./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-patterns/array5_pattern.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-patterns/array5_pattern.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF --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 3dd3ea9d30e76cbd39a744e53feb2b89c359b5b85c7df24161ceaf060cda3b02 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 06:57:44,431 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 06:57:44,435 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 06:57:44,516 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 06:57:44,517 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 06:57:44,523 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 06:57:44,526 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 06:57:44,531 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 06:57:44,534 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 06:57:44,542 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 06:57:44,543 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 06:57:44,546 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 06:57:44,547 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 06:57:44,550 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 06:57:44,553 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 06:57:44,561 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 06:57:44,563 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 06:57:44,565 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 06:57:44,568 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 06:57:44,582 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 06:57:44,585 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 06:57:44,587 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 06:57:44,591 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 06:57:44,593 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 06:57:44,605 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 06:57:44,605 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 06:57:44,606 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 06:57:44,609 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 06:57:44,610 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 06:57:44,612 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 06:57:44,612 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 06:57:44,614 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 06:57:44,616 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 06:57:44,618 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 06:57:44,620 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 06:57:44,621 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 06:57:44,622 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 06:57:44,622 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 06:57:44,623 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 06:57:44,624 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 06:57:44,625 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 06:57:44,627 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-20 06:57:44,686 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 06:57:44,687 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 06:57:44,688 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 06:57:44,688 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 06:57:44,698 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 06:57:44,698 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 06:57:44,699 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 06:57:44,700 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 06:57:44,700 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 06:57:44,700 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 06:57:44,705 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 06:57:44,706 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 06:57:44,706 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 06:57:44,706 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 06:57:44,706 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 06:57:44,707 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 06:57:44,707 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 06:57:44,707 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 06:57:44,708 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 06:57:44,708 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 06:57:44,708 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 06:57:44,709 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 06:57:44,709 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 06:57:44,709 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 06:57:44,710 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:57:44,710 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 06:57:44,710 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 06:57:44,711 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 06:57:44,711 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 06:57:44,714 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 06:57:44,714 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-20 06:57:44,715 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-20 06:57:44,715 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 06:57:44,716 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 06:57:44,716 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_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3dd3ea9d30e76cbd39a744e53feb2b89c359b5b85c7df24161ceaf060cda3b02 [2021-11-20 06:57:45,080 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 06:57:45,115 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 06:57:45,119 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 06:57:45,121 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 06:57:45,122 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 06:57:45,124 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/array-patterns/array5_pattern.c [2021-11-20 06:57:45,208 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/data/d5dcc92a0/5354faaa74c64791b9eceafcd16821bf/FLAG6f7b4e5aa [2021-11-20 06:57:45,764 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 06:57:45,765 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/sv-benchmarks/c/array-patterns/array5_pattern.c [2021-11-20 06:57:45,772 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/data/d5dcc92a0/5354faaa74c64791b9eceafcd16821bf/FLAG6f7b4e5aa [2021-11-20 06:57:46,143 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/data/d5dcc92a0/5354faaa74c64791b9eceafcd16821bf [2021-11-20 06:57:46,146 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 06:57:46,149 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 06:57:46,153 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 06:57:46,154 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 06:57:46,157 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 06:57:46,158 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:57:46" (1/1) ... [2021-11-20 06:57:46,163 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a4fef16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:57:46, skipping insertion in model container [2021-11-20 06:57:46,163 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:57:46" (1/1) ... [2021-11-20 06:57:46,169 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 06:57:46,184 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 06:57:46,400 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_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/sv-benchmarks/c/array-patterns/array5_pattern.c[1890,1903] [2021-11-20 06:57:46,431 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:57:46,446 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 06:57:46,468 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_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/sv-benchmarks/c/array-patterns/array5_pattern.c[1890,1903] [2021-11-20 06:57:46,485 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:57:46,502 INFO L208 MainTranslator]: Completed translation [2021-11-20 06:57:46,503 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:57:46 WrapperNode [2021-11-20 06:57:46,503 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 06:57:46,504 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 06:57:46,505 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 06:57:46,505 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 06:57:46,514 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:57:46" (1/1) ... [2021-11-20 06:57:46,538 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:57:46" (1/1) ... [2021-11-20 06:57:46,579 INFO L137 Inliner]: procedures = 16, calls = 24, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 85 [2021-11-20 06:57:46,582 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 06:57:46,583 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 06:57:46,584 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 06:57:46,584 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 06:57:46,594 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:57:46" (1/1) ... [2021-11-20 06:57:46,595 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:57:46" (1/1) ... [2021-11-20 06:57:46,603 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:57:46" (1/1) ... [2021-11-20 06:57:46,603 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:57:46" (1/1) ... [2021-11-20 06:57:46,626 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:57:46" (1/1) ... [2021-11-20 06:57:46,638 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:57:46" (1/1) ... [2021-11-20 06:57:46,640 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:57:46" (1/1) ... [2021-11-20 06:57:46,646 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 06:57:46,652 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 06:57:46,653 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 06:57:46,653 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 06:57:46,655 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:57:46" (1/1) ... [2021-11-20 06:57:46,668 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:57:46,685 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:57:46,700 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 06:57:46,717 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 06:57:46,756 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 06:57:46,756 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-20 06:57:46,757 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-20 06:57:46,757 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 06:57:46,757 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-20 06:57:46,757 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-20 06:57:46,758 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 06:57:46,758 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 06:57:46,758 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-20 06:57:46,758 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 06:57:46,849 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 06:57:46,851 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 06:57:47,154 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 06:57:47,161 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 06:57:47,162 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-20 06:57:47,164 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:57:47 BoogieIcfgContainer [2021-11-20 06:57:47,164 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 06:57:47,167 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 06:57:47,167 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 06:57:47,171 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 06:57:47,171 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 06:57:46" (1/3) ... [2021-11-20 06:57:47,172 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ee55e8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:57:47, skipping insertion in model container [2021-11-20 06:57:47,173 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:57:46" (2/3) ... [2021-11-20 06:57:47,173 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ee55e8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:57:47, skipping insertion in model container [2021-11-20 06:57:47,174 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:57:47" (3/3) ... [2021-11-20 06:57:47,175 INFO L111 eAbstractionObserver]: Analyzing ICFG array5_pattern.c [2021-11-20 06:57:47,182 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 06:57:47,197 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 06:57:47,255 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 06:57:47,263 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-20 06:57:47,264 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 06:57:47,284 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 06:57:47,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-20 06:57:47,291 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:57:47,292 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:57:47,292 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:57:47,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:57:47,299 INFO L85 PathProgramCache]: Analyzing trace with hash 1359011546, now seen corresponding path program 1 times [2021-11-20 06:57:47,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:57:47,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201259334] [2021-11-20 06:57:47,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:57:47,312 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:57:47,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:57:47,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:57:47,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:57:47,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:57:47,612 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:57:47,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201259334] [2021-11-20 06:57:47,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201259334] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:57:47,615 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:57:47,617 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 06:57:47,619 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338607557] [2021-11-20 06:57:47,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:57:47,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-20 06:57:47,628 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:57:47,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-20 06:57:47,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 06:57:47,666 INFO L87 Difference]: Start difference. First operand has 28 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 06:57:47,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:57:47,714 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2021-11-20 06:57:47,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 06:57:47,717 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2021-11-20 06:57:47,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:57:47,727 INFO L225 Difference]: With dead ends: 53 [2021-11-20 06:57:47,727 INFO L226 Difference]: Without dead ends: 24 [2021-11-20 06:57:47,731 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 06:57:47,737 INFO L933 BasicCegarLoop]: 33 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, 33 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 [2021-11-20 06:57:47,738 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:57:47,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-11-20 06:57:47,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-11-20 06:57:47,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 06:57:47,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2021-11-20 06:57:47,788 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 16 [2021-11-20 06:57:47,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:57:47,788 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2021-11-20 06:57:47,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 06:57:47,789 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2021-11-20 06:57:47,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-20 06:57:47,792 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:57:47,792 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:57:47,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 06:57:47,793 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:57:47,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:57:47,794 INFO L85 PathProgramCache]: Analyzing trace with hash 1765206397, now seen corresponding path program 1 times [2021-11-20 06:57:47,795 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:57:47,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927112995] [2021-11-20 06:57:47,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:57:47,796 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:57:47,832 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:57:47,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1494728885] [2021-11-20 06:57:47,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:57:47,833 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:57:47,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:57:47,835 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:57:47,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 06:57:47,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:57:47,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 06:57:47,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:57:48,064 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 06:57:48,064 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:57:48,065 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:57:48,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927112995] [2021-11-20 06:57:48,065 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:57:48,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494728885] [2021-11-20 06:57:48,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494728885] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:57:48,067 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:57:48,067 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:57:48,068 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370460938] [2021-11-20 06:57:48,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:57:48,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:57:48,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:57:48,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:57:48,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:57:48,071 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 06:57:48,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:57:48,135 INFO L93 Difference]: Finished difference Result 55 states and 67 transitions. [2021-11-20 06:57:48,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:57:48,136 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 25 [2021-11-20 06:57:48,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:57:48,138 INFO L225 Difference]: With dead ends: 55 [2021-11-20 06:57:48,139 INFO L226 Difference]: Without dead ends: 38 [2021-11-20 06:57:48,139 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:57:48,141 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 9 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:57:48,142 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 34 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:57:48,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-11-20 06:57:48,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 28. [2021-11-20 06:57:48,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 states have internal predecessors, (29), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 06:57:48,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2021-11-20 06:57:48,157 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 25 [2021-11-20 06:57:48,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:57:48,161 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2021-11-20 06:57:48,161 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 06:57:48,161 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2021-11-20 06:57:48,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-20 06:57:48,165 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:57:48,165 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:57:48,209 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 06:57:48,389 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:57:48,389 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:57:48,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:57:48,390 INFO L85 PathProgramCache]: Analyzing trace with hash 955859771, now seen corresponding path program 1 times [2021-11-20 06:57:48,390 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:57:48,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946951235] [2021-11-20 06:57:48,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:57:48,391 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:57:48,438 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:57:48,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [894519799] [2021-11-20 06:57:48,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:57:48,443 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:57:48,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:57:48,444 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:57:48,477 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 06:57:48,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:57:48,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-20 06:57:48,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:57:48,693 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 06:57:48,693 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:57:48,693 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:57:48,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946951235] [2021-11-20 06:57:48,693 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:57:48,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894519799] [2021-11-20 06:57:48,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894519799] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:57:48,695 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:57:48,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:57:48,696 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982447187] [2021-11-20 06:57:48,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:57:48,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:57:48,698 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:57:48,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:57:48,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:57:48,700 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 06:57:48,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:57:48,734 INFO L93 Difference]: Finished difference Result 33 states and 40 transitions. [2021-11-20 06:57:48,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:57:48,734 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 25 [2021-11-20 06:57:48,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:57:48,737 INFO L225 Difference]: With dead ends: 33 [2021-11-20 06:57:48,737 INFO L226 Difference]: Without dead ends: 29 [2021-11-20 06:57:48,740 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:57:48,744 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 6 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:57:48,746 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 64 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:57:48,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-11-20 06:57:48,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-11-20 06:57:48,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.25) internal successors, (30), 24 states have internal predecessors, (30), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 06:57:48,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2021-11-20 06:57:48,766 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 25 [2021-11-20 06:57:48,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:57:48,766 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2021-11-20 06:57:48,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 06:57:48,767 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2021-11-20 06:57:48,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-20 06:57:48,770 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:57:48,770 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:57:48,800 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-11-20 06:57:48,982 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:57:48,983 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:57:48,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:57:48,983 INFO L85 PathProgramCache]: Analyzing trace with hash -488527555, now seen corresponding path program 1 times [2021-11-20 06:57:48,983 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:57:48,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101613808] [2021-11-20 06:57:48,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:57:48,984 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:57:49,013 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:57:49,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1019233754] [2021-11-20 06:57:49,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:57:49,021 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:57:49,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:57:49,022 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:57:49,049 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 06:57:49,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:57:49,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 06:57:49,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:57:49,216 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:57:49,216 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:57:49,216 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:57:49,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101613808] [2021-11-20 06:57:49,216 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:57:49,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019233754] [2021-11-20 06:57:49,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019233754] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:57:49,217 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:57:49,217 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 06:57:49,217 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246397071] [2021-11-20 06:57:49,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:57:49,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 06:57:49,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:57:49,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 06:57:49,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:57:49,219 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 06:57:49,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:57:49,332 INFO L93 Difference]: Finished difference Result 57 states and 70 transitions. [2021-11-20 06:57:49,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 06:57:49,333 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 27 [2021-11-20 06:57:49,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:57:49,334 INFO L225 Difference]: With dead ends: 57 [2021-11-20 06:57:49,334 INFO L226 Difference]: Without dead ends: 33 [2021-11-20 06:57:49,335 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:57:49,336 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 12 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:57:49,336 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 62 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:57:49,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-11-20 06:57:49,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2021-11-20 06:57:49,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.24) internal successors, (31), 25 states have internal predecessors, (31), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 06:57:49,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2021-11-20 06:57:49,343 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 27 [2021-11-20 06:57:49,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:57:49,344 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2021-11-20 06:57:49,344 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 06:57:49,344 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2021-11-20 06:57:49,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-20 06:57:49,345 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:57:49,346 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:57:49,387 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-20 06:57:49,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:57:49,573 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:57:49,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:57:49,574 INFO L85 PathProgramCache]: Analyzing trace with hash -309168389, now seen corresponding path program 1 times [2021-11-20 06:57:49,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:57:49,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207558515] [2021-11-20 06:57:49,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:57:49,575 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:57:49,603 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:57:49,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1721571694] [2021-11-20 06:57:49,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:57:49,604 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:57:49,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:57:49,605 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:57:49,618 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 06:57:49,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:57:49,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-20 06:57:49,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:57:49,818 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:57:49,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:57:50,127 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 06:57:50,128 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:57:50,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207558515] [2021-11-20 06:57:50,128 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:57:50,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721571694] [2021-11-20 06:57:50,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1721571694] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:57:50,129 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:57:50,129 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-11-20 06:57:50,129 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997311418] [2021-11-20 06:57:50,130 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:57:50,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-20 06:57:50,130 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:57:50,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-20 06:57:50,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-20 06:57:50,132 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 9 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-20 06:57:50,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:57:50,422 INFO L93 Difference]: Finished difference Result 124 states and 152 transitions. [2021-11-20 06:57:50,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-20 06:57:50,423 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 9 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2021-11-20 06:57:50,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:57:50,429 INFO L225 Difference]: With dead ends: 124 [2021-11-20 06:57:50,429 INFO L226 Difference]: Without dead ends: 105 [2021-11-20 06:57:50,430 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2021-11-20 06:57:50,432 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 102 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:57:50,432 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 116 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 06:57:50,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-11-20 06:57:50,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 51. [2021-11-20 06:57:50,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 43 states have (on average 1.255813953488372) internal successors, (54), 43 states have internal predecessors, (54), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-20 06:57:50,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 64 transitions. [2021-11-20 06:57:50,461 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 64 transitions. Word has length 29 [2021-11-20 06:57:50,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:57:50,462 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 64 transitions. [2021-11-20 06:57:50,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 9 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-20 06:57:50,462 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 64 transitions. [2021-11-20 06:57:50,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-20 06:57:50,464 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:57:50,464 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:57:50,493 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-20 06:57:50,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:57:50,665 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:57:50,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:57:50,665 INFO L85 PathProgramCache]: Analyzing trace with hash -1010232967, now seen corresponding path program 1 times [2021-11-20 06:57:50,666 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:57:50,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192650568] [2021-11-20 06:57:50,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:57:50,666 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:57:50,685 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:57:50,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [330832349] [2021-11-20 06:57:50,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:57:50,686 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:57:50,686 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:57:50,687 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:57:50,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-20 06:57:50,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:57:50,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-20 06:57:50,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:57:50,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-20 06:57:51,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 29 [2021-11-20 06:57:51,433 INFO L354 Elim1Store]: treesize reduction 82, result has 7.9 percent of original size [2021-11-20 06:57:51,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 30 [2021-11-20 06:57:51,485 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:57:51,485 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:57:51,627 INFO L354 Elim1Store]: treesize reduction 23, result has 57.4 percent of original size [2021-11-20 06:57:51,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 454 treesize of output 348 [2021-11-20 06:57:51,659 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 06:57:51,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 348 treesize of output 336 [2021-11-20 06:57:51,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-11-20 06:57:51,784 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:57:51,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-11-20 06:57:55,733 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 06:57:55,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 178 treesize of output 188 [2021-11-20 06:57:57,252 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:57:57,252 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:57:57,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192650568] [2021-11-20 06:57:57,252 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:57:57,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330832349] [2021-11-20 06:57:57,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330832349] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:57:57,253 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:57:57,253 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-11-20 06:57:57,253 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784751920] [2021-11-20 06:57:57,254 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:57:57,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-20 06:57:57,254 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:57:57,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-20 06:57:57,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-11-20 06:57:57,256 INFO L87 Difference]: Start difference. First operand 51 states and 64 transitions. Second operand has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 20 states have internal predecessors, (40), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 06:57:57,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:57:57,635 INFO L93 Difference]: Finished difference Result 72 states and 87 transitions. [2021-11-20 06:57:57,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-20 06:57:57,637 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 20 states have internal predecessors, (40), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 29 [2021-11-20 06:57:57,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:57:57,640 INFO L225 Difference]: With dead ends: 72 [2021-11-20 06:57:57,640 INFO L226 Difference]: Without dead ends: 68 [2021-11-20 06:57:57,641 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=136, Invalid=620, Unknown=0, NotChecked=0, Total=756 [2021-11-20 06:57:57,642 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 29 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:57:57,642 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 199 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 160 Invalid, 0 Unknown, 34 Unchecked, 0.2s Time] [2021-11-20 06:57:57,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-11-20 06:57:57,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 64. [2021-11-20 06:57:57,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 54 states have (on average 1.2222222222222223) internal successors, (66), 54 states have internal predecessors, (66), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-20 06:57:57,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 78 transitions. [2021-11-20 06:57:57,662 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 78 transitions. Word has length 29 [2021-11-20 06:57:57,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:57:57,662 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 78 transitions. [2021-11-20 06:57:57,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 20 states have internal predecessors, (40), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 06:57:57,663 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 78 transitions. [2021-11-20 06:57:57,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-20 06:57:57,664 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:57:57,664 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:57:57,704 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-20 06:57:57,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-20 06:57:57,889 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:57:57,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:57:57,890 INFO L85 PathProgramCache]: Analyzing trace with hash -118038533, now seen corresponding path program 2 times [2021-11-20 06:57:57,890 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:57:57,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072305006] [2021-11-20 06:57:57,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:57:57,891 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:57:57,916 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:57:57,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2141322653] [2021-11-20 06:57:57,916 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:57:57,916 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:57:57,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:57:57,927 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:57:57,949 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-20 06:57:57,988 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 06:57:57,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:57:57,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 06:57:57,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:57:58,113 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:57:58,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:57:58,220 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 06:57:58,220 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:57:58,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072305006] [2021-11-20 06:57:58,220 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:57:58,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141322653] [2021-11-20 06:57:58,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141322653] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:57:58,221 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:57:58,221 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-11-20 06:57:58,221 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459374078] [2021-11-20 06:57:58,222 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:57:58,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 06:57:58,223 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:57:58,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 06:57:58,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-20 06:57:58,224 INFO L87 Difference]: Start difference. First operand 64 states and 78 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-20 06:57:58,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:57:58,652 INFO L93 Difference]: Finished difference Result 91 states and 105 transitions. [2021-11-20 06:57:58,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-20 06:57:58,653 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2021-11-20 06:57:58,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:57:58,654 INFO L225 Difference]: With dead ends: 91 [2021-11-20 06:57:58,654 INFO L226 Difference]: Without dead ends: 81 [2021-11-20 06:57:58,654 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-11-20 06:57:58,655 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 79 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:57:58,655 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 99 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-20 06:57:58,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-11-20 06:57:58,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 65. [2021-11-20 06:57:58,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 55 states have (on average 1.2) internal successors, (66), 55 states have internal predecessors, (66), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-20 06:57:58,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 78 transitions. [2021-11-20 06:57:58,665 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 78 transitions. Word has length 31 [2021-11-20 06:57:58,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:57:58,665 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 78 transitions. [2021-11-20 06:57:58,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-20 06:57:58,666 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 78 transitions. [2021-11-20 06:57:58,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-20 06:57:58,667 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:57:58,667 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:57:58,697 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-11-20 06:57:58,881 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:57:58,881 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:57:58,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:57:58,882 INFO L85 PathProgramCache]: Analyzing trace with hash 256298297, now seen corresponding path program 2 times [2021-11-20 06:57:58,882 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:57:58,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184785124] [2021-11-20 06:57:58,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:57:58,882 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:57:58,894 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:57:58,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1209203279] [2021-11-20 06:57:58,894 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:57:58,894 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:57:58,895 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:57:58,896 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:57:58,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-20 06:57:58,949 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 06:57:58,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:57:58,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 06:57:58,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:57:59,087 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:57:59,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:57:59,160 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 06:57:59,161 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:57:59,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184785124] [2021-11-20 06:57:59,161 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:57:59,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209203279] [2021-11-20 06:57:59,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209203279] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:57:59,161 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:57:59,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-11-20 06:57:59,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257486970] [2021-11-20 06:57:59,162 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:57:59,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 06:57:59,162 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:57:59,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 06:57:59,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-20 06:57:59,163 INFO L87 Difference]: Start difference. First operand 65 states and 78 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-20 06:57:59,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:57:59,506 INFO L93 Difference]: Finished difference Result 82 states and 93 transitions. [2021-11-20 06:57:59,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-20 06:57:59,507 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2021-11-20 06:57:59,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:57:59,508 INFO L225 Difference]: With dead ends: 82 [2021-11-20 06:57:59,508 INFO L226 Difference]: Without dead ends: 78 [2021-11-20 06:57:59,508 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-11-20 06:57:59,509 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 56 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:57:59,509 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 107 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 06:57:59,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-11-20 06:57:59,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 71. [2021-11-20 06:57:59,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 60 states have (on average 1.1833333333333333) internal successors, (71), 60 states have internal predecessors, (71), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-20 06:57:59,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 83 transitions. [2021-11-20 06:57:59,518 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 83 transitions. Word has length 31 [2021-11-20 06:57:59,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:57:59,518 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 83 transitions. [2021-11-20 06:57:59,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-20 06:57:59,518 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 83 transitions. [2021-11-20 06:57:59,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-20 06:57:59,520 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:57:59,520 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:57:59,559 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-20 06:57:59,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:57:59,720 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:57:59,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:57:59,721 INFO L85 PathProgramCache]: Analyzing trace with hash 1542761403, now seen corresponding path program 3 times [2021-11-20 06:57:59,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:57:59,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072313242] [2021-11-20 06:57:59,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:57:59,722 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:57:59,755 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:57:59,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1891737051] [2021-11-20 06:57:59,756 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 06:57:59,756 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:57:59,756 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:57:59,762 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:57:59,781 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-20 06:57:59,832 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-20 06:57:59,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:57:59,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-20 06:57:59,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:57:59,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-20 06:57:59,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-11-20 06:57:59,974 INFO L354 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2021-11-20 06:57:59,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 54 treesize of output 43 [2021-11-20 06:58:06,273 INFO L354 Elim1Store]: treesize reduction 750, result has 17.5 percent of original size [2021-11-20 06:58:06,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 2 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 32 case distinctions, treesize of input 155 treesize of output 249 [2021-11-20 07:00:49,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:00:49,853 INFO L354 Elim1Store]: treesize reduction 684, result has 17.9 percent of original size [2021-11-20 07:00:49,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 1 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 234 treesize of output 310 [2021-11-20 07:00:50,658 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:00:50,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:00:55,902 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:00:55,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072313242] [2021-11-20 07:00:55,902 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:00:55,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891737051] [2021-11-20 07:00:55,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891737051] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:00:55,902 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:00:55,902 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-11-20 07:00:55,903 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425855974] [2021-11-20 07:00:55,903 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 07:00:55,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-20 07:00:55,903 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:00:55,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-20 07:00:55,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=570, Unknown=7, NotChecked=0, Total=702 [2021-11-20 07:00:55,905 INFO L87 Difference]: Start difference. First operand 71 states and 83 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 17 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 07:00:56,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:00:56,891 INFO L93 Difference]: Finished difference Result 94 states and 110 transitions. [2021-11-20 07:00:56,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-20 07:00:56,891 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 17 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 33 [2021-11-20 07:00:56,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:00:56,892 INFO L225 Difference]: With dead ends: 94 [2021-11-20 07:00:56,892 INFO L226 Difference]: Without dead ends: 90 [2021-11-20 07:00:56,893 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=152, Invalid=710, Unknown=8, NotChecked=0, Total=870 [2021-11-20 07:00:56,894 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 17 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 77 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:00:56,895 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 201 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 77 Unchecked, 0.1s Time] [2021-11-20 07:00:56,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-11-20 07:00:56,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 84. [2021-11-20 07:00:56,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 71 states have (on average 1.1830985915492958) internal successors, (84), 71 states have internal predecessors, (84), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-20 07:00:56,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 98 transitions. [2021-11-20 07:00:56,906 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 98 transitions. Word has length 33 [2021-11-20 07:00:56,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:00:56,907 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 98 transitions. [2021-11-20 07:00:56,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 17 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 07:00:56,907 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 98 transitions. [2021-11-20 07:00:56,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-20 07:00:56,909 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:00:56,909 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:00:56,934 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-11-20 07:00:57,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-11-20 07:00:57,116 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:00:57,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:00:57,117 INFO L85 PathProgramCache]: Analyzing trace with hash 2129567417, now seen corresponding path program 3 times [2021-11-20 07:00:57,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:00:57,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548140563] [2021-11-20 07:00:57,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:00:57,117 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:00:57,128 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:00:57,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1357849186] [2021-11-20 07:00:57,128 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 07:00:57,128 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:00:57,128 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:00:57,131 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:00:57,143 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-20 07:00:57,204 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-20 07:00:57,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:00:57,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-20 07:00:57,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:00:57,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-20 07:00:57,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2021-11-20 07:01:00,603 INFO L354 Elim1Store]: treesize reduction 56, result has 41.1 percent of original size [2021-11-20 07:01:00,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 80 treesize of output 85 [2021-11-20 07:01:05,615 INFO L354 Elim1Store]: treesize reduction 182, result has 5.7 percent of original size [2021-11-20 07:01:05,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 90 treesize of output 64 [2021-11-20 07:01:05,820 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:01:05,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:01:12,795 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:01:12,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548140563] [2021-11-20 07:01:12,795 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:01:12,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357849186] [2021-11-20 07:01:12,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357849186] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:01:12,795 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:01:12,796 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-11-20 07:01:12,796 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516937076] [2021-11-20 07:01:12,796 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 07:01:12,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-20 07:01:12,797 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:01:12,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-20 07:01:12,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=567, Unknown=4, NotChecked=0, Total=702 [2021-11-20 07:01:12,798 INFO L87 Difference]: Start difference. First operand 84 states and 98 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 17 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 07:01:13,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:01:13,221 INFO L93 Difference]: Finished difference Result 111 states and 130 transitions. [2021-11-20 07:01:13,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-20 07:01:13,224 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 17 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 33 [2021-11-20 07:01:13,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:01:13,225 INFO L225 Difference]: With dead ends: 111 [2021-11-20 07:01:13,225 INFO L226 Difference]: Without dead ends: 107 [2021-11-20 07:01:13,226 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=163, Invalid=763, Unknown=4, NotChecked=0, Total=930 [2021-11-20 07:01:13,227 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 22 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 140 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:01:13,227 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 187 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 46 Invalid, 0 Unknown, 140 Unchecked, 0.1s Time] [2021-11-20 07:01:13,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-11-20 07:01:13,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 94. [2021-11-20 07:01:13,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 79 states have (on average 1.1898734177215189) internal successors, (94), 79 states have internal predecessors, (94), 8 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-20 07:01:13,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 110 transitions. [2021-11-20 07:01:13,245 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 110 transitions. Word has length 33 [2021-11-20 07:01:13,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:01:13,245 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 110 transitions. [2021-11-20 07:01:13,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 17 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 07:01:13,246 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 110 transitions. [2021-11-20 07:01:13,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-20 07:01:13,252 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:01:13,253 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:01:13,290 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-20 07:01:13,465 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-20 07:01:13,465 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:01:13,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:01:13,466 INFO L85 PathProgramCache]: Analyzing trace with hash 883225021, now seen corresponding path program 4 times [2021-11-20 07:01:13,466 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:01:13,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823963886] [2021-11-20 07:01:13,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:01:13,466 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:01:13,479 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:01:13,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1228796277] [2021-11-20 07:01:13,480 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 07:01:13,480 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:01:13,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:01:13,481 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:01:13,498 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-20 07:01:13,565 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 07:01:13,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:01:13,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-20 07:01:13,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:01:13,676 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:01:13,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:01:13,758 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 07:01:13,759 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:01:13,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823963886] [2021-11-20 07:01:13,759 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:01:13,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228796277] [2021-11-20 07:01:13,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228796277] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:01:13,759 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:01:13,760 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-11-20 07:01:13,760 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495868567] [2021-11-20 07:01:13,760 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:01:13,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-20 07:01:13,760 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:01:13,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-20 07:01:13,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-11-20 07:01:13,761 INFO L87 Difference]: Start difference. First operand 94 states and 110 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-20 07:01:14,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:01:14,277 INFO L93 Difference]: Finished difference Result 217 states and 260 transitions. [2021-11-20 07:01:14,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-20 07:01:14,278 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 35 [2021-11-20 07:01:14,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:01:14,279 INFO L225 Difference]: With dead ends: 217 [2021-11-20 07:01:14,279 INFO L226 Difference]: Without dead ends: 165 [2021-11-20 07:01:14,280 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2021-11-20 07:01:14,281 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 141 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 07:01:14,281 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 129 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-20 07:01:14,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-11-20 07:01:14,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 134. [2021-11-20 07:01:14,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 113 states have (on average 1.2212389380530972) internal successors, (138), 113 states have internal predecessors, (138), 13 states have call successors, (13), 7 states have call predecessors, (13), 7 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-11-20 07:01:14,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 164 transitions. [2021-11-20 07:01:14,302 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 164 transitions. Word has length 35 [2021-11-20 07:01:14,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:01:14,302 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 164 transitions. [2021-11-20 07:01:14,302 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-20 07:01:14,303 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 164 transitions. [2021-11-20 07:01:14,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-20 07:01:14,304 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:01:14,304 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:01:14,333 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-11-20 07:01:14,517 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-20 07:01:14,517 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:01:14,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:01:14,518 INFO L85 PathProgramCache]: Analyzing trace with hash 1710335479, now seen corresponding path program 4 times [2021-11-20 07:01:14,518 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:01:14,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090977088] [2021-11-20 07:01:14,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:01:14,519 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:01:14,555 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:01:14,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1829702548] [2021-11-20 07:01:14,556 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 07:01:14,556 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:01:14,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:01:14,557 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:01:14,574 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-20 07:01:14,646 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 07:01:14,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:01:14,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-20 07:01:14,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:01:14,765 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:01:14,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:01:14,850 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 07:01:14,850 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:01:14,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090977088] [2021-11-20 07:01:14,850 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:01:14,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829702548] [2021-11-20 07:01:14,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829702548] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:01:14,850 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:01:14,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-11-20 07:01:14,851 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922074685] [2021-11-20 07:01:14,851 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:01:14,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-20 07:01:14,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:01:14,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-20 07:01:14,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-11-20 07:01:14,853 INFO L87 Difference]: Start difference. First operand 134 states and 164 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-20 07:01:15,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:01:15,554 INFO L93 Difference]: Finished difference Result 160 states and 188 transitions. [2021-11-20 07:01:15,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-20 07:01:15,555 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 35 [2021-11-20 07:01:15,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:01:15,556 INFO L225 Difference]: With dead ends: 160 [2021-11-20 07:01:15,556 INFO L226 Difference]: Without dead ends: 156 [2021-11-20 07:01:15,557 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2021-11-20 07:01:15,558 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 94 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-20 07:01:15,558 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 142 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-20 07:01:15,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-11-20 07:01:15,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 129. [2021-11-20 07:01:15,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 108 states have (on average 1.212962962962963) internal successors, (131), 109 states have internal predecessors, (131), 13 states have call successors, (13), 7 states have call predecessors, (13), 7 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2021-11-20 07:01:15,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 157 transitions. [2021-11-20 07:01:15,577 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 157 transitions. Word has length 35 [2021-11-20 07:01:15,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:01:15,577 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 157 transitions. [2021-11-20 07:01:15,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-20 07:01:15,577 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 157 transitions. [2021-11-20 07:01:15,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-20 07:01:15,579 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:01:15,579 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:01:15,612 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-20 07:01:15,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-20 07:01:15,796 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:01:15,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:01:15,796 INFO L85 PathProgramCache]: Analyzing trace with hash 1728258427, now seen corresponding path program 5 times [2021-11-20 07:01:15,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:01:15,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735643760] [2021-11-20 07:01:15,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:01:15,797 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:01:15,808 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:01:15,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [315038435] [2021-11-20 07:01:15,808 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-20 07:01:15,808 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:01:15,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:01:15,825 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:01:15,829 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-20 07:01:15,888 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-11-20 07:01:15,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:01:15,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 45 conjunts are in the unsatisfiable core [2021-11-20 07:01:15,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:01:15,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-20 07:01:15,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2021-11-20 07:01:16,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:16,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:16,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 43 [2021-11-20 07:01:16,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:16,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:16,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:16,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:16,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:16,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:16,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 67 [2021-11-20 07:01:16,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:16,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:16,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:16,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:16,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:16,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:16,980 INFO L354 Elim1Store]: treesize reduction 222, result has 12.9 percent of original size [2021-11-20 07:01:16,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 123 treesize of output 103 [2021-11-20 07:01:19,041 INFO L354 Elim1Store]: treesize reduction 128, result has 16.3 percent of original size [2021-11-20 07:01:19,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 90 treesize of output 70 [2021-11-20 07:01:19,099 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:01:19,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:01:29,864 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:01:29,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735643760] [2021-11-20 07:01:29,864 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:01:29,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315038435] [2021-11-20 07:01:29,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315038435] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:01:29,865 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:01:29,865 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2021-11-20 07:01:29,865 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77418705] [2021-11-20 07:01:29,865 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 07:01:29,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-20 07:01:29,865 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:01:29,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-20 07:01:29,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=684, Unknown=2, NotChecked=0, Total=812 [2021-11-20 07:01:29,867 INFO L87 Difference]: Start difference. First operand 129 states and 157 transitions. Second operand has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 19 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 07:01:30,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:01:30,569 INFO L93 Difference]: Finished difference Result 161 states and 194 transitions. [2021-11-20 07:01:30,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-20 07:01:30,569 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 19 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 37 [2021-11-20 07:01:30,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:01:30,571 INFO L225 Difference]: With dead ends: 161 [2021-11-20 07:01:30,571 INFO L226 Difference]: Without dead ends: 157 [2021-11-20 07:01:30,572 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=157, Invalid=897, Unknown=2, NotChecked=0, Total=1056 [2021-11-20 07:01:30,573 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 32 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 210 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 07:01:30,574 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 246 Invalid, 460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 230 Invalid, 0 Unknown, 210 Unchecked, 0.4s Time] [2021-11-20 07:01:30,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-11-20 07:01:30,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 145. [2021-11-20 07:01:30,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 122 states have (on average 1.2131147540983607) internal successors, (148), 123 states have internal predecessors, (148), 14 states have call successors, (14), 8 states have call predecessors, (14), 8 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2021-11-20 07:01:30,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 176 transitions. [2021-11-20 07:01:30,591 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 176 transitions. Word has length 37 [2021-11-20 07:01:30,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:01:30,592 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 176 transitions. [2021-11-20 07:01:30,592 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 19 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 07:01:30,592 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 176 transitions. [2021-11-20 07:01:30,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-20 07:01:30,593 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:01:30,594 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:01:30,621 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-20 07:01:30,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-20 07:01:30,803 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:01:30,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:01:30,803 INFO L85 PathProgramCache]: Analyzing trace with hash -1286845191, now seen corresponding path program 5 times [2021-11-20 07:01:30,803 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:01:30,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782139259] [2021-11-20 07:01:30,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:01:30,804 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:01:30,819 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:01:30,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [229688300] [2021-11-20 07:01:30,819 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-20 07:01:30,819 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:01:30,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:01:30,820 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:01:30,828 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-20 07:01:30,894 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-11-20 07:01:30,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:01:30,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-20 07:01:30,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:01:30,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-20 07:01:30,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2021-11-20 07:01:31,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:31,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:31,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 43 [2021-11-20 07:01:31,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:31,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:31,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:31,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:31,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:31,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:31,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 63 [2021-11-20 07:01:34,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:34,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:34,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:34,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:34,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:34,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:34,514 INFO L354 Elim1Store]: treesize reduction 144, result has 34.2 percent of original size [2021-11-20 07:01:34,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 90 treesize of output 115 [2021-11-20 07:01:36,408 INFO L354 Elim1Store]: treesize reduction 132, result has 25.4 percent of original size [2021-11-20 07:01:36,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 3 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 100 treesize of output 100 [2021-11-20 07:01:36,483 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:01:36,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:01:39,173 WARN L838 $PredicateComparison]: unable to prove that (forall ((|aux_div_ULTIMATE.start_main_~index~0#1_40| Int)) (= (let ((.cse3 (* |aux_div_ULTIMATE.start_main_~index~0#1_40| 8)) (.cse4 (* |c_ULTIMATE.start_main_~count~0#1| |c_ULTIMATE.start_main_~num~0#1|))) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base|) (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| .cse3) (* |c_ULTIMATE.start_main_~num~0#1| .cse4))))) (let ((.cse1 (store (select .cse2 |c_ULTIMATE.start_main_~#array2~0#1.base|) (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse3) .cse4))) (let ((.cse0 (select (store .cse2 |c_ULTIMATE.start_main_~#array2~0#1.base| .cse1) |c_ULTIMATE.start_main_~#array1~0#1.base|))) (+ (select .cse0 |c_ULTIMATE.start_main_~#array1~0#1.offset|) (select .cse1 |c_ULTIMATE.start_main_~#array2~0#1.offset|) (select .cse1 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| 4)) |c_ULTIMATE.start_main_~sum~0#1| (select .cse0 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| 8)) (select .cse1 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| 8)) (select .cse0 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| 4))))))) 0)) is different from false [2021-11-20 07:01:39,210 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:01:39,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782139259] [2021-11-20 07:01:39,210 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:01:39,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229688300] [2021-11-20 07:01:39,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229688300] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:01:39,211 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:01:39,211 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-11-20 07:01:39,211 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169680785] [2021-11-20 07:01:39,211 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 07:01:39,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-20 07:01:39,212 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:01:39,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-20 07:01:39,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=377, Unknown=5, NotChecked=40, Total=506 [2021-11-20 07:01:39,213 INFO L87 Difference]: Start difference. First operand 145 states and 176 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 07:01:39,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:01:39,794 INFO L93 Difference]: Finished difference Result 188 states and 232 transitions. [2021-11-20 07:01:39,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-20 07:01:39,794 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 37 [2021-11-20 07:01:39,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:01:39,796 INFO L225 Difference]: With dead ends: 188 [2021-11-20 07:01:39,796 INFO L226 Difference]: Without dead ends: 184 [2021-11-20 07:01:39,797 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=96, Invalid=455, Unknown=5, NotChecked=44, Total=600 [2021-11-20 07:01:39,798 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 28 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 177 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 07:01:39,798 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 241 Invalid, 363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 171 Invalid, 0 Unknown, 177 Unchecked, 0.5s Time] [2021-11-20 07:01:39,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-11-20 07:01:39,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 146. [2021-11-20 07:01:39,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 123 states have (on average 1.2195121951219512) internal successors, (150), 123 states have internal predecessors, (150), 14 states have call successors, (14), 8 states have call predecessors, (14), 8 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-11-20 07:01:39,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 178 transitions. [2021-11-20 07:01:39,823 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 178 transitions. Word has length 37 [2021-11-20 07:01:39,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:01:39,823 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 178 transitions. [2021-11-20 07:01:39,823 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 07:01:39,823 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 178 transitions. [2021-11-20 07:01:39,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-20 07:01:39,825 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:01:39,825 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:01:39,859 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-20 07:01:40,041 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:01:40,041 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:01:40,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:01:40,042 INFO L85 PathProgramCache]: Analyzing trace with hash 1972265606, now seen corresponding path program 1 times [2021-11-20 07:01:40,042 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:01:40,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637402551] [2021-11-20 07:01:40,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:01:40,042 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:01:40,048 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:01:40,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2016920862] [2021-11-20 07:01:40,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:01:40,048 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:01:40,049 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:01:40,054 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:01:40,060 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-20 07:01:40,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:01:40,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-20 07:01:40,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:01:40,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-20 07:01:40,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 31 [2021-11-20 07:01:40,571 INFO L354 Elim1Store]: treesize reduction 82, result has 7.9 percent of original size [2021-11-20 07:01:40,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 27 [2021-11-20 07:01:40,616 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-20 07:01:40,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:01:40,930 INFO L354 Elim1Store]: treesize reduction 23, result has 57.4 percent of original size [2021-11-20 07:01:40,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 454 treesize of output 348 [2021-11-20 07:01:40,975 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 07:01:40,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 348 treesize of output 336 [2021-11-20 07:01:41,116 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 07:01:41,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2021-11-20 07:01:41,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-11-20 07:01:46,405 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 07:01:46,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 178 treesize of output 188 [2021-11-20 07:01:47,439 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:01:47,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637402551] [2021-11-20 07:01:47,440 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:01:47,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016920862] [2021-11-20 07:01:47,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016920862] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:01:47,440 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:01:47,440 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-11-20 07:01:47,441 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516712059] [2021-11-20 07:01:47,441 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 07:01:47,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-20 07:01:47,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:01:47,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-20 07:01:47,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-11-20 07:01:47,443 INFO L87 Difference]: Start difference. First operand 146 states and 178 transitions. Second operand has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 12 states have internal predecessors, (32), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-20 07:01:47,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:01:47,891 INFO L93 Difference]: Finished difference Result 156 states and 187 transitions. [2021-11-20 07:01:47,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-20 07:01:47,891 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 12 states have internal predecessors, (32), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 39 [2021-11-20 07:01:47,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:01:47,892 INFO L225 Difference]: With dead ends: 156 [2021-11-20 07:01:47,892 INFO L226 Difference]: Without dead ends: 113 [2021-11-20 07:01:47,893 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=155, Invalid=547, Unknown=0, NotChecked=0, Total=702 [2021-11-20 07:01:47,894 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 48 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 74 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:01:47,895 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 202 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 72 Invalid, 0 Unknown, 74 Unchecked, 0.1s Time] [2021-11-20 07:01:47,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-11-20 07:01:47,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 112. [2021-11-20 07:01:47,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 95 states have (on average 1.231578947368421) internal successors, (117), 95 states have internal predecessors, (117), 10 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-20 07:01:47,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 137 transitions. [2021-11-20 07:01:47,915 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 137 transitions. Word has length 39 [2021-11-20 07:01:47,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:01:47,915 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 137 transitions. [2021-11-20 07:01:47,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 12 states have internal predecessors, (32), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-20 07:01:47,915 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 137 transitions. [2021-11-20 07:01:47,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-20 07:01:47,916 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:01:47,916 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:01:47,953 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-20 07:01:48,137 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:01:48,137 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:01:48,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:01:48,138 INFO L85 PathProgramCache]: Analyzing trace with hash -1242761347, now seen corresponding path program 6 times [2021-11-20 07:01:48,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:01:48,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784065385] [2021-11-20 07:01:48,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:01:48,138 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:01:48,147 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:01:48,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1303081914] [2021-11-20 07:01:48,148 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-20 07:01:48,148 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:01:48,148 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:01:48,150 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:01:48,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-20 07:01:48,215 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-11-20 07:01:48,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:01:48,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-20 07:01:48,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:01:48,352 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 20 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:01:48,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:01:48,467 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 07:01:48,468 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:01:48,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784065385] [2021-11-20 07:01:48,468 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:01:48,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303081914] [2021-11-20 07:01:48,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303081914] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:01:48,469 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:01:48,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-11-20 07:01:48,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881875277] [2021-11-20 07:01:48,470 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:01:48,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-20 07:01:48,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:01:48,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-20 07:01:48,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-11-20 07:01:48,471 INFO L87 Difference]: Start difference. First operand 112 states and 137 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-20 07:01:49,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:01:49,401 INFO L93 Difference]: Finished difference Result 271 states and 337 transitions. [2021-11-20 07:01:49,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-20 07:01:49,402 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 39 [2021-11-20 07:01:49,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:01:49,404 INFO L225 Difference]: With dead ends: 271 [2021-11-20 07:01:49,404 INFO L226 Difference]: Without dead ends: 201 [2021-11-20 07:01:49,405 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=147, Invalid=359, Unknown=0, NotChecked=0, Total=506 [2021-11-20 07:01:49,405 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 169 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-20 07:01:49,406 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 220 Invalid, 328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-20 07:01:49,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-11-20 07:01:49,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 158. [2021-11-20 07:01:49,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 134 states have (on average 1.2611940298507462) internal successors, (169), 134 states have internal predecessors, (169), 16 states have call successors, (16), 7 states have call predecessors, (16), 7 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-20 07:01:49,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 201 transitions. [2021-11-20 07:01:49,433 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 201 transitions. Word has length 39 [2021-11-20 07:01:49,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:01:49,433 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 201 transitions. [2021-11-20 07:01:49,433 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-20 07:01:49,434 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 201 transitions. [2021-11-20 07:01:49,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-20 07:01:49,434 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:01:49,435 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:01:49,473 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-20 07:01:49,661 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-20 07:01:49,661 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:01:49,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:01:49,662 INFO L85 PathProgramCache]: Analyzing trace with hash 2056542649, now seen corresponding path program 7 times [2021-11-20 07:01:49,662 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:01:49,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844188010] [2021-11-20 07:01:49,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:01:49,662 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:01:49,671 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:01:49,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [679372255] [2021-11-20 07:01:49,671 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-20 07:01:49,671 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:01:49,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:01:49,677 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:01:49,678 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-20 07:01:49,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:01:49,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-20 07:01:49,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:01:49,873 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 13 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:01:49,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:01:49,987 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 07:01:49,987 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:01:49,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844188010] [2021-11-20 07:01:49,987 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:01:49,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679372255] [2021-11-20 07:01:49,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679372255] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:01:49,987 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:01:49,988 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-11-20 07:01:49,988 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736655954] [2021-11-20 07:01:49,988 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:01:49,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-20 07:01:49,988 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:01:49,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-20 07:01:49,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-11-20 07:01:49,989 INFO L87 Difference]: Start difference. First operand 158 states and 201 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-20 07:01:50,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:01:50,861 INFO L93 Difference]: Finished difference Result 191 states and 232 transitions. [2021-11-20 07:01:50,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-20 07:01:50,861 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 39 [2021-11-20 07:01:50,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:01:50,863 INFO L225 Difference]: With dead ends: 191 [2021-11-20 07:01:50,863 INFO L226 Difference]: Without dead ends: 187 [2021-11-20 07:01:50,864 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=149, Invalid=403, Unknown=0, NotChecked=0, Total=552 [2021-11-20 07:01:50,864 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 83 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 421 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-20 07:01:50,865 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 273 Invalid, 477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 421 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-20 07:01:50,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-11-20 07:01:50,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 153. [2021-11-20 07:01:50,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 129 states have (on average 1.255813953488372) internal successors, (162), 130 states have internal predecessors, (162), 16 states have call successors, (16), 7 states have call predecessors, (16), 7 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-20 07:01:50,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 194 transitions. [2021-11-20 07:01:50,892 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 194 transitions. Word has length 39 [2021-11-20 07:01:50,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:01:50,892 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 194 transitions. [2021-11-20 07:01:50,893 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-20 07:01:50,893 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 194 transitions. [2021-11-20 07:01:50,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-20 07:01:50,894 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:01:50,894 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:01:50,916 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-20 07:01:51,101 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-20 07:01:51,101 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:01:51,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:01:51,102 INFO L85 PathProgramCache]: Analyzing trace with hash 705763387, now seen corresponding path program 8 times [2021-11-20 07:01:51,102 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:01:51,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376403062] [2021-11-20 07:01:51,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:01:51,102 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:01:51,109 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:01:51,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1220714244] [2021-11-20 07:01:51,110 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 07:01:51,110 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:01:51,110 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:01:51,111 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:01:51,116 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-20 07:01:51,173 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 07:01:51,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:01:51,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 52 conjunts are in the unsatisfiable core [2021-11-20 07:01:51,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:01:51,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-20 07:01:51,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2021-11-20 07:01:51,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:51,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:51,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 53 [2021-11-20 07:01:51,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:51,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:51,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:51,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:51,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:51,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:51,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 83 [2021-11-20 07:01:51,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:51,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:51,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:51,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:51,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:51,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:51,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:51,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:51,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:51,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:51,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:51,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:51,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 13 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 113 [2021-11-20 07:01:52,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:52,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:52,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:52,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:52,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:52,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:52,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:52,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:52,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:52,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:52,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:52,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:53,053 INFO L354 Elim1Store]: treesize reduction 236, result has 31.6 percent of original size [2021-11-20 07:01:53,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 14 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 8 case distinctions, treesize of input 141 treesize of output 185 [2021-11-20 07:02:06,415 INFO L354 Elim1Store]: treesize reduction 216, result has 27.3 percent of original size [2021-11-20 07:02:06,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 6 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 158 treesize of output 178 [2021-11-20 07:02:06,529 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 4 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:02:06,529 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:02:23,407 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:02:23,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376403062] [2021-11-20 07:02:23,408 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:02:23,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220714244] [2021-11-20 07:02:23,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220714244] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:02:23,408 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:02:23,408 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2021-11-20 07:02:23,408 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502925593] [2021-11-20 07:02:23,408 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 07:02:23,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-20 07:02:23,409 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:02:23,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-20 07:02:23,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=965, Unknown=3, NotChecked=0, Total=1122 [2021-11-20 07:02:23,411 INFO L87 Difference]: Start difference. First operand 153 states and 194 transitions. Second operand has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 22 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 07:02:24,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:02:24,333 INFO L93 Difference]: Finished difference Result 214 states and 272 transitions. [2021-11-20 07:02:24,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-20 07:02:24,334 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 22 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 41 [2021-11-20 07:02:24,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:02:24,336 INFO L225 Difference]: With dead ends: 214 [2021-11-20 07:02:24,337 INFO L226 Difference]: Without dead ends: 210 [2021-11-20 07:02:24,338 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 18.3s TimeCoverageRelationStatistics Valid=187, Invalid=1216, Unknown=3, NotChecked=0, Total=1406 [2021-11-20 07:02:24,338 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 45 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 166 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-20 07:02:24,339 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 172 Invalid, 413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 219 Invalid, 0 Unknown, 166 Unchecked, 0.6s Time] [2021-11-20 07:02:24,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-11-20 07:02:24,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 169. [2021-11-20 07:02:24,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 143 states have (on average 1.2517482517482517) internal successors, (179), 144 states have internal predecessors, (179), 17 states have call successors, (17), 8 states have call predecessors, (17), 8 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2021-11-20 07:02:24,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 213 transitions. [2021-11-20 07:02:24,373 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 213 transitions. Word has length 41 [2021-11-20 07:02:24,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:02:24,374 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 213 transitions. [2021-11-20 07:02:24,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 22 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 07:02:24,374 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 213 transitions. [2021-11-20 07:02:24,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-20 07:02:24,375 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:02:24,375 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:02:24,411 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-20 07:02:24,601 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-20 07:02:24,601 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:02:24,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:02:24,602 INFO L85 PathProgramCache]: Analyzing trace with hash -2000856007, now seen corresponding path program 6 times [2021-11-20 07:02:24,602 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:02:24,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416421202] [2021-11-20 07:02:24,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:02:24,602 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:02:24,611 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:02:24,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2112368940] [2021-11-20 07:02:24,613 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-20 07:02:24,613 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:02:24,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:02:24,615 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:02:24,621 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-20 07:02:24,707 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-11-20 07:02:24,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:02:24,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 55 conjunts are in the unsatisfiable core [2021-11-20 07:02:24,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:02:24,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-20 07:02:24,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2021-11-20 07:02:24,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:02:24,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:02:24,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 53 [2021-11-20 07:02:25,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:02:25,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:02:25,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:02:25,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:02:25,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:02:25,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:02:25,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 83 [2021-11-20 07:02:25,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:02:25,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:02:25,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:02:25,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:02:25,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:02:25,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:02:25,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:02:25,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:02:25,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:02:25,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:02:25,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:02:25,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:02:25,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 13 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 87 [2021-11-20 07:02:30,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:02:30,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:02:30,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:02:30,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:02:30,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:02:30,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:02:30,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:02:30,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:02:30,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:02:30,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:02:30,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:02:30,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:02:30,801 INFO L354 Elim1Store]: treesize reduction 204, result has 31.3 percent of original size [2021-11-20 07:02:30,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 14 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 8 case distinctions, treesize of input 118 treesize of output 149 [2021-11-20 07:02:34,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:02:34,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:02:34,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 07:02:34,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:02:34,329 INFO L354 Elim1Store]: treesize reduction 268, result has 16.0 percent of original size [2021-11-20 07:02:34,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 6 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 128 treesize of output 122 [2021-11-20 07:02:34,561 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 4 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:02:34,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:02:38,413 WARN L838 $PredicateComparison]: unable to prove that (forall ((|aux_div_ULTIMATE.start_main_~index~0#1_40| Int)) (let ((.cse0 (* 2 |aux_div_ULTIMATE.start_main_~index~0#1_40|))) (or (< .cse0 0) (= 0 (let ((.cse4 (* |aux_div_ULTIMATE.start_main_~index~0#1_40| 8)) (.cse5 (* |c_ULTIMATE.start_main_~count~0#1| |c_ULTIMATE.start_main_~num~0#1|))) (let ((.cse3 (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base|) (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| .cse4) (* |c_ULTIMATE.start_main_~num~0#1| .cse5))))) (let ((.cse2 (store (select .cse3 |c_ULTIMATE.start_main_~#array2~0#1.base|) (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse4) .cse5))) (let ((.cse1 (select (store .cse3 |c_ULTIMATE.start_main_~#array2~0#1.base| .cse2) |c_ULTIMATE.start_main_~#array1~0#1.base|))) (+ (select .cse1 |c_ULTIMATE.start_main_~#array1~0#1.offset|) (select .cse2 |c_ULTIMATE.start_main_~#array2~0#1.offset|) (select .cse2 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| 12)) (select .cse1 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| 12)) (select .cse2 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| 4)) |c_ULTIMATE.start_main_~sum~0#1| (select .cse1 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| 8)) (select .cse2 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| 8)) (select .cse1 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| 4)))))))) (<= 4 .cse0)))) is different from false [2021-11-20 07:02:38,421 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:02:38,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416421202] [2021-11-20 07:02:38,421 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:02:38,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112368940] [2021-11-20 07:02:38,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112368940] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:02:38,421 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:02:38,421 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2021-11-20 07:02:38,421 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061025732] [2021-11-20 07:02:38,421 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 07:02:38,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-20 07:02:38,422 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:02:38,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-20 07:02:38,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1064, Unknown=7, NotChecked=68, Total=1332 [2021-11-20 07:02:38,424 INFO L87 Difference]: Start difference. First operand 169 states and 213 transitions. Second operand has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 22 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 07:02:44,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:02:44,817 INFO L93 Difference]: Finished difference Result 219 states and 274 transitions. [2021-11-20 07:02:44,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-20 07:02:44,819 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 22 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 41 [2021-11-20 07:02:44,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:02:44,823 INFO L225 Difference]: With dead ends: 219 [2021-11-20 07:02:44,823 INFO L226 Difference]: Without dead ends: 215 [2021-11-20 07:02:44,825 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 15.0s TimeCoverageRelationStatistics Valid=314, Invalid=1839, Unknown=13, NotChecked=90, Total=2256 [2021-11-20 07:02:44,826 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 42 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 303 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-20 07:02:44,826 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 293 Invalid, 669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 326 Invalid, 0 Unknown, 303 Unchecked, 0.7s Time] [2021-11-20 07:02:44,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-11-20 07:02:44,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 170. [2021-11-20 07:02:44,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 144 states have (on average 1.2569444444444444) internal successors, (181), 144 states have internal predecessors, (181), 17 states have call successors, (17), 8 states have call predecessors, (17), 8 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-11-20 07:02:44,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 215 transitions. [2021-11-20 07:02:44,865 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 215 transitions. Word has length 41 [2021-11-20 07:02:44,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:02:44,866 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 215 transitions. [2021-11-20 07:02:44,866 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 22 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 07:02:44,867 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 215 transitions. [2021-11-20 07:02:44,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-20 07:02:44,868 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:02:44,868 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:02:44,910 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-20 07:02:45,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:02:45,081 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:02:45,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:02:45,082 INFO L85 PathProgramCache]: Analyzing trace with hash -1145812342, now seen corresponding path program 1 times [2021-11-20 07:02:45,082 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:02:45,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386941130] [2021-11-20 07:02:45,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:02:45,082 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:02:45,090 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:02:45,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [519453995] [2021-11-20 07:02:45,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:02:45,095 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:02:45,095 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:02:45,096 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:02:45,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-20 07:02:45,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:02:45,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 47 conjunts are in the unsatisfiable core [2021-11-20 07:02:45,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:02:45,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-20 07:02:45,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2021-11-20 07:02:45,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:02:45,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:02:45,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 53 [2021-11-20 07:02:46,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:02:46,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:02:46,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:02:46,187 INFO L354 Elim1Store]: treesize reduction 162, result has 8.5 percent of original size [2021-11-20 07:02:46,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 113 treesize of output 85 [2021-11-20 07:02:47,661 WARN L322 ript$VariableManager]: TermVariabe |aux_mod_ULTIMATE.start_main_~index~0#1_40| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:02:47,662 WARN L322 ript$VariableManager]: TermVariabe |aux_div_ULTIMATE.start_main_~index~0#1_40| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:02:48,225 INFO L354 Elim1Store]: treesize reduction 616, result has 6.9 percent of original size [2021-11-20 07:02:48,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 11 case distinctions, treesize of input 213 treesize of output 124 [2021-11-20 07:02:49,933 INFO L354 Elim1Store]: treesize reduction 132, result has 13.7 percent of original size [2021-11-20 07:02:49,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 96 treesize of output 80 [2021-11-20 07:02:50,022 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:02:50,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:03:06,710 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:03:06,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386941130] [2021-11-20 07:03:06,710 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:03:06,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519453995] [2021-11-20 07:03:06,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519453995] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:03:06,710 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:03:06,711 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2021-11-20 07:03:06,711 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298049024] [2021-11-20 07:03:06,711 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 07:03:06,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-20 07:03:06,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:03:06,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-20 07:03:06,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=730, Unknown=7, NotChecked=0, Total=870 [2021-11-20 07:03:06,712 INFO L87 Difference]: Start difference. First operand 170 states and 215 transitions. Second operand has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 20 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 07:03:07,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:03:07,016 INFO L93 Difference]: Finished difference Result 196 states and 244 transitions. [2021-11-20 07:03:07,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-20 07:03:07,017 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 20 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 43 [2021-11-20 07:03:07,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:03:07,018 INFO L225 Difference]: With dead ends: 196 [2021-11-20 07:03:07,019 INFO L226 Difference]: Without dead ends: 186 [2021-11-20 07:03:07,019 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 17.9s TimeCoverageRelationStatistics Valid=149, Invalid=836, Unknown=7, NotChecked=0, Total=992 [2021-11-20 07:03:07,020 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 23 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 244 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:03:07,021 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 309 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 82 Invalid, 0 Unknown, 244 Unchecked, 0.2s Time] [2021-11-20 07:03:07,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-11-20 07:03:07,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 183. [2021-11-20 07:03:07,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 155 states have (on average 1.2451612903225806) internal successors, (193), 155 states have internal predecessors, (193), 18 states have call successors, (18), 9 states have call predecessors, (18), 9 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-11-20 07:03:07,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 229 transitions. [2021-11-20 07:03:07,050 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 229 transitions. Word has length 43 [2021-11-20 07:03:07,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:03:07,050 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 229 transitions. [2021-11-20 07:03:07,051 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 20 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 07:03:07,051 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 229 transitions. [2021-11-20 07:03:07,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-20 07:03:07,051 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:03:07,051 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:03:07,075 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-20 07:03:07,252 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:03:07,252 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:03:07,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:03:07,252 INFO L85 PathProgramCache]: Analyzing trace with hash -559006328, now seen corresponding path program 1 times [2021-11-20 07:03:07,253 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:03:07,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750828762] [2021-11-20 07:03:07,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:03:07,253 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:03:07,266 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:03:07,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1295461940] [2021-11-20 07:03:07,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:03:07,267 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:03:07,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:03:07,268 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:03:07,272 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-20 07:03:07,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:03:07,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 47 conjunts are in the unsatisfiable core [2021-11-20 07:03:07,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:03:07,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-20 07:03:07,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2021-11-20 07:03:07,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:03:07,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:03:07,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 53 [2021-11-20 07:03:08,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:03:08,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:03:08,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:03:08,198 INFO L354 Elim1Store]: treesize reduction 162, result has 8.5 percent of original size [2021-11-20 07:03:08,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 113 treesize of output 85 [2021-11-20 07:03:09,421 WARN L322 ript$VariableManager]: TermVariabe |aux_mod_ULTIMATE.start_main_~index~0#1_40| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:03:09,421 WARN L322 ript$VariableManager]: TermVariabe |aux_div_ULTIMATE.start_main_~index~0#1_40| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:03:09,988 INFO L354 Elim1Store]: treesize reduction 299, result has 0.3 percent of original size [2021-11-20 07:03:09,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 159 treesize of output 1 [2021-11-20 07:03:10,010 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 07:03:10,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:03:27,770 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:03:27,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750828762] [2021-11-20 07:03:27,771 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:03:27,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295461940] [2021-11-20 07:03:27,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295461940] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:03:27,771 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:03:27,771 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-11-20 07:03:27,771 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896846751] [2021-11-20 07:03:27,771 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 07:03:27,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-20 07:03:27,771 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:03:27,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-20 07:03:27,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=583, Unknown=6, NotChecked=0, Total=702 [2021-11-20 07:03:27,773 INFO L87 Difference]: Start difference. First operand 183 states and 229 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 15 states have internal predecessors, (35), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 07:03:31,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:03:31,477 INFO L93 Difference]: Finished difference Result 221 states and 278 transitions. [2021-11-20 07:03:31,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-20 07:03:31,478 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 15 states have internal predecessors, (35), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 43 [2021-11-20 07:03:31,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:03:31,480 INFO L225 Difference]: With dead ends: 221 [2021-11-20 07:03:31,481 INFO L226 Difference]: Without dead ends: 183 [2021-11-20 07:03:31,482 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 21.8s TimeCoverageRelationStatistics Valid=134, Invalid=728, Unknown=8, NotChecked=0, Total=870 [2021-11-20 07:03:31,483 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 16 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 138 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:03:31,483 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 206 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 94 Invalid, 0 Unknown, 138 Unchecked, 0.2s Time] [2021-11-20 07:03:31,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-11-20 07:03:31,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 183. [2021-11-20 07:03:31,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 155 states have (on average 1.238709677419355) internal successors, (192), 155 states have internal predecessors, (192), 18 states have call successors, (18), 9 states have call predecessors, (18), 9 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-11-20 07:03:31,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 228 transitions. [2021-11-20 07:03:31,532 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 228 transitions. Word has length 43 [2021-11-20 07:03:31,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:03:31,533 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 228 transitions. [2021-11-20 07:03:31,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 15 states have internal predecessors, (35), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 07:03:31,533 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 228 transitions. [2021-11-20 07:03:31,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-20 07:03:31,534 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:03:31,534 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:03:31,569 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-20 07:03:31,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-11-20 07:03:31,748 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:03:31,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:03:31,749 INFO L85 PathProgramCache]: Analyzing trace with hash 659625992, now seen corresponding path program 2 times [2021-11-20 07:03:31,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:03:31,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826303372] [2021-11-20 07:03:31,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:03:31,749 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:03:31,756 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:03:31,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [786644174] [2021-11-20 07:03:31,756 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 07:03:31,756 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:03:31,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:03:31,773 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:03:31,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-20 07:03:31,836 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 07:03:31,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:03:31,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-20 07:03:31,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:03:31,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-20 07:03:32,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:03:32,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 39 [2021-11-20 07:03:37,202 WARN L322 ript$VariableManager]: TermVariabe |aux_div_ULTIMATE.start_main_~index~0#1_40| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:03:37,451 INFO L354 Elim1Store]: treesize reduction 90, result has 20.4 percent of original size [2021-11-20 07:03:37,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 168 treesize of output 104 [2021-11-20 07:03:38,387 INFO L354 Elim1Store]: treesize reduction 274, result has 4.5 percent of original size [2021-11-20 07:03:38,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 113 treesize of output 64 [2021-11-20 07:03:38,453 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:03:38,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:03:52,094 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:03:52,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826303372] [2021-11-20 07:03:52,094 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:03:52,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786644174] [2021-11-20 07:03:52,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786644174] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:03:52,094 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:03:52,094 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2021-11-20 07:03:52,094 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099302135] [2021-11-20 07:03:52,095 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 07:03:52,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-20 07:03:52,095 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:03:52,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-20 07:03:52,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=642, Unknown=6, NotChecked=0, Total=756 [2021-11-20 07:03:52,096 INFO L87 Difference]: Start difference. First operand 183 states and 228 transitions. Second operand has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 18 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 07:03:52,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:03:52,717 INFO L93 Difference]: Finished difference Result 248 states and 307 transitions. [2021-11-20 07:03:52,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-20 07:03:52,719 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 18 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 43 [2021-11-20 07:03:52,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:03:52,721 INFO L225 Difference]: With dead ends: 248 [2021-11-20 07:03:52,721 INFO L226 Difference]: Without dead ends: 238 [2021-11-20 07:03:52,722 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 18.5s TimeCoverageRelationStatistics Valid=167, Invalid=949, Unknown=6, NotChecked=0, Total=1122 [2021-11-20 07:03:52,723 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 79 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 395 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 07:03:52,723 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 411 Invalid, 579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 156 Invalid, 0 Unknown, 395 Unchecked, 0.3s Time] [2021-11-20 07:03:52,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-11-20 07:03:52,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 190. [2021-11-20 07:03:52,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 160 states have (on average 1.2375) internal successors, (198), 160 states have internal predecessors, (198), 19 states have call successors, (19), 10 states have call predecessors, (19), 10 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2021-11-20 07:03:52,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 236 transitions. [2021-11-20 07:03:52,756 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 236 transitions. Word has length 43 [2021-11-20 07:03:52,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:03:52,756 INFO L470 AbstractCegarLoop]: Abstraction has 190 states and 236 transitions. [2021-11-20 07:03:52,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 18 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 07:03:52,757 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 236 transitions. [2021-11-20 07:03:52,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-20 07:03:52,758 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:03:52,758 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:03:52,795 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-20 07:03:52,985 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:03:52,985 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:03:52,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:03:52,986 INFO L85 PathProgramCache]: Analyzing trace with hash 1246432006, now seen corresponding path program 2 times [2021-11-20 07:03:52,986 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:03:52,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802092657] [2021-11-20 07:03:52,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:03:52,986 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:03:52,993 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:03:52,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [699834242] [2021-11-20 07:03:52,993 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 07:03:52,993 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:03:52,994 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:03:52,994 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:03:52,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-20 07:03:53,063 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 07:03:53,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:03:53,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-20 07:03:53,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:03:53,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-20 07:03:53,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2021-11-20 07:03:53,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:03:53,744 INFO L354 Elim1Store]: treesize reduction 66, result has 22.4 percent of original size [2021-11-20 07:03:53,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 78 treesize of output 63 [2021-11-20 07:03:54,798 WARN L322 ript$VariableManager]: TermVariabe |aux_div_ULTIMATE.start_main_~index~0#1_40| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:03:55,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 07:03:55,175 INFO L354 Elim1Store]: treesize reduction 298, result has 9.1 percent of original size [2021-11-20 07:03:55,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 117 treesize of output 74 [2021-11-20 07:03:55,752 INFO L354 Elim1Store]: treesize reduction 61, result has 6.2 percent of original size [2021-11-20 07:03:55,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 66 treesize of output 36 [2021-11-20 07:03:55,804 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 14 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:03:55,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:04:11,707 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:04:11,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802092657] [2021-11-20 07:04:11,707 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:04:11,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699834242] [2021-11-20 07:04:11,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699834242] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:04:11,707 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:04:11,708 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2021-11-20 07:04:11,708 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905726799] [2021-11-20 07:04:11,708 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 07:04:11,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-20 07:04:11,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:04:11,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-20 07:04:11,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=687, Unknown=7, NotChecked=0, Total=812 [2021-11-20 07:04:11,709 INFO L87 Difference]: Start difference. First operand 190 states and 236 transitions. Second operand has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 19 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 07:04:17,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:04:17,300 INFO L93 Difference]: Finished difference Result 219 states and 270 transitions. [2021-11-20 07:04:17,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-20 07:04:17,300 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 19 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 43 [2021-11-20 07:04:17,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:04:17,302 INFO L225 Difference]: With dead ends: 219 [2021-11-20 07:04:17,302 INFO L226 Difference]: Without dead ends: 209 [2021-11-20 07:04:17,303 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 22.0s TimeCoverageRelationStatistics Valid=236, Invalid=1315, Unknown=9, NotChecked=0, Total=1560 [2021-11-20 07:04:17,303 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 36 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 316 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 07:04:17,304 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 354 Invalid, 454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 127 Invalid, 0 Unknown, 316 Unchecked, 0.3s Time] [2021-11-20 07:04:17,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-11-20 07:04:17,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 207. [2021-11-20 07:04:17,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 174 states have (on average 1.235632183908046) internal successors, (215), 174 states have internal predecessors, (215), 21 states have call successors, (21), 11 states have call predecessors, (21), 11 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2021-11-20 07:04:17,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 257 transitions. [2021-11-20 07:04:17,350 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 257 transitions. Word has length 43 [2021-11-20 07:04:17,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:04:17,350 INFO L470 AbstractCegarLoop]: Abstraction has 207 states and 257 transitions. [2021-11-20 07:04:17,351 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 19 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 07:04:17,351 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 257 transitions. [2021-11-20 07:04:17,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-20 07:04:17,352 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:04:17,352 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:04:17,384 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-20 07:04:17,569 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:04:17,569 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:04:17,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:04:17,570 INFO L85 PathProgramCache]: Analyzing trace with hash -312984003, now seen corresponding path program 9 times [2021-11-20 07:04:17,570 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:04:17,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008166096] [2021-11-20 07:04:17,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:04:17,570 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:04:17,577 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:04:17,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [990420245] [2021-11-20 07:04:17,577 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 07:04:17,577 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:04:17,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:04:17,578 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:04:17,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-20 07:04:17,731 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-20 07:04:17,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:04:17,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-20 07:04:17,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:04:17,944 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 29 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:04:17,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:04:18,094 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 07:04:18,094 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:04:18,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008166096] [2021-11-20 07:04:18,094 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:04:18,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990420245] [2021-11-20 07:04:18,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990420245] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:04:18,095 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:04:18,095 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2021-11-20 07:04:18,095 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653092501] [2021-11-20 07:04:18,095 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:04:18,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-20 07:04:18,096 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:04:18,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-20 07:04:18,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-11-20 07:04:18,097 INFO L87 Difference]: Start difference. First operand 207 states and 257 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 18 states have internal predecessors, (49), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-20 07:04:19,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:04:19,433 INFO L93 Difference]: Finished difference Result 472 states and 595 transitions. [2021-11-20 07:04:19,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-20 07:04:19,434 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 18 states have internal predecessors, (49), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 43 [2021-11-20 07:04:19,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:04:19,437 INFO L225 Difference]: With dead ends: 472 [2021-11-20 07:04:19,437 INFO L226 Difference]: Without dead ends: 355 [2021-11-20 07:04:19,438 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=267, Invalid=725, Unknown=0, NotChecked=0, Total=992 [2021-11-20 07:04:19,439 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 454 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 383 mSolverCounterSat, 218 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 459 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 218 IncrementalHoareTripleChecker+Valid, 383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:04:19,440 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [459 Valid, 236 Invalid, 601 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [218 Valid, 383 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-20 07:04:19,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2021-11-20 07:04:19,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 271. [2021-11-20 07:04:19,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 228 states have (on average 1.2587719298245614) internal successors, (287), 228 states have internal predecessors, (287), 30 states have call successors, (30), 12 states have call predecessors, (30), 12 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2021-11-20 07:04:19,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 347 transitions. [2021-11-20 07:04:19,507 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 347 transitions. Word has length 43 [2021-11-20 07:04:19,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:04:19,508 INFO L470 AbstractCegarLoop]: Abstraction has 271 states and 347 transitions. [2021-11-20 07:04:19,508 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 18 states have internal predecessors, (49), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-20 07:04:19,508 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 347 transitions. [2021-11-20 07:04:19,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-20 07:04:19,510 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:04:19,510 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:04:19,538 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-20 07:04:19,721 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-11-20 07:04:19,721 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:04:19,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:04:19,722 INFO L85 PathProgramCache]: Analyzing trace with hash 632291705, now seen corresponding path program 10 times [2021-11-20 07:04:19,722 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:04:19,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821419625] [2021-11-20 07:04:19,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:04:19,722 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:04:19,734 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:04:19,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1829392362] [2021-11-20 07:04:19,735 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 07:04:19,735 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:04:19,736 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:04:19,739 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:04:19,757 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-20 07:04:19,964 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 07:04:19,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:04:19,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-20 07:04:19,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:04:20,219 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 20 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:04:20,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:04:20,407 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 07:04:20,407 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:04:20,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821419625] [2021-11-20 07:04:20,407 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:04:20,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829392362] [2021-11-20 07:04:20,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829392362] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:04:20,407 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:04:20,408 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2021-11-20 07:04:20,408 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169323023] [2021-11-20 07:04:20,408 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:04:20,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-20 07:04:20,409 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:04:20,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-20 07:04:20,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-11-20 07:04:20,409 INFO L87 Difference]: Start difference. First operand 271 states and 347 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 18 states have internal predecessors, (49), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-20 07:04:21,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:04:21,791 INFO L93 Difference]: Finished difference Result 323 states and 396 transitions. [2021-11-20 07:04:21,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-20 07:04:21,791 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 18 states have internal predecessors, (49), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 43 [2021-11-20 07:04:21,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:04:21,793 INFO L225 Difference]: With dead ends: 323 [2021-11-20 07:04:21,793 INFO L226 Difference]: Without dead ends: 319 [2021-11-20 07:04:21,794 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=209, Invalid=603, Unknown=0, NotChecked=0, Total=812 [2021-11-20 07:04:21,795 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 152 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 482 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:04:21,795 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 290 Invalid, 569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 482 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-20 07:04:21,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2021-11-20 07:04:21,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 266. [2021-11-20 07:04:21,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 223 states have (on average 1.2556053811659194) internal successors, (280), 224 states have internal predecessors, (280), 30 states have call successors, (30), 12 states have call predecessors, (30), 12 states have return successors, (30), 29 states have call predecessors, (30), 30 states have call successors, (30) [2021-11-20 07:04:21,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 340 transitions. [2021-11-20 07:04:21,843 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 340 transitions. Word has length 43 [2021-11-20 07:04:21,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:04:21,843 INFO L470 AbstractCegarLoop]: Abstraction has 266 states and 340 transitions. [2021-11-20 07:04:21,844 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 18 states have internal predecessors, (49), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-20 07:04:21,844 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 340 transitions. [2021-11-20 07:04:21,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-20 07:04:21,845 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:04:21,845 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:04:21,883 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-20 07:04:22,061 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-20 07:04:22,061 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:04:22,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:04:22,062 INFO L85 PathProgramCache]: Analyzing trace with hash 2095173627, now seen corresponding path program 11 times [2021-11-20 07:04:22,062 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:04:22,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542067124] [2021-11-20 07:04:22,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:04:22,062 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:04:22,070 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:04:22,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1389176711] [2021-11-20 07:04:22,070 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-20 07:04:22,070 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:04:22,071 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:04:22,071 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:04:22,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-20 07:04:22,194 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-11-20 07:04:22,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:04:22,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 59 conjunts are in the unsatisfiable core [2021-11-20 07:04:22,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:04:22,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-20 07:04:22,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2021-11-20 07:04:22,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:04:22,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:04:22,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 53 [2021-11-20 07:04:22,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:04:22,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:04:22,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:04:22,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:04:22,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:04:22,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:04:22,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 67 [2021-11-20 07:04:22,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:04:22,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:04:22,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:04:22,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:04:22,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:04:22,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:04:22,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:04:22,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:04:22,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:04:22,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:04:22,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:04:22,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:04:22,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 13 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 97 [2021-11-20 07:04:22,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:04:22,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:04:22,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:04:22,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:04:22,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:04:22,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:04:22,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:04:22,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:04:22,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:04:22,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:04:22,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:04:22,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:04:22,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:04:22,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:04:22,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:04:22,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:04:22,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:04:22,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:04:22,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:04:22,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:04:22,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 21 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 127 [2021-11-20 07:04:24,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:04:24,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:04:24,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:04:24,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:04:24,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:04:24,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:04:24,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:04:24,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:04:24,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:04:24,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:04:24,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:04:24,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:04:24,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:04:24,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:04:24,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:04:24,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:04:24,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:04:24,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:04:24,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:04:24,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:04:24,470 INFO L354 Elim1Store]: treesize reduction 308, result has 29.2 percent of original size [2021-11-20 07:04:24,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 22 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 10 case distinctions, treesize of input 159 treesize of output 209 [2021-11-20 07:04:32,335 INFO L354 Elim1Store]: treesize reduction 278, result has 24.7 percent of original size [2021-11-20 07:04:32,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 10 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 172 treesize of output 194 [2021-11-20 07:04:32,448 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 4 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:04:32,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:04:46,851 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:04:46,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542067124] [2021-11-20 07:04:46,851 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:04:46,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389176711] [2021-11-20 07:04:46,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389176711] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:04:46,852 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:04:46,852 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2021-11-20 07:04:46,852 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053907294] [2021-11-20 07:04:46,852 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 07:04:46,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-20 07:04:46,853 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:04:46,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-20 07:04:46,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=1296, Unknown=2, NotChecked=0, Total=1482 [2021-11-20 07:04:46,855 INFO L87 Difference]: Start difference. First operand 266 states and 340 transitions. Second operand has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 25 states have internal predecessors, (41), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 07:04:47,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:04:47,918 INFO L93 Difference]: Finished difference Result 336 states and 430 transitions. [2021-11-20 07:04:47,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-20 07:04:47,919 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 25 states have internal predecessors, (41), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 45 [2021-11-20 07:04:47,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:04:47,923 INFO L225 Difference]: With dead ends: 336 [2021-11-20 07:04:47,923 INFO L226 Difference]: Without dead ends: 332 [2021-11-20 07:04:47,924 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 22 SyntacticMatches, 5 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 16.9s TimeCoverageRelationStatistics Valid=214, Invalid=1506, Unknown=2, NotChecked=0, Total=1722 [2021-11-20 07:04:47,925 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 43 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 256 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-20 07:04:47,931 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 230 Invalid, 593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 304 Invalid, 0 Unknown, 256 Unchecked, 0.6s Time] [2021-11-20 07:04:47,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2021-11-20 07:04:47,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 282. [2021-11-20 07:04:47,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 237 states have (on average 1.2531645569620253) internal successors, (297), 238 states have internal predecessors, (297), 31 states have call successors, (31), 13 states have call predecessors, (31), 13 states have return successors, (31), 30 states have call predecessors, (31), 31 states have call successors, (31) [2021-11-20 07:04:47,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 359 transitions. [2021-11-20 07:04:47,995 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 359 transitions. Word has length 45 [2021-11-20 07:04:47,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:04:47,995 INFO L470 AbstractCegarLoop]: Abstraction has 282 states and 359 transitions. [2021-11-20 07:04:47,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 25 states have internal predecessors, (41), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 07:04:47,996 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 359 transitions. [2021-11-20 07:04:47,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-20 07:04:47,996 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:04:47,996 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:04:48,019 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-20 07:04:48,197 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-11-20 07:04:48,197 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:04:48,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:04:48,197 INFO L85 PathProgramCache]: Analyzing trace with hash -510849927, now seen corresponding path program 7 times [2021-11-20 07:04:48,198 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:04:48,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367404344] [2021-11-20 07:04:48,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:04:48,198 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:04:48,203 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:04:48,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [830291898] [2021-11-20 07:04:48,204 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-20 07:04:48,204 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:04:48,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:04:48,214 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:04:48,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-20 07:04:48,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:04:48,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 64 conjunts are in the unsatisfiable core [2021-11-20 07:04:48,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:04:48,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-20 07:04:48,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2021-11-20 07:04:48,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:04:48,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:04:48,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 53 [2021-11-20 07:04:48,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:04:48,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:04:48,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:04:48,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:04:48,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:04:48,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:04:48,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 67 [2021-11-20 07:04:48,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:04:48,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:04:48,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:04:48,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:04:48,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:04:48,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:04:48,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:04:48,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:04:48,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:04:48,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:04:48,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:04:48,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:04:48,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 13 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 97 [2021-11-20 07:04:49,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:04:49,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:04:49,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:04:49,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:04:49,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:04:49,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:04:49,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:04:49,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:04:49,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:04:49,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:04:49,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:04:49,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:04:49,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:04:49,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:04:49,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:04:49,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:04:49,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:04:49,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:04:49,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:04:49,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:04:49,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 21 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 115 [2021-11-20 07:04:50,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:04:50,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:04:50,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:04:50,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:04:50,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:04:50,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:04:50,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:04:50,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:04:50,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:04:50,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:04:50,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:04:50,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:04:50,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:04:50,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:04:50,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:04:50,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:04:50,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:04:50,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:04:50,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:04:50,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:04:50,441 INFO L354 Elim1Store]: treesize reduction 228, result has 39.2 percent of original size [2021-11-20 07:04:50,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 22 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 10 case distinctions, treesize of input 132 treesize of output 205 [2021-11-20 07:04:54,689 INFO L354 Elim1Store]: treesize reduction 37, result has 9.8 percent of original size [2021-11-20 07:04:54,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 10 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 344 treesize of output 164 [2021-11-20 07:04:54,792 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 4 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:04:54,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:04:58,157 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:04:58,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367404344] [2021-11-20 07:04:58,157 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:04:58,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830291898] [2021-11-20 07:04:58,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830291898] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:04:58,158 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:04:58,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2021-11-20 07:04:58,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776251152] [2021-11-20 07:04:58,158 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 07:04:58,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-20 07:04:58,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:04:58,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-20 07:04:58,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=1517, Unknown=0, NotChecked=0, Total=1722 [2021-11-20 07:04:58,160 INFO L87 Difference]: Start difference. First operand 282 states and 359 transitions. Second operand has 30 states, 30 states have (on average 1.3666666666666667) internal successors, (41), 27 states have internal predecessors, (41), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 07:05:02,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:05:02,392 INFO L93 Difference]: Finished difference Result 329 states and 410 transitions. [2021-11-20 07:05:02,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-20 07:05:02,393 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.3666666666666667) internal successors, (41), 27 states have internal predecessors, (41), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 45 [2021-11-20 07:05:02,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:05:02,395 INFO L225 Difference]: With dead ends: 329 [2021-11-20 07:05:02,396 INFO L226 Difference]: Without dead ends: 325 [2021-11-20 07:05:02,397 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 20 SyntacticMatches, 5 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 845 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=335, Invalid=2421, Unknown=0, NotChecked=0, Total=2756 [2021-11-20 07:05:02,398 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 64 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 1060 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 1189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 1060 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 64 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 07:05:02,398 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 383 Invalid, 1189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1060 Invalid, 0 Unknown, 64 Unchecked, 2.3s Time] [2021-11-20 07:05:02,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2021-11-20 07:05:02,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 282. [2021-11-20 07:05:02,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 237 states have (on average 1.2531645569620253) internal successors, (297), 238 states have internal predecessors, (297), 31 states have call successors, (31), 13 states have call predecessors, (31), 13 states have return successors, (31), 30 states have call predecessors, (31), 31 states have call successors, (31) [2021-11-20 07:05:02,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 359 transitions. [2021-11-20 07:05:02,464 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 359 transitions. Word has length 45 [2021-11-20 07:05:02,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:05:02,465 INFO L470 AbstractCegarLoop]: Abstraction has 282 states and 359 transitions. [2021-11-20 07:05:02,465 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.3666666666666667) internal successors, (41), 27 states have internal predecessors, (41), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 07:05:02,465 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 359 transitions. [2021-11-20 07:05:02,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-20 07:05:02,466 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:05:02,466 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:05:02,505 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-20 07:05:02,681 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-20 07:05:02,681 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:05:02,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:05:02,682 INFO L85 PathProgramCache]: Analyzing trace with hash 1986278154, now seen corresponding path program 2 times [2021-11-20 07:05:02,682 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:05:02,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477176935] [2021-11-20 07:05:02,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:05:02,682 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:05:02,696 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:05:02,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1820160115] [2021-11-20 07:05:02,697 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 07:05:02,697 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:05:02,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:05:02,698 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:05:02,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-20 07:05:02,807 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 07:05:02,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:05:02,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 52 conjunts are in the unsatisfiable core [2021-11-20 07:05:02,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:05:02,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-20 07:05:02,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2021-11-20 07:05:03,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:03,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:03,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 53 [2021-11-20 07:05:03,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:03,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:03,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:03,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:03,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:03,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:03,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 67 [2021-11-20 07:05:04,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:04,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:04,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:04,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:04,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:04,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:04,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:04,071 INFO L354 Elim1Store]: treesize reduction 228, result has 12.6 percent of original size [2021-11-20 07:05:04,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 125 treesize of output 105 [2021-11-20 07:05:05,213 WARN L322 ript$VariableManager]: TermVariabe |aux_mod_ULTIMATE.start_main_~index~0#1_40| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:05:05,213 WARN L322 ript$VariableManager]: TermVariabe |aux_div_ULTIMATE.start_main_~index~0#1_40| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:05:06,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:06,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 07:05:06,138 INFO L354 Elim1Store]: treesize reduction 613, result has 8.0 percent of original size [2021-11-20 07:05:06,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 211 treesize of output 117 [2021-11-20 07:05:07,607 INFO L354 Elim1Store]: treesize reduction 152, result has 0.7 percent of original size [2021-11-20 07:05:07,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 95 treesize of output 51 [2021-11-20 07:05:07,679 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 8 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:05:07,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:05:16,763 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:05:16,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477176935] [2021-11-20 07:05:16,763 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:05:16,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820160115] [2021-11-20 07:05:16,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820160115] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:05:16,764 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:05:16,764 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2021-11-20 07:05:16,764 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60468827] [2021-11-20 07:05:16,764 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 07:05:16,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-20 07:05:16,765 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:05:16,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-20 07:05:16,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=962, Unknown=2, NotChecked=0, Total=1122 [2021-11-20 07:05:16,766 INFO L87 Difference]: Start difference. First operand 282 states and 359 transitions. Second operand has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 22 states have internal predecessors, (41), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 07:05:17,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:05:17,254 INFO L93 Difference]: Finished difference Result 310 states and 390 transitions. [2021-11-20 07:05:17,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-20 07:05:17,254 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 22 states have internal predecessors, (41), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 47 [2021-11-20 07:05:17,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:05:17,256 INFO L225 Difference]: With dead ends: 310 [2021-11-20 07:05:17,256 INFO L226 Difference]: Without dead ends: 298 [2021-11-20 07:05:17,257 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=184, Invalid=1074, Unknown=2, NotChecked=0, Total=1260 [2021-11-20 07:05:17,257 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 23 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 186 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:05:17,258 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 297 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 83 Invalid, 0 Unknown, 186 Unchecked, 0.2s Time] [2021-11-20 07:05:17,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2021-11-20 07:05:17,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 295. [2021-11-20 07:05:17,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 248 states have (on average 1.2459677419354838) internal successors, (309), 249 states have internal predecessors, (309), 32 states have call successors, (32), 14 states have call predecessors, (32), 14 states have return successors, (32), 31 states have call predecessors, (32), 32 states have call successors, (32) [2021-11-20 07:05:17,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 373 transitions. [2021-11-20 07:05:17,326 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 373 transitions. Word has length 47 [2021-11-20 07:05:17,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:05:17,326 INFO L470 AbstractCegarLoop]: Abstraction has 295 states and 373 transitions. [2021-11-20 07:05:17,326 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 22 states have internal predecessors, (41), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 07:05:17,326 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 373 transitions. [2021-11-20 07:05:17,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-20 07:05:17,327 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:05:17,328 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:05:17,364 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2021-11-20 07:05:17,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-20 07:05:17,542 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:05:17,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:05:17,542 INFO L85 PathProgramCache]: Analyzing trace with hash -1028825464, now seen corresponding path program 3 times [2021-11-20 07:05:17,542 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:05:17,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818514920] [2021-11-20 07:05:17,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:05:17,543 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:05:17,549 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:05:17,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1465084728] [2021-11-20 07:05:17,549 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 07:05:17,550 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:05:17,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:05:17,551 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:05:17,557 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-20 07:05:17,704 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-20 07:05:17,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:05:17,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 54 conjunts are in the unsatisfiable core [2021-11-20 07:05:17,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:05:17,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-20 07:05:17,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2021-11-20 07:05:17,889 INFO L354 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2021-11-20 07:05:17,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 57 treesize of output 46 [2021-11-20 07:05:18,072 INFO L354 Elim1Store]: treesize reduction 144, result has 20.4 percent of original size [2021-11-20 07:05:18,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 79 treesize of output 74 [2021-11-20 07:05:35,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:35,497 INFO L354 Elim1Store]: treesize reduction 266, result has 28.7 percent of original size [2021-11-20 07:05:35,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 2 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 144 treesize of output 190 [2021-11-20 07:05:50,447 WARN L322 ript$VariableManager]: TermVariabe |aux_mod_ULTIMATE.start_main_~index~0#1_40| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:05:50,447 WARN L322 ript$VariableManager]: TermVariabe |aux_div_ULTIMATE.start_main_~index~0#1_40| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:05:54,005 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-20 07:05:54,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:06:02,419 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:06:02,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818514920] [2021-11-20 07:06:02,420 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:06:02,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465084728] [2021-11-20 07:06:02,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465084728] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:06:02,420 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:06:02,420 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-11-20 07:06:02,421 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93508775] [2021-11-20 07:06:02,421 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 07:06:02,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-20 07:06:02,422 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:06:02,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-20 07:06:02,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=787, Unknown=10, NotChecked=0, Total=930 [2021-11-20 07:06:02,423 INFO L87 Difference]: Start difference. First operand 295 states and 373 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 15 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 07:06:04,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:06:04,728 INFO L93 Difference]: Finished difference Result 452 states and 580 transitions. [2021-11-20 07:06:04,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-20 07:06:04,728 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 15 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 47 [2021-11-20 07:06:04,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:06:04,730 INFO L225 Difference]: With dead ends: 452 [2021-11-20 07:06:04,730 INFO L226 Difference]: Without dead ends: 323 [2021-11-20 07:06:04,731 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 27.2s TimeCoverageRelationStatistics Valid=142, Invalid=839, Unknown=11, NotChecked=0, Total=992 [2021-11-20 07:06:04,732 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 12 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 133 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:06:04,732 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 261 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 133 Unchecked, 0.1s Time] [2021-11-20 07:06:04,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2021-11-20 07:06:04,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 319. [2021-11-20 07:06:04,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 268 states have (on average 1.2350746268656716) internal successors, (331), 268 states have internal predecessors, (331), 34 states have call successors, (34), 16 states have call predecessors, (34), 16 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2021-11-20 07:06:04,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 399 transitions. [2021-11-20 07:06:04,788 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 399 transitions. Word has length 47 [2021-11-20 07:06:04,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:06:04,789 INFO L470 AbstractCegarLoop]: Abstraction has 319 states and 399 transitions. [2021-11-20 07:06:04,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 15 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 07:06:04,789 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 399 transitions. [2021-11-20 07:06:04,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-20 07:06:04,790 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:06:04,791 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:06:04,822 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2021-11-20 07:06:05,009 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:06:05,009 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:06:05,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:06:05,010 INFO L85 PathProgramCache]: Analyzing trace with hash 1845729544, now seen corresponding path program 4 times [2021-11-20 07:06:05,010 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:06:05,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972634433] [2021-11-20 07:06:05,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:06:05,010 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:06:05,020 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:06:05,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1401549983] [2021-11-20 07:06:05,020 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 07:06:05,021 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:06:05,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:06:05,022 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:06:05,057 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-20 07:06:05,190 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 07:06:05,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:06:05,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 58 conjunts are in the unsatisfiable core [2021-11-20 07:06:05,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:06:05,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-20 07:06:05,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2021-11-20 07:06:05,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:06:05,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:06:05,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 53 [2021-11-20 07:06:05,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:06:05,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:06:05,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:06:05,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:06:05,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:06:05,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:06:05,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 83 [2021-11-20 07:06:16,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:06:16,323 INFO L354 Elim1Store]: treesize reduction 294, result has 30.2 percent of original size [2021-11-20 07:06:16,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 2 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 141 treesize of output 194 [2021-11-20 07:06:27,781 WARN L322 ript$VariableManager]: TermVariabe |aux_div_ULTIMATE.start_main_~index~0#1_40| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:06:31,296 INFO L354 Elim1Store]: treesize reduction 2043, result has 8.5 percent of original size [2021-11-20 07:06:31,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 56 case distinctions, treesize of input 312 treesize of output 338 [2021-11-20 07:06:38,255 INFO L354 Elim1Store]: treesize reduction 959, result has 11.9 percent of original size [2021-11-20 07:06:38,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 214 treesize of output 241 [2021-11-20 07:06:39,260 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 8 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:06:39,260 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:06:48,356 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:06:48,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972634433] [2021-11-20 07:06:48,356 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:06:48,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401549983] [2021-11-20 07:06:48,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401549983] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:06:48,357 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:06:48,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2021-11-20 07:06:48,357 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691121288] [2021-11-20 07:06:48,357 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 07:06:48,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-20 07:06:48,357 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:06:48,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-20 07:06:48,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=1233, Unknown=5, NotChecked=0, Total=1482 [2021-11-20 07:06:48,359 INFO L87 Difference]: Start difference. First operand 319 states and 399 transitions. Second operand has 29 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 25 states have internal predecessors, (41), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 07:06:48,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:06:48,938 INFO L93 Difference]: Finished difference Result 343 states and 425 transitions. [2021-11-20 07:06:48,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-20 07:06:48,939 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 25 states have internal predecessors, (41), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 47 [2021-11-20 07:06:48,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:06:48,940 INFO L225 Difference]: With dead ends: 343 [2021-11-20 07:06:48,940 INFO L226 Difference]: Without dead ends: 331 [2021-11-20 07:06:48,941 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 21.2s TimeCoverageRelationStatistics Valid=249, Invalid=1306, Unknown=5, NotChecked=0, Total=1560 [2021-11-20 07:06:48,942 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 21 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 220 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 07:06:48,942 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 348 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 71 Invalid, 0 Unknown, 220 Unchecked, 0.3s Time] [2021-11-20 07:06:48,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2021-11-20 07:06:49,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 326. [2021-11-20 07:06:49,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 273 states have (on average 1.2344322344322345) internal successors, (337), 273 states have internal predecessors, (337), 35 states have call successors, (35), 17 states have call predecessors, (35), 17 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2021-11-20 07:06:49,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 407 transitions. [2021-11-20 07:06:49,016 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 407 transitions. Word has length 47 [2021-11-20 07:06:49,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:06:49,017 INFO L470 AbstractCegarLoop]: Abstraction has 326 states and 407 transitions. [2021-11-20 07:06:49,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 25 states have internal predecessors, (41), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 07:06:49,017 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 407 transitions. [2021-11-20 07:06:49,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-20 07:06:49,018 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:06:49,018 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:06:49,042 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-11-20 07:06:49,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:06:49,221 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:06:49,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:06:49,222 INFO L85 PathProgramCache]: Analyzing trace with hash -1169374074, now seen corresponding path program 3 times [2021-11-20 07:06:49,222 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:06:49,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827278308] [2021-11-20 07:06:49,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:06:49,222 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:06:49,228 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:06:49,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1790696444] [2021-11-20 07:06:49,229 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 07:06:49,229 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:06:49,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:06:49,230 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:06:49,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-20 07:06:49,334 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-20 07:06:49,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:06:49,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 57 conjunts are in the unsatisfiable core [2021-11-20 07:06:49,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:06:49,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-20 07:06:49,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2021-11-20 07:06:49,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:06:49,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:06:49,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 39 [2021-11-20 07:06:49,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:06:49,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:06:49,663 INFO L354 Elim1Store]: treesize reduction 108, result has 23.4 percent of original size [2021-11-20 07:06:49,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 72 treesize of output 67 [2021-11-20 07:07:01,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:07:01,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:07:01,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:07:01,111 INFO L354 Elim1Store]: treesize reduction 222, result has 27.2 percent of original size [2021-11-20 07:07:01,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 122 treesize of output 147 [2021-11-20 07:07:26,962 WARN L322 ript$VariableManager]: TermVariabe |aux_div_ULTIMATE.start_main_~index~0#1_40| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 07:07:31,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:07:31,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 07:07:32,318 INFO L354 Elim1Store]: treesize reduction 994, result has 15.0 percent of original size [2021-11-20 07:07:32,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 37 case distinctions, treesize of input 179 treesize of output 274 [2021-11-20 07:08:42,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:08:42,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:08:43,788 INFO L354 Elim1Store]: treesize reduction 612, result has 18.7 percent of original size [2021-11-20 07:08:43,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 3 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 264 treesize of output 296 [2021-11-20 07:08:47,539 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:08:47,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:08:56,771 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:08:56,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827278308] [2021-11-20 07:08:56,771 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:08:56,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790696444] [2021-11-20 07:08:56,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790696444] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:08:56,771 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:08:56,771 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2021-11-20 07:08:56,771 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097796974] [2021-11-20 07:08:56,772 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 07:08:56,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-20 07:08:56,772 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:08:56,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-20 07:08:56,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=1191, Unknown=7, NotChecked=0, Total=1406 [2021-11-20 07:08:56,773 INFO L87 Difference]: Start difference. First operand 326 states and 407 transitions. Second operand has 28 states, 28 states have (on average 1.4642857142857142) internal successors, (41), 24 states have internal predecessors, (41), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 07:08:57,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:08:57,362 INFO L93 Difference]: Finished difference Result 390 states and 479 transitions. [2021-11-20 07:08:57,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-20 07:08:57,363 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.4642857142857142) internal successors, (41), 24 states have internal predecessors, (41), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 47 [2021-11-20 07:08:57,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:08:57,365 INFO L225 Difference]: With dead ends: 390 [2021-11-20 07:08:57,365 INFO L226 Difference]: Without dead ends: 378 [2021-11-20 07:08:57,365 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 23.4s TimeCoverageRelationStatistics Valid=223, Invalid=1330, Unknown=7, NotChecked=0, Total=1560 [2021-11-20 07:08:57,366 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 27 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 135 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:08:57,366 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 345 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 57 Invalid, 0 Unknown, 135 Unchecked, 0.1s Time] [2021-11-20 07:08:57,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-11-20 07:08:57,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 341. [2021-11-20 07:08:57,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 284 states have (on average 1.2288732394366197) internal successors, (349), 286 states have internal predecessors, (349), 37 states have call successors, (37), 19 states have call predecessors, (37), 19 states have return successors, (37), 35 states have call predecessors, (37), 37 states have call successors, (37) [2021-11-20 07:08:57,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 423 transitions. [2021-11-20 07:08:57,431 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 423 transitions. Word has length 47 [2021-11-20 07:08:57,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:08:57,432 INFO L470 AbstractCegarLoop]: Abstraction has 341 states and 423 transitions. [2021-11-20 07:08:57,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.4642857142857142) internal successors, (41), 24 states have internal predecessors, (41), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 07:08:57,432 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 423 transitions. [2021-11-20 07:08:57,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-20 07:08:57,433 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:08:57,433 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:08:57,471 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-11-20 07:08:57,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:08:57,649 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:08:57,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:08:57,650 INFO L85 PathProgramCache]: Analyzing trace with hash -824572419, now seen corresponding path program 12 times [2021-11-20 07:08:57,650 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:08:57,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073401072] [2021-11-20 07:08:57,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:08:57,650 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:08:57,658 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:08:57,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [707926483] [2021-11-20 07:08:57,660 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-20 07:08:57,660 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:08:57,660 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:08:57,661 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:08:57,681 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-11-20 07:08:57,770 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-11-20 07:08:57,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:08:57,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-20 07:08:57,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:08:57,966 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 40 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:08:57,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:08:58,180 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 07:08:58,180 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:08:58,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073401072] [2021-11-20 07:08:58,180 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:08:58,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707926483] [2021-11-20 07:08:58,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707926483] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:08:58,180 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:08:58,180 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2021-11-20 07:08:58,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290292040] [2021-11-20 07:08:58,180 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:08:58,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-20 07:08:58,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:08:58,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-20 07:08:58,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2021-11-20 07:08:58,181 INFO L87 Difference]: Start difference. First operand 341 states and 423 transitions. Second operand has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 21 states have internal predecessors, (55), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-20 07:08:59,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:08:59,909 INFO L93 Difference]: Finished difference Result 738 states and 932 transitions. [2021-11-20 07:08:59,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-20 07:08:59,909 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 21 states have internal predecessors, (55), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 47 [2021-11-20 07:08:59,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:08:59,912 INFO L225 Difference]: With dead ends: 738 [2021-11-20 07:08:59,912 INFO L226 Difference]: Without dead ends: 562 [2021-11-20 07:08:59,914 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=417, Invalid=1223, Unknown=0, NotChecked=0, Total=1640 [2021-11-20 07:08:59,914 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 483 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 507 mSolverCounterSat, 242 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 489 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 749 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 242 IncrementalHoareTripleChecker+Valid, 507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:08:59,914 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [489 Valid, 318 Invalid, 749 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [242 Valid, 507 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-20 07:08:59,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2021-11-20 07:09:00,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 424. [2021-11-20 07:09:00,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 351 states have (on average 1.2421652421652423) internal successors, (436), 354 states have internal predecessors, (436), 50 states have call successors, (50), 22 states have call predecessors, (50), 22 states have return successors, (50), 47 states have call predecessors, (50), 50 states have call successors, (50) [2021-11-20 07:09:00,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 536 transitions. [2021-11-20 07:09:00,045 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 536 transitions. Word has length 47 [2021-11-20 07:09:00,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:09:00,045 INFO L470 AbstractCegarLoop]: Abstraction has 424 states and 536 transitions. [2021-11-20 07:09:00,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 21 states have internal predecessors, (55), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-20 07:09:00,046 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 536 transitions. [2021-11-20 07:09:00,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-20 07:09:00,047 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:09:00,047 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:09:00,081 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-11-20 07:09:00,273 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:09:00,273 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:09:00,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:09:00,274 INFO L85 PathProgramCache]: Analyzing trace with hash 1347283513, now seen corresponding path program 13 times [2021-11-20 07:09:00,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:09:00,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035656544] [2021-11-20 07:09:00,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:09:00,274 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:09:00,292 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:09:00,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2130666141] [2021-11-20 07:09:00,293 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-20 07:09:00,293 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:09:00,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:09:00,294 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:09:00,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-20 07:09:00,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:09:00,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-20 07:09:00,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:09:00,572 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 29 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:09:00,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:09:00,791 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 07:09:00,791 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:09:00,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035656544] [2021-11-20 07:09:00,791 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:09:00,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130666141] [2021-11-20 07:09:00,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130666141] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:09:00,791 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:09:00,791 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2021-11-20 07:09:00,792 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440586197] [2021-11-20 07:09:00,792 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:09:00,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-20 07:09:00,792 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:09:00,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-20 07:09:00,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2021-11-20 07:09:00,793 INFO L87 Difference]: Start difference. First operand 424 states and 536 transitions. Second operand has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 21 states have internal predecessors, (55), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-20 07:09:02,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:09:02,248 INFO L93 Difference]: Finished difference Result 490 states and 598 transitions. [2021-11-20 07:09:02,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-20 07:09:02,248 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 21 states have internal predecessors, (55), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 47 [2021-11-20 07:09:02,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:09:02,251 INFO L225 Difference]: With dead ends: 490 [2021-11-20 07:09:02,251 INFO L226 Difference]: Without dead ends: 486 [2021-11-20 07:09:02,252 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=279, Invalid=843, Unknown=0, NotChecked=0, Total=1122 [2021-11-20 07:09:02,252 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 177 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 647 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 756 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 647 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:09:02,252 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 355 Invalid, 756 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 647 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-20 07:09:02,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2021-11-20 07:09:02,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 426. [2021-11-20 07:09:02,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 353 states have (on average 1.2407932011331444) internal successors, (438), 356 states have internal predecessors, (438), 50 states have call successors, (50), 22 states have call predecessors, (50), 22 states have return successors, (50), 47 states have call predecessors, (50), 50 states have call successors, (50) [2021-11-20 07:09:02,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 538 transitions. [2021-11-20 07:09:02,350 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 538 transitions. Word has length 47 [2021-11-20 07:09:02,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:09:02,351 INFO L470 AbstractCegarLoop]: Abstraction has 426 states and 538 transitions. [2021-11-20 07:09:02,351 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 21 states have internal predecessors, (55), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-20 07:09:02,351 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 538 transitions. [2021-11-20 07:09:02,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-20 07:09:02,352 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:09:02,353 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:09:02,390 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-11-20 07:09:02,577 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-11-20 07:09:02,577 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:09:02,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:09:02,578 INFO L85 PathProgramCache]: Analyzing trace with hash 2007533755, now seen corresponding path program 14 times [2021-11-20 07:09:02,578 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:09:02,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440758304] [2021-11-20 07:09:02,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:09:02,578 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:09:02,592 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:09:02,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1081609175] [2021-11-20 07:09:02,593 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 07:09:02,593 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:09:02,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:09:02,594 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:09:02,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-20 07:09:02,681 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 07:09:02,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:09:02,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 66 conjunts are in the unsatisfiable core [2021-11-20 07:09:02,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:09:02,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-20 07:09:02,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2021-11-20 07:09:02,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:09:02,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:09:02,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 43 [2021-11-20 07:09:03,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:09:03,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:09:03,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:09:03,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:09:03,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:09:03,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:09:03,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 67 [2021-11-20 07:09:03,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:09:03,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:09:03,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:09:03,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:09:03,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:09:03,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:09:03,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:09:03,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:09:03,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:09:03,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:09:03,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:09:03,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:09:03,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 13 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 91 [2021-11-20 07:09:03,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:09:03,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:09:03,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:09:03,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:09:03,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:09:03,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:09:03,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:09:03,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:09:03,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:09:03,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:09:03,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:09:03,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:09:03,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:09:03,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:09:03,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:09:03,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:09:03,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:09:03,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:09:03,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:09:03,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:09:03,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 21 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 115 [2021-11-20 07:09:03,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:09:03,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:09:03,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:09:03,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:09:03,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:09:03,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:09:03,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:09:03,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:09:03,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:09:03,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:09:03,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:09:03,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:09:03,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:09:03,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:09:03,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:09:03,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:09:03,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:09:03,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:09:03,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:09:03,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:09:03,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:09:03,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:09:03,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:09:03,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:09:03,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:09:03,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:09:03,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:09:03,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:09:03,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:09:03,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:09:03,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 31 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 132 treesize of output 145 [2021-11-20 07:09:05,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:09:05,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:09:05,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:09:05,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:09:05,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:09:05,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:09:05,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:09:05,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:09:05,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:09:05,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:09:05,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:09:05,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:09:05,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:09:05,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:09:05,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:09:05,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:09:05,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:09:05,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:09:05,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:09:05,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:09:05,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:09:05,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:09:05,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:09:05,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:09:05,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:09:05,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:09:05,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:09:05,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:09:05,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:09:05,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:09:05,372 INFO L354 Elim1Store]: treesize reduction 360, result has 31.4 percent of original size [2021-11-20 07:09:05,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 32 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 12 case distinctions, treesize of input 177 treesize of output 253 [2021-11-20 07:09:35,406 INFO L354 Elim1Store]: treesize reduction 322, result has 27.0 percent of original size [2021-11-20 07:09:35,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 14 select indices, 14 select index equivalence classes, 15 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 206 treesize of output 248 [2021-11-20 07:09:35,863 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 4 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:09:35,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:10:01,086 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:10:01,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440758304] [2021-11-20 07:10:01,086 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:10:01,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081609175] [2021-11-20 07:10:01,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081609175] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:10:01,086 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:10:01,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2021-11-20 07:10:01,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4175092] [2021-11-20 07:10:01,087 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 07:10:01,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-20 07:10:01,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:10:01,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-20 07:10:01,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=1670, Unknown=6, NotChecked=0, Total=1892 [2021-11-20 07:10:01,088 INFO L87 Difference]: Start difference. First operand 426 states and 538 transitions. Second operand has 30 states, 30 states have (on average 1.5) internal successors, (45), 28 states have internal predecessors, (45), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 07:10:01,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:10:01,716 INFO L93 Difference]: Finished difference Result 459 states and 575 transitions. [2021-11-20 07:10:01,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-20 07:10:01,717 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.5) internal successors, (45), 28 states have internal predecessors, (45), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 49 [2021-11-20 07:10:01,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:10:01,719 INFO L225 Difference]: With dead ends: 459 [2021-11-20 07:10:01,719 INFO L226 Difference]: Without dead ends: 455 [2021-11-20 07:10:01,720 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 22 SyntacticMatches, 6 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 655 ImplicationChecksByTransitivity, 27.2s TimeCoverageRelationStatistics Valid=221, Invalid=1753, Unknown=6, NotChecked=0, Total=1980 [2021-11-20 07:10:01,720 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 12 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 280 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 07:10:01,721 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 327 Invalid, 449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 167 Invalid, 0 Unknown, 280 Unchecked, 0.5s Time] [2021-11-20 07:10:01,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2021-11-20 07:10:01,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 442. [2021-11-20 07:10:01,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 442 states, 367 states have (on average 1.2397820163487738) internal successors, (455), 370 states have internal predecessors, (455), 51 states have call successors, (51), 23 states have call predecessors, (51), 23 states have return successors, (51), 48 states have call predecessors, (51), 51 states have call successors, (51) [2021-11-20 07:10:01,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 557 transitions. [2021-11-20 07:10:01,836 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 557 transitions. Word has length 49 [2021-11-20 07:10:01,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:10:01,837 INFO L470 AbstractCegarLoop]: Abstraction has 442 states and 557 transitions. [2021-11-20 07:10:01,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.5) internal successors, (45), 28 states have internal predecessors, (45), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 07:10:01,837 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 557 transitions. [2021-11-20 07:10:01,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-20 07:10:01,838 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:10:01,838 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:10:01,878 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-11-20 07:10:02,053 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-11-20 07:10:02,053 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:10:02,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:10:02,054 INFO L85 PathProgramCache]: Analyzing trace with hash 1584831929, now seen corresponding path program 8 times [2021-11-20 07:10:02,054 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:10:02,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86801717] [2021-11-20 07:10:02,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:10:02,054 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:10:02,070 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:10:02,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1740079705] [2021-11-20 07:10:02,071 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 07:10:02,071 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:10:02,071 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:10:02,072 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:10:02,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-11-20 07:10:02,190 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 07:10:02,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:10:02,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 67 conjunts are in the unsatisfiable core [2021-11-20 07:10:02,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:10:02,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-20 07:10:02,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2021-11-20 07:10:02,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:10:02,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:10:02,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 53 [2021-11-20 07:10:02,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:10:02,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:10:02,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:10:02,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:10:02,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:10:02,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:10:02,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 67 [2021-11-20 07:10:02,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:10:02,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:10:02,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:10:02,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:10:02,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:10:02,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:10:02,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:10:02,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:10:02,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:10:02,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:10:02,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:10:02,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:10:02,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 13 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 97 [2021-11-20 07:10:02,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:10:02,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:10:02,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:10:02,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:10:02,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:10:02,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:10:02,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:10:02,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:10:02,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:10:02,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:10:02,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:10:02,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:10:02,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:10:03,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:10:03,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:10:03,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:10:03,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:10:03,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:10:03,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:10:03,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:10:03,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 21 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 115 [2021-11-20 07:10:03,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:10:03,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:10:03,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:10:03,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:10:03,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:10:03,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:10:03,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:10:03,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:10:03,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:10:03,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:10:03,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:10:03,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:10:03,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:10:03,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:10:03,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:10:03,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:10:03,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:10:03,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:10:03,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:10:03,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:10:03,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:10:03,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:10:03,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:10:03,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:10:03,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:10:03,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:10:03,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:10:03,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:10:03,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:10:03,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:10:03,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 31 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 132 treesize of output 145 [2021-11-20 07:10:04,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:10:04,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:10:04,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:10:04,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:10:04,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:10:04,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:10:04,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:10:04,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:10:04,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:10:04,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:10:04,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:10:04,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:10:04,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:10:04,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:10:04,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:10:04,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:10:04,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:10:04,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:10:04,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:10:04,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:10:04,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:10:04,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:10:04,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:10:04,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:10:04,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:10:04,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:10:04,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:10:04,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:10:04,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:10:04,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:10:04,857 INFO L354 Elim1Store]: treesize reduction 312, result has 31.1 percent of original size [2021-11-20 07:10:04,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 32 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 12 case distinctions, treesize of input 154 treesize of output 209 [2021-11-20 07:10:07,666 INFO L354 Elim1Store]: treesize reduction 45, result has 8.2 percent of original size [2021-11-20 07:10:07,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 15 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 187 treesize of output 91 [2021-11-20 07:10:07,743 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 4 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:10:07,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:10:33,809 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:10:33,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86801717] [2021-11-20 07:10:33,809 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:10:33,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740079705] [2021-11-20 07:10:33,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740079705] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:10:33,809 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:10:33,809 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2021-11-20 07:10:33,810 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770024347] [2021-11-20 07:10:33,810 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 07:10:33,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-20 07:10:33,810 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:10:33,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-20 07:10:33,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=1671, Unknown=5, NotChecked=0, Total=1892 [2021-11-20 07:10:33,811 INFO L87 Difference]: Start difference. First operand 442 states and 557 transitions. Second operand has 30 states, 30 states have (on average 1.5) internal successors, (45), 28 states have internal predecessors, (45), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 07:10:36,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:10:36,800 INFO L93 Difference]: Finished difference Result 471 states and 589 transitions. [2021-11-20 07:10:36,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-20 07:10:36,801 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.5) internal successors, (45), 28 states have internal predecessors, (45), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 49 [2021-11-20 07:10:36,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:10:36,803 INFO L225 Difference]: With dead ends: 471 [2021-11-20 07:10:36,803 INFO L226 Difference]: Without dead ends: 467 [2021-11-20 07:10:36,804 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 6 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 663 ImplicationChecksByTransitivity, 28.0s TimeCoverageRelationStatistics Valid=232, Invalid=1833, Unknown=5, NotChecked=0, Total=2070 [2021-11-20 07:10:36,804 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 41 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 1066 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 1230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 1066 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 111 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-11-20 07:10:36,804 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 344 Invalid, 1230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 1066 Invalid, 0 Unknown, 111 Unchecked, 2.6s Time] [2021-11-20 07:10:36,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2021-11-20 07:10:36,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 445. [2021-11-20 07:10:36,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 370 states have (on average 1.2405405405405405) internal successors, (459), 373 states have internal predecessors, (459), 51 states have call successors, (51), 23 states have call predecessors, (51), 23 states have return successors, (51), 48 states have call predecessors, (51), 51 states have call successors, (51) [2021-11-20 07:10:36,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 561 transitions. [2021-11-20 07:10:36,919 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 561 transitions. Word has length 49 [2021-11-20 07:10:36,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:10:36,920 INFO L470 AbstractCegarLoop]: Abstraction has 445 states and 561 transitions. [2021-11-20 07:10:36,920 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.5) internal successors, (45), 28 states have internal predecessors, (45), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 07:10:36,920 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 561 transitions. [2021-11-20 07:10:36,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-20 07:10:36,922 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:10:36,922 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:10:36,961 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-11-20 07:10:37,137 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-11-20 07:10:37,137 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:10:37,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:10:37,138 INFO L85 PathProgramCache]: Analyzing trace with hash 545827978, now seen corresponding path program 3 times [2021-11-20 07:10:37,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:10:37,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753754148] [2021-11-20 07:10:37,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:10:37,138 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:10:37,147 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:10:37,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1364792810] [2021-11-20 07:10:37,148 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 07:10:37,148 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:10:37,148 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:10:37,149 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:10:37,176 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f3741bc-69ac-49fb-9845-a6ff442dd7e6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-11-20 07:10:37,396 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-11-20 07:10:37,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:10:37,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 63 conjunts are in the unsatisfiable core [2021-11-20 07:10:37,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:10:37,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-20 07:10:37,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2021-11-20 07:10:37,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:10:37,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:10:37,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 39 [2021-11-20 07:10:37,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:10:37,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:10:37,692 INFO L354 Elim1Store]: treesize reduction 108, result has 23.4 percent of original size [2021-11-20 07:10:37,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 72 treesize of output 67 [2021-11-20 07:10:38,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:10:38,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:10:38,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:10:38,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:10:38,080 INFO L354 Elim1Store]: treesize reduction 164, result has 16.8 percent of original size [2021-11-20 07:10:38,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 5 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 96 treesize of output 97 [2021-11-20 07:10:55,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:10:55,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:10:55,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:10:55,740 INFO L354 Elim1Store]: treesize reduction 402, result has 27.0 percent of original size [2021-11-20 07:10:55,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 4 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 18 case distinctions, treesize of input 167 treesize of output 239