./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test5-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27ca112-6ec9-4ea1-b313-480c06bc4b5f/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27ca112-6ec9-4ea1-b313-480c06bc4b5f/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27ca112-6ec9-4ea1-b313-480c06bc4b5f/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27ca112-6ec9-4ea1-b313-480c06bc4b5f/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test5-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27ca112-6ec9-4ea1-b313-480c06bc4b5f/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27ca112-6ec9-4ea1-b313-480c06bc4b5f/bin/uautomizer-DrprNOufMa --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 ad1bbae792ec9c8e2e546dc04f3672720af98ce14b9bd37d0d7647e79ce45565 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 17:25:59,344 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 17:25:59,346 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 17:25:59,368 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 17:25:59,369 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 17:25:59,370 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 17:25:59,371 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 17:25:59,373 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 17:25:59,375 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 17:25:59,376 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 17:25:59,377 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 17:25:59,378 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 17:25:59,378 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 17:25:59,379 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 17:25:59,380 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 17:25:59,381 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 17:25:59,382 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 17:25:59,383 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 17:25:59,384 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 17:25:59,386 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 17:25:59,388 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 17:25:59,390 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 17:25:59,392 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 17:25:59,392 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 17:25:59,396 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 17:25:59,397 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 17:25:59,397 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 17:25:59,398 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 17:25:59,399 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 17:25:59,400 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 17:25:59,401 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 17:25:59,401 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 17:25:59,402 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 17:25:59,403 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 17:25:59,404 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 17:25:59,404 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 17:25:59,405 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 17:25:59,405 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 17:25:59,406 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 17:25:59,407 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 17:25:59,407 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 17:25:59,408 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27ca112-6ec9-4ea1-b313-480c06bc4b5f/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 17:25:59,429 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 17:25:59,429 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 17:25:59,430 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 17:25:59,430 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 17:25:59,430 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 17:25:59,430 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 17:25:59,431 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 17:25:59,431 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 17:25:59,431 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 17:25:59,431 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 17:25:59,432 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 17:25:59,432 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 17:25:59,432 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 17:25:59,432 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 17:25:59,432 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 17:25:59,432 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 17:25:59,432 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 17:25:59,432 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 17:25:59,433 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 17:25:59,433 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 17:25:59,433 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 17:25:59,433 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 17:25:59,433 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 17:25:59,433 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 17:25:59,433 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 17:25:59,433 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 17:25:59,434 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 17:25:59,434 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 17:25:59,434 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 17:25:59,434 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 17:25:59,434 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 17:25:59,434 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 17:25:59,434 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 17:25:59,434 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 17:25:59,435 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_b27ca112-6ec9-4ea1-b313-480c06bc4b5f/bin/uautomizer-DrprNOufMa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27ca112-6ec9-4ea1-b313-480c06bc4b5f/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ad1bbae792ec9c8e2e546dc04f3672720af98ce14b9bd37d0d7647e79ce45565 [2021-12-06 17:25:59,621 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 17:25:59,636 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 17:25:59,637 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 17:25:59,638 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 17:25:59,639 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 17:25:59,639 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27ca112-6ec9-4ea1-b313-480c06bc4b5f/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test5-2.i [2021-12-06 17:25:59,689 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27ca112-6ec9-4ea1-b313-480c06bc4b5f/bin/uautomizer-DrprNOufMa/data/4e710751e/ed14fc77bd5548efa15e26c5eceb05c3/FLAG993945ccc [2021-12-06 17:26:00,155 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 17:26:00,155 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27ca112-6ec9-4ea1-b313-480c06bc4b5f/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test5-2.i [2021-12-06 17:26:00,168 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27ca112-6ec9-4ea1-b313-480c06bc4b5f/bin/uautomizer-DrprNOufMa/data/4e710751e/ed14fc77bd5548efa15e26c5eceb05c3/FLAG993945ccc [2021-12-06 17:26:00,178 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27ca112-6ec9-4ea1-b313-480c06bc4b5f/bin/uautomizer-DrprNOufMa/data/4e710751e/ed14fc77bd5548efa15e26c5eceb05c3 [2021-12-06 17:26:00,180 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 17:26:00,181 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 17:26:00,183 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 17:26:00,183 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 17:26:00,186 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 17:26:00,186 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 05:26:00" (1/1) ... [2021-12-06 17:26:00,187 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@387291bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:26:00, skipping insertion in model container [2021-12-06 17:26:00,187 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 05:26:00" (1/1) ... [2021-12-06 17:26:00,192 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 17:26:00,230 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 17:26:00,490 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27ca112-6ec9-4ea1-b313-480c06bc4b5f/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test5-2.i[33021,33034] [2021-12-06 17:26:00,578 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27ca112-6ec9-4ea1-b313-480c06bc4b5f/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test5-2.i[49681,49694] [2021-12-06 17:26:00,589 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 17:26:00,596 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 17:26:00,619 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27ca112-6ec9-4ea1-b313-480c06bc4b5f/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test5-2.i[33021,33034] [2021-12-06 17:26:00,668 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27ca112-6ec9-4ea1-b313-480c06bc4b5f/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test5-2.i[49681,49694] [2021-12-06 17:26:00,677 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 17:26:00,704 INFO L208 MainTranslator]: Completed translation [2021-12-06 17:26:00,705 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:26:00 WrapperNode [2021-12-06 17:26:00,705 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 17:26:00,705 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 17:26:00,706 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 17:26:00,706 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 17:26:00,712 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:26:00" (1/1) ... [2021-12-06 17:26:00,751 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:26:00" (1/1) ... [2021-12-06 17:26:00,819 INFO L137 Inliner]: procedures = 177, calls = 439, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1557 [2021-12-06 17:26:00,819 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 17:26:00,820 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 17:26:00,820 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 17:26:00,820 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 17:26:00,829 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:26:00" (1/1) ... [2021-12-06 17:26:00,829 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:26:00" (1/1) ... [2021-12-06 17:26:00,842 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:26:00" (1/1) ... [2021-12-06 17:26:00,842 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:26:00" (1/1) ... [2021-12-06 17:26:00,888 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:26:00" (1/1) ... [2021-12-06 17:26:00,900 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:26:00" (1/1) ... [2021-12-06 17:26:00,904 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:26:00" (1/1) ... [2021-12-06 17:26:00,915 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 17:26:00,915 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 17:26:00,915 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 17:26:00,915 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 17:26:00,916 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:26:00" (1/1) ... [2021-12-06 17:26:00,923 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 17:26:00,933 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27ca112-6ec9-4ea1-b313-480c06bc4b5f/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:26:00,945 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27ca112-6ec9-4ea1-b313-480c06bc4b5f/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 17:26:00,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27ca112-6ec9-4ea1-b313-480c06bc4b5f/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 17:26:00,980 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-06 17:26:00,980 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-06 17:26:00,980 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-06 17:26:00,980 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-06 17:26:00,980 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-12-06 17:26:00,980 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-12-06 17:26:00,980 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-06 17:26:00,981 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 17:26:00,981 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-06 17:26:00,981 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-06 17:26:00,981 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-12-06 17:26:00,981 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-06 17:26:00,981 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-06 17:26:00,981 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 17:26:00,981 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 17:26:00,981 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 17:26:01,147 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 17:26:01,148 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 17:26:02,044 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 17:26:02,053 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 17:26:02,053 INFO L301 CfgBuilder]: Removed 92 assume(true) statements. [2021-12-06 17:26:02,055 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 05:26:02 BoogieIcfgContainer [2021-12-06 17:26:02,055 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 17:26:02,057 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 17:26:02,057 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 17:26:02,059 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 17:26:02,059 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 05:26:00" (1/3) ... [2021-12-06 17:26:02,060 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d7e89f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 05:26:02, skipping insertion in model container [2021-12-06 17:26:02,060 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:26:00" (2/3) ... [2021-12-06 17:26:02,060 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d7e89f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 05:26:02, skipping insertion in model container [2021-12-06 17:26:02,060 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 05:26:02" (3/3) ... [2021-12-06 17:26:02,061 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_OAT_test5-2.i [2021-12-06 17:26:02,065 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 17:26:02,065 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-06 17:26:02,104 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 17:26:02,109 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 [2021-12-06 17:26:02,109 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-06 17:26:02,130 INFO L276 IsEmpty]: Start isEmpty. Operand has 287 states, 271 states have (on average 1.6974169741697418) internal successors, (460), 278 states have internal predecessors, (460), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2021-12-06 17:26:02,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-06 17:26:02,133 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:26:02,134 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:26:02,134 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:26:02,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:26:02,138 INFO L85 PathProgramCache]: Analyzing trace with hash 691392686, now seen corresponding path program 1 times [2021-12-06 17:26:02,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:26:02,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257913147] [2021-12-06 17:26:02,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:26:02,146 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:26:02,222 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 17:26:02,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [776799944] [2021-12-06 17:26:02,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:26:02,223 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:26:02,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27ca112-6ec9-4ea1-b313-480c06bc4b5f/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:26:02,224 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27ca112-6ec9-4ea1-b313-480c06bc4b5f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:26:02,224 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27ca112-6ec9-4ea1-b313-480c06bc4b5f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 17:26:02,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:26:02,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 1 conjunts are in the unsatisfiable core [2021-12-06 17:26:02,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:26:02,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:26:02,364 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 17:26:02,364 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:26:02,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257913147] [2021-12-06 17:26:02,364 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 17:26:02,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776799944] [2021-12-06 17:26:02,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776799944] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:26:02,365 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:26:02,365 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 17:26:02,367 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475285016] [2021-12-06 17:26:02,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:26:02,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-06 17:26:02,370 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:26:02,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-06 17:26:02,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 17:26:02,392 INFO L87 Difference]: Start difference. First operand has 287 states, 271 states have (on average 1.6974169741697418) internal successors, (460), 278 states have internal predecessors, (460), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:26:02,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:26:02,444 INFO L93 Difference]: Finished difference Result 572 states and 967 transitions. [2021-12-06 17:26:02,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-06 17:26:02,445 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 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 8 [2021-12-06 17:26:02,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:26:02,454 INFO L225 Difference]: With dead ends: 572 [2021-12-06 17:26:02,454 INFO L226 Difference]: Without dead ends: 254 [2021-12-06 17:26:02,458 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 17:26:02,460 INFO L933 BasicCegarLoop]: 381 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:26:02,461 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 381 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:26:02,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-12-06 17:26:02,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 254. [2021-12-06 17:26:02,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 239 states have (on average 1.3179916317991631) internal successors, (315), 245 states have internal predecessors, (315), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2021-12-06 17:26:02,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 337 transitions. [2021-12-06 17:26:02,512 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 337 transitions. Word has length 8 [2021-12-06 17:26:02,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:26:02,512 INFO L470 AbstractCegarLoop]: Abstraction has 254 states and 337 transitions. [2021-12-06 17:26:02,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:26:02,513 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 337 transitions. [2021-12-06 17:26:02,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-06 17:26:02,514 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:26:02,515 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:26:02,536 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27ca112-6ec9-4ea1-b313-480c06bc4b5f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 17:26:02,716 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27ca112-6ec9-4ea1-b313-480c06bc4b5f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-12-06 17:26:02,717 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:26:02,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:26:02,719 INFO L85 PathProgramCache]: Analyzing trace with hash -1622673081, now seen corresponding path program 1 times [2021-12-06 17:26:02,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:26:02,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265077053] [2021-12-06 17:26:02,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:26:02,722 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:26:02,781 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 17:26:02,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [611391077] [2021-12-06 17:26:02,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:26:02,783 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:26:02,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27ca112-6ec9-4ea1-b313-480c06bc4b5f/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:26:02,786 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27ca112-6ec9-4ea1-b313-480c06bc4b5f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:26:02,788 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27ca112-6ec9-4ea1-b313-480c06bc4b5f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 17:26:03,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:26:03,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-06 17:26:03,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:26:03,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:26:03,092 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 17:26:03,092 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:26:03,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265077053] [2021-12-06 17:26:03,092 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 17:26:03,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611391077] [2021-12-06 17:26:03,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611391077] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:26:03,093 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:26:03,093 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 17:26:03,093 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398316544] [2021-12-06 17:26:03,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:26:03,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 17:26:03,094 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:26:03,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 17:26:03,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:26:03,095 INFO L87 Difference]: Start difference. First operand 254 states and 337 transitions. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 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) [2021-12-06 17:26:03,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:26:03,148 INFO L93 Difference]: Finished difference Result 573 states and 768 transitions. [2021-12-06 17:26:03,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 17:26:03,149 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 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) Word has length 42 [2021-12-06 17:26:03,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:26:03,154 INFO L225 Difference]: With dead ends: 573 [2021-12-06 17:26:03,154 INFO L226 Difference]: Without dead ends: 495 [2021-12-06 17:26:03,155 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:26:03,156 INFO L933 BasicCegarLoop]: 375 mSDtfsCounter, 300 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 311 SdHoareTripleChecker+Valid, 705 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:26:03,157 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [311 Valid, 705 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:26:03,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2021-12-06 17:26:03,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 255. [2021-12-06 17:26:03,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 240 states have (on average 1.3166666666666667) internal successors, (316), 246 states have internal predecessors, (316), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2021-12-06 17:26:03,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 338 transitions. [2021-12-06 17:26:03,188 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 338 transitions. Word has length 42 [2021-12-06 17:26:03,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:26:03,188 INFO L470 AbstractCegarLoop]: Abstraction has 255 states and 338 transitions. [2021-12-06 17:26:03,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 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) [2021-12-06 17:26:03,189 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 338 transitions. [2021-12-06 17:26:03,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-12-06 17:26:03,194 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:26:03,194 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:26:03,214 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27ca112-6ec9-4ea1-b313-480c06bc4b5f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 17:26:03,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27ca112-6ec9-4ea1-b313-480c06bc4b5f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:26:03,397 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:26:03,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:26:03,399 INFO L85 PathProgramCache]: Analyzing trace with hash 1488765968, now seen corresponding path program 1 times [2021-12-06 17:26:03,399 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:26:03,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272188408] [2021-12-06 17:26:03,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:26:03,401 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:26:03,657 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 17:26:03,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1982004839] [2021-12-06 17:26:03,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:26:03,658 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:26:03,658 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27ca112-6ec9-4ea1-b313-480c06bc4b5f/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:26:03,659 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27ca112-6ec9-4ea1-b313-480c06bc4b5f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:26:03,660 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27ca112-6ec9-4ea1-b313-480c06bc4b5f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 17:26:04,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:26:04,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 3047 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 17:26:04,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:26:04,429 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:26:04,429 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 17:26:04,430 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:26:04,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272188408] [2021-12-06 17:26:04,430 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 17:26:04,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982004839] [2021-12-06 17:26:04,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982004839] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:26:04,431 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:26:04,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 17:26:04,431 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455408980] [2021-12-06 17:26:04,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:26:04,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 17:26:04,432 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:26:04,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 17:26:04,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:26:04,433 INFO L87 Difference]: Start difference. First operand 255 states and 338 transitions. Second operand has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:26:04,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:26:04,488 INFO L93 Difference]: Finished difference Result 528 states and 704 transitions. [2021-12-06 17:26:04,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 17:26:04,488 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 0 states have call successors, (0), 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 140 [2021-12-06 17:26:04,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:26:04,491 INFO L225 Difference]: With dead ends: 528 [2021-12-06 17:26:04,491 INFO L226 Difference]: Without dead ends: 276 [2021-12-06 17:26:04,493 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:26:04,494 INFO L933 BasicCegarLoop]: 317 mSDtfsCounter, 9 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 619 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:26:04,495 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 619 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:26:04,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2021-12-06 17:26:04,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 275. [2021-12-06 17:26:04,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 260 states have (on average 1.2923076923076924) internal successors, (336), 266 states have internal predecessors, (336), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2021-12-06 17:26:04,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 358 transitions. [2021-12-06 17:26:04,515 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 358 transitions. Word has length 140 [2021-12-06 17:26:04,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:26:04,515 INFO L470 AbstractCegarLoop]: Abstraction has 275 states and 358 transitions. [2021-12-06 17:26:04,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:26:04,516 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 358 transitions. [2021-12-06 17:26:04,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-12-06 17:26:04,519 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:26:04,520 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:26:04,544 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27ca112-6ec9-4ea1-b313-480c06bc4b5f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-06 17:26:04,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27ca112-6ec9-4ea1-b313-480c06bc4b5f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:26:04,722 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:26:04,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:26:04,724 INFO L85 PathProgramCache]: Analyzing trace with hash 1918424274, now seen corresponding path program 1 times [2021-12-06 17:26:04,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:26:04,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131560402] [2021-12-06 17:26:04,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:26:04,726 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:26:04,954 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 17:26:04,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [833274223] [2021-12-06 17:26:04,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:26:04,954 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:26:04,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27ca112-6ec9-4ea1-b313-480c06bc4b5f/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:26:04,955 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27ca112-6ec9-4ea1-b313-480c06bc4b5f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:26:04,956 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27ca112-6ec9-4ea1-b313-480c06bc4b5f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 17:26:05,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:26:05,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 3049 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 17:26:05,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:26:05,702 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:26:05,702 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 17:26:05,702 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:26:05,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131560402] [2021-12-06 17:26:05,702 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 17:26:05,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833274223] [2021-12-06 17:26:05,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833274223] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:26:05,703 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:26:05,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 17:26:05,703 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224622516] [2021-12-06 17:26:05,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:26:05,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 17:26:05,704 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:26:05,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 17:26:05,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:26:05,705 INFO L87 Difference]: Start difference. First operand 275 states and 358 transitions. Second operand has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:26:05,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:26:05,751 INFO L93 Difference]: Finished difference Result 568 states and 744 transitions. [2021-12-06 17:26:05,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 17:26:05,751 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 0 states have call successors, (0), 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 140 [2021-12-06 17:26:05,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:26:05,754 INFO L225 Difference]: With dead ends: 568 [2021-12-06 17:26:05,754 INFO L226 Difference]: Without dead ends: 296 [2021-12-06 17:26:05,755 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:26:05,756 INFO L933 BasicCegarLoop]: 319 mSDtfsCounter, 8 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 621 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:26:05,756 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 621 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:26:05,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2021-12-06 17:26:05,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 295. [2021-12-06 17:26:05,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 280 states have (on average 1.2714285714285714) internal successors, (356), 286 states have internal predecessors, (356), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2021-12-06 17:26:05,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 378 transitions. [2021-12-06 17:26:05,771 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 378 transitions. Word has length 140 [2021-12-06 17:26:05,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:26:05,772 INFO L470 AbstractCegarLoop]: Abstraction has 295 states and 378 transitions. [2021-12-06 17:26:05,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:26:05,772 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 378 transitions. [2021-12-06 17:26:05,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-12-06 17:26:05,776 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:26:05,776 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:26:05,800 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27ca112-6ec9-4ea1-b313-480c06bc4b5f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-06 17:26:05,977 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27ca112-6ec9-4ea1-b313-480c06bc4b5f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:26:05,978 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:26:05,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:26:05,980 INFO L85 PathProgramCache]: Analyzing trace with hash -690363184, now seen corresponding path program 1 times [2021-12-06 17:26:05,980 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:26:05,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715576056] [2021-12-06 17:26:05,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:26:05,981 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:26:06,175 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 17:26:06,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1316407561] [2021-12-06 17:26:06,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:26:06,176 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:26:06,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27ca112-6ec9-4ea1-b313-480c06bc4b5f/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:26:06,177 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27ca112-6ec9-4ea1-b313-480c06bc4b5f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:26:06,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27ca112-6ec9-4ea1-b313-480c06bc4b5f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-06 17:26:06,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:26:06,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 3051 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 17:26:06,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:26:06,957 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 17:26:06,957 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 17:26:06,957 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:26:06,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715576056] [2021-12-06 17:26:06,957 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 17:26:06,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316407561] [2021-12-06 17:26:06,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316407561] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:26:06,957 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:26:06,957 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 17:26:06,958 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191903716] [2021-12-06 17:26:06,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:26:06,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 17:26:06,958 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:26:06,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 17:26:06,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:26:06,959 INFO L87 Difference]: Start difference. First operand 295 states and 378 transitions. Second operand has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:26:06,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:26:06,994 INFO L93 Difference]: Finished difference Result 393 states and 514 transitions. [2021-12-06 17:26:06,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 17:26:06,994 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 0 states have call successors, (0), 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 140 [2021-12-06 17:26:06,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:26:06,996 INFO L225 Difference]: With dead ends: 393 [2021-12-06 17:26:06,996 INFO L226 Difference]: Without dead ends: 316 [2021-12-06 17:26:06,997 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:26:06,998 INFO L933 BasicCegarLoop]: 317 mSDtfsCounter, 9 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 619 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:26:06,998 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 619 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:26:06,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2021-12-06 17:26:07,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 315. [2021-12-06 17:26:07,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 300 states have (on average 1.2533333333333334) internal successors, (376), 306 states have internal predecessors, (376), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2021-12-06 17:26:07,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 398 transitions. [2021-12-06 17:26:07,006 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 398 transitions. Word has length 140 [2021-12-06 17:26:07,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:26:07,007 INFO L470 AbstractCegarLoop]: Abstraction has 315 states and 398 transitions. [2021-12-06 17:26:07,007 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:26:07,007 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 398 transitions. [2021-12-06 17:26:07,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-12-06 17:26:07,009 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:26:07,009 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:26:07,034 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27ca112-6ec9-4ea1-b313-480c06bc4b5f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-06 17:26:07,209 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27ca112-6ec9-4ea1-b313-480c06bc4b5f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:26:07,210 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:26:07,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:26:07,212 INFO L85 PathProgramCache]: Analyzing trace with hash -909217902, now seen corresponding path program 1 times [2021-12-06 17:26:07,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:26:07,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089116484] [2021-12-06 17:26:07,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:26:07,213 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:26:07,328 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 17:26:07,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [760438255] [2021-12-06 17:26:07,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:26:07,328 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:26:07,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27ca112-6ec9-4ea1-b313-480c06bc4b5f/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:26:07,329 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27ca112-6ec9-4ea1-b313-480c06bc4b5f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:26:07,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27ca112-6ec9-4ea1-b313-480c06bc4b5f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-06 17:26:08,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:26:08,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 3053 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 17:26:08,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:26:08,234 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:26:08,234 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 17:26:08,234 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:26:08,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089116484] [2021-12-06 17:26:08,235 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 17:26:08,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760438255] [2021-12-06 17:26:08,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760438255] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:26:08,235 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:26:08,235 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 17:26:08,235 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018981417] [2021-12-06 17:26:08,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:26:08,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 17:26:08,236 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:26:08,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 17:26:08,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 17:26:08,237 INFO L87 Difference]: Start difference. First operand 315 states and 398 transitions. Second operand has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:26:08,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:26:08,288 INFO L93 Difference]: Finished difference Result 619 states and 785 transitions. [2021-12-06 17:26:08,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 17:26:08,289 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 0 states have call successors, (0), 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 140 [2021-12-06 17:26:08,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:26:08,300 INFO L225 Difference]: With dead ends: 619 [2021-12-06 17:26:08,301 INFO L226 Difference]: Without dead ends: 307 [2021-12-06 17:26:08,301 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:26:08,302 INFO L933 BasicCegarLoop]: 316 mSDtfsCounter, 294 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 647 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:26:08,302 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [305 Valid, 647 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:26:08,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2021-12-06 17:26:08,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 301. [2021-12-06 17:26:08,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 286 states have (on average 1.2412587412587412) internal successors, (355), 292 states have internal predecessors, (355), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2021-12-06 17:26:08,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 377 transitions. [2021-12-06 17:26:08,311 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 377 transitions. Word has length 140 [2021-12-06 17:26:08,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:26:08,311 INFO L470 AbstractCegarLoop]: Abstraction has 301 states and 377 transitions. [2021-12-06 17:26:08,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:26:08,311 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 377 transitions. [2021-12-06 17:26:08,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-12-06 17:26:08,313 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:26:08,313 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:26:08,339 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27ca112-6ec9-4ea1-b313-480c06bc4b5f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-06 17:26:08,513 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27ca112-6ec9-4ea1-b313-480c06bc4b5f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-12-06 17:26:08,514 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:26:08,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:26:08,514 INFO L85 PathProgramCache]: Analyzing trace with hash -992002364, now seen corresponding path program 1 times [2021-12-06 17:26:08,514 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:26:08,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895649900] [2021-12-06 17:26:08,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:26:08,515 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:26:08,605 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 17:26:08,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [545287497] [2021-12-06 17:26:08,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:26:08,605 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:26:08,605 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27ca112-6ec9-4ea1-b313-480c06bc4b5f/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:26:08,606 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27ca112-6ec9-4ea1-b313-480c06bc4b5f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:26:08,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27ca112-6ec9-4ea1-b313-480c06bc4b5f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-06 17:26:09,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:26:09,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 3039 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 17:26:09,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:26:09,504 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:26:09,504 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 17:26:09,505 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:26:09,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895649900] [2021-12-06 17:26:09,505 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 17:26:09,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545287497] [2021-12-06 17:26:09,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545287497] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:26:09,505 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:26:09,505 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 17:26:09,505 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110099516] [2021-12-06 17:26:09,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:26:09,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 17:26:09,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:26:09,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 17:26:09,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:26:09,506 INFO L87 Difference]: Start difference. First operand 301 states and 377 transitions. Second operand has 5 states, 5 states have (on average 28.0) internal successors, (140), 5 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:26:09,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:26:09,584 INFO L93 Difference]: Finished difference Result 680 states and 852 transitions. [2021-12-06 17:26:09,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 17:26:09,585 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 28.0) internal successors, (140), 5 states have internal predecessors, (140), 0 states have call successors, (0), 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 140 [2021-12-06 17:26:09,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:26:09,587 INFO L225 Difference]: With dead ends: 680 [2021-12-06 17:26:09,587 INFO L226 Difference]: Without dead ends: 382 [2021-12-06 17:26:09,588 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:26:09,588 INFO L933 BasicCegarLoop]: 412 mSDtfsCounter, 276 mSDsluCounter, 918 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 1330 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:26:09,589 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [287 Valid, 1330 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 17:26:09,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2021-12-06 17:26:09,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 287. [2021-12-06 17:26:09,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 272 states have (on average 1.2279411764705883) internal successors, (334), 278 states have internal predecessors, (334), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2021-12-06 17:26:09,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 356 transitions. [2021-12-06 17:26:09,600 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 356 transitions. Word has length 140 [2021-12-06 17:26:09,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:26:09,600 INFO L470 AbstractCegarLoop]: Abstraction has 287 states and 356 transitions. [2021-12-06 17:26:09,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 28.0) internal successors, (140), 5 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:26:09,601 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 356 transitions. [2021-12-06 17:26:09,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-12-06 17:26:09,602 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:26:09,602 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:26:09,632 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27ca112-6ec9-4ea1-b313-480c06bc4b5f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-06 17:26:09,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27ca112-6ec9-4ea1-b313-480c06bc4b5f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:26:09,804 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:26:09,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:26:09,805 INFO L85 PathProgramCache]: Analyzing trace with hash 1368143440, now seen corresponding path program 1 times [2021-12-06 17:26:09,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:26:09,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015303941] [2021-12-06 17:26:09,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:26:09,807 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:26:09,962 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 17:26:09,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [791312903] [2021-12-06 17:26:09,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:26:09,963 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:26:09,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27ca112-6ec9-4ea1-b313-480c06bc4b5f/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:26:09,963 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27ca112-6ec9-4ea1-b313-480c06bc4b5f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:26:09,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27ca112-6ec9-4ea1-b313-480c06bc4b5f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-06 17:26:10,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:26:10,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 3027 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 17:26:10,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:26:10,935 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 17:26:10,935 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 17:26:10,936 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:26:10,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015303941] [2021-12-06 17:26:10,936 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 17:26:10,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791312903] [2021-12-06 17:26:10,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791312903] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:26:10,936 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:26:10,936 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 17:26:10,936 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123925797] [2021-12-06 17:26:10,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:26:10,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 17:26:10,937 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:26:10,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 17:26:10,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 17:26:10,937 INFO L87 Difference]: Start difference. First operand 287 states and 356 transitions. Second operand has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:26:10,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:26:10,979 INFO L93 Difference]: Finished difference Result 375 states and 472 transitions. [2021-12-06 17:26:10,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 17:26:10,980 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 0 states have call successors, (0), 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 140 [2021-12-06 17:26:10,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:26:10,981 INFO L225 Difference]: With dead ends: 375 [2021-12-06 17:26:10,982 INFO L226 Difference]: Without dead ends: 278 [2021-12-06 17:26:10,982 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:26:10,982 INFO L933 BasicCegarLoop]: 300 mSDtfsCounter, 80 mSDsluCounter, 519 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 819 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:26:10,983 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 819 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:26:10,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-12-06 17:26:10,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 273. [2021-12-06 17:26:10,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 258 states have (on average 1.2131782945736433) internal successors, (313), 264 states have internal predecessors, (313), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2021-12-06 17:26:10,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 335 transitions. [2021-12-06 17:26:10,991 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 335 transitions. Word has length 140 [2021-12-06 17:26:10,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:26:10,991 INFO L470 AbstractCegarLoop]: Abstraction has 273 states and 335 transitions. [2021-12-06 17:26:10,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:26:10,992 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 335 transitions. [2021-12-06 17:26:10,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-12-06 17:26:10,993 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:26:10,993 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:26:11,020 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27ca112-6ec9-4ea1-b313-480c06bc4b5f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-06 17:26:11,194 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27ca112-6ec9-4ea1-b313-480c06bc4b5f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:26:11,195 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:26:11,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:26:11,195 INFO L85 PathProgramCache]: Analyzing trace with hash 485294594, now seen corresponding path program 1 times [2021-12-06 17:26:11,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:26:11,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025793679] [2021-12-06 17:26:11,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:26:11,196 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:26:11,335 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 17:26:11,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [299624054] [2021-12-06 17:26:11,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:26:11,335 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:26:11,335 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27ca112-6ec9-4ea1-b313-480c06bc4b5f/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:26:11,336 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27ca112-6ec9-4ea1-b313-480c06bc4b5f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:26:11,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27ca112-6ec9-4ea1-b313-480c06bc4b5f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-06 17:26:12,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:26:12,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 3013 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 17:26:12,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:26:12,416 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:26:12,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:26:12,578 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:26:12,578 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:26:12,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025793679] [2021-12-06 17:26:12,578 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 17:26:12,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299624054] [2021-12-06 17:26:12,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [299624054] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:26:12,578 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:26:12,579 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-12-06 17:26:12,579 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791352125] [2021-12-06 17:26:12,579 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:26:12,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 17:26:12,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:26:12,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 17:26:12,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-12-06 17:26:12,580 INFO L87 Difference]: Start difference. First operand 273 states and 335 transitions. Second operand has 6 states, 6 states have (on average 40.0) internal successors, (240), 6 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:26:12,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:26:12,682 INFO L93 Difference]: Finished difference Result 1057 states and 1307 transitions. [2021-12-06 17:26:12,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 17:26:12,683 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 40.0) internal successors, (240), 6 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 140 [2021-12-06 17:26:12,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:26:12,688 INFO L225 Difference]: With dead ends: 1057 [2021-12-06 17:26:12,688 INFO L226 Difference]: Without dead ends: 973 [2021-12-06 17:26:12,689 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 274 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-12-06 17:26:12,689 INFO L933 BasicCegarLoop]: 432 mSDtfsCounter, 1033 mSDsluCounter, 982 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1072 SdHoareTripleChecker+Valid, 1414 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:26:12,689 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1072 Valid, 1414 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 17:26:12,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 973 states. [2021-12-06 17:26:12,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 973 to 819. [2021-12-06 17:26:12,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 819 states, 786 states have (on average 1.1997455470737914) internal successors, (943), 792 states have internal predecessors, (943), 29 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (29), 25 states have call predecessors, (29), 29 states have call successors, (29) [2021-12-06 17:26:12,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 819 states to 819 states and 1001 transitions. [2021-12-06 17:26:12,718 INFO L78 Accepts]: Start accepts. Automaton has 819 states and 1001 transitions. Word has length 140 [2021-12-06 17:26:12,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:26:12,718 INFO L470 AbstractCegarLoop]: Abstraction has 819 states and 1001 transitions. [2021-12-06 17:26:12,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 40.0) internal successors, (240), 6 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:26:12,718 INFO L276 IsEmpty]: Start isEmpty. Operand 819 states and 1001 transitions. [2021-12-06 17:26:12,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 435 [2021-12-06 17:26:12,725 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:26:12,726 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:26:12,766 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27ca112-6ec9-4ea1-b313-480c06bc4b5f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-06 17:26:12,926 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27ca112-6ec9-4ea1-b313-480c06bc4b5f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:26:12,928 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:26:12,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:26:12,930 INFO L85 PathProgramCache]: Analyzing trace with hash -541614505, now seen corresponding path program 2 times [2021-12-06 17:26:12,930 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:26:12,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064458168] [2021-12-06 17:26:12,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:26:12,932 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:26:13,318 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 17:26:13,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1413451471] [2021-12-06 17:26:13,318 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 17:26:13,318 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:26:13,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27ca112-6ec9-4ea1-b313-480c06bc4b5f/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:26:13,319 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27ca112-6ec9-4ea1-b313-480c06bc4b5f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:26:13,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27ca112-6ec9-4ea1-b313-480c06bc4b5f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-06 17:26:15,612 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 17:26:15,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:26:15,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 11668 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-06 17:26:15,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:26:16,152 INFO L134 CoverageAnalysis]: Checked inductivity of 592 backedges. 0 proven. 592 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:26:16,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:26:16,580 INFO L134 CoverageAnalysis]: Checked inductivity of 592 backedges. 0 proven. 592 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:26:16,580 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:26:16,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064458168] [2021-12-06 17:26:16,580 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 17:26:16,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413451471] [2021-12-06 17:26:16,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413451471] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:26:16,580 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:26:16,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-12-06 17:26:16,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951506480] [2021-12-06 17:26:16,581 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:26:16,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-06 17:26:16,582 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:26:16,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-06 17:26:16,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-12-06 17:26:16,583 INFO L87 Difference]: Start difference. First operand 819 states and 1001 transitions. Second operand has 12 states, 12 states have (on average 69.0) internal successors, (828), 12 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:26:16,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:26:16,879 INFO L93 Difference]: Finished difference Result 2380 states and 2939 transitions. [2021-12-06 17:26:16,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-06 17:26:16,880 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 69.0) internal successors, (828), 12 states have internal predecessors, (828), 0 states have call successors, (0), 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 434 [2021-12-06 17:26:16,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:26:16,890 INFO L225 Difference]: With dead ends: 2380 [2021-12-06 17:26:16,890 INFO L226 Difference]: Without dead ends: 2296 [2021-12-06 17:26:16,892 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 866 GetRequests, 856 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-12-06 17:26:16,892 INFO L933 BasicCegarLoop]: 521 mSDtfsCounter, 3878 mSDsluCounter, 2483 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3968 SdHoareTripleChecker+Valid, 3004 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:26:16,892 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3968 Valid, 3004 Invalid, 329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 17:26:16,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2296 states. [2021-12-06 17:26:16,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2296 to 1911. [2021-12-06 17:26:16,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1911 states, 1842 states have (on average 1.1959826275787189) internal successors, (2203), 1848 states have internal predecessors, (2203), 65 states have call successors, (65), 2 states have call predecessors, (65), 2 states have return successors, (65), 61 states have call predecessors, (65), 65 states have call successors, (65) [2021-12-06 17:26:16,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1911 states to 1911 states and 2333 transitions. [2021-12-06 17:26:16,942 INFO L78 Accepts]: Start accepts. Automaton has 1911 states and 2333 transitions. Word has length 434 [2021-12-06 17:26:16,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:26:16,943 INFO L470 AbstractCegarLoop]: Abstraction has 1911 states and 2333 transitions. [2021-12-06 17:26:16,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 69.0) internal successors, (828), 12 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:26:16,943 INFO L276 IsEmpty]: Start isEmpty. Operand 1911 states and 2333 transitions. [2021-12-06 17:26:16,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1023 [2021-12-06 17:26:16,967 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:26:16,968 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:26:17,024 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27ca112-6ec9-4ea1-b313-480c06bc4b5f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-12-06 17:26:17,168 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27ca112-6ec9-4ea1-b313-480c06bc4b5f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-06 17:26:17,169 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:26:17,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:26:17,169 INFO L85 PathProgramCache]: Analyzing trace with hash 1302990785, now seen corresponding path program 3 times [2021-12-06 17:26:17,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:26:17,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209090354] [2021-12-06 17:26:17,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:26:17,170 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:26:17,977 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 17:26:17,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1463590015] [2021-12-06 17:26:17,977 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 17:26:17,977 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:26:17,977 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27ca112-6ec9-4ea1-b313-480c06bc4b5f/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:26:17,978 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27ca112-6ec9-4ea1-b313-480c06bc4b5f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:26:17,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27ca112-6ec9-4ea1-b313-480c06bc4b5f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-06 17:26:20,830 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-06 17:26:20,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:26:20,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 3013 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-06 17:26:20,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:26:23,061 INFO L134 CoverageAnalysis]: Checked inductivity of 4420 backedges. 145 proven. 0 refuted. 0 times theorem prover too weak. 4275 trivial. 0 not checked. [2021-12-06 17:26:23,061 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 17:26:23,061 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:26:23,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209090354] [2021-12-06 17:26:23,061 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 17:26:23,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463590015] [2021-12-06 17:26:23,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463590015] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:26:23,061 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:26:23,062 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 17:26:23,062 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162536510] [2021-12-06 17:26:23,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:26:23,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 17:26:23,063 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:26:23,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 17:26:23,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:26:23,063 INFO L87 Difference]: Start difference. First operand 1911 states and 2333 transitions. Second operand has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:26:23,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:26:23,139 INFO L93 Difference]: Finished difference Result 3736 states and 4568 transitions. [2021-12-06 17:26:23,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 17:26:23,139 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 0 states have call successors, (0), 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 1022 [2021-12-06 17:26:23,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:26:23,150 INFO L225 Difference]: With dead ends: 3736 [2021-12-06 17:26:23,150 INFO L226 Difference]: Without dead ends: 1970 [2021-12-06 17:26:23,154 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1021 GetRequests, 1020 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:26:23,154 INFO L933 BasicCegarLoop]: 364 mSDtfsCounter, 124 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 660 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:26:23,155 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 660 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:26:23,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1970 states. [2021-12-06 17:26:23,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1970 to 1968. [2021-12-06 17:26:23,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1968 states, 1894 states have (on average 1.195881731784583) internal successors, (2265), 1905 states have internal predecessors, (2265), 70 states have call successors, (70), 2 states have call predecessors, (70), 2 states have return successors, (70), 62 states have call predecessors, (70), 70 states have call successors, (70) [2021-12-06 17:26:23,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1968 states to 1968 states and 2405 transitions. [2021-12-06 17:26:23,203 INFO L78 Accepts]: Start accepts. Automaton has 1968 states and 2405 transitions. Word has length 1022 [2021-12-06 17:26:23,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:26:23,203 INFO L470 AbstractCegarLoop]: Abstraction has 1968 states and 2405 transitions. [2021-12-06 17:26:23,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:26:23,204 INFO L276 IsEmpty]: Start isEmpty. Operand 1968 states and 2405 transitions. [2021-12-06 17:26:23,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1038 [2021-12-06 17:26:23,216 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:26:23,216 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:26:23,263 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27ca112-6ec9-4ea1-b313-480c06bc4b5f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-12-06 17:26:23,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27ca112-6ec9-4ea1-b313-480c06bc4b5f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-06 17:26:23,417 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:26:23,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:26:23,417 INFO L85 PathProgramCache]: Analyzing trace with hash 1607178450, now seen corresponding path program 1 times [2021-12-06 17:26:23,418 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:26:23,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24985431] [2021-12-06 17:26:23,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:26:23,418 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:26:24,196 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 17:26:24,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [575464950] [2021-12-06 17:26:24,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:26:24,197 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:26:24,197 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27ca112-6ec9-4ea1-b313-480c06bc4b5f/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:26:24,198 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27ca112-6ec9-4ea1-b313-480c06bc4b5f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:26:24,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27ca112-6ec9-4ea1-b313-480c06bc4b5f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-06 17:26:30,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:26:30,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 28115 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-06 17:26:30,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:26:31,097 INFO L134 CoverageAnalysis]: Checked inductivity of 4406 backedges. 325 proven. 0 refuted. 0 times theorem prover too weak. 4081 trivial. 0 not checked. [2021-12-06 17:26:31,097 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 17:26:31,097 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:26:31,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24985431] [2021-12-06 17:26:31,097 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 17:26:31,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575464950] [2021-12-06 17:26:31,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575464950] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:26:31,097 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:26:31,098 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 17:26:31,098 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101321578] [2021-12-06 17:26:31,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:26:31,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 17:26:31,099 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:26:31,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 17:26:31,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:26:31,099 INFO L87 Difference]: Start difference. First operand 1968 states and 2405 transitions. Second operand has 3 states, 3 states have (on average 62.333333333333336) internal successors, (187), 3 states have internal predecessors, (187), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-06 17:26:31,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:26:31,147 INFO L93 Difference]: Finished difference Result 3878 states and 4744 transitions. [2021-12-06 17:26:31,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 17:26:31,150 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 62.333333333333336) internal successors, (187), 3 states have internal predecessors, (187), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 1037 [2021-12-06 17:26:31,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:26:31,157 INFO L225 Difference]: With dead ends: 3878 [2021-12-06 17:26:31,157 INFO L226 Difference]: Without dead ends: 1966 [2021-12-06 17:26:31,160 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1036 GetRequests, 1035 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:26:31,160 INFO L933 BasicCegarLoop]: 315 mSDtfsCounter, 15 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 616 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:26:31,161 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 616 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:26:31,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1966 states. [2021-12-06 17:26:31,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1966 to 1966. [2021-12-06 17:26:31,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1966 states, 1892 states have (on average 1.1955602536997887) internal successors, (2262), 1903 states have internal predecessors, (2262), 70 states have call successors, (70), 2 states have call predecessors, (70), 2 states have return successors, (70), 62 states have call predecessors, (70), 70 states have call successors, (70) [2021-12-06 17:26:31,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1966 states to 1966 states and 2402 transitions. [2021-12-06 17:26:31,203 INFO L78 Accepts]: Start accepts. Automaton has 1966 states and 2402 transitions. Word has length 1037 [2021-12-06 17:26:31,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:26:31,203 INFO L470 AbstractCegarLoop]: Abstraction has 1966 states and 2402 transitions. [2021-12-06 17:26:31,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.333333333333336) internal successors, (187), 3 states have internal predecessors, (187), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-06 17:26:31,203 INFO L276 IsEmpty]: Start isEmpty. Operand 1966 states and 2402 transitions. [2021-12-06 17:26:31,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1053 [2021-12-06 17:26:31,220 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:26:31,221 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:26:31,317 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27ca112-6ec9-4ea1-b313-480c06bc4b5f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-12-06 17:26:31,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27ca112-6ec9-4ea1-b313-480c06bc4b5f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:26:31,423 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:26:31,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:26:31,425 INFO L85 PathProgramCache]: Analyzing trace with hash -552910831, now seen corresponding path program 1 times [2021-12-06 17:26:31,425 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:26:31,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809807904] [2021-12-06 17:26:31,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:26:31,426 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:26:32,183 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 17:26:32,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [708264771] [2021-12-06 17:26:32,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:26:32,184 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:26:32,184 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27ca112-6ec9-4ea1-b313-480c06bc4b5f/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:26:32,185 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27ca112-6ec9-4ea1-b313-480c06bc4b5f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:26:32,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27ca112-6ec9-4ea1-b313-480c06bc4b5f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-06 17:26:38,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:26:39,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 27252 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-06 17:26:39,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:26:41,238 INFO L134 CoverageAnalysis]: Checked inductivity of 4408 backedges. 1431 proven. 0 refuted. 0 times theorem prover too weak. 2977 trivial. 0 not checked. [2021-12-06 17:26:41,238 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 17:26:41,238 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:26:41,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809807904] [2021-12-06 17:26:41,238 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 17:26:41,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708264771] [2021-12-06 17:26:41,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708264771] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:26:41,239 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:26:41,239 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 17:26:41,239 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470234945] [2021-12-06 17:26:41,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:26:41,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 17:26:41,240 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:26:41,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 17:26:41,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:26:41,241 INFO L87 Difference]: Start difference. First operand 1966 states and 2402 transitions. Second operand has 3 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-06 17:26:41,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:26:41,325 INFO L93 Difference]: Finished difference Result 4886 states and 5976 transitions. [2021-12-06 17:26:41,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 17:26:41,326 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 1052 [2021-12-06 17:26:41,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:26:41,340 INFO L225 Difference]: With dead ends: 4886 [2021-12-06 17:26:41,340 INFO L226 Difference]: Without dead ends: 3418 [2021-12-06 17:26:41,342 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1051 GetRequests, 1050 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:26:41,342 INFO L933 BasicCegarLoop]: 480 mSDtfsCounter, 141 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 768 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:26:41,343 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 768 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:26:41,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3418 states. [2021-12-06 17:26:41,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3418 to 3416. [2021-12-06 17:26:41,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3416 states, 3309 states have (on average 1.1967361740707163) internal successors, (3960), 3320 states have internal predecessors, (3960), 103 states have call successors, (103), 2 states have call predecessors, (103), 2 states have return successors, (103), 95 states have call predecessors, (103), 103 states have call successors, (103) [2021-12-06 17:26:41,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3416 states to 3416 states and 4166 transitions. [2021-12-06 17:26:41,438 INFO L78 Accepts]: Start accepts. Automaton has 3416 states and 4166 transitions. Word has length 1052 [2021-12-06 17:26:41,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:26:41,440 INFO L470 AbstractCegarLoop]: Abstraction has 3416 states and 4166 transitions. [2021-12-06 17:26:41,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-06 17:26:41,440 INFO L276 IsEmpty]: Start isEmpty. Operand 3416 states and 4166 transitions. [2021-12-06 17:26:41,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1060 [2021-12-06 17:26:41,458 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:26:41,459 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:26:41,569 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27ca112-6ec9-4ea1-b313-480c06bc4b5f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-12-06 17:26:41,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27ca112-6ec9-4ea1-b313-480c06bc4b5f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-06 17:26:41,661 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:26:41,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:26:41,663 INFO L85 PathProgramCache]: Analyzing trace with hash 342774203, now seen corresponding path program 1 times [2021-12-06 17:26:41,663 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:26:41,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370492956] [2021-12-06 17:26:41,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:26:41,664 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:26:42,478 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 17:26:42,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1128954822] [2021-12-06 17:26:42,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:26:42,478 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:26:42,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27ca112-6ec9-4ea1-b313-480c06bc4b5f/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:26:42,479 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27ca112-6ec9-4ea1-b313-480c06bc4b5f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:26:42,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27ca112-6ec9-4ea1-b313-480c06bc4b5f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process