./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/reducercommutativity/sep.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f8e1c903 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/config/AutomizerReach.xml -i ../../sv-benchmarks/c/reducercommutativity/sep.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 54d2da4a9e5a645ffa7361038eff25cc32e29a265e0324de9bda9a6d773becac --- Real Ultimate output --- This is Ultimate 0.2.1-dev-f8e1c90 [2021-11-09 09:46:35,654 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-09 09:46:35,656 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-09 09:46:35,706 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-09 09:46:35,706 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-09 09:46:35,708 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-09 09:46:35,711 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-09 09:46:35,714 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-09 09:46:35,717 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-09 09:46:35,719 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-09 09:46:35,721 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-09 09:46:35,723 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-09 09:46:35,724 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-09 09:46:35,725 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-09 09:46:35,728 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-09 09:46:35,730 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-09 09:46:35,732 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-09 09:46:35,734 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-09 09:46:35,737 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-09 09:46:35,744 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-09 09:46:35,747 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-09 09:46:35,762 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-09 09:46:35,764 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-09 09:46:35,766 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-09 09:46:35,771 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-09 09:46:35,771 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-09 09:46:35,772 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-09 09:46:35,773 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-09 09:46:35,774 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-09 09:46:35,776 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-09 09:46:35,776 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-09 09:46:35,784 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-09 09:46:35,794 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-09 09:46:35,796 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-09 09:46:35,798 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-09 09:46:35,799 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-09 09:46:35,800 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-09 09:46:35,801 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-09 09:46:35,801 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-09 09:46:35,803 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-09 09:46:35,804 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-09 09:46:35,805 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-09 09:46:35,870 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-09 09:46:35,873 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-09 09:46:35,874 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-09 09:46:35,874 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-09 09:46:35,877 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-09 09:46:35,877 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-09 09:46:35,877 INFO L138 SettingsManager]: * Use SBE=true [2021-11-09 09:46:35,878 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-09 09:46:35,878 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-09 09:46:35,878 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-09 09:46:35,879 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-09 09:46:35,880 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-09 09:46:35,880 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-09 09:46:35,880 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-09 09:46:35,881 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-09 09:46:35,881 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-09 09:46:35,882 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-09 09:46:35,882 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-09 09:46:35,883 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-09 09:46:35,883 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-09 09:46:35,883 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-09 09:46:35,883 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-09 09:46:35,884 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 09:46:35,884 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-09 09:46:35,885 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-09 09:46:35,885 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-09 09:46:35,885 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-09 09:46:35,886 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-09 09:46:35,886 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-09 09:46:35,888 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-09 09:46:35,888 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-09 09:46:35,888 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-09 09:46:35,889 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_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 54d2da4a9e5a645ffa7361038eff25cc32e29a265e0324de9bda9a6d773becac [2021-11-09 09:46:36,233 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-09 09:46:36,259 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-09 09:46:36,263 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-09 09:46:36,264 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-09 09:46:36,265 INFO L275 PluginConnector]: CDTParser initialized [2021-11-09 09:46:36,266 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/../../sv-benchmarks/c/reducercommutativity/sep.i [2021-11-09 09:46:36,344 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/data/fd1150c7e/57d438bbd8ea481094b79f745d46662b/FLAG5c1a98f40 [2021-11-09 09:46:36,958 INFO L306 CDTParser]: Found 1 translation units. [2021-11-09 09:46:36,959 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/sv-benchmarks/c/reducercommutativity/sep.i [2021-11-09 09:46:36,966 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/data/fd1150c7e/57d438bbd8ea481094b79f745d46662b/FLAG5c1a98f40 [2021-11-09 09:46:37,248 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/data/fd1150c7e/57d438bbd8ea481094b79f745d46662b [2021-11-09 09:46:37,251 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-09 09:46:37,253 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-09 09:46:37,254 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-09 09:46:37,255 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-09 09:46:37,259 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-09 09:46:37,260 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 09:46:37" (1/1) ... [2021-11-09 09:46:37,261 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76ca32d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:46:37, skipping insertion in model container [2021-11-09 09:46:37,262 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 09:46:37" (1/1) ... [2021-11-09 09:46:37,270 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-09 09:46:37,289 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-09 09:46:37,471 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/sv-benchmarks/c/reducercommutativity/sep.i[1298,1311] [2021-11-09 09:46:37,475 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 09:46:37,485 INFO L203 MainTranslator]: Completed pre-run [2021-11-09 09:46:37,512 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/sv-benchmarks/c/reducercommutativity/sep.i[1298,1311] [2021-11-09 09:46:37,513 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 09:46:37,529 INFO L208 MainTranslator]: Completed translation [2021-11-09 09:46:37,530 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:46:37 WrapperNode [2021-11-09 09:46:37,530 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-09 09:46:37,532 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-09 09:46:37,532 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-09 09:46:37,532 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-09 09:46:37,542 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:46:37" (1/1) ... [2021-11-09 09:46:37,551 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:46:37" (1/1) ... [2021-11-09 09:46:37,581 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-09 09:46:37,582 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-09 09:46:37,582 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-09 09:46:37,583 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-09 09:46:37,593 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:46:37" (1/1) ... [2021-11-09 09:46:37,593 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:46:37" (1/1) ... [2021-11-09 09:46:37,596 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:46:37" (1/1) ... [2021-11-09 09:46:37,597 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:46:37" (1/1) ... [2021-11-09 09:46:37,605 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:46:37" (1/1) ... [2021-11-09 09:46:37,610 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:46:37" (1/1) ... [2021-11-09 09:46:37,612 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:46:37" (1/1) ... [2021-11-09 09:46:37,615 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-09 09:46:37,616 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-09 09:46:37,623 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-09 09:46:37,624 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-09 09:46:37,625 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:46:37" (1/1) ... [2021-11-09 09:46:37,640 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 09:46:37,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:46:37,679 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-09 09:46:37,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-09 09:46:37,741 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-09 09:46:37,742 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-09 09:46:37,742 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-09 09:46:37,743 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-09 09:46:37,743 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-09 09:46:37,743 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-09 09:46:37,743 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-09 09:46:38,104 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-09 09:46:38,105 INFO L299 CfgBuilder]: Removed 14 assume(true) statements. [2021-11-09 09:46:38,107 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 09:46:38 BoogieIcfgContainer [2021-11-09 09:46:38,107 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-09 09:46:38,109 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-09 09:46:38,109 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-09 09:46:38,113 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-09 09:46:38,114 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 09:46:37" (1/3) ... [2021-11-09 09:46:38,115 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a04e97e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 09:46:38, skipping insertion in model container [2021-11-09 09:46:38,126 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:46:37" (2/3) ... [2021-11-09 09:46:38,129 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a04e97e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 09:46:38, skipping insertion in model container [2021-11-09 09:46:38,129 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 09:46:38" (3/3) ... [2021-11-09 09:46:38,131 INFO L111 eAbstractionObserver]: Analyzing ICFG sep.i [2021-11-09 09:46:38,138 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-09 09:46:38,138 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-09 09:46:38,217 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-09 09:46:38,241 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-09 09:46:38,241 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-09 09:46:38,274 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 28 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:46:38,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-09 09:46:38,281 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:46:38,281 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:46:38,282 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:46:38,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:46:38,292 INFO L85 PathProgramCache]: Analyzing trace with hash -805411982, now seen corresponding path program 1 times [2021-11-09 09:46:38,303 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:46:38,305 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27624145] [2021-11-09 09:46:38,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:46:38,322 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:46:38,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:46:38,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:46:38,603 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:46:38,604 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27624145] [2021-11-09 09:46:38,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27624145] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:46:38,607 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:46:38,608 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-09 09:46:38,610 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898290715] [2021-11-09 09:46:38,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-09 09:46:38,620 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:46:38,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-09 09:46:38,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-09 09:46:38,652 INFO L87 Difference]: Start difference. First operand has 29 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 28 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:46:38,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:46:38,680 INFO L93 Difference]: Finished difference Result 52 states and 72 transitions. [2021-11-09 09:46:38,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-09 09:46:38,682 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-11-09 09:46:38,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:46:38,697 INFO L225 Difference]: With dead ends: 52 [2021-11-09 09:46:38,697 INFO L226 Difference]: Without dead ends: 24 [2021-11-09 09:46:38,702 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-09 09:46:38,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-11-09 09:46:38,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-11-09 09:46:38,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:46:38,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2021-11-09 09:46:38,748 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 30 transitions. Word has length 16 [2021-11-09 09:46:38,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:46:38,750 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 30 transitions. [2021-11-09 09:46:38,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:46:38,751 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 30 transitions. [2021-11-09 09:46:38,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-09 09:46:38,752 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:46:38,753 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:46:38,753 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-09 09:46:38,754 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:46:38,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:46:38,759 INFO L85 PathProgramCache]: Analyzing trace with hash -1872946201, now seen corresponding path program 1 times [2021-11-09 09:46:38,759 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:46:38,760 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645234453] [2021-11-09 09:46:38,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:46:38,760 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:46:38,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:46:38,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:46:38,938 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:46:38,939 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645234453] [2021-11-09 09:46:38,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645234453] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:46:38,940 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:46:38,940 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 09:46:38,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55362900] [2021-11-09 09:46:38,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 09:46:38,943 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:46:38,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 09:46:38,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:46:38,945 INFO L87 Difference]: Start difference. First operand 24 states and 30 transitions. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:46:38,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:46:38,990 INFO L93 Difference]: Finished difference Result 45 states and 57 transitions. [2021-11-09 09:46:38,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 09:46:38,991 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-11-09 09:46:38,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:46:38,992 INFO L225 Difference]: With dead ends: 45 [2021-11-09 09:46:38,992 INFO L226 Difference]: Without dead ends: 27 [2021-11-09 09:46:38,993 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:46:38,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-11-09 09:46:38,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2021-11-09 09:46:38,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 24 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:46:39,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2021-11-09 09:46:39,001 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 31 transitions. Word has length 16 [2021-11-09 09:46:39,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:46:39,001 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 31 transitions. [2021-11-09 09:46:39,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:46:39,002 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 31 transitions. [2021-11-09 09:46:39,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-09 09:46:39,003 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:46:39,003 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:46:39,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-09 09:46:39,004 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:46:39,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:46:39,005 INFO L85 PathProgramCache]: Analyzing trace with hash -567209286, now seen corresponding path program 1 times [2021-11-09 09:46:39,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:46:39,006 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603189180] [2021-11-09 09:46:39,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:46:39,006 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:46:39,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:46:39,152 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 09:46:39,152 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:46:39,153 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603189180] [2021-11-09 09:46:39,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603189180] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:46:39,153 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:46:39,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 09:46:39,154 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327395376] [2021-11-09 09:46:39,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 09:46:39,155 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:46:39,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 09:46:39,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:46:39,156 INFO L87 Difference]: Start difference. First operand 25 states and 31 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:46:39,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:46:39,248 INFO L93 Difference]: Finished difference Result 46 states and 59 transitions. [2021-11-09 09:46:39,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 09:46:39,249 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-11-09 09:46:39,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:46:39,250 INFO L225 Difference]: With dead ends: 46 [2021-11-09 09:46:39,250 INFO L226 Difference]: Without dead ends: 33 [2021-11-09 09:46:39,251 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:46:39,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-11-09 09:46:39,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 27. [2021-11-09 09:46:39,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 26 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:46:39,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2021-11-09 09:46:39,258 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 19 [2021-11-09 09:46:39,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:46:39,258 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2021-11-09 09:46:39,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:46:39,259 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2021-11-09 09:46:39,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-09 09:46:39,260 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:46:39,260 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:46:39,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-09 09:46:39,261 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:46:39,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:46:39,262 INFO L85 PathProgramCache]: Analyzing trace with hash -2050984225, now seen corresponding path program 1 times [2021-11-09 09:46:39,262 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:46:39,262 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939271705] [2021-11-09 09:46:39,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:46:39,263 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:46:39,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:46:39,458 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-09 09:46:39,459 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:46:39,459 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939271705] [2021-11-09 09:46:39,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939271705] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:46:39,460 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:46:39,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 09:46:39,460 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195675684] [2021-11-09 09:46:39,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 09:46:39,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:46:39,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 09:46:39,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:46:39,462 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:46:39,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:46:39,529 INFO L93 Difference]: Finished difference Result 39 states and 47 transitions. [2021-11-09 09:46:39,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 09:46:39,532 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-11-09 09:46:39,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:46:39,533 INFO L225 Difference]: With dead ends: 39 [2021-11-09 09:46:39,534 INFO L226 Difference]: Without dead ends: 29 [2021-11-09 09:46:39,534 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:46:39,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-11-09 09:46:39,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2021-11-09 09:46:39,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 27 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:46:39,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2021-11-09 09:46:39,541 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 25 [2021-11-09 09:46:39,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:46:39,541 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2021-11-09 09:46:39,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:46:39,542 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2021-11-09 09:46:39,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-09 09:46:39,543 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:46:39,543 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:46:39,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-09 09:46:39,544 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:46:39,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:46:39,547 INFO L85 PathProgramCache]: Analyzing trace with hash 1500824769, now seen corresponding path program 1 times [2021-11-09 09:46:39,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:46:39,548 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854636532] [2021-11-09 09:46:39,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:46:39,549 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:46:39,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:46:39,711 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-09 09:46:39,712 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:46:39,712 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854636532] [2021-11-09 09:46:39,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854636532] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:46:39,712 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689250066] [2021-11-09 09:46:39,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:46:39,713 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:46:39,713 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:46:39,722 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:46:39,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-09 09:46:39,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:46:39,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-09 09:46:39,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:46:40,081 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-09 09:46:40,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689250066] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:46:40,081 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:46:40,081 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-11-09 09:46:40,082 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934490928] [2021-11-09 09:46:40,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 09:46:40,082 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:46:40,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 09:46:40,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-09 09:46:40,084 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:46:40,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:46:40,145 INFO L93 Difference]: Finished difference Result 54 states and 67 transitions. [2021-11-09 09:46:40,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-09 09:46:40,146 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-11-09 09:46:40,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:46:40,147 INFO L225 Difference]: With dead ends: 54 [2021-11-09 09:46:40,147 INFO L226 Difference]: Without dead ends: 33 [2021-11-09 09:46:40,148 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-09 09:46:40,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-11-09 09:46:40,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2021-11-09 09:46:40,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 30 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:46:40,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2021-11-09 09:46:40,154 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 27 [2021-11-09 09:46:40,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:46:40,155 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2021-11-09 09:46:40,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:46:40,155 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2021-11-09 09:46:40,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-09 09:46:40,156 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:46:40,156 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:46:40,189 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-09 09:46:40,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:46:40,365 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:46:40,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:46:40,366 INFO L85 PathProgramCache]: Analyzing trace with hash 1175870478, now seen corresponding path program 2 times [2021-11-09 09:46:40,366 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:46:40,366 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696175278] [2021-11-09 09:46:40,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:46:40,367 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:46:40,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:46:40,534 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-09 09:46:40,536 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:46:40,543 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696175278] [2021-11-09 09:46:40,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696175278] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:46:40,544 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073746338] [2021-11-09 09:46:40,544 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:46:40,544 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:46:40,545 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:46:40,547 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:46:40,569 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-09 09:46:40,658 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:46:40,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:46:40,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-09 09:46:40,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:46:40,862 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-09 09:46:40,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073746338] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:46:40,863 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:46:40,863 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-11-09 09:46:40,863 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520426119] [2021-11-09 09:46:40,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-09 09:46:40,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:46:40,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-09 09:46:40,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-11-09 09:46:40,866 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:46:40,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:46:40,966 INFO L93 Difference]: Finished difference Result 58 states and 74 transitions. [2021-11-09 09:46:40,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 09:46:40,967 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-11-09 09:46:40,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:46:40,968 INFO L225 Difference]: With dead ends: 58 [2021-11-09 09:46:40,968 INFO L226 Difference]: Without dead ends: 43 [2021-11-09 09:46:40,970 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2021-11-09 09:46:40,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-11-09 09:46:40,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 37. [2021-11-09 09:46:40,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.2777777777777777) internal successors, (46), 36 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:46:40,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2021-11-09 09:46:40,988 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 30 [2021-11-09 09:46:40,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:46:40,989 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2021-11-09 09:46:40,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:46:40,989 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2021-11-09 09:46:40,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-09 09:46:40,993 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:46:40,994 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:46:41,034 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-09 09:46:41,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-09 09:46:41,221 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:46:41,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:46:41,222 INFO L85 PathProgramCache]: Analyzing trace with hash 657704709, now seen corresponding path program 3 times [2021-11-09 09:46:41,222 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:46:41,222 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545768710] [2021-11-09 09:46:41,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:46:41,222 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:46:41,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:46:42,173 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 09:46:42,174 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:46:42,174 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545768710] [2021-11-09 09:46:42,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545768710] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:46:42,174 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643431873] [2021-11-09 09:46:42,174 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 09:46:42,175 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:46:42,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:46:42,178 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:46:42,185 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-09 09:46:42,306 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-09 09:46:42,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:46:42,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-09 09:46:42,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:46:43,861 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 09:46:43,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643431873] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:46:43,861 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:46:43,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 19 [2021-11-09 09:46:43,862 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331329639] [2021-11-09 09:46:43,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-09 09:46:43,863 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:46:43,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-09 09:46:43,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-11-09 09:46:43,864 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:46:44,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:46:44,570 INFO L93 Difference]: Finished difference Result 206 states and 252 transitions. [2021-11-09 09:46:44,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-09 09:46:44,572 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-11-09 09:46:44,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:46:44,576 INFO L225 Difference]: With dead ends: 206 [2021-11-09 09:46:44,576 INFO L226 Difference]: Without dead ends: 201 [2021-11-09 09:46:44,577 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 28 SyntacticMatches, 6 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2021-11-09 09:46:44,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-11-09 09:46:44,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 82. [2021-11-09 09:46:44,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 1.3703703703703705) internal successors, (111), 81 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:46:44,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 111 transitions. [2021-11-09 09:46:44,617 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 111 transitions. Word has length 36 [2021-11-09 09:46:44,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:46:44,620 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 111 transitions. [2021-11-09 09:46:44,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:46:44,620 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 111 transitions. [2021-11-09 09:46:44,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-09 09:46:44,627 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:46:44,628 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:46:44,674 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-09 09:46:44,846 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:46:44,846 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:46:44,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:46:44,847 INFO L85 PathProgramCache]: Analyzing trace with hash -1862255225, now seen corresponding path program 1 times [2021-11-09 09:46:44,847 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:46:44,847 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057226588] [2021-11-09 09:46:44,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:46:44,848 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:46:44,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:46:45,520 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-09 09:46:45,520 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:46:45,520 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057226588] [2021-11-09 09:46:45,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057226588] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:46:45,521 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869279754] [2021-11-09 09:46:45,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:46:45,521 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:46:45,521 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:46:45,533 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:46:45,553 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-09 09:46:45,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:46:45,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-09 09:46:45,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:46:46,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-09 09:46:46,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-11-09 09:46:46,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-09 09:46:46,488 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-09 09:46:46,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869279754] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:46:46,489 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:46:46,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 21 [2021-11-09 09:46:46,489 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697217252] [2021-11-09 09:46:46,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-09 09:46:46,497 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:46:46,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-09 09:46:46,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2021-11-09 09:46:46,499 INFO L87 Difference]: Start difference. First operand 82 states and 111 transitions. Second operand has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:46:49,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:46:49,245 INFO L93 Difference]: Finished difference Result 299 states and 391 transitions. [2021-11-09 09:46:49,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-11-09 09:46:49,246 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-11-09 09:46:49,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:46:49,257 INFO L225 Difference]: With dead ends: 299 [2021-11-09 09:46:49,257 INFO L226 Difference]: Without dead ends: 267 [2021-11-09 09:46:49,263 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 797 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=775, Invalid=2531, Unknown=0, NotChecked=0, Total=3306 [2021-11-09 09:46:49,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2021-11-09 09:46:49,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 164. [2021-11-09 09:46:49,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 1.3374233128834356) internal successors, (218), 163 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:46:49,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 218 transitions. [2021-11-09 09:46:49,310 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 218 transitions. Word has length 36 [2021-11-09 09:46:49,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:46:49,310 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 218 transitions. [2021-11-09 09:46:49,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:46:49,311 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 218 transitions. [2021-11-09 09:46:49,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-09 09:46:49,312 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:46:49,313 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:46:49,348 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-09 09:46:49,541 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-09 09:46:49,541 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:46:49,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:46:49,542 INFO L85 PathProgramCache]: Analyzing trace with hash -159943741, now seen corresponding path program 1 times [2021-11-09 09:46:49,542 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:46:49,542 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114563315] [2021-11-09 09:46:49,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:46:49,542 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:46:49,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:46:50,086 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-09 09:46:50,086 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:46:50,087 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114563315] [2021-11-09 09:46:50,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114563315] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:46:50,087 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033814101] [2021-11-09 09:46:50,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:46:50,088 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:46:50,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:46:50,093 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:46:50,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-09 09:46:50,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:46:50,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-09 09:46:50,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:46:50,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:46:50,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 28 [2021-11-09 09:46:50,738 INFO L354 Elim1Store]: treesize reduction 42, result has 33.3 percent of original size [2021-11-09 09:46:50,739 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 3 case distinctions, treesize of input 49 treesize of output 49 [2021-11-09 09:46:50,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-11-09 09:46:50,837 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-09 09:46:50,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033814101] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:46:50,841 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:46:50,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 14 [2021-11-09 09:46:50,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528491886] [2021-11-09 09:46:50,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-09 09:46:50,846 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:46:50,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-09 09:46:50,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-11-09 09:46:50,849 INFO L87 Difference]: Start difference. First operand 164 states and 218 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:46:51,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:46:51,757 INFO L93 Difference]: Finished difference Result 407 states and 542 transitions. [2021-11-09 09:46:51,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-09 09:46:51,758 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-11-09 09:46:51,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:46:51,760 INFO L225 Difference]: With dead ends: 407 [2021-11-09 09:46:51,760 INFO L226 Difference]: Without dead ends: 324 [2021-11-09 09:46:51,761 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 30 SyntacticMatches, 7 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=122, Invalid=478, Unknown=0, NotChecked=0, Total=600 [2021-11-09 09:46:51,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2021-11-09 09:46:51,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 223. [2021-11-09 09:46:51,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 1.3603603603603605) internal successors, (302), 222 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:46:51,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 302 transitions. [2021-11-09 09:46:51,800 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 302 transitions. Word has length 36 [2021-11-09 09:46:51,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:46:51,801 INFO L470 AbstractCegarLoop]: Abstraction has 223 states and 302 transitions. [2021-11-09 09:46:51,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:46:51,801 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 302 transitions. [2021-11-09 09:46:51,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-09 09:46:51,803 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:46:51,803 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:46:51,840 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-09 09:46:52,025 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:46:52,025 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:46:52,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:46:52,025 INFO L85 PathProgramCache]: Analyzing trace with hash -552970751, now seen corresponding path program 1 times [2021-11-09 09:46:52,026 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:46:52,026 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726273081] [2021-11-09 09:46:52,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:46:52,026 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:46:52,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:46:52,880 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-09 09:46:52,880 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:46:52,880 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726273081] [2021-11-09 09:46:52,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726273081] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:46:52,881 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821952422] [2021-11-09 09:46:52,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:46:52,881 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:46:52,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:46:52,882 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:46:52,905 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-09 09:46:53,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:46:53,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 51 conjunts are in the unsatisfiable core [2021-11-09 09:46:53,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:46:53,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:46:53,506 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 0 case distinctions, treesize of input 42 treesize of output 24 [2021-11-09 09:46:53,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:46:53,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 24 [2021-11-09 09:46:53,938 INFO L354 Elim1Store]: treesize reduction 42, result has 33.3 percent of original size [2021-11-09 09:46:53,939 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 3 case distinctions, treesize of input 45 treesize of output 45 [2021-11-09 09:46:53,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-11-09 09:46:54,086 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-09 09:46:54,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821952422] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:46:54,087 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:46:54,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 20 [2021-11-09 09:46:54,088 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656400820] [2021-11-09 09:46:54,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-09 09:46:54,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:46:54,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-09 09:46:54,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-11-09 09:46:54,090 INFO L87 Difference]: Start difference. First operand 223 states and 302 transitions. Second operand has 20 states, 20 states have (on average 2.35) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:46:55,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:46:55,148 INFO L93 Difference]: Finished difference Result 410 states and 546 transitions. [2021-11-09 09:46:55,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-09 09:46:55,149 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.35) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-11-09 09:46:55,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:46:55,151 INFO L225 Difference]: With dead ends: 410 [2021-11-09 09:46:55,152 INFO L226 Difference]: Without dead ends: 305 [2021-11-09 09:46:55,154 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=167, Invalid=825, Unknown=0, NotChecked=0, Total=992 [2021-11-09 09:46:55,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2021-11-09 09:46:55,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 242. [2021-11-09 09:46:55,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 241 states have (on average 1.3278008298755186) internal successors, (320), 241 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:46:55,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 320 transitions. [2021-11-09 09:46:55,194 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 320 transitions. Word has length 36 [2021-11-09 09:46:55,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:46:55,194 INFO L470 AbstractCegarLoop]: Abstraction has 242 states and 320 transitions. [2021-11-09 09:46:55,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.35) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:46:55,195 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 320 transitions. [2021-11-09 09:46:55,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-09 09:46:55,197 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:46:55,197 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:46:55,233 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-09 09:46:55,410 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:46:55,411 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:46:55,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:46:55,411 INFO L85 PathProgramCache]: Analyzing trace with hash 238469769, now seen corresponding path program 1 times [2021-11-09 09:46:55,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:46:55,412 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765466016] [2021-11-09 09:46:55,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:46:55,412 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:46:55,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:46:55,938 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-09 09:46:55,938 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:46:55,938 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765466016] [2021-11-09 09:46:55,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765466016] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:46:55,939 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626355831] [2021-11-09 09:46:55,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:46:55,939 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:46:55,939 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:46:55,945 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:46:55,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-09 09:46:56,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:46:56,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-09 09:46:56,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:46:56,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-11-09 09:46:56,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-09 09:46:56,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-11-09 09:46:56,969 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-09 09:46:56,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626355831] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:46:56,970 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:46:56,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-11-09 09:46:56,971 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207741739] [2021-11-09 09:46:56,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-09 09:46:56,972 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:46:56,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-09 09:46:56,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-11-09 09:46:56,973 INFO L87 Difference]: Start difference. First operand 242 states and 320 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:46:59,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:46:59,276 INFO L93 Difference]: Finished difference Result 403 states and 521 transitions. [2021-11-09 09:46:59,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-09 09:46:59,276 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-11-09 09:46:59,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:46:59,280 INFO L225 Difference]: With dead ends: 403 [2021-11-09 09:46:59,280 INFO L226 Difference]: Without dead ends: 393 [2021-11-09 09:46:59,282 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 669 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=745, Invalid=2225, Unknown=0, NotChecked=0, Total=2970 [2021-11-09 09:46:59,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2021-11-09 09:46:59,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 307. [2021-11-09 09:46:59,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 1.3137254901960784) internal successors, (402), 306 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:46:59,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 402 transitions. [2021-11-09 09:46:59,352 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 402 transitions. Word has length 36 [2021-11-09 09:46:59,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:46:59,352 INFO L470 AbstractCegarLoop]: Abstraction has 307 states and 402 transitions. [2021-11-09 09:46:59,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:46:59,353 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 402 transitions. [2021-11-09 09:46:59,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-09 09:46:59,354 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:46:59,354 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:46:59,398 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-09 09:46:59,569 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-09 09:46:59,569 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:46:59,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:46:59,570 INFO L85 PathProgramCache]: Analyzing trace with hash 2013477131, now seen corresponding path program 1 times [2021-11-09 09:46:59,570 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:46:59,570 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232390925] [2021-11-09 09:46:59,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:46:59,570 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:46:59,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:46:59,963 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-09 09:46:59,963 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:46:59,963 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232390925] [2021-11-09 09:46:59,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232390925] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:46:59,964 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573165902] [2021-11-09 09:46:59,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:46:59,964 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:46:59,964 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:46:59,969 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:46:59,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-09 09:47:00,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:47:00,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-09 09:47:00,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:47:00,865 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-09 09:47:00,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573165902] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:47:00,866 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:47:00,866 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-11-09 09:47:00,866 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131026724] [2021-11-09 09:47:00,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-09 09:47:00,867 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:47:00,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-09 09:47:00,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-11-09 09:47:00,868 INFO L87 Difference]: Start difference. First operand 307 states and 402 transitions. Second operand has 15 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:47:01,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:47:01,367 INFO L93 Difference]: Finished difference Result 599 states and 773 transitions. [2021-11-09 09:47:01,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-09 09:47:01,367 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-11-09 09:47:01,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:47:01,372 INFO L225 Difference]: With dead ends: 599 [2021-11-09 09:47:01,372 INFO L226 Difference]: Without dead ends: 594 [2021-11-09 09:47:01,374 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 29 SyntacticMatches, 9 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2021-11-09 09:47:01,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2021-11-09 09:47:01,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 378. [2021-11-09 09:47:01,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 377 states have (on average 1.3209549071618036) internal successors, (498), 377 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:47:01,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 498 transitions. [2021-11-09 09:47:01,437 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 498 transitions. Word has length 36 [2021-11-09 09:47:01,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:47:01,437 INFO L470 AbstractCegarLoop]: Abstraction has 378 states and 498 transitions. [2021-11-09 09:47:01,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:47:01,438 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 498 transitions. [2021-11-09 09:47:01,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-09 09:47:01,441 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:47:01,441 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:47:01,471 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-09 09:47:01,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-09 09:47:01,653 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:47:01,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:47:01,653 INFO L85 PathProgramCache]: Analyzing trace with hash 932464323, now seen corresponding path program 1 times [2021-11-09 09:47:01,654 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:47:01,654 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112806826] [2021-11-09 09:47:01,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:47:01,654 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:47:01,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:47:02,122 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-09 09:47:02,123 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:47:02,123 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112806826] [2021-11-09 09:47:02,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112806826] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:47:02,123 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332951302] [2021-11-09 09:47:02,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:47:02,123 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:47:02,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:47:02,129 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:47:02,152 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-09 09:47:02,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:47:02,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-09 09:47:02,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:47:02,821 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 09:47:02,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 26 [2021-11-09 09:47:02,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-11-09 09:47:02,981 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-09 09:47:02,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332951302] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:47:02,981 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:47:02,982 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 13 [2021-11-09 09:47:02,982 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922665868] [2021-11-09 09:47:02,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-09 09:47:02,983 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:47:02,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-09 09:47:02,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-09 09:47:02,984 INFO L87 Difference]: Start difference. First operand 378 states and 498 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:47:03,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:47:03,468 INFO L93 Difference]: Finished difference Result 424 states and 554 transitions. [2021-11-09 09:47:03,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-09 09:47:03,469 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-11-09 09:47:03,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:47:03,471 INFO L225 Difference]: With dead ends: 424 [2021-11-09 09:47:03,472 INFO L226 Difference]: Without dead ends: 365 [2021-11-09 09:47:03,473 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-11-09 09:47:03,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2021-11-09 09:47:03,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 353. [2021-11-09 09:47:03,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 352 states have (on average 1.3125) internal successors, (462), 352 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:47:03,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 462 transitions. [2021-11-09 09:47:03,516 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 462 transitions. Word has length 36 [2021-11-09 09:47:03,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:47:03,517 INFO L470 AbstractCegarLoop]: Abstraction has 353 states and 462 transitions. [2021-11-09 09:47:03,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:47:03,517 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 462 transitions. [2021-11-09 09:47:03,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-09 09:47:03,519 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:47:03,519 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:47:03,551 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-09 09:47:03,733 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-09 09:47:03,733 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:47:03,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:47:03,733 INFO L85 PathProgramCache]: Analyzing trace with hash -278211137, now seen corresponding path program 2 times [2021-11-09 09:47:03,734 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:47:03,734 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570766020] [2021-11-09 09:47:03,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:47:03,734 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:47:03,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:47:04,071 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-09 09:47:04,072 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:47:04,072 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570766020] [2021-11-09 09:47:04,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570766020] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:47:04,072 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270061848] [2021-11-09 09:47:04,072 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:47:04,073 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:47:04,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:47:04,074 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:47:04,084 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-09 09:47:04,574 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:47:04,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:47:04,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-09 09:47:04,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:47:05,065 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-09 09:47:05,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270061848] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:47:05,065 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:47:05,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-11-09 09:47:05,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547585508] [2021-11-09 09:47:05,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-09 09:47:05,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:47:05,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-09 09:47:05,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-11-09 09:47:05,067 INFO L87 Difference]: Start difference. First operand 353 states and 462 transitions. Second operand has 15 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:47:05,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:47:05,533 INFO L93 Difference]: Finished difference Result 628 states and 808 transitions. [2021-11-09 09:47:05,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-09 09:47:05,533 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-11-09 09:47:05,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:47:05,538 INFO L225 Difference]: With dead ends: 628 [2021-11-09 09:47:05,538 INFO L226 Difference]: Without dead ends: 623 [2021-11-09 09:47:05,539 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 32 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2021-11-09 09:47:05,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2021-11-09 09:47:05,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 406. [2021-11-09 09:47:05,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 1.3185185185185184) internal successors, (534), 405 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:47:05,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 534 transitions. [2021-11-09 09:47:05,602 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 534 transitions. Word has length 36 [2021-11-09 09:47:05,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:47:05,602 INFO L470 AbstractCegarLoop]: Abstraction has 406 states and 534 transitions. [2021-11-09 09:47:05,602 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:47:05,603 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 534 transitions. [2021-11-09 09:47:05,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-09 09:47:05,604 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:47:05,604 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:47:05,630 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-09 09:47:05,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-09 09:47:05,805 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:47:05,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:47:05,805 INFO L85 PathProgramCache]: Analyzing trace with hash 1077561285, now seen corresponding path program 1 times [2021-11-09 09:47:05,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:47:05,805 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207667585] [2021-11-09 09:47:05,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:47:05,806 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:47:05,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:47:06,374 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 09:47:06,374 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:47:06,374 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207667585] [2021-11-09 09:47:06,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207667585] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:47:06,375 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188976552] [2021-11-09 09:47:06,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:47:06,375 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:47:06,375 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:47:06,381 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:47:06,405 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-09 09:47:06,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:47:06,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-09 09:47:06,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:47:07,785 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 09:47:07,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188976552] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:47:07,786 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:47:07,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 19 [2021-11-09 09:47:07,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076687237] [2021-11-09 09:47:07,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-09 09:47:07,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:47:07,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-09 09:47:07,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-11-09 09:47:07,788 INFO L87 Difference]: Start difference. First operand 406 states and 534 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:47:08,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:47:08,713 INFO L93 Difference]: Finished difference Result 778 states and 1009 transitions. [2021-11-09 09:47:08,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-09 09:47:08,714 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-11-09 09:47:08,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:47:08,719 INFO L225 Difference]: With dead ends: 778 [2021-11-09 09:47:08,719 INFO L226 Difference]: Without dead ends: 773 [2021-11-09 09:47:08,720 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 29 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2021-11-09 09:47:08,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 773 states. [2021-11-09 09:47:08,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 773 to 497. [2021-11-09 09:47:08,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 497 states, 496 states have (on average 1.3366935483870968) internal successors, (663), 496 states have internal predecessors, (663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:47:08,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 663 transitions. [2021-11-09 09:47:08,805 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 663 transitions. Word has length 36 [2021-11-09 09:47:08,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:47:08,805 INFO L470 AbstractCegarLoop]: Abstraction has 497 states and 663 transitions. [2021-11-09 09:47:08,806 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:47:08,806 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 663 transitions. [2021-11-09 09:47:08,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-09 09:47:08,808 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:47:08,808 INFO L513 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] [2021-11-09 09:47:08,851 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-09 09:47:09,033 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-09 09:47:09,033 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:47:09,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:47:09,033 INFO L85 PathProgramCache]: Analyzing trace with hash 532244478, now seen corresponding path program 4 times [2021-11-09 09:47:09,034 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:47:09,034 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403211452] [2021-11-09 09:47:09,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:47:09,034 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:47:09,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:47:09,125 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-09 09:47:09,126 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:47:09,126 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403211452] [2021-11-09 09:47:09,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403211452] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:47:09,126 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318881592] [2021-11-09 09:47:09,127 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 09:47:09,127 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:47:09,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:47:09,128 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:47:09,153 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-09 09:47:09,629 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 09:47:09,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:47:09,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-09 09:47:09,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:47:09,821 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-09 09:47:09,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318881592] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:47:09,822 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:47:09,822 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-11-09 09:47:09,822 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091175995] [2021-11-09 09:47:09,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-09 09:47:09,822 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:47:09,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-09 09:47:09,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-11-09 09:47:09,823 INFO L87 Difference]: Start difference. First operand 497 states and 663 transitions. Second operand has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:47:10,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:47:10,057 INFO L93 Difference]: Finished difference Result 771 states and 1019 transitions. [2021-11-09 09:47:10,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-09 09:47:10,058 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-11-09 09:47:10,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:47:10,063 INFO L225 Difference]: With dead ends: 771 [2021-11-09 09:47:10,063 INFO L226 Difference]: Without dead ends: 508 [2021-11-09 09:47:10,065 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-11-09 09:47:10,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2021-11-09 09:47:10,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 424. [2021-11-09 09:47:10,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 423 states have (on average 1.3167848699763594) internal successors, (557), 423 states have internal predecessors, (557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:47:10,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 557 transitions. [2021-11-09 09:47:10,143 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 557 transitions. Word has length 39 [2021-11-09 09:47:10,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:47:10,143 INFO L470 AbstractCegarLoop]: Abstraction has 424 states and 557 transitions. [2021-11-09 09:47:10,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:47:10,144 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 557 transitions. [2021-11-09 09:47:10,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-09 09:47:10,145 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:47:10,145 INFO L513 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] [2021-11-09 09:47:10,188 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-09 09:47:10,369 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-09 09:47:10,369 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:47:10,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:47:10,369 INFO L85 PathProgramCache]: Analyzing trace with hash -1417472424, now seen corresponding path program 5 times [2021-11-09 09:47:10,370 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:47:10,370 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193299118] [2021-11-09 09:47:10,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:47:10,370 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:47:10,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:47:10,484 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-09 09:47:10,484 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:47:10,485 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193299118] [2021-11-09 09:47:10,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193299118] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:47:10,485 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550899156] [2021-11-09 09:47:10,485 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 09:47:10,486 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:47:10,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:47:10,489 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:47:10,508 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-09 09:47:11,015 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-11-09 09:47:11,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:47:11,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-09 09:47:11,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:47:11,220 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-09 09:47:11,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550899156] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:47:11,221 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:47:11,221 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-11-09 09:47:11,221 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613004547] [2021-11-09 09:47:11,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-09 09:47:11,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:47:11,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-09 09:47:11,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-11-09 09:47:11,222 INFO L87 Difference]: Start difference. First operand 424 states and 557 transitions. Second operand has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 13 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:47:11,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:47:11,484 INFO L93 Difference]: Finished difference Result 488 states and 639 transitions. [2021-11-09 09:47:11,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-09 09:47:11,485 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 13 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-11-09 09:47:11,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:47:11,487 INFO L225 Difference]: With dead ends: 488 [2021-11-09 09:47:11,488 INFO L226 Difference]: Without dead ends: 392 [2021-11-09 09:47:11,488 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=102, Invalid=278, Unknown=0, NotChecked=0, Total=380 [2021-11-09 09:47:11,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2021-11-09 09:47:11,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 358. [2021-11-09 09:47:11,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 357 states have (on average 1.3137254901960784) internal successors, (469), 357 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:47:11,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 469 transitions. [2021-11-09 09:47:11,555 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 469 transitions. Word has length 39 [2021-11-09 09:47:11,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:47:11,555 INFO L470 AbstractCegarLoop]: Abstraction has 358 states and 469 transitions. [2021-11-09 09:47:11,555 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 13 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:47:11,556 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 469 transitions. [2021-11-09 09:47:11,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-09 09:47:11,557 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:47:11,557 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:47:11,595 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-09 09:47:11,773 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-09 09:47:11,773 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:47:11,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:47:11,773 INFO L85 PathProgramCache]: Analyzing trace with hash 1666293509, now seen corresponding path program 1 times [2021-11-09 09:47:11,774 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:47:11,774 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069918115] [2021-11-09 09:47:11,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:47:11,774 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:47:11,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:47:11,858 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-09 09:47:11,859 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:47:11,859 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069918115] [2021-11-09 09:47:11,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069918115] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:47:11,859 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833731563] [2021-11-09 09:47:11,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:47:11,860 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:47:11,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:47:11,861 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:47:11,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-09 09:47:12,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:47:12,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-09 09:47:12,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:47:12,578 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-09 09:47:12,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833731563] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:47:12,578 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:47:12,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-11-09 09:47:12,578 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220142418] [2021-11-09 09:47:12,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-09 09:47:12,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:47:12,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-09 09:47:12,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-11-09 09:47:12,580 INFO L87 Difference]: Start difference. First operand 358 states and 469 transitions. Second operand has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:47:12,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:47:12,758 INFO L93 Difference]: Finished difference Result 404 states and 530 transitions. [2021-11-09 09:47:12,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-09 09:47:12,765 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-11-09 09:47:12,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:47:12,768 INFO L225 Difference]: With dead ends: 404 [2021-11-09 09:47:12,768 INFO L226 Difference]: Without dead ends: 349 [2021-11-09 09:47:12,769 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2021-11-09 09:47:12,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2021-11-09 09:47:12,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 308. [2021-11-09 09:47:12,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 307 states have (on average 1.3517915309446253) internal successors, (415), 307 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:47:12,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 415 transitions. [2021-11-09 09:47:12,821 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 415 transitions. Word has length 40 [2021-11-09 09:47:12,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:47:12,821 INFO L470 AbstractCegarLoop]: Abstraction has 308 states and 415 transitions. [2021-11-09 09:47:12,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:47:12,822 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 415 transitions. [2021-11-09 09:47:12,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-09 09:47:12,823 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:47:12,823 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:47:12,856 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-09 09:47:13,037 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-09 09:47:13,037 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:47:13,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:47:13,038 INFO L85 PathProgramCache]: Analyzing trace with hash 825189825, now seen corresponding path program 6 times [2021-11-09 09:47:13,038 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:47:13,038 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364099132] [2021-11-09 09:47:13,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:47:13,038 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:47:13,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:47:13,116 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-09 09:47:13,117 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:47:13,117 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364099132] [2021-11-09 09:47:13,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364099132] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:47:13,118 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166153807] [2021-11-09 09:47:13,118 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 09:47:13,118 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:47:13,118 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:47:13,119 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:47:13,145 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-09 09:47:13,969 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-11-09 09:47:13,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:47:13,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-09 09:47:13,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:47:14,181 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-09 09:47:14,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166153807] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:47:14,182 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:47:14,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-11-09 09:47:14,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149632299] [2021-11-09 09:47:14,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-09 09:47:14,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:47:14,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-09 09:47:14,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-11-09 09:47:14,184 INFO L87 Difference]: Start difference. First operand 308 states and 415 transitions. Second operand has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 11 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:47:14,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:47:14,384 INFO L93 Difference]: Finished difference Result 385 states and 513 transitions. [2021-11-09 09:47:14,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-09 09:47:14,385 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 11 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-11-09 09:47:14,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:47:14,388 INFO L225 Difference]: With dead ends: 385 [2021-11-09 09:47:14,388 INFO L226 Difference]: Without dead ends: 311 [2021-11-09 09:47:14,389 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2021-11-09 09:47:14,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2021-11-09 09:47:14,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 308. [2021-11-09 09:47:14,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 307 states have (on average 1.3322475570032573) internal successors, (409), 307 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:47:14,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 409 transitions. [2021-11-09 09:47:14,445 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 409 transitions. Word has length 45 [2021-11-09 09:47:14,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:47:14,445 INFO L470 AbstractCegarLoop]: Abstraction has 308 states and 409 transitions. [2021-11-09 09:47:14,446 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 11 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:47:14,446 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 409 transitions. [2021-11-09 09:47:14,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-09 09:47:14,447 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:47:14,447 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:47:14,493 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-09 09:47:14,662 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:47:14,663 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:47:14,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:47:14,663 INFO L85 PathProgramCache]: Analyzing trace with hash -159905373, now seen corresponding path program 7 times [2021-11-09 09:47:14,664 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:47:14,664 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033613411] [2021-11-09 09:47:14,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:47:14,664 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:47:14,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:47:15,340 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-09 09:47:15,340 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:47:15,341 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033613411] [2021-11-09 09:47:15,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033613411] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:47:15,341 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330298448] [2021-11-09 09:47:15,341 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 09:47:15,341 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:47:15,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:47:15,343 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:47:15,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-09 09:47:16,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:47:16,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-09 09:47:16,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:47:17,528 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-09 09:47:17,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330298448] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:47:17,529 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:47:17,529 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 22 [2021-11-09 09:47:17,529 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670792069] [2021-11-09 09:47:17,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-09 09:47:17,530 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:47:17,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-09 09:47:17,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2021-11-09 09:47:17,531 INFO L87 Difference]: Start difference. First operand 308 states and 409 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:47:18,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:47:18,219 INFO L93 Difference]: Finished difference Result 670 states and 855 transitions. [2021-11-09 09:47:18,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-09 09:47:18,220 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-11-09 09:47:18,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:47:18,223 INFO L225 Difference]: With dead ends: 670 [2021-11-09 09:47:18,224 INFO L226 Difference]: Without dead ends: 665 [2021-11-09 09:47:18,224 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 37 SyntacticMatches, 8 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2021-11-09 09:47:18,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2021-11-09 09:47:18,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 375. [2021-11-09 09:47:18,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 374 states have (on average 1.3475935828877006) internal successors, (504), 374 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:47:18,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 504 transitions. [2021-11-09 09:47:18,281 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 504 transitions. Word has length 47 [2021-11-09 09:47:18,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:47:18,281 INFO L470 AbstractCegarLoop]: Abstraction has 375 states and 504 transitions. [2021-11-09 09:47:18,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:47:18,282 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 504 transitions. [2021-11-09 09:47:18,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-09 09:47:18,283 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:47:18,283 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:47:18,319 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-09 09:47:18,505 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:47:18,505 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:47:18,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:47:18,505 INFO L85 PathProgramCache]: Analyzing trace with hash 1615101989, now seen corresponding path program 2 times [2021-11-09 09:47:18,505 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:47:18,506 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198150697] [2021-11-09 09:47:18,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:47:18,506 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:47:18,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:47:19,286 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 30 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-09 09:47:19,286 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:47:19,286 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198150697] [2021-11-09 09:47:19,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198150697] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:47:19,286 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225539470] [2021-11-09 09:47:19,286 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:47:19,287 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:47:19,287 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:47:19,288 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:47:19,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-09 09:47:19,904 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:47:19,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:47:19,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 45 conjunts are in the unsatisfiable core [2021-11-09 09:47:19,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:47:20,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-09 09:47:20,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-11-09 09:47:20,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-09 09:47:20,589 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-09 09:47:20,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225539470] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:47:20,589 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:47:20,590 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 28 [2021-11-09 09:47:20,590 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235012253] [2021-11-09 09:47:20,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-09 09:47:20,590 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:47:20,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-09 09:47:20,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=666, Unknown=0, NotChecked=0, Total=756 [2021-11-09 09:47:20,592 INFO L87 Difference]: Start difference. First operand 375 states and 504 transitions. Second operand has 28 states, 28 states have (on average 2.357142857142857) internal successors, (66), 28 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:47:24,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:47:24,232 INFO L93 Difference]: Finished difference Result 902 states and 1169 transitions. [2021-11-09 09:47:24,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-11-09 09:47:24,232 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.357142857142857) internal successors, (66), 28 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-11-09 09:47:24,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:47:24,236 INFO L225 Difference]: With dead ends: 902 [2021-11-09 09:47:24,236 INFO L226 Difference]: Without dead ends: 836 [2021-11-09 09:47:24,239 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2439 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1317, Invalid=7055, Unknown=0, NotChecked=0, Total=8372 [2021-11-09 09:47:24,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 836 states. [2021-11-09 09:47:24,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 836 to 485. [2021-11-09 09:47:24,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 485 states, 484 states have (on average 1.3243801652892562) internal successors, (641), 484 states have internal predecessors, (641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:47:24,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 641 transitions. [2021-11-09 09:47:24,328 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 641 transitions. Word has length 47 [2021-11-09 09:47:24,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:47:24,328 INFO L470 AbstractCegarLoop]: Abstraction has 485 states and 641 transitions. [2021-11-09 09:47:24,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.357142857142857) internal successors, (66), 28 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:47:24,328 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 641 transitions. [2021-11-09 09:47:24,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-09 09:47:24,330 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:47:24,330 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:47:24,369 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-09 09:47:24,557 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:47:24,557 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:47:24,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:47:24,557 INFO L85 PathProgramCache]: Analyzing trace with hash -552932383, now seen corresponding path program 3 times [2021-11-09 09:47:24,557 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:47:24,557 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160089557] [2021-11-09 09:47:24,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:47:24,558 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:47:24,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:47:25,195 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 9 proven. 17 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-09 09:47:25,195 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:47:25,195 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160089557] [2021-11-09 09:47:25,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160089557] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:47:25,196 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135044129] [2021-11-09 09:47:25,196 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 09:47:25,196 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:47:25,196 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:47:25,201 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:47:25,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-09 09:47:25,951 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-09 09:47:25,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:47:25,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 54 conjunts are in the unsatisfiable core [2021-11-09 09:47:25,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:47:26,247 INFO L354 Elim1Store]: treesize reduction 81, result has 33.1 percent of original size [2021-11-09 09:47:26,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 62 [2021-11-09 09:47:28,057 INFO L354 Elim1Store]: treesize reduction 92, result has 20.7 percent of original size [2021-11-09 09:47:28,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 48 [2021-11-09 09:47:28,269 INFO L354 Elim1Store]: treesize reduction 216, result has 14.3 percent of original size [2021-11-09 09:47:28,270 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 9 case distinctions, treesize of input 66 treesize of output 63 [2021-11-09 09:47:28,608 INFO L354 Elim1Store]: treesize reduction 159, result has 7.6 percent of original size [2021-11-09 09:47:28,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 53 treesize of output 41 [2021-11-09 09:47:28,772 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 09:47:28,772 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 23 treesize of output 23 [2021-11-09 09:47:29,063 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 9 proven. 26 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-09 09:47:29,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135044129] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:47:29,063 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:47:29,063 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 25] total 38 [2021-11-09 09:47:29,064 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888234952] [2021-11-09 09:47:29,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-11-09 09:47:29,064 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:47:29,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-11-09 09:47:29,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1281, Unknown=0, NotChecked=0, Total=1406 [2021-11-09 09:47:29,065 INFO L87 Difference]: Start difference. First operand 485 states and 641 transitions. Second operand has 38 states, 38 states have (on average 2.0526315789473686) internal successors, (78), 38 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:47:49,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:47:49,911 INFO L93 Difference]: Finished difference Result 1184 states and 1570 transitions. [2021-11-09 09:47:49,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-11-09 09:47:49,913 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.0526315789473686) internal successors, (78), 38 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-11-09 09:47:49,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:47:49,918 INFO L225 Difference]: With dead ends: 1184 [2021-11-09 09:47:49,918 INFO L226 Difference]: Without dead ends: 1125 [2021-11-09 09:47:49,924 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4452 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=1794, Invalid=13212, Unknown=0, NotChecked=0, Total=15006 [2021-11-09 09:47:49,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1125 states. [2021-11-09 09:47:50,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1125 to 622. [2021-11-09 09:47:50,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 622 states, 621 states have (on average 1.3043478260869565) internal successors, (810), 621 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:47:50,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 622 states to 622 states and 810 transitions. [2021-11-09 09:47:50,050 INFO L78 Accepts]: Start accepts. Automaton has 622 states and 810 transitions. Word has length 47 [2021-11-09 09:47:50,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:47:50,051 INFO L470 AbstractCegarLoop]: Abstraction has 622 states and 810 transitions. [2021-11-09 09:47:50,051 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.0526315789473686) internal successors, (78), 38 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:47:50,051 INFO L276 IsEmpty]: Start isEmpty. Operand 622 states and 810 transitions. [2021-11-09 09:47:50,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-09 09:47:50,053 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:47:50,053 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:47:50,092 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-09 09:47:50,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:47:50,275 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:47:50,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:47:50,275 INFO L85 PathProgramCache]: Analyzing trace with hash -19356763, now seen corresponding path program 2 times [2021-11-09 09:47:50,275 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:47:50,275 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115234948] [2021-11-09 09:47:50,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:47:50,276 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:47:50,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:47:51,045 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 9 proven. 29 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-09 09:47:51,045 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:47:51,046 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115234948] [2021-11-09 09:47:51,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115234948] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:47:51,046 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070524341] [2021-11-09 09:47:51,046 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:47:51,046 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:47:51,047 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:47:51,049 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:47:51,054 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-09 09:47:51,814 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:47:51,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:47:51,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 51 conjunts are in the unsatisfiable core [2021-11-09 09:47:51,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:47:52,303 INFO L354 Elim1Store]: treesize reduction 84, result has 20.8 percent of original size [2021-11-09 09:47:52,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 39 [2021-11-09 09:47:52,441 INFO L354 Elim1Store]: treesize reduction 78, result has 17.9 percent of original size [2021-11-09 09:47:52,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 45 treesize of output 35 [2021-11-09 09:47:52,560 INFO L354 Elim1Store]: treesize reduction 86, result has 9.5 percent of original size [2021-11-09 09:47:52,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 37 [2021-11-09 09:47:52,645 INFO L354 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2021-11-09 09:47:52,646 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 24 treesize of output 13 [2021-11-09 09:47:52,690 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-09 09:47:52,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2070524341] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:47:52,690 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:47:52,691 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 39 [2021-11-09 09:47:52,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772788896] [2021-11-09 09:47:52,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-11-09 09:47:52,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:47:52,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-11-09 09:47:52,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1349, Unknown=0, NotChecked=0, Total=1482 [2021-11-09 09:47:52,693 INFO L87 Difference]: Start difference. First operand 622 states and 810 transitions. Second operand has 39 states, 39 states have (on average 2.1025641025641026) internal successors, (82), 39 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:47:55,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:47:55,946 INFO L93 Difference]: Finished difference Result 1124 states and 1472 transitions. [2021-11-09 09:47:55,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-11-09 09:47:55,946 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.1025641025641026) internal successors, (82), 39 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-11-09 09:47:55,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:47:55,951 INFO L225 Difference]: With dead ends: 1124 [2021-11-09 09:47:55,951 INFO L226 Difference]: Without dead ends: 1072 [2021-11-09 09:47:55,954 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1687 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=835, Invalid=5171, Unknown=0, NotChecked=0, Total=6006 [2021-11-09 09:47:55,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1072 states. [2021-11-09 09:47:56,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1072 to 786. [2021-11-09 09:47:56,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 786 states, 785 states have (on average 1.3070063694267515) internal successors, (1026), 785 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:47:56,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 786 states to 786 states and 1026 transitions. [2021-11-09 09:47:56,138 INFO L78 Accepts]: Start accepts. Automaton has 786 states and 1026 transitions. Word has length 47 [2021-11-09 09:47:56,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:47:56,138 INFO L470 AbstractCegarLoop]: Abstraction has 786 states and 1026 transitions. [2021-11-09 09:47:56,138 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.1025641025641026) internal successors, (82), 39 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:47:56,139 INFO L276 IsEmpty]: Start isEmpty. Operand 786 states and 1026 transitions. [2021-11-09 09:47:56,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-09 09:47:56,143 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:47:56,143 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:47:56,181 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-09 09:47:56,369 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-09 09:47:56,369 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:47:56,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:47:56,369 INFO L85 PathProgramCache]: Analyzing trace with hash 499626149, now seen corresponding path program 2 times [2021-11-09 09:47:56,369 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:47:56,369 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573591094] [2021-11-09 09:47:56,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:47:56,370 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:47:56,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:47:57,056 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 1 proven. 27 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-09 09:47:57,057 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:47:57,057 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573591094] [2021-11-09 09:47:57,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573591094] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:47:57,057 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485935390] [2021-11-09 09:47:57,057 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:47:57,057 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:47:57,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:47:57,061 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:47:57,084 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-09 09:47:57,924 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:47:57,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:47:57,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-09 09:47:57,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:47:58,114 INFO L354 Elim1Store]: treesize reduction 86, result has 16.5 percent of original size [2021-11-09 09:47:58,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 32 [2021-11-09 09:47:58,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2021-11-09 09:47:58,319 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 19 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-09 09:47:58,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485935390] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:47:58,319 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:47:58,319 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 11] total 26 [2021-11-09 09:47:58,319 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26425687] [2021-11-09 09:47:58,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-09 09:47:58,320 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:47:58,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-09 09:47:58,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2021-11-09 09:47:58,321 INFO L87 Difference]: Start difference. First operand 786 states and 1026 transitions. Second operand has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:48:01,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:48:01,572 INFO L93 Difference]: Finished difference Result 1590 states and 2092 transitions. [2021-11-09 09:48:01,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-11-09 09:48:01,573 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-11-09 09:48:01,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:48:01,578 INFO L225 Difference]: With dead ends: 1590 [2021-11-09 09:48:01,578 INFO L226 Difference]: Without dead ends: 1350 [2021-11-09 09:48:01,580 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1297 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=847, Invalid=4555, Unknown=0, NotChecked=0, Total=5402 [2021-11-09 09:48:01,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1350 states. [2021-11-09 09:48:01,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1350 to 942. [2021-11-09 09:48:01,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 942 states, 941 states have (on average 1.3092454835281615) internal successors, (1232), 941 states have internal predecessors, (1232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:48:01,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 942 states to 942 states and 1232 transitions. [2021-11-09 09:48:01,787 INFO L78 Accepts]: Start accepts. Automaton has 942 states and 1232 transitions. Word has length 47 [2021-11-09 09:48:01,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:48:01,787 INFO L470 AbstractCegarLoop]: Abstraction has 942 states and 1232 transitions. [2021-11-09 09:48:01,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:48:01,788 INFO L276 IsEmpty]: Start isEmpty. Operand 942 states and 1232 transitions. [2021-11-09 09:48:01,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-09 09:48:01,790 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:48:01,791 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:48:01,833 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-09 09:48:02,009 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-11-09 09:48:02,010 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:48:02,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:48:02,010 INFO L85 PathProgramCache]: Analyzing trace with hash 247147749, now seen corresponding path program 3 times [2021-11-09 09:48:02,010 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:48:02,010 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551163170] [2021-11-09 09:48:02,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:48:02,010 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:48:02,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:48:02,418 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-09 09:48:02,418 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:48:02,419 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551163170] [2021-11-09 09:48:02,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551163170] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:48:02,419 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246865105] [2021-11-09 09:48:02,419 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 09:48:02,419 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:48:02,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:48:02,445 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:48:02,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-09 09:48:03,186 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-09 09:48:03,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:48:03,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-09 09:48:03,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:48:04,210 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-09 09:48:04,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246865105] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:48:04,211 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:48:04,211 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 18 [2021-11-09 09:48:04,211 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748508462] [2021-11-09 09:48:04,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-09 09:48:04,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:48:04,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-09 09:48:04,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-11-09 09:48:04,212 INFO L87 Difference]: Start difference. First operand 942 states and 1232 transitions. Second operand has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:48:05,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:48:05,152 INFO L93 Difference]: Finished difference Result 1588 states and 2020 transitions. [2021-11-09 09:48:05,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-09 09:48:05,153 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-11-09 09:48:05,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:48:05,158 INFO L225 Difference]: With dead ends: 1588 [2021-11-09 09:48:05,158 INFO L226 Difference]: Without dead ends: 1583 [2021-11-09 09:48:05,159 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 39 SyntacticMatches, 10 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2021-11-09 09:48:05,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1583 states. [2021-11-09 09:48:05,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1583 to 1040. [2021-11-09 09:48:05,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1040 states, 1039 states have (on average 1.3051010587102985) internal successors, (1356), 1039 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:48:05,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1040 states to 1040 states and 1356 transitions. [2021-11-09 09:48:05,390 INFO L78 Accepts]: Start accepts. Automaton has 1040 states and 1356 transitions. Word has length 47 [2021-11-09 09:48:05,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:48:05,390 INFO L470 AbstractCegarLoop]: Abstraction has 1040 states and 1356 transitions. [2021-11-09 09:48:05,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:48:05,390 INFO L276 IsEmpty]: Start isEmpty. Operand 1040 states and 1356 transitions. [2021-11-09 09:48:05,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-09 09:48:05,393 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:48:05,393 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:48:05,431 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-09 09:48:05,621 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:48:05,621 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:48:05,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:48:05,621 INFO L85 PathProgramCache]: Analyzing trace with hash -830112797, now seen corresponding path program 2 times [2021-11-09 09:48:05,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:48:05,621 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375002691] [2021-11-09 09:48:05,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:48:05,622 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:48:05,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:48:06,238 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 30 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-09 09:48:06,239 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:48:06,239 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375002691] [2021-11-09 09:48:06,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375002691] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:48:06,239 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280563660] [2021-11-09 09:48:06,239 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:48:06,239 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:48:06,239 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:48:06,241 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:48:06,261 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-09 09:48:06,996 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:48:06,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:48:06,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 45 conjunts are in the unsatisfiable core [2021-11-09 09:48:06,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:48:07,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-11-09 09:48:07,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-09 09:48:07,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-11-09 09:48:07,597 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-09 09:48:07,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [280563660] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:48:07,598 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:48:07,598 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 26 [2021-11-09 09:48:07,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366509325] [2021-11-09 09:48:07,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-09 09:48:07,598 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:48:07,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-09 09:48:07,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2021-11-09 09:48:07,599 INFO L87 Difference]: Start difference. First operand 1040 states and 1356 transitions. Second operand has 26 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 26 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:48:09,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:48:09,217 INFO L93 Difference]: Finished difference Result 1364 states and 1746 transitions. [2021-11-09 09:48:09,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-09 09:48:09,218 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 26 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-11-09 09:48:09,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:48:09,222 INFO L225 Difference]: With dead ends: 1364 [2021-11-09 09:48:09,222 INFO L226 Difference]: Without dead ends: 1356 [2021-11-09 09:48:09,224 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 35 SyntacticMatches, 5 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 631 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=493, Invalid=2057, Unknown=0, NotChecked=0, Total=2550 [2021-11-09 09:48:09,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1356 states. [2021-11-09 09:48:09,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1356 to 1131. [2021-11-09 09:48:09,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1131 states, 1130 states have (on average 1.297345132743363) internal successors, (1466), 1130 states have internal predecessors, (1466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:48:09,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1131 states to 1131 states and 1466 transitions. [2021-11-09 09:48:09,475 INFO L78 Accepts]: Start accepts. Automaton has 1131 states and 1466 transitions. Word has length 47 [2021-11-09 09:48:09,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:48:09,476 INFO L470 AbstractCegarLoop]: Abstraction has 1131 states and 1466 transitions. [2021-11-09 09:48:09,476 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 26 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:48:09,476 INFO L276 IsEmpty]: Start isEmpty. Operand 1131 states and 1466 transitions. [2021-11-09 09:48:09,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-09 09:48:09,479 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:48:09,479 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:48:09,519 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-09 09:48:09,693 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-11-09 09:48:09,693 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:48:09,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:48:09,693 INFO L85 PathProgramCache]: Analyzing trace with hash 944894565, now seen corresponding path program 4 times [2021-11-09 09:48:09,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:48:09,693 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174528881] [2021-11-09 09:48:09,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:48:09,694 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:48:09,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:48:10,141 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-09 09:48:10,141 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:48:10,141 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174528881] [2021-11-09 09:48:10,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174528881] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:48:10,142 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490426359] [2021-11-09 09:48:10,142 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 09:48:10,142 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:48:10,142 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:48:10,144 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:48:10,145 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-09 09:48:10,899 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 09:48:10,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:48:10,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-09 09:48:10,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:48:11,694 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-09 09:48:11,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490426359] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:48:11,695 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:48:11,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 18 [2021-11-09 09:48:11,695 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328271251] [2021-11-09 09:48:11,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-09 09:48:11,695 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:48:11,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-09 09:48:11,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-11-09 09:48:11,696 INFO L87 Difference]: Start difference. First operand 1131 states and 1466 transitions. Second operand has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:48:12,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:48:12,603 INFO L93 Difference]: Finished difference Result 1669 states and 2112 transitions. [2021-11-09 09:48:12,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-09 09:48:12,603 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-11-09 09:48:12,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:48:12,609 INFO L225 Difference]: With dead ends: 1669 [2021-11-09 09:48:12,609 INFO L226 Difference]: Without dead ends: 1664 [2021-11-09 09:48:12,613 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 40 SyntacticMatches, 9 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2021-11-09 09:48:12,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1664 states. [2021-11-09 09:48:12,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1664 to 1265. [2021-11-09 09:48:12,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1265 states, 1264 states have (on average 1.3006329113924051) internal successors, (1644), 1264 states have internal predecessors, (1644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:48:12,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1265 states to 1265 states and 1644 transitions. [2021-11-09 09:48:12,897 INFO L78 Accepts]: Start accepts. Automaton has 1265 states and 1644 transitions. Word has length 47 [2021-11-09 09:48:12,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:48:12,897 INFO L470 AbstractCegarLoop]: Abstraction has 1265 states and 1644 transitions. [2021-11-09 09:48:12,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:48:12,897 INFO L276 IsEmpty]: Start isEmpty. Operand 1265 states and 1644 transitions. [2021-11-09 09:48:12,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-09 09:48:12,900 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:48:12,901 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:48:12,929 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-09 09:48:13,117 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-09 09:48:13,117 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:48:13,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:48:13,117 INFO L85 PathProgramCache]: Analyzing trace with hash 1351947687, now seen corresponding path program 5 times [2021-11-09 09:48:13,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:48:13,118 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567369575] [2021-11-09 09:48:13,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:48:13,118 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:48:13,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:48:13,467 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-09 09:48:13,467 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:48:13,467 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567369575] [2021-11-09 09:48:13,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567369575] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:48:13,467 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602639716] [2021-11-09 09:48:13,467 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 09:48:13,468 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:48:13,468 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:48:13,468 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:48:13,469 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-09 09:48:14,334 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-11-09 09:48:14,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:48:14,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-09 09:48:14,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:48:15,057 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-09 09:48:15,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602639716] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:48:15,058 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:48:15,058 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-11-09 09:48:15,058 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990156733] [2021-11-09 09:48:15,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-09 09:48:15,059 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:48:15,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-09 09:48:15,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-11-09 09:48:15,060 INFO L87 Difference]: Start difference. First operand 1265 states and 1644 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:48:15,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:48:15,963 INFO L93 Difference]: Finished difference Result 2051 states and 2617 transitions. [2021-11-09 09:48:15,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-09 09:48:15,963 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-11-09 09:48:15,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:48:15,971 INFO L225 Difference]: With dead ends: 2051 [2021-11-09 09:48:15,971 INFO L226 Difference]: Without dead ends: 2046 [2021-11-09 09:48:15,972 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 39 SyntacticMatches, 11 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2021-11-09 09:48:15,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2046 states. [2021-11-09 09:48:16,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2046 to 1400. [2021-11-09 09:48:16,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1400 states, 1399 states have (on average 1.2994996426018586) internal successors, (1818), 1399 states have internal predecessors, (1818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:48:16,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1400 states to 1400 states and 1818 transitions. [2021-11-09 09:48:16,247 INFO L78 Accepts]: Start accepts. Automaton has 1400 states and 1818 transitions. Word has length 47 [2021-11-09 09:48:16,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:48:16,247 INFO L470 AbstractCegarLoop]: Abstraction has 1400 states and 1818 transitions. [2021-11-09 09:48:16,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:48:16,247 INFO L276 IsEmpty]: Start isEmpty. Operand 1400 states and 1818 transitions. [2021-11-09 09:48:16,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-09 09:48:16,250 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:48:16,250 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:48:16,308 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-09 09:48:16,465 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-09 09:48:16,465 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:48:16,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:48:16,465 INFO L85 PathProgramCache]: Analyzing trace with hash 2141389541, now seen corresponding path program 6 times [2021-11-09 09:48:16,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:48:16,465 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016962877] [2021-11-09 09:48:16,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:48:16,466 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:48:16,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:48:16,794 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-09 09:48:16,794 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:48:16,794 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016962877] [2021-11-09 09:48:16,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016962877] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:48:16,794 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896589181] [2021-11-09 09:48:16,794 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 09:48:16,795 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:48:16,795 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:48:16,799 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:48:16,800 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-09 09:48:17,713 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-11-09 09:48:17,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:48:17,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-09 09:48:17,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:48:18,380 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-09 09:48:18,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896589181] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:48:18,381 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:48:18,381 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 18 [2021-11-09 09:48:18,381 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291436773] [2021-11-09 09:48:18,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-09 09:48:18,382 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:48:18,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-09 09:48:18,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-11-09 09:48:18,383 INFO L87 Difference]: Start difference. First operand 1400 states and 1818 transitions. Second operand has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:48:19,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:48:19,411 INFO L93 Difference]: Finished difference Result 2122 states and 2710 transitions. [2021-11-09 09:48:19,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-09 09:48:19,412 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-11-09 09:48:19,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:48:19,420 INFO L225 Difference]: With dead ends: 2122 [2021-11-09 09:48:19,420 INFO L226 Difference]: Without dead ends: 2117 [2021-11-09 09:48:19,420 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 40 SyntacticMatches, 9 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2021-11-09 09:48:19,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2117 states. [2021-11-09 09:48:19,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2117 to 1498. [2021-11-09 09:48:19,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1498 states, 1497 states have (on average 1.3026052104208417) internal successors, (1950), 1497 states have internal predecessors, (1950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:48:19,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1498 states to 1498 states and 1950 transitions. [2021-11-09 09:48:19,723 INFO L78 Accepts]: Start accepts. Automaton has 1498 states and 1950 transitions. Word has length 47 [2021-11-09 09:48:19,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:48:19,723 INFO L470 AbstractCegarLoop]: Abstraction has 1498 states and 1950 transitions. [2021-11-09 09:48:19,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:48:19,723 INFO L276 IsEmpty]: Start isEmpty. Operand 1498 states and 1950 transitions. [2021-11-09 09:48:19,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-09 09:48:19,725 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:48:19,725 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:48:19,747 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-09 09:48:19,925 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-09 09:48:19,926 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:48:19,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:48:19,926 INFO L85 PathProgramCache]: Analyzing trace with hash -1746524633, now seen corresponding path program 7 times [2021-11-09 09:48:19,926 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:48:19,926 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92608335] [2021-11-09 09:48:19,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:48:19,926 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:48:19,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:48:20,271 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-09 09:48:20,271 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:48:20,271 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92608335] [2021-11-09 09:48:20,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92608335] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:48:20,272 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936739378] [2021-11-09 09:48:20,273 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 09:48:20,273 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:48:20,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:48:20,273 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:48:20,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-09 09:48:21,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:48:21,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-09 09:48:21,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:48:22,108 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-09 09:48:22,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936739378] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:48:22,109 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:48:22,109 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-11-09 09:48:22,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729387046] [2021-11-09 09:48:22,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-09 09:48:22,110 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:48:22,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-09 09:48:22,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-11-09 09:48:22,110 INFO L87 Difference]: Start difference. First operand 1498 states and 1950 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:48:23,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:48:23,020 INFO L93 Difference]: Finished difference Result 1966 states and 2513 transitions. [2021-11-09 09:48:23,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-09 09:48:23,020 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-11-09 09:48:23,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:48:23,027 INFO L225 Difference]: With dead ends: 1966 [2021-11-09 09:48:23,028 INFO L226 Difference]: Without dead ends: 1961 [2021-11-09 09:48:23,028 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 40 SyntacticMatches, 10 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2021-11-09 09:48:23,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1961 states. [2021-11-09 09:48:23,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1961 to 1624. [2021-11-09 09:48:23,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1624 states, 1623 states have (on average 1.3019100431300061) internal successors, (2113), 1623 states have internal predecessors, (2113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:48:23,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1624 states to 1624 states and 2113 transitions. [2021-11-09 09:48:23,384 INFO L78 Accepts]: Start accepts. Automaton has 1624 states and 2113 transitions. Word has length 47 [2021-11-09 09:48:23,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:48:23,384 INFO L470 AbstractCegarLoop]: Abstraction has 1624 states and 2113 transitions. [2021-11-09 09:48:23,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:48:23,385 INFO L276 IsEmpty]: Start isEmpty. Operand 1624 states and 2113 transitions. [2021-11-09 09:48:23,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-09 09:48:23,388 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:48:23,388 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:48:23,413 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-09 09:48:23,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:48:23,593 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:48:23,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:48:23,594 INFO L85 PathProgramCache]: Analyzing trace with hash -1048777817, now seen corresponding path program 8 times [2021-11-09 09:48:23,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:48:23,594 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762869656] [2021-11-09 09:48:23,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:48:23,594 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:48:23,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:48:23,977 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-09 09:48:23,978 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:48:23,978 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762869656] [2021-11-09 09:48:23,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762869656] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:48:23,978 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694007832] [2021-11-09 09:48:23,978 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:48:23,978 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:48:23,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:48:23,979 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:48:23,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-09 09:48:25,098 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:48:25,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:48:25,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-09 09:48:25,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:48:25,648 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-09 09:48:25,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694007832] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:48:25,648 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:48:25,649 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-11-09 09:48:25,649 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61178416] [2021-11-09 09:48:25,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-09 09:48:25,649 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:48:25,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-09 09:48:25,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-11-09 09:48:25,650 INFO L87 Difference]: Start difference. First operand 1624 states and 2113 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:48:26,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:48:26,763 INFO L93 Difference]: Finished difference Result 2275 states and 2910 transitions. [2021-11-09 09:48:26,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-09 09:48:26,764 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-11-09 09:48:26,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:48:26,772 INFO L225 Difference]: With dead ends: 2275 [2021-11-09 09:48:26,772 INFO L226 Difference]: Without dead ends: 2270 [2021-11-09 09:48:26,773 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 41 SyntacticMatches, 9 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2021-11-09 09:48:26,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2270 states. [2021-11-09 09:48:27,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2270 to 1717. [2021-11-09 09:48:27,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1717 states, 1716 states have (on average 1.3018648018648018) internal successors, (2234), 1716 states have internal predecessors, (2234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:48:27,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1717 states to 1717 states and 2234 transitions. [2021-11-09 09:48:27,141 INFO L78 Accepts]: Start accepts. Automaton has 1717 states and 2234 transitions. Word has length 47 [2021-11-09 09:48:27,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:48:27,141 INFO L470 AbstractCegarLoop]: Abstraction has 1717 states and 2234 transitions. [2021-11-09 09:48:27,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:48:27,141 INFO L276 IsEmpty]: Start isEmpty. Operand 1717 states and 2234 transitions. [2021-11-09 09:48:27,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-09 09:48:27,144 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:48:27,144 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:48:27,170 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-11-09 09:48:27,345 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:48:27,345 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:48:27,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:48:27,345 INFO L85 PathProgramCache]: Analyzing trace with hash -641724695, now seen corresponding path program 2 times [2021-11-09 09:48:27,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:48:27,346 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334943312] [2021-11-09 09:48:27,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:48:27,346 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:48:27,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:48:27,935 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-09 09:48:27,935 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:48:27,936 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334943312] [2021-11-09 09:48:27,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334943312] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:48:27,936 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758477499] [2021-11-09 09:48:27,936 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:48:27,936 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:48:27,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:48:27,941 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:48:27,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-09 09:48:29,243 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:48:29,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:48:29,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-09 09:48:29,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:48:30,494 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-09 09:48:30,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758477499] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:48:30,495 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:48:30,495 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 22 [2021-11-09 09:48:30,495 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438449279] [2021-11-09 09:48:30,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-09 09:48:30,495 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:48:30,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-09 09:48:30,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2021-11-09 09:48:30,496 INFO L87 Difference]: Start difference. First operand 1717 states and 2234 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:48:32,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:48:32,342 INFO L93 Difference]: Finished difference Result 2665 states and 3405 transitions. [2021-11-09 09:48:32,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-09 09:48:32,343 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-11-09 09:48:32,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:48:32,352 INFO L225 Difference]: With dead ends: 2665 [2021-11-09 09:48:32,352 INFO L226 Difference]: Without dead ends: 2660 [2021-11-09 09:48:32,353 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 39 SyntacticMatches, 6 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2021-11-09 09:48:32,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2660 states. [2021-11-09 09:48:32,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2660 to 1926. [2021-11-09 09:48:32,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1926 states, 1925 states have (on average 1.3075324675324675) internal successors, (2517), 1925 states have internal predecessors, (2517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:48:32,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1926 states to 1926 states and 2517 transitions. [2021-11-09 09:48:32,854 INFO L78 Accepts]: Start accepts. Automaton has 1926 states and 2517 transitions. Word has length 47 [2021-11-09 09:48:32,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:48:32,854 INFO L470 AbstractCegarLoop]: Abstraction has 1926 states and 2517 transitions. [2021-11-09 09:48:32,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:48:32,854 INFO L276 IsEmpty]: Start isEmpty. Operand 1926 states and 2517 transitions. [2021-11-09 09:48:32,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-09 09:48:32,857 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:48:32,857 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:48:32,881 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-11-09 09:48:33,057 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-11-09 09:48:33,058 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:48:33,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:48:33,058 INFO L85 PathProgramCache]: Analyzing trace with hash 1958354755, now seen corresponding path program 4 times [2021-11-09 09:48:33,058 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:48:33,058 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468776217] [2021-11-09 09:48:33,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:48:33,058 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:48:33,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:48:33,138 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-09 09:48:33,138 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:48:33,139 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468776217] [2021-11-09 09:48:33,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468776217] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:48:33,139 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741547284] [2021-11-09 09:48:33,139 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 09:48:33,139 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:48:33,140 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:48:33,140 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:48:33,152 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-09 09:48:34,454 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 09:48:34,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:48:34,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-09 09:48:34,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:48:34,608 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-09 09:48:34,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741547284] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:48:34,608 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:48:34,609 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-11-09 09:48:34,609 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903804113] [2021-11-09 09:48:34,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-09 09:48:34,609 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:48:34,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-09 09:48:34,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-11-09 09:48:34,610 INFO L87 Difference]: Start difference. First operand 1926 states and 2517 transitions. Second operand has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:48:35,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:48:35,396 INFO L93 Difference]: Finished difference Result 2452 states and 3226 transitions. [2021-11-09 09:48:35,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-09 09:48:35,397 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-11-09 09:48:35,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:48:35,406 INFO L225 Difference]: With dead ends: 2452 [2021-11-09 09:48:35,406 INFO L226 Difference]: Without dead ends: 1823 [2021-11-09 09:48:35,407 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=209, Invalid=603, Unknown=0, NotChecked=0, Total=812 [2021-11-09 09:48:35,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1823 states. [2021-11-09 09:48:35,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1823 to 1537. [2021-11-09 09:48:35,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1537 states, 1536 states have (on average 1.2662760416666667) internal successors, (1945), 1536 states have internal predecessors, (1945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:48:35,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1537 states to 1537 states and 1945 transitions. [2021-11-09 09:48:35,731 INFO L78 Accepts]: Start accepts. Automaton has 1537 states and 1945 transitions. Word has length 49 [2021-11-09 09:48:35,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:48:35,731 INFO L470 AbstractCegarLoop]: Abstraction has 1537 states and 1945 transitions. [2021-11-09 09:48:35,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:48:35,732 INFO L276 IsEmpty]: Start isEmpty. Operand 1537 states and 1945 transitions. [2021-11-09 09:48:35,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-09 09:48:35,734 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:48:35,734 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:48:35,761 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-11-09 09:48:35,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:48:35,935 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:48:35,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:48:35,935 INFO L85 PathProgramCache]: Analyzing trace with hash -130172768, now seen corresponding path program 8 times [2021-11-09 09:48:35,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:48:35,935 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822383354] [2021-11-09 09:48:35,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:48:35,935 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:48:35,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:48:36,032 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 15 proven. 19 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-09 09:48:36,032 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:48:36,032 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822383354] [2021-11-09 09:48:36,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822383354] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:48:36,033 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738563609] [2021-11-09 09:48:36,033 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:48:36,034 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:48:36,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:48:36,041 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:48:36,056 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-09 09:48:37,214 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:48:37,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:48:37,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-09 09:48:37,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:48:37,408 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-09 09:48:37,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1738563609] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:48:37,409 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:48:37,409 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-11-09 09:48:37,409 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521655798] [2021-11-09 09:48:37,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-09 09:48:37,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:48:37,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-09 09:48:37,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-11-09 09:48:37,410 INFO L87 Difference]: Start difference. First operand 1537 states and 1945 transitions. Second operand has 16 states, 16 states have (on average 3.5625) internal successors, (57), 16 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:48:37,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:48:37,933 INFO L93 Difference]: Finished difference Result 1830 states and 2352 transitions. [2021-11-09 09:48:37,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-09 09:48:37,938 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 16 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-11-09 09:48:37,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:48:37,944 INFO L225 Difference]: With dead ends: 1830 [2021-11-09 09:48:37,945 INFO L226 Difference]: Without dead ends: 1353 [2021-11-09 09:48:37,946 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2021-11-09 09:48:37,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1353 states. [2021-11-09 09:48:38,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1353 to 1190. [2021-11-09 09:48:38,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1190 states, 1189 states have (on average 1.3145500420521448) internal successors, (1563), 1189 states have internal predecessors, (1563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:48:38,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1190 states to 1190 states and 1563 transitions. [2021-11-09 09:48:38,222 INFO L78 Accepts]: Start accepts. Automaton has 1190 states and 1563 transitions. Word has length 50 [2021-11-09 09:48:38,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:48:38,222 INFO L470 AbstractCegarLoop]: Abstraction has 1190 states and 1563 transitions. [2021-11-09 09:48:38,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 16 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:48:38,222 INFO L276 IsEmpty]: Start isEmpty. Operand 1190 states and 1563 transitions. [2021-11-09 09:48:38,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-09 09:48:38,224 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:48:38,224 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:48:38,248 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-11-09 09:48:38,424 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:48:38,425 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:48:38,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:48:38,425 INFO L85 PathProgramCache]: Analyzing trace with hash 1265236080, now seen corresponding path program 9 times [2021-11-09 09:48:38,425 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:48:38,425 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039042086] [2021-11-09 09:48:38,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:48:38,425 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:48:38,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:48:38,521 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-09 09:48:38,521 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:48:38,521 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039042086] [2021-11-09 09:48:38,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039042086] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:48:38,522 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033617459] [2021-11-09 09:48:38,522 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 09:48:38,522 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:48:38,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:48:38,529 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:48:38,546 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-11-09 09:48:39,672 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-09 09:48:39,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:48:39,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-09 09:48:39,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:48:39,844 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 12 proven. 14 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-09 09:48:39,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033617459] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:48:39,844 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:48:39,844 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 15 [2021-11-09 09:48:39,844 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786906536] [2021-11-09 09:48:39,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-09 09:48:39,845 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:48:39,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-09 09:48:39,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-11-09 09:48:39,845 INFO L87 Difference]: Start difference. First operand 1190 states and 1563 transitions. Second operand has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 15 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:48:40,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:48:40,292 INFO L93 Difference]: Finished difference Result 1275 states and 1679 transitions. [2021-11-09 09:48:40,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-09 09:48:40,292 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 15 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-11-09 09:48:40,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:48:40,295 INFO L225 Difference]: With dead ends: 1275 [2021-11-09 09:48:40,295 INFO L226 Difference]: Without dead ends: 1180 [2021-11-09 09:48:40,296 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2021-11-09 09:48:40,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1180 states. [2021-11-09 09:48:40,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1180 to 854. [2021-11-09 09:48:40,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 854 states, 853 states have (on average 1.339976553341149) internal successors, (1143), 853 states have internal predecessors, (1143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:48:40,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 854 states to 854 states and 1143 transitions. [2021-11-09 09:48:40,499 INFO L78 Accepts]: Start accepts. Automaton has 854 states and 1143 transitions. Word has length 50 [2021-11-09 09:48:40,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:48:40,499 INFO L470 AbstractCegarLoop]: Abstraction has 854 states and 1143 transitions. [2021-11-09 09:48:40,499 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 15 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:48:40,500 INFO L276 IsEmpty]: Start isEmpty. Operand 854 states and 1143 transitions. [2021-11-09 09:48:40,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-09 09:48:40,501 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:48:40,502 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:48:40,527 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-11-09 09:48:40,706 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-11-09 09:48:40,706 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:48:40,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:48:40,706 INFO L85 PathProgramCache]: Analyzing trace with hash 660306497, now seen corresponding path program 10 times [2021-11-09 09:48:40,706 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:48:40,706 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59309152] [2021-11-09 09:48:40,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:48:40,707 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:48:40,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:48:41,298 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-09 09:48:41,298 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:48:41,298 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59309152] [2021-11-09 09:48:41,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59309152] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:48:41,299 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753242459] [2021-11-09 09:48:41,299 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 09:48:41,299 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:48:41,299 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:48:41,301 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:48:41,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-09 09:48:42,390 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 09:48:42,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:48:42,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 43 conjunts are in the unsatisfiable core [2021-11-09 09:48:42,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:48:43,852 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-09 09:48:43,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753242459] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:48:43,852 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:48:43,853 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 25 [2021-11-09 09:48:43,853 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772770982] [2021-11-09 09:48:43,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-09 09:48:43,853 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:48:43,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-09 09:48:43,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-11-09 09:48:43,854 INFO L87 Difference]: Start difference. First operand 854 states and 1143 transitions. Second operand has 25 states, 25 states have (on average 2.4) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:48:45,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:48:45,855 INFO L93 Difference]: Finished difference Result 1369 states and 1789 transitions. [2021-11-09 09:48:45,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-09 09:48:45,855 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.4) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-11-09 09:48:45,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:48:45,858 INFO L225 Difference]: With dead ends: 1369 [2021-11-09 09:48:45,859 INFO L226 Difference]: Without dead ends: 1364 [2021-11-09 09:48:45,859 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 49 SyntacticMatches, 7 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=115, Invalid=697, Unknown=0, NotChecked=0, Total=812 [2021-11-09 09:48:45,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1364 states. [2021-11-09 09:48:46,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1364 to 963. [2021-11-09 09:48:46,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 962 states have (on average 1.3503118503118503) internal successors, (1299), 962 states have internal predecessors, (1299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:48:46,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 1299 transitions. [2021-11-09 09:48:46,131 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 1299 transitions. Word has length 58 [2021-11-09 09:48:46,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:48:46,132 INFO L470 AbstractCegarLoop]: Abstraction has 963 states and 1299 transitions. [2021-11-09 09:48:46,132 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.4) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:48:46,132 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 1299 transitions. [2021-11-09 09:48:46,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-09 09:48:46,134 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:48:46,135 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:48:46,167 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-11-09 09:48:46,353 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-11-09 09:48:46,353 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:48:46,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:48:46,353 INFO L85 PathProgramCache]: Analyzing trace with hash -1859653437, now seen corresponding path program 5 times [2021-11-09 09:48:46,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:48:46,353 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324367897] [2021-11-09 09:48:46,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:48:46,354 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:48:46,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:48:47,076 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 7 proven. 54 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-09 09:48:47,077 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:48:47,077 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324367897] [2021-11-09 09:48:47,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324367897] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:48:47,077 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415590499] [2021-11-09 09:48:47,077 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 09:48:47,077 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:48:47,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:48:47,078 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:48:47,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-09 09:48:48,226 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-11-09 09:48:48,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:48:48,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 40 conjunts are in the unsatisfiable core [2021-11-09 09:48:48,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:48:48,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-11-09 09:48:48,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-09 09:48:48,900 INFO L354 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2021-11-09 09:48:48,901 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 32 treesize of output 21 [2021-11-09 09:48:48,941 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 19 proven. 19 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-09 09:48:48,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415590499] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:48:48,942 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:48:48,942 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16] total 33 [2021-11-09 09:48:48,942 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281920815] [2021-11-09 09:48:48,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-09 09:48:48,942 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:48:48,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-09 09:48:48,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=927, Unknown=0, NotChecked=0, Total=1056 [2021-11-09 09:48:48,943 INFO L87 Difference]: Start difference. First operand 963 states and 1299 transitions. Second operand has 33 states, 33 states have (on average 2.5454545454545454) internal successors, (84), 33 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:48:53,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:48:53,663 INFO L93 Difference]: Finished difference Result 2066 states and 2794 transitions. [2021-11-09 09:48:53,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2021-11-09 09:48:53,664 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.5454545454545454) internal successors, (84), 33 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-11-09 09:48:53,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:48:53,666 INFO L225 Difference]: With dead ends: 2066 [2021-11-09 09:48:53,667 INFO L226 Difference]: Without dead ends: 2001 [2021-11-09 09:48:53,668 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4135 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1373, Invalid=11737, Unknown=0, NotChecked=0, Total=13110 [2021-11-09 09:48:53,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2001 states. [2021-11-09 09:48:54,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2001 to 1248. [2021-11-09 09:48:54,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1248 states, 1247 states have (on average 1.3448275862068966) internal successors, (1677), 1247 states have internal predecessors, (1677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:48:54,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1248 states to 1248 states and 1677 transitions. [2021-11-09 09:48:54,020 INFO L78 Accepts]: Start accepts. Automaton has 1248 states and 1677 transitions. Word has length 58 [2021-11-09 09:48:54,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:48:54,021 INFO L470 AbstractCegarLoop]: Abstraction has 1248 states and 1677 transitions. [2021-11-09 09:48:54,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.5454545454545454) internal successors, (84), 33 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:48:54,021 INFO L276 IsEmpty]: Start isEmpty. Operand 1248 states and 1677 transitions. [2021-11-09 09:48:54,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-09 09:48:54,023 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:48:54,023 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:48:54,049 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-11-09 09:48:54,225 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-11-09 09:48:54,225 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:48:54,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:48:54,226 INFO L85 PathProgramCache]: Analyzing trace with hash 267279487, now seen corresponding path program 6 times [2021-11-09 09:48:54,226 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:48:54,226 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634350764] [2021-11-09 09:48:54,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:48:54,226 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:48:54,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:48:55,172 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 13 proven. 38 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-09 09:48:55,172 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:48:55,172 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634350764] [2021-11-09 09:48:55,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634350764] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:48:55,172 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306417565] [2021-11-09 09:48:55,173 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 09:48:55,173 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:48:55,173 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:48:55,177 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:48:55,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-11-09 09:48:56,667 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-11-09 09:48:56,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:48:56,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-09 09:48:56,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:48:57,155 INFO L354 Elim1Store]: treesize reduction 84, result has 27.6 percent of original size [2021-11-09 09:48:57,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 56 [2021-11-09 09:48:57,424 INFO L354 Elim1Store]: treesize reduction 196, result has 22.2 percent of original size [2021-11-09 09:48:57,425 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 9 case distinctions, treesize of input 76 treesize of output 93 [2021-11-09 09:48:57,895 INFO L354 Elim1Store]: treesize reduction 208, result has 20.3 percent of original size [2021-11-09 09:48:57,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 101 treesize of output 107 [2021-11-09 09:48:58,848 INFO L354 Elim1Store]: treesize reduction 206, result has 36.8 percent of original size [2021-11-09 09:48:58,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 148 treesize of output 207 [2021-11-09 09:49:13,861 INFO L354 Elim1Store]: treesize reduction 145, result has 24.1 percent of original size [2021-11-09 09:49:13,862 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 477 treesize of output 328 [2021-11-09 09:49:16,113 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 10 proven. 43 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-09 09:49:16,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306417565] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:49:16,114 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:49:16,114 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 22] total 38 [2021-11-09 09:49:16,114 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779836506] [2021-11-09 09:49:16,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-11-09 09:49:16,115 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:49:16,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-11-09 09:49:16,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1305, Unknown=0, NotChecked=0, Total=1406 [2021-11-09 09:49:16,116 INFO L87 Difference]: Start difference. First operand 1248 states and 1677 transitions. Second operand has 38 states, 38 states have (on average 2.3157894736842106) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:49:33,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:49:33,035 INFO L93 Difference]: Finished difference Result 2742 states and 3664 transitions. [2021-11-09 09:49:33,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2021-11-09 09:49:33,036 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.3157894736842106) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-11-09 09:49:33,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:49:33,040 INFO L225 Difference]: With dead ends: 2742 [2021-11-09 09:49:33,040 INFO L226 Difference]: Without dead ends: 2556 [2021-11-09 09:49:33,042 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 62 SyntacticMatches, 4 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5944 ImplicationChecksByTransitivity, 13.6s TimeCoverageRelationStatistics Valid=1679, Invalid=18913, Unknown=0, NotChecked=0, Total=20592 [2021-11-09 09:49:33,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2556 states. [2021-11-09 09:49:33,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2556 to 1697. [2021-11-09 09:49:33,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1697 states, 1696 states have (on average 1.3201650943396226) internal successors, (2239), 1696 states have internal predecessors, (2239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:49:33,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1697 states to 1697 states and 2239 transitions. [2021-11-09 09:49:33,523 INFO L78 Accepts]: Start accepts. Automaton has 1697 states and 2239 transitions. Word has length 58 [2021-11-09 09:49:33,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:49:33,524 INFO L470 AbstractCegarLoop]: Abstraction has 1697 states and 2239 transitions. [2021-11-09 09:49:33,524 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.3157894736842106) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:49:33,524 INFO L276 IsEmpty]: Start isEmpty. Operand 1697 states and 2239 transitions. [2021-11-09 09:49:33,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-09 09:49:33,527 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:49:33,528 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:49:33,571 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-11-09 09:49:33,741 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-11-09 09:49:33,741 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:49:33,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:49:33,741 INFO L85 PathProgramCache]: Analyzing trace with hash 73500483, now seen corresponding path program 7 times [2021-11-09 09:49:33,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:49:33,741 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339584044] [2021-11-09 09:49:33,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:49:33,741 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:49:33,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:49:34,974 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 15 proven. 53 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-09 09:49:34,974 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:49:34,974 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339584044] [2021-11-09 09:49:34,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339584044] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:49:34,975 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077608812] [2021-11-09 09:49:34,975 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 09:49:34,975 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:49:34,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:49:34,976 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:49:34,976 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-11-09 09:49:36,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:49:36,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 52 conjunts are in the unsatisfiable core [2021-11-09 09:49:36,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:49:36,826 INFO L354 Elim1Store]: treesize reduction 84, result has 20.8 percent of original size [2021-11-09 09:49:36,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 38 [2021-11-09 09:49:36,967 INFO L354 Elim1Store]: treesize reduction 210, result has 11.8 percent of original size [2021-11-09 09:49:36,968 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 9 case distinctions, treesize of input 56 treesize of output 47 [2021-11-09 09:49:37,097 INFO L354 Elim1Store]: treesize reduction 88, result has 17.8 percent of original size [2021-11-09 09:49:37,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 46 treesize of output 36 [2021-11-09 09:49:37,202 INFO L354 Elim1Store]: treesize reduction 126, result has 21.3 percent of original size [2021-11-09 09:49:37,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 57 [2021-11-09 09:49:37,314 INFO L354 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2021-11-09 09:49:37,314 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 23 treesize of output 12 [2021-11-09 09:49:37,370 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 25 proven. 41 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-09 09:49:37,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077608812] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:49:37,371 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:49:37,371 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 21] total 44 [2021-11-09 09:49:37,371 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510536577] [2021-11-09 09:49:37,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-11-09 09:49:37,371 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:49:37,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-11-09 09:49:37,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=1715, Unknown=0, NotChecked=0, Total=1892 [2021-11-09 09:49:37,372 INFO L87 Difference]: Start difference. First operand 1697 states and 2239 transitions. Second operand has 44 states, 44 states have (on average 2.2045454545454546) internal successors, (97), 44 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:49:44,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:49:44,471 INFO L93 Difference]: Finished difference Result 2906 states and 3837 transitions. [2021-11-09 09:49:44,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-11-09 09:49:44,471 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.2045454545454546) internal successors, (97), 44 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-11-09 09:49:44,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:49:44,475 INFO L225 Difference]: With dead ends: 2906 [2021-11-09 09:49:44,475 INFO L226 Difference]: Without dead ends: 2727 [2021-11-09 09:49:44,477 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2708 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=1571, Invalid=9349, Unknown=0, NotChecked=0, Total=10920 [2021-11-09 09:49:44,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2727 states. [2021-11-09 09:49:45,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2727 to 2064. [2021-11-09 09:49:45,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2064 states, 2063 states have (on average 1.3102278235579254) internal successors, (2703), 2063 states have internal predecessors, (2703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:49:45,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2064 states to 2064 states and 2703 transitions. [2021-11-09 09:49:45,315 INFO L78 Accepts]: Start accepts. Automaton has 2064 states and 2703 transitions. Word has length 58 [2021-11-09 09:49:45,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:49:45,315 INFO L470 AbstractCegarLoop]: Abstraction has 2064 states and 2703 transitions. [2021-11-09 09:49:45,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.2045454545454546) internal successors, (97), 44 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:49:45,315 INFO L276 IsEmpty]: Start isEmpty. Operand 2064 states and 2703 transitions. [2021-11-09 09:49:45,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-09 09:49:45,318 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:49:45,318 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:49:45,343 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-11-09 09:49:45,518 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:49:45,519 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:49:45,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:49:45,519 INFO L85 PathProgramCache]: Analyzing trace with hash -360761857, now seen corresponding path program 8 times [2021-11-09 09:49:45,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:49:45,519 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14078938] [2021-11-09 09:49:45,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:49:45,519 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:49:45,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:49:46,918 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 7 proven. 53 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-09 09:49:46,919 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:49:46,919 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14078938] [2021-11-09 09:49:46,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14078938] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:49:46,919 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950753939] [2021-11-09 09:49:46,919 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:49:46,919 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:49:46,919 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:49:46,920 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:49:46,921 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-11-09 09:49:48,280 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:49:48,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:49:48,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-09 09:49:48,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:49:48,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:49:48,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 33 [2021-11-09 09:49:48,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:49:48,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:49:48,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:49:48,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:49:48,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:49:48,958 INFO L354 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2021-11-09 09:49:48,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 55 treesize of output 58 [2021-11-09 09:49:49,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:49:49,198 INFO L354 Elim1Store]: treesize reduction 292, result has 17.5 percent of original size [2021-11-09 09:49:49,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 89 treesize of output 102 [2021-11-09 09:49:57,056 INFO L354 Elim1Store]: treesize reduction 298, result has 26.8 percent of original size [2021-11-09 09:49:57,057 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 105 treesize of output 165 [2021-11-09 09:49:57,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-09 09:49:57,290 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 19 proven. 34 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-09 09:49:57,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950753939] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:49:57,291 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:49:57,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 19] total 44 [2021-11-09 09:49:57,291 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733908251] [2021-11-09 09:49:57,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-11-09 09:49:57,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:49:57,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-11-09 09:49:57,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=1661, Unknown=4, NotChecked=0, Total=1892 [2021-11-09 09:49:57,293 INFO L87 Difference]: Start difference. First operand 2064 states and 2703 transitions. Second operand has 44 states, 44 states have (on average 1.9545454545454546) internal successors, (86), 44 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:53:53,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:53:53,803 INFO L93 Difference]: Finished difference Result 4068 states and 5301 transitions. [2021-11-09 09:53:53,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2021-11-09 09:53:53,804 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.9545454545454546) internal successors, (86), 44 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-11-09 09:53:53,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:53:53,809 INFO L225 Difference]: With dead ends: 4068 [2021-11-09 09:53:53,809 INFO L226 Difference]: Without dead ends: 3937 [2021-11-09 09:53:53,811 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8090 ImplicationChecksByTransitivity, 196.1s TimeCoverageRelationStatistics Valid=2753, Invalid=22273, Unknown=96, NotChecked=0, Total=25122 [2021-11-09 09:53:53,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3937 states. [2021-11-09 09:53:54,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3937 to 2469. [2021-11-09 09:53:54,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2469 states, 2468 states have (on average 1.2974068071312803) internal successors, (3202), 2468 states have internal predecessors, (3202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:53:54,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2469 states to 2469 states and 3202 transitions. [2021-11-09 09:53:54,914 INFO L78 Accepts]: Start accepts. Automaton has 2469 states and 3202 transitions. Word has length 58 [2021-11-09 09:53:54,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:53:54,915 INFO L470 AbstractCegarLoop]: Abstraction has 2469 states and 3202 transitions. [2021-11-09 09:53:54,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.9545454545454546) internal successors, (86), 44 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:53:54,915 INFO L276 IsEmpty]: Start isEmpty. Operand 2469 states and 3202 transitions. [2021-11-09 09:53:54,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-09 09:53:54,920 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:53:54,920 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:53:54,965 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-11-09 09:53:55,133 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-11-09 09:53:55,133 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:53:55,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:53:55,133 INFO L85 PathProgramCache]: Analyzing trace with hash 587919939, now seen corresponding path program 3 times [2021-11-09 09:53:55,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:53:55,133 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529117312] [2021-11-09 09:53:55,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:53:55,134 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:53:55,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:53:55,843 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 2 proven. 42 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-09 09:53:55,843 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:53:55,843 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529117312] [2021-11-09 09:53:55,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529117312] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:53:55,844 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32019777] [2021-11-09 09:53:55,844 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 09:53:55,844 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:53:55,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:53:55,849 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:53:55,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-11-09 09:53:57,444 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-09 09:53:57,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:53:57,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 50 conjunts are in the unsatisfiable core [2021-11-09 09:53:57,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:53:57,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:53:57,802 INFO L354 Elim1Store]: treesize reduction 69, result has 33.0 percent of original size [2021-11-09 09:53:57,802 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 45 treesize of output 63 [2021-11-09 09:53:58,998 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 09:53:58,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 82 [2021-11-09 09:54:00,249 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 9 proven. 34 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-09 09:54:00,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32019777] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:54:00,249 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:54:00,249 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19] total 34 [2021-11-09 09:54:00,250 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633326827] [2021-11-09 09:54:00,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-09 09:54:00,250 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:54:00,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-09 09:54:00,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1000, Unknown=0, NotChecked=0, Total=1122 [2021-11-09 09:54:00,251 INFO L87 Difference]: Start difference. First operand 2469 states and 3202 transitions. Second operand has 34 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 34 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:55:24,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:55:24,814 INFO L93 Difference]: Finished difference Result 5476 states and 7213 transitions. [2021-11-09 09:55:24,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2021-11-09 09:55:24,815 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 34 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-11-09 09:55:24,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:55:24,823 INFO L225 Difference]: With dead ends: 5476 [2021-11-09 09:55:24,823 INFO L226 Difference]: Without dead ends: 4665 [2021-11-09 09:55:24,827 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7344 ImplicationChecksByTransitivity, 63.0s TimeCoverageRelationStatistics Valid=2795, Invalid=18940, Unknown=21, NotChecked=0, Total=21756 [2021-11-09 09:55:24,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4665 states. [2021-11-09 09:55:26,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4665 to 3330. [2021-11-09 09:55:26,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3330 states, 3329 states have (on average 1.3085010513667767) internal successors, (4356), 3329 states have internal predecessors, (4356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:55:26,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3330 states to 3330 states and 4356 transitions. [2021-11-09 09:55:26,206 INFO L78 Accepts]: Start accepts. Automaton has 3330 states and 4356 transitions. Word has length 58 [2021-11-09 09:55:26,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:55:26,206 INFO L470 AbstractCegarLoop]: Abstraction has 3330 states and 4356 transitions. [2021-11-09 09:55:26,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 34 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:55:26,207 INFO L276 IsEmpty]: Start isEmpty. Operand 3330 states and 4356 transitions. [2021-11-09 09:55:26,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-09 09:55:26,210 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:55:26,211 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:55:26,234 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-11-09 09:55:26,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-11-09 09:55:26,411 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:55:26,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:55:26,411 INFO L85 PathProgramCache]: Analyzing trace with hash -1185060669, now seen corresponding path program 4 times [2021-11-09 09:55:26,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:55:26,412 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111471601] [2021-11-09 09:55:26,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:55:26,412 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:55:26,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:55:27,114 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 7 proven. 54 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-09 09:55:27,114 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:55:27,115 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111471601] [2021-11-09 09:55:27,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111471601] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:55:27,115 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035491373] [2021-11-09 09:55:27,115 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 09:55:27,115 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:55:27,115 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:55:27,116 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:55:27,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-11-09 09:55:28,583 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 09:55:28,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:55:28,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 61 conjunts are in the unsatisfiable core [2021-11-09 09:55:28,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:55:37,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-11-09 09:55:37,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-09 09:55:37,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-11-09 09:55:37,823 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 7 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 09:55:37,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035491373] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:55:37,824 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:55:37,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 25] total 38 [2021-11-09 09:55:37,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401071433] [2021-11-09 09:55:37,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-11-09 09:55:37,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:55:37,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-11-09 09:55:37,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1231, Unknown=4, NotChecked=0, Total=1406 [2021-11-09 09:55:37,825 INFO L87 Difference]: Start difference. First operand 3330 states and 4356 transitions. Second operand has 38 states, 38 states have (on average 2.4210526315789473) internal successors, (92), 38 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:55:42,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:55:42,428 INFO L93 Difference]: Finished difference Result 4044 states and 5217 transitions. [2021-11-09 09:55:42,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-11-09 09:55:42,429 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.4210526315789473) internal successors, (92), 38 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-11-09 09:55:42,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:55:42,436 INFO L225 Difference]: With dead ends: 4044 [2021-11-09 09:55:42,436 INFO L226 Difference]: Without dead ends: 4027 [2021-11-09 09:55:42,438 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1304 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=757, Invalid=4351, Unknown=4, NotChecked=0, Total=5112 [2021-11-09 09:55:42,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4027 states. [2021-11-09 09:55:44,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4027 to 3603. [2021-11-09 09:55:44,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3603 states, 3602 states have (on average 1.3037201554691837) internal successors, (4696), 3602 states have internal predecessors, (4696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:55:44,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3603 states to 3603 states and 4696 transitions. [2021-11-09 09:55:44,039 INFO L78 Accepts]: Start accepts. Automaton has 3603 states and 4696 transitions. Word has length 58 [2021-11-09 09:55:44,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:55:44,039 INFO L470 AbstractCegarLoop]: Abstraction has 3603 states and 4696 transitions. [2021-11-09 09:55:44,039 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.4210526315789473) internal successors, (92), 38 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:55:44,039 INFO L276 IsEmpty]: Start isEmpty. Operand 3603 states and 4696 transitions. [2021-11-09 09:55:44,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-09 09:55:44,044 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:55:44,044 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:55:44,068 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-11-09 09:55:44,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:55:44,245 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:55:44,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:55:44,245 INFO L85 PathProgramCache]: Analyzing trace with hash 589946693, now seen corresponding path program 2 times [2021-11-09 09:55:44,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:55:44,245 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164112908] [2021-11-09 09:55:44,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:55:44,245 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:55:44,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:55:45,039 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 7 proven. 46 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-09 09:55:45,040 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:55:45,040 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164112908] [2021-11-09 09:55:45,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164112908] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:55:45,040 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821995016] [2021-11-09 09:55:45,040 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:55:45,040 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:55:45,041 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:55:45,041 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:55:45,042 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-11-09 09:55:46,614 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:55:46,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:55:46,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 42 conjunts are in the unsatisfiable core [2021-11-09 09:55:46,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:55:46,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 20 [2021-11-09 09:55:47,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-11-09 09:55:47,144 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 7 proven. 22 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-09 09:55:47,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821995016] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:55:47,145 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:55:47,145 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 11] total 29 [2021-11-09 09:55:47,145 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365160592] [2021-11-09 09:55:47,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-09 09:55:47,145 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:55:47,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-09 09:55:47,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=735, Unknown=0, NotChecked=0, Total=812 [2021-11-09 09:55:47,146 INFO L87 Difference]: Start difference. First operand 3603 states and 4696 transitions. Second operand has 29 states, 29 states have (on average 2.793103448275862) internal successors, (81), 29 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:55:52,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:55:52,858 INFO L93 Difference]: Finished difference Result 4651 states and 5980 transitions. [2021-11-09 09:55:52,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-11-09 09:55:52,858 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.793103448275862) internal successors, (81), 29 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-11-09 09:55:52,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:55:52,864 INFO L225 Difference]: With dead ends: 4651 [2021-11-09 09:55:52,864 INFO L226 Difference]: Without dead ends: 3805 [2021-11-09 09:55:52,867 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1958 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=676, Invalid=6634, Unknown=0, NotChecked=0, Total=7310 [2021-11-09 09:55:52,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3805 states. [2021-11-09 09:55:54,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3805 to 3524. [2021-11-09 09:55:54,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3524 states, 3523 states have (on average 1.2912290661368153) internal successors, (4549), 3523 states have internal predecessors, (4549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:55:54,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3524 states to 3524 states and 4549 transitions. [2021-11-09 09:55:54,382 INFO L78 Accepts]: Start accepts. Automaton has 3524 states and 4549 transitions. Word has length 58 [2021-11-09 09:55:54,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:55:54,382 INFO L470 AbstractCegarLoop]: Abstraction has 3524 states and 4549 transitions. [2021-11-09 09:55:54,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.793103448275862) internal successors, (81), 29 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:55:54,382 INFO L276 IsEmpty]: Start isEmpty. Operand 3524 states and 4549 transitions. [2021-11-09 09:55:54,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-09 09:55:54,389 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:55:54,389 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:55:54,422 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-11-09 09:55:54,609 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:55:54,609 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:55:54,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:55:54,609 INFO L85 PathProgramCache]: Analyzing trace with hash 1553792835, now seen corresponding path program 3 times [2021-11-09 09:55:54,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:55:54,609 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310170621] [2021-11-09 09:55:54,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:55:54,610 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:55:54,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:55:55,197 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 5 proven. 39 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-09 09:55:55,197 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:55:55,197 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310170621] [2021-11-09 09:55:55,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310170621] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:55:55,197 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753217835] [2021-11-09 09:55:55,197 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 09:55:55,197 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:55:55,197 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:55:55,198 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:55:55,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-11-09 09:55:56,870 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-09 09:55:56,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:55:56,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-09 09:55:56,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:55:57,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:55:57,244 INFO L354 Elim1Store]: treesize reduction 66, result has 29.8 percent of original size [2021-11-09 09:55:57,244 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 45 treesize of output 58 [2021-11-09 09:55:58,171 INFO L354 Elim1Store]: treesize reduction 18, result has 56.1 percent of original size [2021-11-09 09:55:58,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 64 treesize of output 58 [2021-11-09 09:55:58,644 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-11-09 09:55:58,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753217835] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:55:58,644 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:55:58,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 26 [2021-11-09 09:55:58,645 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770012557] [2021-11-09 09:55:58,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-09 09:55:58,645 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:55:58,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-09 09:55:58,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2021-11-09 09:55:58,646 INFO L87 Difference]: Start difference. First operand 3524 states and 4549 transitions. Second operand has 26 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 26 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:56:20,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:56:20,764 INFO L93 Difference]: Finished difference Result 5425 states and 6898 transitions. [2021-11-09 09:56:20,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2021-11-09 09:56:20,765 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 26 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-11-09 09:56:20,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:56:20,768 INFO L225 Difference]: With dead ends: 5425 [2021-11-09 09:56:20,768 INFO L226 Difference]: Without dead ends: 4937 [2021-11-09 09:56:20,770 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3933 ImplicationChecksByTransitivity, 13.9s TimeCoverageRelationStatistics Valid=2113, Invalid=10995, Unknown=2, NotChecked=0, Total=13110 [2021-11-09 09:56:20,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4937 states. [2021-11-09 09:56:22,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4937 to 3775. [2021-11-09 09:56:22,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3775 states, 3774 states have (on average 1.2771595124536301) internal successors, (4820), 3774 states have internal predecessors, (4820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:56:22,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3775 states to 3775 states and 4820 transitions. [2021-11-09 09:56:22,341 INFO L78 Accepts]: Start accepts. Automaton has 3775 states and 4820 transitions. Word has length 58 [2021-11-09 09:56:22,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:56:22,342 INFO L470 AbstractCegarLoop]: Abstraction has 3775 states and 4820 transitions. [2021-11-09 09:56:22,342 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 26 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:56:22,342 INFO L276 IsEmpty]: Start isEmpty. Operand 3775 states and 4820 transitions. [2021-11-09 09:56:22,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-09 09:56:22,349 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:56:22,349 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:56:22,383 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-11-09 09:56:22,565 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-11-09 09:56:22,565 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:56:22,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:56:22,565 INFO L85 PathProgramCache]: Analyzing trace with hash 1576425089, now seen corresponding path program 3 times [2021-11-09 09:56:22,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:56:22,565 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207854572] [2021-11-09 09:56:22,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:56:22,566 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:56:22,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:56:24,264 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 13 proven. 60 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-09 09:56:24,265 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:56:24,265 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207854572] [2021-11-09 09:56:24,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207854572] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:56:24,265 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797457807] [2021-11-09 09:56:24,265 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 09:56:24,265 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:56:24,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:56:24,266 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:56:24,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff7162a-8185-44cf-893a-c9cf7e7cb7c6/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-11-09 09:56:25,971 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-09 09:56:25,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:56:25,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 40 conjunts are in the unsatisfiable core [2021-11-09 09:56:25,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:56:26,422 INFO L354 Elim1Store]: treesize reduction 84, result has 27.6 percent of original size [2021-11-09 09:56:26,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 57 [2021-11-09 09:56:37,117 INFO L354 Elim1Store]: treesize reduction 220, result has 26.4 percent of original size [2021-11-09 09:56:37,117 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 95 treesize of output 127 [2021-11-09 09:56:56,378 INFO L354 Elim1Store]: treesize reduction 470, result has 14.5 percent of original size [2021-11-09 09:56:56,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 210 treesize of output 194 [2021-11-09 09:57:09,348 INFO L354 Elim1Store]: treesize reduction 187, result has 7.4 percent of original size [2021-11-09 09:57:09,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 84 treesize of output 61 [2021-11-09 09:57:09,574 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 09:57:09,575 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 51 treesize of output 43 [2021-11-09 09:57:10,061 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 3 proven. 31 refuted. 2 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-09 09:57:10,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797457807] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:57:10,061 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:57:10,061 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 20] total 42 [2021-11-09 09:57:10,061 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251731542] [2021-11-09 09:57:10,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-11-09 09:57:10,062 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:57:10,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-11-09 09:57:10,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1560, Unknown=17, NotChecked=0, Total=1722 [2021-11-09 09:57:10,062 INFO L87 Difference]: Start difference. First operand 3775 states and 4820 transitions. Second operand has 42 states, 42 states have (on average 2.1904761904761907) internal successors, (92), 42 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)