percent of original size [2021-11-09 08:44:14,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 72 treesize of output 48 [2021-11-09 08:44:14,042 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-09 08:44:14,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 48 treesize of output 52 [2021-11-09 08:44:14,259 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 [2021-11-09 08:44:14,269 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:44:14,344 INFO L354 Elim1Store]: treesize reduction 184, result has 13.6 percent of original size [2021-11-09 08:44:14,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 323 treesize of output 175 [2021-11-09 08:44:14,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:44:14,400 INFO L354 Elim1Store]: treesize reduction 300, result has 14.0 percent of original size [2021-11-09 08:44:14,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 5 case distinctions, treesize of input 262 treesize of output 147 [2021-11-09 08:44:14,428 INFO L354 Elim1Store]: treesize reduction 108, result has 20.0 percent of original size [2021-11-09 08:44:14,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 141 treesize of output 148 [2021-11-09 08:44:14,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:44:15,043 INFO L354 Elim1Store]: treesize reduction 310, result has 13.6 percent of original size [2021-11-09 08:44:15,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 12 case distinctions, treesize of input 403 treesize of output 239 [2021-11-09 08:44:15,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:44:15,186 INFO L354 Elim1Store]: treesize reduction 578, result has 12.8 percent of original size [2021-11-09 08:44:15,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 12 case distinctions, treesize of input 494 treesize of output 367 [2021-11-09 08:44:15,192 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 355 treesize of output 319 [2021-11-09 08:44:15,253 INFO L354 Elim1Store]: treesize reduction 210, result has 29.5 percent of original size [2021-11-09 08:44:15,254 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 9 case distinctions, treesize of input 316 treesize of output 370 [2021-11-09 08:44:15,287 INFO L354 Elim1Store]: treesize reduction 110, result has 27.2 percent of original size [2021-11-09 08:44:15,288 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 2 case distinctions, treesize of input 371 treesize of output 331 [2021-11-09 08:44:16,137 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:44:17,108 INFO L354 Elim1Store]: treesize reduction 238, result has 17.1 percent of original size [2021-11-09 08:44:17,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 9 new quantified variables, introduced 21 case distinctions, treesize of input 2077 treesize of output 754 [2021-11-09 08:44:17,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:44:17,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:44:18,696 INFO L354 Elim1Store]: treesize reduction 1486, result has 7.5 percent of original size [2021-11-09 08:44:18,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 12 new quantified variables, introduced 31 case distinctions, treesize of input 2090 treesize of output 783 [2021-11-09 08:44:19,458 INFO L354 Elim1Store]: treesize reduction 4588, result has 8.1 percent of original size [2021-11-09 08:44:19,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 11 case distinctions, treesize of input 2901 treesize of output 2942 [2021-11-09 08:44:19,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:44:19,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:44:19,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:44:20,828 INFO L354 Elim1Store]: treesize reduction 8311, result has 5.9 percent of original size [2021-11-09 08:44:20,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 48 case distinctions, treesize of input 2609 treesize of output 2446 [2021-11-09 08:44:21,016 INFO L354 Elim1Store]: treesize reduction 188, result has 22.0 percent of original size [2021-11-09 08:44:21,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 2462 treesize of output 2464 [2021-11-09 08:44:21,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:44:21,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:44:21,715 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 08:44:21,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 459 treesize of output 333 [2021-11-09 08:44:22,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:44:22,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:44:22,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:44:22,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:44:22,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:44:22,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:44:22,055 INFO L354 Elim1Store]: treesize reduction 9, result has 52.6 percent of original size [2021-11-09 08:44:22,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 12 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 2 case distinctions, treesize of input 316 treesize of output 212 [2021-11-09 08:44:22,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:44:22,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:44:22,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:44:22,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:44:22,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:44:22,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:44:22,227 INFO L354 Elim1Store]: treesize reduction 27, result has 27.0 percent of original size [2021-11-09 08:44:22,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 13 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 4 case distinctions, treesize of input 334 treesize of output 206 [2021-11-09 08:44:22,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:44:22,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:44:22,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:44:22,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:44:22,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:44:22,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:44:22,321 INFO L354 Elim1Store]: treesize reduction 19, result has 34.5 percent of original size [2021-11-09 08:44:22,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 12 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 3 case distinctions, treesize of input 426 treesize of output 204 [2021-11-09 08:44:23,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:44:23,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:44:23,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:44:23,988 INFO L354 Elim1Store]: treesize reduction 153, result has 5.0 percent of original size [2021-11-09 08:44:23,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 3 disjoint index pairs (out of 36 index pairs), introduced 13 new quantified variables, introduced 36 case distinctions, treesize of input 661 treesize of output 273 [2021-11-09 08:45:06,999 INFO L354 Elim1Store]: treesize reduction 329, result has 8.9 percent of original size [2021-11-09 08:45:07,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 1 disjoint index pairs (out of 36 index pairs), introduced 12 new quantified variables, introduced 36 case distinctions, treesize of input 396 treesize of output 208 [2021-11-09 08:45:07,076 INFO L354 Elim1Store]: treesize reduction 294, result has 1.0 percent of original size [2021-11-09 08:45:07,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 1 disjoint index pairs (out of 36 index pairs), introduced 12 new quantified variables, introduced 36 case distinctions, treesize of input 194 treesize of output 130 [2021-11-09 08:45:07,485 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:45:07,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053993714] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:45:07,486 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:45:07,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-11-09 08:45:07,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523057085] [2021-11-09 08:45:07,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-09 08:45:07,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:45:07,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-09 08:45:07,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=504, Unknown=2, NotChecked=0, Total=600 [2021-11-09 08:45:07,488 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand has 25 states, 25 states have (on average 2.8) internal successors, (70), 25 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:45:21,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:45:21,953 INFO L93 Difference]: Finished difference Result 109 states and 114 transitions. [2021-11-09 08:45:21,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-09 08:45:21,954 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.8) internal successors, (70), 25 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-11-09 08:45:21,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:45:21,954 INFO L225 Difference]: With dead ends: 109 [2021-11-09 08:45:21,954 INFO L226 Difference]: Without dead ends: 101 [2021-11-09 08:45:21,955 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=201, Invalid=1129, Unknown=2, NotChecked=0, Total=1332 [2021-11-09 08:45:21,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-11-09 08:45:21,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 76. [2021-11-09 08:45:21,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 74 states have (on average 1.0810810810810811) internal successors, (80), 75 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:45:21,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 80 transitions. [2021-11-09 08:45:21,970 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 80 transitions. Word has length 40 [2021-11-09 08:45:21,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:45:21,970 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 80 transitions. [2021-11-09 08:45:21,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.8) internal successors, (70), 25 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:45:21,971 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 80 transitions. [2021-11-09 08:45:21,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-09 08:45:21,972 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:45:21,972 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:45:22,004 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e879c0e6-a86a-4b59-b907-11787051e93f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-09 08:45:22,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e879c0e6-a86a-4b59-b907-11787051e93f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-09 08:45:22,188 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-09 08:45:22,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:45:22,189 INFO L85 PathProgramCache]: Analyzing trace with hash -226703515, now seen corresponding path program 5 times [2021-11-09 08:45:22,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:45:22,189 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838758207] [2021-11-09 08:45:22,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:45:22,189 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:45:22,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:45:22,938 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 6 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:45:22,938 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:45:22,939 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838758207] [2021-11-09 08:45:22,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838758207] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:45:22,939 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214319409] [2021-11-09 08:45:22,939 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 08:45:22,939 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:45:22,939 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e879c0e6-a86a-4b59-b907-11787051e93f/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:45:22,940 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e879c0e6-a86a-4b59-b907-11787051e93f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:45:22,941 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e879c0e6-a86a-4b59-b907-11787051e93f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-09 08:45:24,349 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-11-09 08:45:24,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:45:24,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 69 conjunts are in the unsatisfiable core [2021-11-09 08:45:24,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:45:24,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-11-09 08:45:24,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:45:24,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:45:24,450 INFO L354 Elim1Store]: treesize reduction 68, result has 18.1 percent of original size [2021-11-09 08:45:24,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 185 treesize of output 132 [2021-11-09 08:45:24,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:45:24,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:45:24,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:45:24,479 INFO L354 Elim1Store]: treesize reduction 80, result has 19.2 percent of original size [2021-11-09 08:45:24,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 129 treesize of output 64 [2021-11-09 08:45:24,496 INFO L354 Elim1Store]: treesize reduction 26, result has 35.0 percent of original size [2021-11-09 08:45:24,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 64 treesize of output 68 [2021-11-09 08:45:24,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:45:24,791 INFO L354 Elim1Store]: treesize reduction 184, result has 13.6 percent of original size [2021-11-09 08:45:24,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 323 treesize of output 175 [2021-11-09 08:45:24,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:45:24,832 INFO L354 Elim1Store]: treesize reduction 224, result has 14.2 percent of original size [2021-11-09 08:45:24,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 5 case distinctions, treesize of input 142 treesize of output 112 [2021-11-09 08:45:24,857 INFO L354 Elim1Store]: treesize reduction 68, result has 21.8 percent of original size [2021-11-09 08:45:24,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 106 treesize of output 113 [2021-11-09 08:45:25,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:45:25,276 INFO L354 Elim1Store]: treesize reduction 316, result has 12.0 percent of original size [2021-11-09 08:45:25,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 12 case distinctions, treesize of input 272 treesize of output 214 [2021-11-09 08:45:25,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:45:25,358 INFO L354 Elim1Store]: treesize reduction 496, result has 11.9 percent of original size [2021-11-09 08:45:25,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 12 case distinctions, treesize of input 212 treesize of output 188 [2021-11-09 08:45:25,396 INFO L354 Elim1Store]: treesize reduction 158, result has 16.8 percent of original size [2021-11-09 08:45:25,396 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 9 case distinctions, treesize of input 176 treesize of output 186 [2021-11-09 08:45:25,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:45:25,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:45:26,453 INFO L354 Elim1Store]: treesize reduction 1414, result has 4.3 percent of original size [2021-11-09 08:45:26,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 9 new quantified variables, introduced 24 case distinctions, treesize of input 519 treesize of output 343 [2021-11-09 08:45:26,588 INFO L354 Elim1Store]: treesize reduction 948, result has 6.1 percent of original size [2021-11-09 08:45:26,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 927 treesize of output 895 [2021-11-09 08:45:26,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:45:26,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:45:26,675 INFO L354 Elim1Store]: treesize reduction 596, result has 14.1 percent of original size [2021-11-09 08:45:26,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 22 case distinctions, treesize of input 442 treesize of output 385 [2021-11-09 08:45:26,695 INFO L354 Elim1Store]: treesize reduction 221, result has 8.3 percent of original size [2021-11-09 08:45:26,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 348 treesize of output 318 [2021-11-09 08:45:30,148 INFO L354 Elim1Store]: treesize reduction 354, result has 9.0 percent of original size [2021-11-09 08:45:30,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 1 disjoint index pairs (out of 45 index pairs), introduced 16 new quantified variables, introduced 45 case distinctions, treesize of input 332 treesize of output 176 [2021-11-09 08:45:30,227 INFO L354 Elim1Store]: treesize reduction 338, result has 2.0 percent of original size [2021-11-09 08:45:30,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 1 disjoint index pairs (out of 45 index pairs), introduced 13 new quantified variables, introduced 45 case distinctions, treesize of input 142 treesize of output 97 [2021-11-09 08:45:30,332 INFO L354 Elim1Store]: treesize reduction 24, result has 35.1 percent of original size [2021-11-09 08:45:30,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 31 [2021-11-09 08:45:30,373 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 6 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:45:30,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214319409] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:45:30,374 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:45:30,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2021-11-09 08:45:30,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305142455] [2021-11-09 08:45:30,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-09 08:45:30,403 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:45:30,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-09 08:45:30,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=612, Unknown=0, NotChecked=0, Total=702 [2021-11-09 08:45:30,405 INFO L87 Difference]: Start difference. First operand 76 states and 80 transitions. Second operand has 27 states, 27 states have (on average 2.888888888888889) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:45:32,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:45:32,476 INFO L93 Difference]: Finished difference Result 123 states and 127 transitions. [2021-11-09 08:45:32,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-09 08:45:32,476 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.888888888888889) internal successors, (78), 27 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 42 [2021-11-09 08:45:32,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:45:32,477 INFO L225 Difference]: With dead ends: 123 [2021-11-09 08:45:32,477 INFO L226 Difference]: Without dead ends: 107 [2021-11-09 08:45:32,478 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=152, Invalid=970, Unknown=0, NotChecked=0, Total=1122 [2021-11-09 08:45:32,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-11-09 08:45:32,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 99. [2021-11-09 08:45:32,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 97 states have (on average 1.0618556701030928) internal successors, (103), 98 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) [2021-11-09 08:45:32,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 103 transitions. [2021-11-09 08:45:32,492 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 103 transitions. Word has length 42 [2021-11-09 08:45:32,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:45:32,493 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 103 transitions. [2021-11-09 08:45:32,493 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.888888888888889) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:45:32,493 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 103 transitions. [2021-11-09 08:45:32,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-09 08:45:32,494 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:45:32,494 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:45:32,526 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e879c0e6-a86a-4b59-b907-11787051e93f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-09 08:45:32,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e879c0e6-a86a-4b59-b907-11787051e93f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:45:32,708 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-09 08:45:32,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:45:32,709 INFO L85 PathProgramCache]: Analyzing trace with hash 947807781, now seen corresponding path program 5 times [2021-11-09 08:45:32,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:45:32,709 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840150860] [2021-11-09 08:45:32,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:45:32,709 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:45:32,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:45:33,400 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:45:33,400 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:45:33,400 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840150860] [2021-11-09 08:45:33,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840150860] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:45:33,400 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324176484] [2021-11-09 08:45:33,400 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 08:45:33,401 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:45:33,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e879c0e6-a86a-4b59-b907-11787051e93f/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:45:33,401 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e879c0e6-a86a-4b59-b907-11787051e93f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:45:33,402 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e879c0e6-a86a-4b59-b907-11787051e93f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-09 08:45:35,019 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-11-09 08:45:35,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:45:35,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 64 conjunts are in the unsatisfiable core [2021-11-09 08:45:35,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:45:35,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-11-09 08:45:35,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:45:35,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:45:35,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:45:35,100 INFO L354 Elim1Store]: treesize reduction 68, result has 18.1 percent of original size [2021-11-09 08:45:35,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 185 treesize of output 132 [2021-11-09 08:45:35,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:45:35,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:45:35,120 INFO L354 Elim1Store]: treesize reduction 68, result has 18.1 percent of original size [2021-11-09 08:45:35,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 104 treesize of output 51 [2021-11-09 08:45:35,133 INFO L354 Elim1Store]: treesize reduction 26, result has 35.0 percent of original size [2021-11-09 08:45:35,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 64 treesize of output 68 [2021-11-09 08:45:35,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:45:35,382 INFO L354 Elim1Store]: treesize reduction 184, result has 13.6 percent of original size [2021-11-09 08:45:35,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 323 treesize of output 175 [2021-11-09 08:45:35,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:45:35,428 INFO L354 Elim1Store]: treesize reduction 224, result has 14.2 percent of original size [2021-11-09 08:45:35,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 5 case distinctions, treesize of input 142 treesize of output 112 [2021-11-09 08:45:35,450 INFO L354 Elim1Store]: treesize reduction 68, result has 21.8 percent of original size [2021-11-09 08:45:35,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 106 treesize of output 113 [2021-11-09 08:45:35,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:45:35,918 INFO L354 Elim1Store]: treesize reduction 316, result has 12.0 percent of original size [2021-11-09 08:45:35,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 477 treesize of output 214 [2021-11-09 08:45:35,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:45:36,003 INFO L354 Elim1Store]: treesize reduction 432, result has 12.0 percent of original size [2021-11-09 08:45:36,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 12 case distinctions, treesize of input 192 treesize of output 168 [2021-11-09 08:45:36,041 INFO L354 Elim1Store]: treesize reduction 134, result has 17.3 percent of original size [2021-11-09 08:45:36,042 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 9 case distinctions, treesize of input 156 treesize of output 166 [2021-11-09 08:45:36,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:45:36,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:45:36,920 INFO L354 Elim1Store]: treesize reduction 1414, result has 4.3 percent of original size [2021-11-09 08:45:36,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 24 case distinctions, treesize of input 406 treesize of output 307 [2021-11-09 08:45:36,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:45:36,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:45:37,010 INFO L354 Elim1Store]: treesize reduction 340, result has 19.4 percent of original size [2021-11-09 08:45:37,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 22 case distinctions, treesize of input 278 treesize of output 269 [2021-11-09 08:45:37,019 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 240 treesize of output 236 [2021-11-09 08:45:37,037 INFO L354 Elim1Store]: treesize reduction 141, result has 2.8 percent of original size [2021-11-09 08:45:37,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 236 treesize of output 214 [2021-11-09 08:45:42,632 INFO L354 Elim1Store]: treesize reduction 471, result has 8.2 percent of original size [2021-11-09 08:45:42,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 1 disjoint index pairs (out of 55 index pairs), introduced 18 new quantified variables, introduced 55 case distinctions, treesize of input 319 treesize of output 197 [2021-11-09 08:45:42,778 INFO L354 Elim1Store]: treesize reduction 447, result has 2.2 percent of original size [2021-11-09 08:45:42,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 1 disjoint index pairs (out of 55 index pairs), introduced 15 new quantified variables, introduced 55 case distinctions, treesize of input 138 treesize of output 99 [2021-11-09 08:45:42,811 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 15 treesize of output 7 [2021-11-09 08:45:42,818 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:45:42,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324176484] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:45:42,818 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:45:42,818 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 23 [2021-11-09 08:45:42,818 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546169354] [2021-11-09 08:45:42,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-09 08:45:42,819 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:45:42,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-09 08:45:42,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-11-09 08:45:42,820 INFO L87 Difference]: Start difference. First operand 99 states and 103 transitions. Second operand has 23 states, 23 states have (on average 3.739130434782609) internal successors, (86), 23 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:45:45,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:45:45,968 INFO L93 Difference]: Finished difference Result 107 states and 110 transitions. [2021-11-09 08:45:45,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-09 08:45:45,968 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.739130434782609) internal successors, (86), 23 states have internal predecessors, (86), 0 states have call successors, (0), 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 46 [2021-11-09 08:45:45,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:45:45,969 INFO L225 Difference]: With dead ends: 107 [2021-11-09 08:45:45,969 INFO L226 Difference]: Without dead ends: 76 [2021-11-09 08:45:45,970 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-11-09 08:45:45,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-11-09 08:45:45,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2021-11-09 08:45:45,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 74 states have (on average 1.0675675675675675) internal successors, (79), 75 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:45:45,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 79 transitions. [2021-11-09 08:45:45,984 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 79 transitions. Word has length 46 [2021-11-09 08:45:45,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:45:45,984 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 79 transitions. [2021-11-09 08:45:45,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.739130434782609) internal successors, (86), 23 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:45:45,984 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 79 transitions. [2021-11-09 08:45:45,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-09 08:45:45,985 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:45:45,985 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:45:46,017 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e879c0e6-a86a-4b59-b907-11787051e93f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-09 08:45:46,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e879c0e6-a86a-4b59-b907-11787051e93f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:45:46,188 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-09 08:45:46,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:45:46,189 INFO L85 PathProgramCache]: Analyzing trace with hash -1657426098, now seen corresponding path program 6 times [2021-11-09 08:45:46,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:45:46,189 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598302273] [2021-11-09 08:45:46,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:45:46,189 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:45:46,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:45:47,007 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:45:47,007 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:45:47,007 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598302273] [2021-11-09 08:45:47,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598302273] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:45:47,007 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301598263] [2021-11-09 08:45:47,008 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 08:45:47,008 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:45:47,008 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e879c0e6-a86a-4b59-b907-11787051e93f/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:45:47,009 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e879c0e6-a86a-4b59-b907-11787051e93f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:45:47,010 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e879c0e6-a86a-4b59-b907-11787051e93f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-09 08:45:49,612 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-11-09 08:45:49,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:45:49,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 88 conjunts are in the unsatisfiable core [2021-11-09 08:45:49,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:45:49,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-11-09 08:45:49,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:45:49,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:45:49,749 INFO L354 Elim1Store]: treesize reduction 68, result has 18.1 percent of original size [2021-11-09 08:45:49,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 185 treesize of output 132 [2021-11-09 08:45:49,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:45:49,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:45:49,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:45:49,783 INFO L354 Elim1Store]: treesize reduction 60, result has 20.0 percent of original size [2021-11-09 08:45:49,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 72 treesize of output 48 [2021-11-09 08:45:49,798 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-09 08:45:49,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 48 treesize of output 52 [2021-11-09 08:45:50,022 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:45:50,093 INFO L354 Elim1Store]: treesize reduction 184, result has 13.6 percent of original size [2021-11-09 08:45:50,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 323 treesize of output 175 [2021-11-09 08:45:50,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:45:50,140 INFO L354 Elim1Store]: treesize reduction 224, result has 14.2 percent of original size [2021-11-09 08:45:50,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 5 case distinctions, treesize of input 142 treesize of output 112 [2021-11-09 08:45:50,165 INFO L354 Elim1Store]: treesize reduction 68, result has 21.8 percent of original size [2021-11-09 08:45:50,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 106 treesize of output 113 [2021-11-09 08:45:50,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:45:50,614 INFO L354 Elim1Store]: treesize reduction 316, result has 12.0 percent of original size [2021-11-09 08:45:50,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 12 case distinctions, treesize of input 272 treesize of output 214 [2021-11-09 08:45:50,620 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:45:50,693 INFO L354 Elim1Store]: treesize reduction 496, result has 11.9 percent of original size [2021-11-09 08:45:50,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 12 case distinctions, treesize of input 212 treesize of output 188 [2021-11-09 08:45:50,730 INFO L354 Elim1Store]: treesize reduction 158, result has 16.8 percent of original size [2021-11-09 08:45:50,730 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 9 case distinctions, treesize of input 176 treesize of output 186 [2021-11-09 08:45:50,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2021-11-09 08:45:51,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:45:51,589 INFO L354 Elim1Store]: treesize reduction 680, result has 10.6 percent of original size [2021-11-09 08:45:51,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 23 case distinctions, treesize of input 400 treesize of output 365 [2021-11-09 08:45:51,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:45:51,741 INFO L354 Elim1Store]: treesize reduction 464, result has 10.9 percent of original size [2021-11-09 08:45:51,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 23 case distinctions, treesize of input 319 treesize of output 226 [2021-11-09 08:45:51,808 INFO L354 Elim1Store]: treesize reduction 244, result has 14.4 percent of original size [2021-11-09 08:45:51,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 304 treesize of output 317 [2021-11-09 08:45:51,846 INFO L354 Elim1Store]: treesize reduction 100, result has 23.1 percent of original size [2021-11-09 08:45:51,847 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 3 case distinctions, treesize of input 295 treesize of output 277 [2021-11-09 08:45:52,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:45:52,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:45:53,467 INFO L354 Elim1Store]: treesize reduction 1802, result has 4.1 percent of original size [2021-11-09 08:45:53,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 3 disjoint index pairs (out of 28 index pairs), introduced 11 new quantified variables, introduced 39 case distinctions, treesize of input 527 treesize of output 393 [2021-11-09 08:45:53,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:45:53,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:45:53,637 INFO L354 Elim1Store]: treesize reduction 600, result has 16.7 percent of original size [2021-11-09 08:45:53,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 3 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 37 case distinctions, treesize of input 439 treesize of output 436 [2021-11-09 08:45:53,676 INFO L354 Elim1Store]: treesize reduction 257, result has 1.5 percent of original size [2021-11-09 08:45:53,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 401 treesize of output 365 [2021-11-09 08:45:53,695 INFO L354 Elim1Store]: treesize reduction 69, result has 17.9 percent of original size [2021-11-09 08:45:53,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 347 treesize of output 323 [2021-11-09 08:45:53,704 INFO L354 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2021-11-09 08:45:53,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 317 treesize of output 308 [2021-11-09 08:45:53,729 INFO L354 Elim1Store]: treesize reduction 88, result has 23.5 percent of original size [2021-11-09 08:45:53,729 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 3 case distinctions, treesize of input 302 treesize of output 304 [2021-11-09 08:45:59,644 INFO L354 Elim1Store]: treesize reduction 486, result has 7.4 percent of original size [2021-11-09 08:45:59,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 1 disjoint index pairs (out of 66 index pairs), introduced 18 new quantified variables, introduced 66 case distinctions, treesize of input 384 treesize of output 224 [2021-11-09 08:45:59,771 INFO L354 Elim1Store]: treesize reduction 466, result has 1.5 percent of original size [2021-11-09 08:45:59,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 1 disjoint index pairs (out of 66 index pairs), introduced 15 new quantified variables, introduced 66 case distinctions, treesize of input 188 treesize of output 123 [2021-11-09 08:46:00,094 INFO L354 Elim1Store]: treesize reduction 76, result has 27.6 percent of original size [2021-11-09 08:46:00,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 65 [2021-11-09 08:46:00,104 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:46:00,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301598263] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:46:00,105 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:46:00,105 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 18] total 28 [2021-11-09 08:46:00,105 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439605545] [2021-11-09 08:46:00,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-09 08:46:00,106 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:46:00,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-09 08:46:00,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=667, Unknown=0, NotChecked=0, Total=756 [2021-11-09 08:46:00,107 INFO L87 Difference]: Start difference. First operand 76 states and 79 transitions. Second operand has 28 states, 28 states have (on average 3.107142857142857) internal successors, (87), 28 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) [2021-11-09 08:46:07,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:46:07,229 INFO L93 Difference]: Finished difference Result 112 states and 117 transitions. [2021-11-09 08:46:07,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-09 08:46:07,230 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.107142857142857) internal successors, (87), 28 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 46 [2021-11-09 08:46:07,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:46:07,231 INFO L225 Difference]: With dead ends: 112 [2021-11-09 08:46:07,231 INFO L226 Difference]: Without dead ends: 110 [2021-11-09 08:46:07,232 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=154, Invalid=1252, Unknown=0, NotChecked=0, Total=1406 [2021-11-09 08:46:07,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-11-09 08:46:07,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 82. [2021-11-09 08:46:07,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 80 states have (on average 1.075) internal successors, (86), 81 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:46:07,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 86 transitions. [2021-11-09 08:46:07,248 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 86 transitions. Word has length 46 [2021-11-09 08:46:07,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:46:07,249 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 86 transitions. [2021-11-09 08:46:07,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.107142857142857) internal successors, (87), 28 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) [2021-11-09 08:46:07,249 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 86 transitions. [2021-11-09 08:46:07,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-09 08:46:07,250 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:46:07,250 INFO L513 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:46:07,294 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e879c0e6-a86a-4b59-b907-11787051e93f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-11-09 08:46:07,466 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e879c0e6-a86a-4b59-b907-11787051e93f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:46:07,467 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-09 08:46:07,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:46:07,467 INFO L85 PathProgramCache]: Analyzing trace with hash -83120632, now seen corresponding path program 6 times [2021-11-09 08:46:07,467 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:46:07,467 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683128386] [2021-11-09 08:46:07,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:46:07,467 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:46:07,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:46:08,291 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-09 08:46:08,291 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:46:08,291 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683128386] [2021-11-09 08:46:08,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683128386] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:46:08,291 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335122577] [2021-11-09 08:46:08,291 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 08:46:08,291 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:46:08,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e879c0e6-a86a-4b59-b907-11787051e93f/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:46:08,292 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e879c0e6-a86a-4b59-b907-11787051e93f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:46:08,294 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e879c0e6-a86a-4b59-b907-11787051e93f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-09 08:46:13,879 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-11-09 08:46:13,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:46:13,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 98 conjunts are in the unsatisfiable core [2021-11-09 08:46:13,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:46:13,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-11-09 08:46:13,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:46:13,954 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:46:13,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:46:13,979 INFO L354 Elim1Store]: treesize reduction 68, result has 18.1 percent of original size [2021-11-09 08:46:13,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 185 treesize of output 132 [2021-11-09 08:46:13,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:46:13,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:46:14,001 INFO L354 Elim1Store]: treesize reduction 68, result has 18.1 percent of original size [2021-11-09 08:46:14,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 104 treesize of output 51 [2021-11-09 08:46:14,017 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-09 08:46:14,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 48 treesize of output 52 [2021-11-09 08:46:14,215 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 [2021-11-09 08:46:14,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:46:14,297 INFO L354 Elim1Store]: treesize reduction 184, result has 13.6 percent of original size [2021-11-09 08:46:14,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 323 treesize of output 175 [2021-11-09 08:46:14,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:46:14,346 INFO L354 Elim1Store]: treesize reduction 224, result has 14.2 percent of original size [2021-11-09 08:46:14,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 5 case distinctions, treesize of input 142 treesize of output 112 [2021-11-09 08:46:14,371 INFO L354 Elim1Store]: treesize reduction 68, result has 21.8 percent of original size [2021-11-09 08:46:14,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 106 treesize of output 113 [2021-11-09 08:46:14,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:46:14,882 INFO L354 Elim1Store]: treesize reduction 316, result has 12.0 percent of original size [2021-11-09 08:46:14,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 559 treesize of output 264 [2021-11-09 08:46:14,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:46:14,990 INFO L354 Elim1Store]: treesize reduction 584, result has 11.9 percent of original size [2021-11-09 08:46:14,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 12 case distinctions, treesize of input 491 treesize of output 358 [2021-11-09 08:46:15,039 INFO L354 Elim1Store]: treesize reduction 254, result has 14.8 percent of original size [2021-11-09 08:46:15,041 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 9 case distinctions, treesize of input 346 treesize of output 356 [2021-11-09 08:46:15,050 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 353 treesize of output 272 [2021-11-09 08:46:15,062 INFO L354 Elim1Store]: treesize reduction 53, result has 22.1 percent of original size [2021-11-09 08:46:15,062 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 254 treesize of output 253 [2021-11-09 08:46:15,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:46:15,896 INFO L354 Elim1Store]: treesize reduction 464, result has 10.9 percent of original size [2021-11-09 08:46:15,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 9 new quantified variables, introduced 23 case distinctions, treesize of input 776 treesize of output 314 [2021-11-09 08:46:15,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:46:16,049 INFO L354 Elim1Store]: treesize reduction 788, result has 10.6 percent of original size [2021-11-09 08:46:16,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 23 case distinctions, treesize of input 475 treesize of output 372 [2021-11-09 08:46:16,107 INFO L354 Elim1Store]: treesize reduction 288, result has 13.5 percent of original size [2021-11-09 08:46:16,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 354 treesize of output 367 [2021-11-09 08:46:16,116 INFO L354 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2021-11-09 08:46:16,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 352 treesize of output 319 [2021-11-09 08:46:16,125 INFO L354 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2021-11-09 08:46:16,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 313 treesize of output 292 [2021-11-09 08:46:16,146 INFO L354 Elim1Store]: treesize reduction 112, result has 19.4 percent of original size [2021-11-09 08:46:16,146 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 3 case distinctions, treesize of input 286 treesize of output 288 [2021-11-09 08:46:16,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:46:17,253 INFO L354 Elim1Store]: treesize reduction 628, result has 10.2 percent of original size [2021-11-09 08:46:17,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 11 new quantified variables, introduced 38 case distinctions, treesize of input 592 treesize of output 360 [2021-11-09 08:46:17,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:46:17,461 INFO L354 Elim1Store]: treesize reduction 1436, result has 9.5 percent of original size [2021-11-09 08:46:17,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 38 case distinctions, treesize of input 624 treesize of output 576 [2021-11-09 08:46:17,472 INFO L354 Elim1Store]: treesize reduction 96, result has 1.0 percent of original size [2021-11-09 08:46:17,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 552 treesize of output 498 [2021-11-09 08:46:17,546 INFO L354 Elim1Store]: treesize reduction 506, result has 12.2 percent of original size [2021-11-09 08:46:17,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 20 case distinctions, treesize of input 489 treesize of output 505 [2021-11-09 08:46:17,555 INFO L354 Elim1Store]: treesize reduction 96, result has 1.0 percent of original size [2021-11-09 08:46:17,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 487 treesize of output 481 [2021-11-09 08:46:17,586 INFO L354 Elim1Store]: treesize reduction 288, result has 16.8 percent of original size [2021-11-09 08:46:17,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 472 treesize of output 477 [2021-11-09 08:46:18,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:46:18,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:46:18,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:46:18,745 INFO L354 Elim1Store]: treesize reduction 160, result has 0.6 percent of original size [2021-11-09 08:46:18,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 3 disjoint index pairs (out of 45 index pairs), introduced 15 new quantified variables, introduced 45 case distinctions, treesize of input 3119 treesize of output 816 [2021-11-09 08:46:18,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:46:19,683 INFO L354 Elim1Store]: treesize reduction 1068, result has 7.4 percent of original size [2021-11-09 08:46:19,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 1 disjoint index pairs (out of 45 index pairs), introduced 16 new quantified variables, introduced 57 case distinctions, treesize of input 1622 treesize of output 517 [2021-11-09 08:46:20,020 INFO L354 Elim1Store]: treesize reduction 1796, result has 4.4 percent of original size [2021-11-09 08:46:20,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 833 treesize of output 806 [2021-11-09 08:46:20,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:46:20,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:46:20,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:46:20,075 INFO L354 Elim1Store]: treesize reduction 384, result has 0.3 percent of original size [2021-11-09 08:46:20,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 3 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 768 treesize of output 759 [2021-11-09 08:46:20,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:46:20,249 INFO L354 Elim1Store]: treesize reduction 832, result has 13.2 percent of original size [2021-11-09 08:46:20,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 3 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 55 case distinctions, treesize of input 495 treesize of output 473 [2021-11-09 08:46:20,298 INFO L354 Elim1Store]: treesize reduction 377, result has 2.1 percent of original size [2021-11-09 08:46:20,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 443 treesize of output 401 [2021-11-09 08:46:32,522 INFO L354 Elim1Store]: treesize reduction 473, result has 8.5 percent of original size [2021-11-09 08:46:32,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 13 select indices, 13 select index equivalence classes, 1 disjoint index pairs (out of 78 index pairs), introduced 17 new quantified variables, introduced 78 case distinctions, treesize of input 402 treesize of output 241 [2021-11-09 08:46:32,655 INFO L354 Elim1Store]: treesize reduction 466, result has 0.6 percent of original size [2021-11-09 08:46:32,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 13 select indices, 13 select index equivalence classes, 1 disjoint index pairs (out of 78 index pairs), introduced 15 new quantified variables, introduced 78 case distinctions, treesize of input 216 treesize of output 145 [2021-11-09 08:46:32,998 INFO L354 Elim1Store]: treesize reduction 160, result has 22.0 percent of original size [2021-11-09 08:46:32,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 105 treesize of output 115 [2021-11-09 08:46:33,077 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:46:33,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335122577] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:46:33,078 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:46:33,078 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 18] total 29 [2021-11-09 08:46:33,078 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287560087] [2021-11-09 08:46:33,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-09 08:46:33,078 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:46:33,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-09 08:46:33,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=685, Unknown=2, NotChecked=0, Total=812 [2021-11-09 08:46:33,079 INFO L87 Difference]: Start difference. First operand 82 states and 86 transitions. Second operand has 29 states, 29 states have (on average 2.7241379310344827) internal successors, (79), 29 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:46:55,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:46:55,017 INFO L93 Difference]: Finished difference Result 129 states and 136 transitions. [2021-11-09 08:46:55,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-09 08:46:55,017 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.7241379310344827) internal successors, (79), 29 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 48 [2021-11-09 08:46:55,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:46:55,018 INFO L225 Difference]: With dead ends: 129 [2021-11-09 08:46:55,018 INFO L226 Difference]: Without dead ends: 121 [2021-11-09 08:46:55,020 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=263, Invalid=1626, Unknown=3, NotChecked=0, Total=1892 [2021-11-09 08:46:55,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-11-09 08:46:55,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 98. [2021-11-09 08:46:55,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 96 states have (on average 1.0625) internal successors, (102), 97 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:46:55,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 102 transitions. [2021-11-09 08:46:55,034 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 102 transitions. Word has length 48 [2021-11-09 08:46:55,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:46:55,034 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 102 transitions. [2021-11-09 08:46:55,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.7241379310344827) internal successors, (79), 29 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:46:55,035 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 102 transitions. [2021-11-09 08:46:55,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-09 08:46:55,036 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:46:55,036 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:46:55,071 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e879c0e6-a86a-4b59-b907-11787051e93f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-11-09 08:46:55,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e879c0e6-a86a-4b59-b907-11787051e93f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:46:55,239 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-09 08:46:55,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:46:55,239 INFO L85 PathProgramCache]: Analyzing trace with hash -1958792818, now seen corresponding path program 7 times [2021-11-09 08:46:55,239 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:46:55,240 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694906796] [2021-11-09 08:46:55,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:46:55,240 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:46:55,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:46:56,226 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:46:56,226 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:46:56,226 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694906796] [2021-11-09 08:46:56,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694906796] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:46:56,227 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106713467] [2021-11-09 08:46:56,227 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 08:46:56,227 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:46:56,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e879c0e6-a86a-4b59-b907-11787051e93f/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:46:56,233 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e879c0e6-a86a-4b59-b907-11787051e93f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:46:56,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e879c0e6-a86a-4b59-b907-11787051e93f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-09 08:46:58,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:46:58,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 81 conjunts are in the unsatisfiable core [2021-11-09 08:46:58,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:46:58,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-11-09 08:46:58,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:46:58,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:46:58,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:46:58,460 INFO L354 Elim1Store]: treesize reduction 68, result has 18.1 percent of original size [2021-11-09 08:46:58,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 185 treesize of output 132 [2021-11-09 08:46:58,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:46:58,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:46:58,480 INFO L354 Elim1Store]: treesize reduction 68, result has 18.1 percent of original size [2021-11-09 08:46:58,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 104 treesize of output 51 [2021-11-09 08:46:58,497 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-09 08:46:58,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 48 treesize of output 52 [2021-11-09 08:46:58,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:46:58,788 INFO L354 Elim1Store]: treesize reduction 184, result has 13.6 percent of original size [2021-11-09 08:46:58,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 323 treesize of output 175 [2021-11-09 08:46:58,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:46:58,831 INFO L354 Elim1Store]: treesize reduction 300, result has 14.0 percent of original size [2021-11-09 08:46:58,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 5 case distinctions, treesize of input 262 treesize of output 147 [2021-11-09 08:46:58,855 INFO L354 Elim1Store]: treesize reduction 108, result has 20.0 percent of original size [2021-11-09 08:46:58,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 141 treesize of output 148 [2021-11-09 08:46:59,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:46:59,357 INFO L354 Elim1Store]: treesize reduction 316, result has 12.0 percent of original size [2021-11-09 08:46:59,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 12 case distinctions, treesize of input 388 treesize of output 214 [2021-11-09 08:46:59,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:46:59,457 INFO L354 Elim1Store]: treesize reduction 492, result has 12.0 percent of original size [2021-11-09 08:46:59,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 12 case distinctions, treesize of input 228 treesize of output 192 [2021-11-09 08:46:59,494 INFO L354 Elim1Store]: treesize reduction 158, result has 16.8 percent of original size [2021-11-09 08:46:59,495 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 9 case distinctions, treesize of input 180 treesize of output 190 [2021-11-09 08:46:59,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2021-11-09 08:46:59,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:47:00,217 INFO L354 Elim1Store]: treesize reduction 458, result has 12.1 percent of original size [2021-11-09 08:47:00,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 9 new quantified variables, introduced 23 case distinctions, treesize of input 670 treesize of output 282 [2021-11-09 08:47:00,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:47:00,439 INFO L354 Elim1Store]: treesize reduction 1034, result has 10.9 percent of original size [2021-11-09 08:47:00,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 23 case distinctions, treesize of input 684 treesize of output 523 [2021-11-09 08:47:00,454 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 505 treesize of output 457 [2021-11-09 08:47:00,458 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 454 treesize of output 394 [2021-11-09 08:47:00,525 INFO L354 Elim1Store]: treesize reduction 392, result has 27.5 percent of original size [2021-11-09 08:47:00,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 391 treesize of output 488 [2021-11-09 08:47:00,548 INFO L354 Elim1Store]: treesize reduction 65, result has 22.6 percent of original size [2021-11-09 08:47:00,548 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 473 treesize of output 472 [2021-11-09 08:47:01,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:47:01,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:47:02,980 INFO L354 Elim1Store]: treesize reduction 354, result has 15.1 percent of original size [2021-11-09 08:47:02,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 12 new quantified variables, introduced 36 case distinctions, treesize of input 2627 treesize of output 797 [2021-11-09 08:47:03,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:47:03,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:47:04,956 INFO L354 Elim1Store]: treesize reduction 1936, result has 7.1 percent of original size [2021-11-09 08:47:04,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 48 case distinctions, treesize of input 2628 treesize of output 840 [2021-11-09 08:47:05,153 INFO L354 Elim1Store]: treesize reduction 276, result has 8.3 percent of original size [2021-11-09 08:47:05,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 1982 treesize of output 1958 [2021-11-09 08:47:05,344 INFO L354 Elim1Store]: treesize reduction 270, result has 12.1 percent of original size [2021-11-09 08:47:05,347 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 4 case distinctions, treesize of input 1940 treesize of output 1902 [2021-11-09 08:47:05,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:47:05,652 INFO L354 Elim1Store]: treesize reduction 850, result has 12.3 percent of original size [2021-11-09 08:47:05,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 36 case distinctions, treesize of input 1896 treesize of output 1883 [2021-11-09 08:47:05,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:47:05,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:47:05,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:47:06,841 INFO L354 Elim1Store]: treesize reduction 5240, result has 9.2 percent of original size [2021-11-09 08:47:06,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 8 select indices, 8 select index equivalence classes, 3 disjoint index pairs (out of 28 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 1683 treesize of output 1761 [2021-11-09 08:47:06,921 INFO L354 Elim1Store]: treesize reduction 105, result has 13.9 percent of original size [2021-11-09 08:47:06,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 1941 treesize of output 1920 [2021-11-09 08:47:07,042 INFO L354 Elim1Store]: treesize reduction 452, result has 22.6 percent of original size [2021-11-09 08:47:07,043 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 8 case distinctions, treesize of input 1914 treesize of output 1987 [2021-11-09 08:47:07,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 23 [2021-11-09 08:47:07,392 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 08:47:07,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 40 [2021-11-09 08:47:07,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:47:07,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:47:07,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:47:07,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:47:07,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:47:07,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:47:07,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:47:07,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:47:07,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:47:07,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:47:07,488 INFO L354 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2021-11-09 08:47:07,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 17 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 2 case distinctions, treesize of input 313 treesize of output 155 [2021-11-09 08:47:10,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:47:10,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:47:10,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:47:10,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:47:10,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:47:10,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:47:10,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:47:10,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:47:10,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:47:10,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:47:10,961 INFO L354 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2021-11-09 08:47:10,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 16 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 2 case distinctions, treesize of input 230 treesize of output 112 [2021-11-09 08:47:11,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:47:11,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:47:11,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:47:11,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:47:11,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:47:11,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:47:11,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:47:11,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:47:11,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:47:11,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:47:11,082 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-09 08:47:11,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 17 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 2 case distinctions, treesize of input 264 treesize of output 120 [2021-11-09 08:47:11,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:47:11,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:47:11,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:47:11,162 INFO L354 Elim1Store]: treesize reduction 233, result has 3.3 percent of original size [2021-11-09 08:47:11,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 3 disjoint index pairs (out of 55 index pairs), introduced 15 new quantified variables, introduced 55 case distinctions, treesize of input 683 treesize of output 287 [2021-11-09 08:47:11,184 INFO L354 Elim1Store]: treesize reduction 93, result has 30.1 percent of original size [2021-11-09 08:47:11,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 678 treesize of output 654 [2021-11-09 08:48:00,284 INFO L354 Elim1Store]: treesize reduction 546, result has 7.9 percent of original size [2021-11-09 08:48:00,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 1 disjoint index pairs (out of 66 index pairs), introduced 19 new quantified variables, introduced 66 case distinctions, treesize of input 613 treesize of output 252 [2021-11-09 08:48:00,448 INFO L354 Elim1Store]: treesize reduction 534, result has 1.3 percent of original size [2021-11-09 08:48:00,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 1 disjoint index pairs (out of 66 index pairs), introduced 16 new quantified variables, introduced 66 case distinctions, treesize of input 232 treesize of output 162 [2021-11-09 08:48:00,708 INFO L354 Elim1Store]: treesize reduction 72, result has 11.1 percent of original size [2021-11-09 08:48:00,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 62 treesize of output 46 [2021-11-09 08:48:00,772 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:48:00,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106713467] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:48:00,772 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:48:00,772 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-11-09 08:48:00,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814299261] [2021-11-09 08:48:00,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-09 08:48:00,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:48:00,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-09 08:48:00,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=818, Unknown=2, NotChecked=0, Total=930 [2021-11-09 08:48:00,775 INFO L87 Difference]: Start difference. First operand 98 states and 102 transitions. Second operand has 31 states, 31 states have (on average 2.903225806451613) internal successors, (90), 31 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:48:09,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:48:09,793 INFO L93 Difference]: Finished difference Result 135 states and 139 transitions. [2021-11-09 08:48:09,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-09 08:48:09,793 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.903225806451613) internal successors, (90), 31 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 50 [2021-11-09 08:48:09,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:48:09,795 INFO L225 Difference]: With dead ends: 135 [2021-11-09 08:48:09,795 INFO L226 Difference]: Without dead ends: 127 [2021-11-09 08:48:09,797 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=233, Invalid=1835, Unknown=2, NotChecked=0, Total=2070 [2021-11-09 08:48:09,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-11-09 08:48:09,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 98. [2021-11-09 08:48:09,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 96 states have (on average 1.0520833333333333) internal successors, (101), 97 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:48:09,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 101 transitions. [2021-11-09 08:48:09,820 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 101 transitions. Word has length 50 [2021-11-09 08:48:09,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:48:09,821 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 101 transitions. [2021-11-09 08:48:09,821 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.903225806451613) internal successors, (90), 31 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:48:09,821 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 101 transitions. [2021-11-09 08:48:09,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-09 08:48:09,822 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:48:09,822 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:48:09,857 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e879c0e6-a86a-4b59-b907-11787051e93f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-09 08:48:10,022 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e879c0e6-a86a-4b59-b907-11787051e93f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-09 08:48:10,023 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-09 08:48:10,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:48:10,024 INFO L85 PathProgramCache]: Analyzing trace with hash 1096234173, now seen corresponding path program 7 times [2021-11-09 08:48:10,024 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:48:10,024 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483659870] [2021-11-09 08:48:10,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:48:10,025 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:48:10,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:48:11,143 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 8 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:48:11,143 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:48:11,143 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483659870] [2021-11-09 08:48:11,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483659870] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:48:11,143 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709644367] [2021-11-09 08:48:11,143 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 08:48:11,144 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:48:11,144 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e879c0e6-a86a-4b59-b907-11787051e93f/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:48:11,144 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e879c0e6-a86a-4b59-b907-11787051e93f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:48:11,146 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e879c0e6-a86a-4b59-b907-11787051e93f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-09 08:48:14,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:48:14,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 82 conjunts are in the unsatisfiable core [2021-11-09 08:48:14,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:48:14,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-11-09 08:48:14,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:48:14,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:48:14,120 INFO L354 Elim1Store]: treesize reduction 68, result has 18.1 percent of original size [2021-11-09 08:48:14,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 185 treesize of output 132 [2021-11-09 08:48:14,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:48:14,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:48:14,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:48:14,145 INFO L354 Elim1Store]: treesize reduction 60, result has 20.0 percent of original size [2021-11-09 08:48:14,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 72 treesize of output 48 [2021-11-09 08:48:14,160 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-09 08:48:14,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 48 treesize of output 52 [2021-11-09 08:48:14,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:48:14,450 INFO L354 Elim1Store]: treesize reduction 184, result has 13.6 percent of original size [2021-11-09 08:48:14,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 323 treesize of output 175 [2021-11-09 08:48:14,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:48:14,499 INFO L354 Elim1Store]: treesize reduction 224, result has 14.2 percent of original size [2021-11-09 08:48:14,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 5 case distinctions, treesize of input 142 treesize of output 112 [2021-11-09 08:48:14,525 INFO L354 Elim1Store]: treesize reduction 68, result has 21.8 percent of original size [2021-11-09 08:48:14,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 106 treesize of output 113 [2021-11-09 08:48:14,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:48:15,019 INFO L354 Elim1Store]: treesize reduction 316, result has 12.0 percent of original size [2021-11-09 08:48:15,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 477 treesize of output 214 [2021-11-09 08:48:15,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:48:15,112 INFO L354 Elim1Store]: treesize reduction 528, result has 11.9 percent of original size [2021-11-09 08:48:15,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 12 case distinctions, treesize of input 312 treesize of output 203 [2021-11-09 08:48:15,151 INFO L354 Elim1Store]: treesize reduction 190, result has 15.9 percent of original size [2021-11-09 08:48:15,151 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 9 case distinctions, treesize of input 191 treesize of output 201 [2021-11-09 08:48:15,631 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:48:15,852 INFO L354 Elim1Store]: treesize reduction 464, result has 10.9 percent of original size [2021-11-09 08:48:15,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 23 case distinctions, treesize of input 450 treesize of output 257 [2021-11-09 08:48:15,878 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:48:16,003 INFO L354 Elim1Store]: treesize reduction 744, result has 10.7 percent of original size [2021-11-09 08:48:16,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 23 case distinctions, treesize of input 281 treesize of output 251 [2021-11-09 08:48:16,058 INFO L354 Elim1Store]: treesize reduction 244, result has 14.4 percent of original size [2021-11-09 08:48:16,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 233 treesize of output 246 [2021-11-09 08:48:16,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:48:16,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:48:16,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:48:16,836 INFO L354 Elim1Store]: treesize reduction 96, result has 1.0 percent of original size [2021-11-09 08:48:16,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 3 disjoint index pairs (out of 28 index pairs), introduced 11 new quantified variables, introduced 28 case distinctions, treesize of input 1208 treesize of output 745 [2021-11-09 08:48:16,849 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:48:17,439 INFO L354 Elim1Store]: treesize reduction 844, result has 7.8 percent of original size [2021-11-09 08:48:17,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 13 new quantified variables, introduced 38 case distinctions, treesize of input 1236 treesize of output 446 [2021-11-09 08:48:17,585 INFO L354 Elim1Store]: treesize reduction 1160, result has 6.0 percent of original size [2021-11-09 08:48:17,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 1193 treesize of output 1153 [2021-11-09 08:48:17,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:48:17,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:48:17,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:48:17,609 INFO L354 Elim1Store]: treesize reduction 288, result has 0.3 percent of original size [2021-11-09 08:48:17,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 3 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 1103 treesize of output 1064 [2021-11-09 08:48:17,617 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:48:17,734 INFO L354 Elim1Store]: treesize reduction 896, result has 11.9 percent of original size [2021-11-09 08:48:17,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 3 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 36 case distinctions, treesize of input 590 treesize of output 506 [2021-11-09 08:48:17,763 INFO L354 Elim1Store]: treesize reduction 397, result has 5.7 percent of original size [2021-11-09 08:48:17,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 482 treesize of output 434 [2021-11-09 08:48:23,950 INFO L354 Elim1Store]: treesize reduction 619, result has 8.0 percent of original size [2021-11-09 08:48:23,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 13 select indices, 13 select index equivalence classes, 1 disjoint index pairs (out of 78 index pairs), introduced 22 new quantified variables, introduced 78 case distinctions, treesize of input 513 treesize of output 241 [2021-11-09 08:48:24,160 INFO L354 Elim1Store]: treesize reduction 599, result has 1.6 percent of original size [2021-11-09 08:48:24,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 13 select indices, 13 select index equivalence classes, 1 disjoint index pairs (out of 78 index pairs), introduced 17 new quantified variables, introduced 78 case distinctions, treesize of input 180 treesize of output 129 [2021-11-09 08:48:24,297 INFO L354 Elim1Store]: treesize reduction 24, result has 35.1 percent of original size [2021-11-09 08:48:24,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 31 [2021-11-09 08:48:24,310 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 8 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:48:24,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709644367] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:48:24,311 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:48:24,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 30 [2021-11-09 08:48:24,311 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663205012] [2021-11-09 08:48:24,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-09 08:48:24,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:48:24,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-09 08:48:24,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=776, Unknown=0, NotChecked=0, Total=870 [2021-11-09 08:48:24,313 INFO L87 Difference]: Start difference. First operand 98 states and 101 transitions. Second operand has 30 states, 30 states have (on average 3.2333333333333334) internal successors, (97), 30 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) [2021-11-09 08:48:26,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:48:26,707 INFO L93 Difference]: Finished difference Result 151 states and 154 transitions. [2021-11-09 08:48:26,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-09 08:48:26,707 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.2333333333333334) internal successors, (97), 30 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 52 [2021-11-09 08:48:26,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:48:26,708 INFO L225 Difference]: With dead ends: 151 [2021-11-09 08:48:26,708 INFO L226 Difference]: Without dead ends: 135 [2021-11-09 08:48:26,709 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=157, Invalid=1175, Unknown=0, NotChecked=0, Total=1332 [2021-11-09 08:48:26,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-11-09 08:48:26,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 127. [2021-11-09 08:48:26,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 125 states have (on average 1.04) internal successors, (130), 126 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:48:26,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 130 transitions. [2021-11-09 08:48:26,729 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 130 transitions. Word has length 52 [2021-11-09 08:48:26,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:48:26,729 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 130 transitions. [2021-11-09 08:48:26,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.2333333333333334) internal successors, (97), 30 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) [2021-11-09 08:48:26,730 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 130 transitions. [2021-11-09 08:48:26,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-09 08:48:26,730 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:48:26,730 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:48:26,769 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e879c0e6-a86a-4b59-b907-11787051e93f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-09 08:48:26,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e879c0e6-a86a-4b59-b907-11787051e93f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-11-09 08:48:26,931 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-09 08:48:26,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:48:26,932 INFO L85 PathProgramCache]: Analyzing trace with hash -1892522115, now seen corresponding path program 8 times [2021-11-09 08:48:26,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:48:26,932 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985952706] [2021-11-09 08:48:26,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:48:26,932 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:48:27,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:48:28,117 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 2 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:48:28,117 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:48:28,117 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985952706] [2021-11-09 08:48:28,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985952706] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:48:28,117 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576956140] [2021-11-09 08:48:28,117 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 08:48:28,118 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:48:28,118 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e879c0e6-a86a-4b59-b907-11787051e93f/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:48:28,118 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e879c0e6-a86a-4b59-b907-11787051e93f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:48:28,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e879c0e6-a86a-4b59-b907-11787051e93f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-09 08:48:31,380 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 08:48:31,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:48:31,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 77 conjunts are in the unsatisfiable core [2021-11-09 08:48:31,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:48:31,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-11-09 08:48:31,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:48:31,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:48:31,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:48:31,473 INFO L354 Elim1Store]: treesize reduction 68, result has 18.1 percent of original size [2021-11-09 08:48:31,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 185 treesize of output 132 [2021-11-09 08:48:31,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:48:31,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:48:31,497 INFO L354 Elim1Store]: treesize reduction 68, result has 18.1 percent of original size [2021-11-09 08:48:31,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 104 treesize of output 51 [2021-11-09 08:48:31,512 INFO L354 Elim1Store]: treesize reduction 26, result has 35.0 percent of original size [2021-11-09 08:48:31,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 64 treesize of output 68 [2021-11-09 08:48:31,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:48:31,834 INFO L354 Elim1Store]: treesize reduction 184, result has 13.6 percent of original size [2021-11-09 08:48:31,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 323 treesize of output 175 [2021-11-09 08:48:31,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:48:31,886 INFO L354 Elim1Store]: treesize reduction 272, result has 14.2 percent of original size [2021-11-09 08:48:31,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 5 case distinctions, treesize of input 243 treesize of output 144 [2021-11-09 08:48:31,912 INFO L354 Elim1Store]: treesize reduction 108, result has 20.0 percent of original size [2021-11-09 08:48:31,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 138 treesize of output 145 [2021-11-09 08:48:32,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:48:32,382 INFO L354 Elim1Store]: treesize reduction 316, result has 12.0 percent of original size [2021-11-09 08:48:32,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 477 treesize of output 214 [2021-11-09 08:48:32,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:48:32,504 INFO L354 Elim1Store]: treesize reduction 528, result has 11.9 percent of original size [2021-11-09 08:48:32,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 12 case distinctions, treesize of input 312 treesize of output 203 [2021-11-09 08:48:32,543 INFO L354 Elim1Store]: treesize reduction 190, result has 15.9 percent of original size [2021-11-09 08:48:32,543 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 9 case distinctions, treesize of input 191 treesize of output 201 [2021-11-09 08:48:33,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:48:33,194 INFO L354 Elim1Store]: treesize reduction 464, result has 10.9 percent of original size [2021-11-09 08:48:33,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 23 case distinctions, treesize of input 450 treesize of output 257 [2021-11-09 08:48:33,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:48:33,333 INFO L354 Elim1Store]: treesize reduction 1040, result has 10.4 percent of original size [2021-11-09 08:48:33,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 23 case distinctions, treesize of input 535 treesize of output 368 [2021-11-09 08:48:33,389 INFO L354 Elim1Store]: treesize reduction 476, result has 12.0 percent of original size [2021-11-09 08:48:33,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 350 treesize of output 363 [2021-11-09 08:48:34,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:48:34,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:48:34,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:48:34,186 INFO L354 Elim1Store]: treesize reduction 96, result has 1.0 percent of original size [2021-11-09 08:48:34,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 3 disjoint index pairs (out of 28 index pairs), introduced 12 new quantified variables, introduced 28 case distinctions, treesize of input 2412 treesize of output 712 [2021-11-09 08:48:34,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:48:34,633 INFO L354 Elim1Store]: treesize reduction 844, result has 7.8 percent of original size [2021-11-09 08:48:34,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 13 new quantified variables, introduced 38 case distinctions, treesize of input 1155 treesize of output 413 [2021-11-09 08:48:34,642 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 1104 treesize of output 1080 [2021-11-09 08:48:34,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:48:34,652 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:48:34,774 INFO L354 Elim1Store]: treesize reduction 1024, result has 12.3 percent of original size [2021-11-09 08:48:34,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 3 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 37 case distinctions, treesize of input 573 treesize of output 506 [2021-11-09 08:48:34,801 INFO L354 Elim1Store]: treesize reduction 397, result has 5.7 percent of original size [2021-11-09 08:48:34,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 459 treesize of output 411 [2021-11-09 08:48:41,309 INFO L354 Elim1Store]: treesize reduction 772, result has 7.3 percent of original size [2021-11-09 08:48:41,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 14 select indices, 14 select index equivalence classes, 1 disjoint index pairs (out of 91 index pairs), introduced 25 new quantified variables, introduced 91 case distinctions, treesize of input 653 treesize of output 266 [2021-11-09 08:48:41,516 INFO L354 Elim1Store]: treesize reduction 744, result has 1.7 percent of original size [2021-11-09 08:48:41,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 14 select indices, 14 select index equivalence classes, 1 disjoint index pairs (out of 91 index pairs), introduced 19 new quantified variables, introduced 91 case distinctions, treesize of input 176 treesize of output 131 [2021-11-09 08:48:41,549 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 15 treesize of output 7 [2021-11-09 08:48:41,554 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:48:41,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576956140] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:48:41,554 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:48:41,555 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14] total 27 [2021-11-09 08:48:41,555 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977543716] [2021-11-09 08:48:41,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-09 08:48:41,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:48:41,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-09 08:48:41,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=626, Unknown=0, NotChecked=0, Total=702 [2021-11-09 08:48:41,556 INFO L87 Difference]: Start difference. First operand 127 states and 130 transitions. Second operand has 27 states, 27 states have (on average 3.925925925925926) internal successors, (106), 27 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:48:46,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:48:46,102 INFO L93 Difference]: Finished difference Result 135 states and 137 transitions. [2021-11-09 08:48:46,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-09 08:48:46,103 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.925925925925926) internal successors, (106), 27 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 56 [2021-11-09 08:48:46,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:48:46,103 INFO L225 Difference]: With dead ends: 135 [2021-11-09 08:48:46,103 INFO L226 Difference]: Without dead ends: 98 [2021-11-09 08:48:46,104 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=89, Invalid=723, Unknown=0, NotChecked=0, Total=812 [2021-11-09 08:48:46,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-11-09 08:48:46,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2021-11-09 08:48:46,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 96 states have (on average 1.0416666666666667) internal successors, (100), 97 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) [2021-11-09 08:48:46,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 100 transitions. [2021-11-09 08:48:46,117 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 100 transitions. Word has length 56 [2021-11-09 08:48:46,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:48:46,117 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 100 transitions. [2021-11-09 08:48:46,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.925925925925926) internal successors, (106), 27 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:48:46,117 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 100 transitions. [2021-11-09 08:48:46,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-09 08:48:46,117 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:48:46,118 INFO L513 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:48:46,153 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e879c0e6-a86a-4b59-b907-11787051e93f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2021-11-09 08:48:46,328 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e879c0e6-a86a-4b59-b907-11787051e93f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:48:46,328 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-09 08:48:46,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:48:46,329 INFO L85 PathProgramCache]: Analyzing trace with hash -947778202, now seen corresponding path program 8 times [2021-11-09 08:48:46,329 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:48:46,329 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391534794] [2021-11-09 08:48:46,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:48:46,329 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:48:46,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:48:47,213 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:48:47,213 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:48:47,213 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391534794] [2021-11-09 08:48:47,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391534794] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:48:47,213 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646271897] [2021-11-09 08:48:47,213 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 08:48:47,213 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:48:47,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e879c0e6-a86a-4b59-b907-11787051e93f/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:48:47,214 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e879c0e6-a86a-4b59-b907-11787051e93f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:48:47,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e879c0e6-a86a-4b59-b907-11787051e93f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-09 08:48:50,118 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 08:48:50,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:48:50,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 93 conjunts are in the unsatisfiable core [2021-11-09 08:48:50,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:48:50,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-11-09 08:48:50,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:48:50,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:48:50,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:48:50,190 INFO L354 Elim1Store]: treesize reduction 68, result has 18.1 percent of original size [2021-11-09 08:48:50,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 185 treesize of output 132 [2021-11-09 08:48:50,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:48:50,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:48:50,208 INFO L354 Elim1Store]: treesize reduction 68, result has 18.1 percent of original size [2021-11-09 08:48:50,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 104 treesize of output 51 [2021-11-09 08:48:50,220 INFO L354 Elim1Store]: treesize reduction 26, result has 35.0 percent of original size [2021-11-09 08:48:50,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 64 treesize of output 68 [2021-11-09 08:48:50,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:48:50,465 INFO L354 Elim1Store]: treesize reduction 184, result has 13.6 percent of original size [2021-11-09 08:48:50,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 323 treesize of output 175 [2021-11-09 08:48:50,469 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:48:50,502 INFO L354 Elim1Store]: treesize reduction 224, result has 14.2 percent of original size [2021-11-09 08:48:50,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 5 case distinctions, treesize of input 142 treesize of output 112 [2021-11-09 08:48:50,522 INFO L354 Elim1Store]: treesize reduction 68, result has 21.8 percent of original size [2021-11-09 08:48:50,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 106 treesize of output 113 [2021-11-09 08:48:50,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:48:50,883 INFO L354 Elim1Store]: treesize reduction 316, result has 12.0 percent of original size [2021-11-09 08:48:50,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 477 treesize of output 214 [2021-11-09 08:48:50,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:48:50,959 INFO L354 Elim1Store]: treesize reduction 584, result has 11.9 percent of original size [2021-11-09 08:48:50,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 12 case distinctions, treesize of input 373 treesize of output 240 [2021-11-09 08:48:50,990 INFO L354 Elim1Store]: treesize reduction 254, result has 14.8 percent of original size [2021-11-09 08:48:50,991 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 9 case distinctions, treesize of input 228 treesize of output 238 [2021-11-09 08:48:51,408 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 [2021-11-09 08:48:51,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:48:51,660 INFO L354 Elim1Store]: treesize reduction 464, result has 10.9 percent of original size [2021-11-09 08:48:51,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 9 new quantified variables, introduced 23 case distinctions, treesize of input 663 treesize of output 257 [2021-11-09 08:48:51,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:48:51,821 INFO L354 Elim1Store]: treesize reduction 888, result has 10.6 percent of original size [2021-11-09 08:48:51,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 23 case distinctions, treesize of input 346 treesize of output 304 [2021-11-09 08:48:51,881 INFO L354 Elim1Store]: treesize reduction 300, result has 14.0 percent of original size [2021-11-09 08:48:51,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 286 treesize of output 299 [2021-11-09 08:48:52,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:48:52,781 INFO L354 Elim1Store]: treesize reduction 622, result has 11.0 percent of original size [2021-11-09 08:48:52,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 12 new quantified variables, introduced 38 case distinctions, treesize of input 864 treesize of output 321 [2021-11-09 08:48:52,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:48:53,026 INFO L354 Elim1Store]: treesize reduction 1430, result has 9.9 percent of original size [2021-11-09 08:48:53,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 38 case distinctions, treesize of input 593 treesize of output 551 [2021-11-09 08:48:53,034 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 527 treesize of output 467 [2021-11-09 08:48:53,123 INFO L354 Elim1Store]: treesize reduction 450, result has 21.9 percent of original size [2021-11-09 08:48:53,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 20 case distinctions, treesize of input 464 treesize of output 536 [2021-11-09 08:48:53,151 INFO L354 Elim1Store]: treesize reduction 90, result has 29.1 percent of original size [2021-11-09 08:48:53,151 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 2 case distinctions, treesize of input 506 treesize of output 515 [2021-11-09 08:48:54,177 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:48:55,872 INFO L354 Elim1Store]: treesize reduction 486, result has 13.7 percent of original size [2021-11-09 08:48:55,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 1 disjoint index pairs (out of 45 index pairs), introduced 15 new quantified variables, introduced 55 case distinctions, treesize of input 3209 treesize of output 840 [2021-11-09 08:48:55,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:48:55,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:48:58,428 INFO L354 Elim1Store]: treesize reduction 2402, result has 6.9 percent of original size [2021-11-09 08:48:58,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 10 select indices, 10 select index equivalence classes, 1 disjoint index pairs (out of 45 index pairs), introduced 18 new quantified variables, introduced 69 case distinctions, treesize of input 3198 treesize of output 897 [2021-11-09 08:48:59,161 INFO L354 Elim1Store]: treesize reduction 6684, result has 8.0 percent of original size [2021-11-09 08:48:59,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 11 case distinctions, treesize of input 4477 treesize of output 4534 [2021-11-09 08:48:59,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:48:59,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:48:59,236 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:49:01,491 INFO L354 Elim1Store]: treesize reduction 18799, result has 4.9 percent of original size [2021-11-09 08:49:01,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 10 select indices, 10 select index equivalence classes, 3 disjoint index pairs (out of 45 index pairs), introduced 14 new quantified variables, introduced 94 case distinctions, treesize of input 3993 treesize of output 3918 [2021-11-09 08:49:01,633 INFO L354 Elim1Store]: treesize reduction 596, result has 11.4 percent of original size [2021-11-09 08:49:01,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 4098 treesize of output 4076 [2021-11-09 08:49:01,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:49:01,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:49:01,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 317 treesize of output 173 [2021-11-09 08:49:02,022 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:49:02,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:49:02,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 339 treesize of output 197 [2021-11-09 08:49:02,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:49:02,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:49:02,124 INFO L354 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2021-11-09 08:49:02,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 368 treesize of output 200 [2021-11-09 08:49:02,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:49:02,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:49:02,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:49:02,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:49:02,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:49:02,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:49:02,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:49:02,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:49:02,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:49:02,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:49:02,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:49:02,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:49:02,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:49:02,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:49:02,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:49:02,338 INFO L354 Elim1Store]: treesize reduction 27, result has 27.0 percent of original size [2021-11-09 08:49:02,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 14 select indices, 14 select index equivalence classes, 24 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 4 case distinctions, treesize of input 775 treesize of output 457 [2021-11-09 08:49:02,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:49:02,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:49:02,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:49:02,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:49:02,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:49:02,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:49:02,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:49:02,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:49:02,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:49:02,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:49:02,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:49:02,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:49:02,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:49:02,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:49:02,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:49:02,685 INFO L354 Elim1Store]: treesize reduction 19, result has 34.5 percent of original size [2021-11-09 08:49:02,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 14 select indices, 14 select index equivalence classes, 23 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 3 case distinctions, treesize of input 734 treesize of output 400 [2021-11-09 08:49:02,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:49:02,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:49:02,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:49:02,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:49:02,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:49:02,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:49:02,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:49:02,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:49:02,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:49:02,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:49:02,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:49:02,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:49:02,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:49:02,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:49:02,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:49:02,808 INFO L354 Elim1Store]: treesize reduction 9, result has 52.6 percent of original size [2021-11-09 08:49:02,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 13 select indices, 13 select index equivalence classes, 23 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 2 case distinctions, treesize of input 521 treesize of output 249 [2021-11-09 08:49:03,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:49:03,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:49:03,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:49:03,942 INFO L354 Elim1Store]: treesize reduction 329, result has 2.4 percent of original size [2021-11-09 08:49:03,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 13 select indices, 13 select index equivalence classes, 3 disjoint index pairs (out of 78 index pairs), introduced 19 new quantified variables, introduced 78 case distinctions, treesize of input 1226 treesize of output 360 [2021-11-09 08:52:31,574 INFO L354 Elim1Store]: treesize reduction 915, result has 7.5 percent of original size [2021-11-09 08:52:31,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 15 select indices, 15 select index equivalence classes, 1 disjoint index pairs (out of 105 index pairs), introduced 24 new quantified variables, introduced 105 case distinctions, treesize of input 810 treesize of output 338 [2021-11-09 08:52:31,843 INFO L354 Elim1Store]: treesize reduction 851, result has 1.2 percent of original size [2021-11-09 08:52:31,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 15 select indices, 15 select index equivalence classes, 1 disjoint index pairs (out of 105 index pairs), introduced 20 new quantified variables, introduced 105 case distinctions, treesize of input 274 treesize of output 198 [2021-11-09 08:52:32,286 INFO L354 Elim1Store]: treesize reduction 72, result has 11.1 percent of original size [2021-11-09 08:52:32,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 62 treesize of output 46 [2021-11-09 08:52:32,296 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:52:32,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646271897] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:52:32,296 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:52:32,296 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 30 [2021-11-09 08:52:32,296 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525919880] [2021-11-09 08:52:32,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-09 08:52:32,297 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:52:32,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-09 08:52:32,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=774, Unknown=2, NotChecked=0, Total=870 [2021-11-09 08:52:32,299 INFO L87 Difference]: Start difference. First operand 98 states and 100 transitions. Second operand has 30 states, 30 states have (on average 3.566666666666667) internal successors, (107), 30 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) [2021-11-09 08:52:56,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:52:56,150 INFO L93 Difference]: Finished difference Result 116 states and 120 transitions. [2021-11-09 08:52:56,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-09 08:52:56,151 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.566666666666667) internal successors, (107), 30 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 56 [2021-11-09 08:52:56,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:52:56,153 INFO L225 Difference]: With dead ends: 116 [2021-11-09 08:52:56,153 INFO L226 Difference]: Without dead ends: 114 [2021-11-09 08:52:56,154 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 11.5s TimeCoverageRelationStatistics Valid=189, Invalid=1615, Unknown=2, NotChecked=0, Total=1806 [2021-11-09 08:52:56,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-11-09 08:52:56,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 104. [2021-11-09 08:52:56,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 102 states have (on average 1.0490196078431373) internal successors, (107), 103 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) [2021-11-09 08:52:56,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 107 transitions. [2021-11-09 08:52:56,175 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 107 transitions. Word has length 56 [2021-11-09 08:52:56,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:52:56,175 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 107 transitions. [2021-11-09 08:52:56,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.566666666666667) internal successors, (107), 30 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) [2021-11-09 08:52:56,176 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 107 transitions. [2021-11-09 08:52:56,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-09 08:52:56,177 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:52:56,177 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:52:56,214 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e879c0e6-a86a-4b59-b907-11787051e93f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-09 08:52:56,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e879c0e6-a86a-4b59-b907-11787051e93f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:52:56,378 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-09 08:52:56,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:52:56,378 INFO L85 PathProgramCache]: Analyzing trace with hash 33202389, now seen corresponding path program 9 times [2021-11-09 08:52:56,378 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:52:56,378 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850084823] [2021-11-09 08:52:56,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:52:56,378 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:52:56,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:52:57,484 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 10 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:52:57,485 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:52:57,485 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850084823] [2021-11-09 08:52:57,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850084823] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:52:57,485 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325459344] [2021-11-09 08:52:57,485 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 08:52:57,485 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:52:57,485 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e879c0e6-a86a-4b59-b907-11787051e93f/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:52:57,486 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e879c0e6-a86a-4b59-b907-11787051e93f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:52:57,489 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e879c0e6-a86a-4b59-b907-11787051e93f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-09 08:53:03,024 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-09 08:53:03,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:53:03,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 109 conjunts are in the unsatisfiable core [2021-11-09 08:53:03,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:53:03,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-11-09 08:53:03,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:53:03,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:53:03,133 INFO L354 Elim1Store]: treesize reduction 68, result has 18.1 percent of original size [2021-11-09 08:53:03,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 185 treesize of output 132 [2021-11-09 08:53:03,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:53:03,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:53:03,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:53:03,156 INFO L354 Elim1Store]: treesize reduction 60, result has 20.0 percent of original size [2021-11-09 08:53:03,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 72 treesize of output 48 [2021-11-09 08:53:03,172 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-09 08:53:03,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 48 treesize of output 52 [2021-11-09 08:53:03,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:53:03,463 INFO L354 Elim1Store]: treesize reduction 184, result has 13.6 percent of original size [2021-11-09 08:53:03,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 323 treesize of output 175 [2021-11-09 08:53:03,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:53:03,510 INFO L354 Elim1Store]: treesize reduction 224, result has 14.2 percent of original size [2021-11-09 08:53:03,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 5 case distinctions, treesize of input 142 treesize of output 112 [2021-11-09 08:53:03,533 INFO L354 Elim1Store]: treesize reduction 68, result has 21.8 percent of original size [2021-11-09 08:53:03,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 106 treesize of output 113 [2021-11-09 08:53:03,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:53:03,978 INFO L354 Elim1Store]: treesize reduction 380, result has 11.8 percent of original size [2021-11-09 08:53:03,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 12 case distinctions, treesize of input 272 treesize of output 231 [2021-11-09 08:53:03,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:53:04,064 INFO L354 Elim1Store]: treesize reduction 316, result has 12.0 percent of original size [2021-11-09 08:53:04,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 12 case distinctions, treesize of input 191 treesize of output 133 [2021-11-09 08:53:04,121 INFO L354 Elim1Store]: treesize reduction 134, result has 17.3 percent of original size [2021-11-09 08:53:04,122 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 9 case distinctions, treesize of input 156 treesize of output 166 [2021-11-09 08:53:04,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:53:04,783 INFO L354 Elim1Store]: treesize reduction 464, result has 10.9 percent of original size [2021-11-09 08:53:04,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 23 case distinctions, treesize of input 330 treesize of output 257 [2021-11-09 08:53:04,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:53:04,915 INFO L354 Elim1Store]: treesize reduction 744, result has 10.7 percent of original size [2021-11-09 08:53:04,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 23 case distinctions, treesize of input 274 treesize of output 256 [2021-11-09 08:53:04,966 INFO L354 Elim1Store]: treesize reduction 244, result has 14.4 percent of original size [2021-11-09 08:53:04,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 238 treesize of output 251 [2021-11-09 08:53:05,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:53:05,912 INFO L354 Elim1Store]: treesize reduction 948, result has 9.8 percent of original size [2021-11-09 08:53:05,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 38 case distinctions, treesize of input 400 treesize of output 371 [2021-11-09 08:53:05,922 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:53:06,130 INFO L354 Elim1Store]: treesize reduction 628, result has 10.2 percent of original size [2021-11-09 08:53:06,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 11 new quantified variables, introduced 38 case distinctions, treesize of input 319 treesize of output 215 [2021-11-09 08:53:06,203 INFO L354 Elim1Store]: treesize reduction 410, result has 12.4 percent of original size [2021-11-09 08:53:06,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 20 case distinctions, treesize of input 328 treesize of output 344 [2021-11-09 08:53:07,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:53:07,177 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:53:08,363 INFO L354 Elim1Store]: treesize reduction 2206, result has 4.0 percent of original size [2021-11-09 08:53:08,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 3 disjoint index pairs (out of 45 index pairs), introduced 14 new quantified variables, introduced 58 case distinctions, treesize of input 611 treesize of output 422 [2021-11-09 08:53:08,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:53:08,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:53:08,623 INFO L354 Elim1Store]: treesize reduction 868, result has 14.7 percent of original size [2021-11-09 08:53:08,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 3 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 56 case distinctions, treesize of input 499 treesize of output 502 [2021-11-09 08:53:08,669 INFO L354 Elim1Store]: treesize reduction 381, result has 1.0 percent of original size [2021-11-09 08:53:08,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 461 treesize of output 415 [2021-11-09 08:53:08,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 402 treesize of output 371 [2021-11-09 08:53:08,696 INFO L354 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2021-11-09 08:53:08,696 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 360 treesize of output 359 [2021-11-09 08:53:43,238 INFO L354 Elim1Store]: treesize reduction 972, result has 5.9 percent of original size [2021-11-09 08:53:43,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 1 disjoint index pairs (out of 120 index pairs), introduced 27 new quantified variables, introduced 120 case distinctions, treesize of input 764 treesize of output 345 [2021-11-09 08:53:43,622 INFO L354 Elim1Store]: treesize reduction 936, result has 1.4 percent of original size [2021-11-09 08:53:43,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 1 disjoint index pairs (out of 120 index pairs), introduced 21 new quantified variables, introduced 120 case distinctions, treesize of input 265 treesize of output 168 [2021-11-09 08:53:44,173 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 10 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:53:44,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325459344] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:53:44,173 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:53:44,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 25] total 39 [2021-11-09 08:53:44,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208231216] [2021-11-09 08:53:44,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-11-09 08:53:44,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:53:44,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-11-09 08:53:44,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1352, Unknown=8, NotChecked=0, Total=1482 [2021-11-09 08:53:44,175 INFO L87 Difference]: Start difference. First operand 104 states and 107 transitions. Second operand has 39 states, 39 states have (on average 3.0256410256410255) internal successors, (118), 39 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) [2021-11-09 08:54:53,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:54:53,101 INFO L93 Difference]: Finished difference Result 130 states and 134 transitions. [2021-11-09 08:54:53,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-09 08:54:53,101 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.0256410256410255) internal successors, (118), 39 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 62 [2021-11-09 08:54:53,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:54:53,102 INFO L225 Difference]: With dead ends: 130 [2021-11-09 08:54:53,103 INFO L226 Difference]: Without dead ends: 114 [2021-11-09 08:54:53,104 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 24.0s TimeCoverageRelationStatistics Valid=147, Invalid=1567, Unknown=8, NotChecked=0, Total=1722 [2021-11-09 08:54:53,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-11-09 08:54:53,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 110. [2021-11-09 08:54:53,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 108 states have (on average 1.0462962962962963) internal successors, (113), 109 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) [2021-11-09 08:54:53,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 113 transitions. [2021-11-09 08:54:53,125 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 113 transitions. Word has length 62 [2021-11-09 08:54:53,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:54:53,125 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 113 transitions. [2021-11-09 08:54:53,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.0256410256410255) internal successors, (118), 39 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) [2021-11-09 08:54:53,125 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 113 transitions. [2021-11-09 08:54:53,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-09 08:54:53,126 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:54:53,126 INFO L513 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:54:53,177 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e879c0e6-a86a-4b59-b907-11787051e93f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-09 08:54:53,348 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e879c0e6-a86a-4b59-b907-11787051e93f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-09 08:54:53,348 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-09 08:54:53,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:54:53,348 INFO L85 PathProgramCache]: Analyzing trace with hash 947839823, now seen corresponding path program 9 times [2021-11-09 08:54:53,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:54:53,349 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883674397] [2021-11-09 08:54:53,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:54:53,349 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:54:53,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:54:54,690 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:54:54,690 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:54:54,690 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883674397] [2021-11-09 08:54:54,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883674397] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:54:54,690 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323073268] [2021-11-09 08:54:54,690 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 08:54:54,690 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:54:54,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e879c0e6-a86a-4b59-b907-11787051e93f/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:54:54,691 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e879c0e6-a86a-4b59-b907-11787051e93f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:54:54,693 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e879c0e6-a86a-4b59-b907-11787051e93f/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-09 08:55:01,451 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-11-09 08:55:01,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:55:01,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 119 conjunts are in the unsatisfiable core [2021-11-09 08:55:01,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:55:01,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-11-09 08:55:01,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:55:01,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:55:01,566 INFO L354 Elim1Store]: treesize reduction 68, result has 18.1 percent of original size [2021-11-09 08:55:01,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 185 treesize of output 132 [2021-11-09 08:55:01,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:55:01,570 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:55:01,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:55:01,586 INFO L354 Elim1Store]: treesize reduction 60, result has 20.0 percent of original size [2021-11-09 08:55:01,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 72 treesize of output 48 [2021-11-09 08:55:01,598 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-09 08:55:01,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 48 treesize of output 52 [2021-11-09 08:55:01,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:55:01,850 INFO L354 Elim1Store]: treesize reduction 184, result has 13.6 percent of original size [2021-11-09 08:55:01,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 323 treesize of output 175 [2021-11-09 08:55:01,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:55:01,892 INFO L354 Elim1Store]: treesize reduction 224, result has 14.2 percent of original size [2021-11-09 08:55:01,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 5 case distinctions, treesize of input 142 treesize of output 112 [2021-11-09 08:55:01,914 INFO L354 Elim1Store]: treesize reduction 68, result has 21.8 percent of original size [2021-11-09 08:55:01,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 106 treesize of output 113