./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-crafted/zero_sum_m3.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-crafted/zero_sum_m3.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/bin/uautomizer-DrprNOufMa --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1743decb4413dd023f2c21969cafbefd9f03a99467b1795f9affedc42875deb2 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-07 00:42:46,996 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-07 00:42:46,998 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-07 00:42:47,030 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-07 00:42:47,031 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-07 00:42:47,032 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-07 00:42:47,034 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-07 00:42:47,036 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-07 00:42:47,038 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-07 00:42:47,039 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-07 00:42:47,040 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-07 00:42:47,042 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-07 00:42:47,042 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-07 00:42:47,044 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-07 00:42:47,045 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-07 00:42:47,047 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-07 00:42:47,048 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-07 00:42:47,049 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-07 00:42:47,051 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-07 00:42:47,054 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-07 00:42:47,056 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-07 00:42:47,057 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-07 00:42:47,058 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-07 00:42:47,059 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-07 00:42:47,062 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-07 00:42:47,062 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-07 00:42:47,062 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-07 00:42:47,063 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-07 00:42:47,063 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-07 00:42:47,064 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-07 00:42:47,065 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-07 00:42:47,065 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-07 00:42:47,066 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-07 00:42:47,067 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-07 00:42:47,068 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-07 00:42:47,068 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-07 00:42:47,068 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-07 00:42:47,068 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-07 00:42:47,069 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-07 00:42:47,069 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-07 00:42:47,070 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-07 00:42:47,070 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-07 00:42:47,089 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-07 00:42:47,089 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-07 00:42:47,089 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-07 00:42:47,089 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-07 00:42:47,090 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-07 00:42:47,090 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-07 00:42:47,090 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-07 00:42:47,090 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-07 00:42:47,091 INFO L138 SettingsManager]: * Use SBE=true [2021-12-07 00:42:47,091 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-07 00:42:47,091 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-07 00:42:47,091 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-07 00:42:47,091 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-07 00:42:47,091 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-07 00:42:47,091 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-07 00:42:47,091 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-07 00:42:47,092 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-07 00:42:47,092 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-07 00:42:47,092 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-07 00:42:47,092 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-07 00:42:47,092 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-07 00:42:47,092 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-07 00:42:47,092 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-07 00:42:47,092 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-07 00:42:47,093 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-07 00:42:47,093 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-07 00:42:47,093 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-07 00:42:47,093 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-07 00:42:47,093 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-07 00:42:47,093 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-07 00:42:47,093 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-07 00:42:47,093 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-07 00:42:47,094 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-07 00:42:47,094 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-07 00:42:47,094 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_b52fd21e-d567-47c7-9329-ebd865bd0672/bin/uautomizer-DrprNOufMa/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1743decb4413dd023f2c21969cafbefd9f03a99467b1795f9affedc42875deb2 [2021-12-07 00:42:47,267 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-07 00:42:47,283 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-07 00:42:47,285 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-07 00:42:47,286 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-07 00:42:47,286 INFO L275 PluginConnector]: CDTParser initialized [2021-12-07 00:42:47,287 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/array-crafted/zero_sum_m3.c [2021-12-07 00:42:47,328 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/bin/uautomizer-DrprNOufMa/data/f41e8ca30/fbefd42fb2f747dc8771220119ce0d83/FLAG8e914a1c2 [2021-12-07 00:42:47,708 INFO L306 CDTParser]: Found 1 translation units. [2021-12-07 00:42:47,708 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/sv-benchmarks/c/array-crafted/zero_sum_m3.c [2021-12-07 00:42:47,714 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/bin/uautomizer-DrprNOufMa/data/f41e8ca30/fbefd42fb2f747dc8771220119ce0d83/FLAG8e914a1c2 [2021-12-07 00:42:47,726 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/bin/uautomizer-DrprNOufMa/data/f41e8ca30/fbefd42fb2f747dc8771220119ce0d83 [2021-12-07 00:42:47,728 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-07 00:42:47,729 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-07 00:42:47,731 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-07 00:42:47,731 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-07 00:42:47,734 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-07 00:42:47,735 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 12:42:47" (1/1) ... [2021-12-07 00:42:47,736 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5eef15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:42:47, skipping insertion in model container [2021-12-07 00:42:47,736 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 12:42:47" (1/1) ... [2021-12-07 00:42:47,742 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-07 00:42:47,755 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-07 00:42:47,878 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/sv-benchmarks/c/array-crafted/zero_sum_m3.c[402,415] [2021-12-07 00:42:47,893 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-07 00:42:47,900 INFO L203 MainTranslator]: Completed pre-run [2021-12-07 00:42:47,909 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/sv-benchmarks/c/array-crafted/zero_sum_m3.c[402,415] [2021-12-07 00:42:47,917 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-07 00:42:47,927 INFO L208 MainTranslator]: Completed translation [2021-12-07 00:42:47,928 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:42:47 WrapperNode [2021-12-07 00:42:47,928 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-07 00:42:47,929 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-07 00:42:47,929 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-07 00:42:47,929 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-07 00:42:47,935 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:42:47" (1/1) ... [2021-12-07 00:42:47,942 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:42:47" (1/1) ... [2021-12-07 00:42:47,963 INFO L137 Inliner]: procedures = 15, calls = 17, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 105 [2021-12-07 00:42:47,963 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-07 00:42:47,964 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-07 00:42:47,964 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-07 00:42:47,964 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-07 00:42:47,973 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:42:47" (1/1) ... [2021-12-07 00:42:47,973 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:42:47" (1/1) ... [2021-12-07 00:42:47,975 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:42:47" (1/1) ... [2021-12-07 00:42:47,975 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:42:47" (1/1) ... [2021-12-07 00:42:47,980 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:42:47" (1/1) ... [2021-12-07 00:42:47,985 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:42:47" (1/1) ... [2021-12-07 00:42:47,987 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:42:47" (1/1) ... [2021-12-07 00:42:47,989 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-07 00:42:47,990 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-07 00:42:47,990 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-07 00:42:47,990 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-07 00:42:47,991 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:42:47" (1/1) ... [2021-12-07 00:42:47,997 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-07 00:42:48,006 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:42:48,016 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-07 00:42:48,017 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-07 00:42:48,044 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-07 00:42:48,044 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-07 00:42:48,045 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-07 00:42:48,045 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-07 00:42:48,045 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-07 00:42:48,045 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-07 00:42:48,045 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-07 00:42:48,045 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-07 00:42:48,093 INFO L236 CfgBuilder]: Building ICFG [2021-12-07 00:42:48,094 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-07 00:42:48,190 INFO L277 CfgBuilder]: Performing block encoding [2021-12-07 00:42:48,194 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-07 00:42:48,195 INFO L301 CfgBuilder]: Removed 7 assume(true) statements. [2021-12-07 00:42:48,196 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 12:42:48 BoogieIcfgContainer [2021-12-07 00:42:48,196 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-07 00:42:48,197 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-07 00:42:48,197 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-07 00:42:48,199 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-07 00:42:48,200 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 12:42:47" (1/3) ... [2021-12-07 00:42:48,200 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ec41fb3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 12:42:48, skipping insertion in model container [2021-12-07 00:42:48,200 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:42:47" (2/3) ... [2021-12-07 00:42:48,201 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ec41fb3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 12:42:48, skipping insertion in model container [2021-12-07 00:42:48,201 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 12:42:48" (3/3) ... [2021-12-07 00:42:48,202 INFO L111 eAbstractionObserver]: Analyzing ICFG zero_sum_m3.c [2021-12-07 00:42:48,205 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-07 00:42:48,205 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-07 00:42:48,239 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-07 00:42:48,244 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-07 00:42:48,245 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-07 00:42:48,255 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 30 states have (on average 1.5666666666666667) internal successors, (47), 31 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) [2021-12-07 00:42:48,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-07 00:42:48,260 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:42:48,260 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:42:48,261 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:42:48,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:42:48,265 INFO L85 PathProgramCache]: Analyzing trace with hash 534528496, now seen corresponding path program 1 times [2021-12-07 00:42:48,271 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:42:48,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386524128] [2021-12-07 00:42:48,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:42:48,273 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:42:48,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:42:48,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:42:48,385 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:42:48,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386524128] [2021-12-07 00:42:48,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386524128] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:42:48,386 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:42:48,387 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-07 00:42:48,388 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637319028] [2021-12-07 00:42:48,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:42:48,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-07 00:42:48,394 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:42:48,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-07 00:42:48,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-07 00:42:48,422 INFO L87 Difference]: Start difference. First operand has 32 states, 30 states have (on average 1.5666666666666667) internal successors, (47), 31 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) Second operand has 2 states, 2 states have (on average 9.5) internal successors, (19), 2 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) [2021-12-07 00:42:48,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:42:48,437 INFO L93 Difference]: Finished difference Result 59 states and 86 transitions. [2021-12-07 00:42:48,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-07 00:42:48,440 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 9.5) internal successors, (19), 2 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 [2021-12-07 00:42:48,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:42:48,446 INFO L225 Difference]: With dead ends: 59 [2021-12-07 00:42:48,446 INFO L226 Difference]: Without dead ends: 27 [2021-12-07 00:42:48,448 INFO L932 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 [2021-12-07 00:42:48,452 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:42:48,454 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:42:48,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-12-07 00:42:48,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-12-07 00:42:48,480 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) [2021-12-07 00:42:48,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2021-12-07 00:42:48,482 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 19 [2021-12-07 00:42:48,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:42:48,483 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2021-12-07 00:42:48,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 9.5) internal successors, (19), 2 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) [2021-12-07 00:42:48,483 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2021-12-07 00:42:48,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-07 00:42:48,490 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:42:48,490 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:42:48,490 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-07 00:42:48,491 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:42:48,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:42:48,491 INFO L85 PathProgramCache]: Analyzing trace with hash -697412484, now seen corresponding path program 1 times [2021-12-07 00:42:48,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:42:48,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044785492] [2021-12-07 00:42:48,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:42:48,492 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:42:48,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:42:48,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:42:48,550 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:42:48,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044785492] [2021-12-07 00:42:48,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044785492] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:42:48,551 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:42:48,551 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 00:42:48,551 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964154348] [2021-12-07 00:42:48,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:42:48,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 00:42:48,552 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:42:48,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 00:42:48,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:42:48,553 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 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) [2021-12-07 00:42:48,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:42:48,584 INFO L93 Difference]: Finished difference Result 51 states and 63 transitions. [2021-12-07 00:42:48,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 00:42:48,584 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 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 [2021-12-07 00:42:48,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:42:48,585 INFO L225 Difference]: With dead ends: 51 [2021-12-07 00:42:48,585 INFO L226 Difference]: Without dead ends: 29 [2021-12-07 00:42:48,585 INFO L932 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 [2021-12-07 00:42:48,587 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 1 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:42:48,587 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 46 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:42:48,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-12-07 00:42:48,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2021-12-07 00:42:48,591 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) [2021-12-07 00:42:48,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2021-12-07 00:42:48,592 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 19 [2021-12-07 00:42:48,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:42:48,592 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2021-12-07 00:42:48,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 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) [2021-12-07 00:42:48,593 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2021-12-07 00:42:48,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-07 00:42:48,593 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:42:48,593 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:42:48,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-07 00:42:48,594 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:42:48,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:42:48,594 INFO L85 PathProgramCache]: Analyzing trace with hash -506383970, now seen corresponding path program 1 times [2021-12-07 00:42:48,595 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:42:48,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278569815] [2021-12-07 00:42:48,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:42:48,595 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:42:48,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:42:48,644 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-07 00:42:48,644 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:42:48,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278569815] [2021-12-07 00:42:48,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278569815] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:42:48,645 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:42:48,645 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-07 00:42:48,645 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028603920] [2021-12-07 00:42:48,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:42:48,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-07 00:42:48,646 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:42:48,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-07 00:42:48,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-07 00:42:48,647 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:42:48,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:42:48,714 INFO L93 Difference]: Finished difference Result 59 states and 75 transitions. [2021-12-07 00:42:48,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-07 00:42:48,715 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 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 21 [2021-12-07 00:42:48,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:42:48,716 INFO L225 Difference]: With dead ends: 59 [2021-12-07 00:42:48,716 INFO L226 Difference]: Without dead ends: 40 [2021-12-07 00:42:48,717 INFO L932 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 [2021-12-07 00:42:48,718 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 39 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 00:42:48,719 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 17 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 00:42:48,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-12-07 00:42:48,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 34. [2021-12-07 00:42:48,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 33 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:42:48,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2021-12-07 00:42:48,726 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 21 [2021-12-07 00:42:48,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:42:48,727 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2021-12-07 00:42:48,727 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:42:48,727 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2021-12-07 00:42:48,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-07 00:42:48,728 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:42:48,728 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:42:48,729 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-07 00:42:48,729 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:42:48,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:42:48,730 INFO L85 PathProgramCache]: Analyzing trace with hash 615846698, now seen corresponding path program 1 times [2021-12-07 00:42:48,730 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:42:48,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83733315] [2021-12-07 00:42:48,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:42:48,731 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:42:48,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:42:48,800 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-07 00:42:48,800 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:42:48,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83733315] [2021-12-07 00:42:48,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83733315] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:42:48,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682215789] [2021-12-07 00:42:48,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:42:48,801 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:42:48,801 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:42:48,802 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:42:48,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-07 00:42:48,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:42:48,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-07 00:42:48,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:42:48,938 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-07 00:42:48,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:42:48,997 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-07 00:42:48,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682215789] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:42:48,997 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:42:48,997 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-12-07 00:42:48,998 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393083770] [2021-12-07 00:42:48,998 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:42:48,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-07 00:42:48,999 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:42:48,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-07 00:42:49,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-12-07 00:42:49,000 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:42:49,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:42:49,032 INFO L93 Difference]: Finished difference Result 65 states and 77 transitions. [2021-12-07 00:42:49,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-07 00:42:49,033 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 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 33 [2021-12-07 00:42:49,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:42:49,033 INFO L225 Difference]: With dead ends: 65 [2021-12-07 00:42:49,033 INFO L226 Difference]: Without dead ends: 37 [2021-12-07 00:42:49,034 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-12-07 00:42:49,034 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 4 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:42:49,035 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 61 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:42:49,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-12-07 00:42:49,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2021-12-07 00:42:49,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.2) internal successors, (42), 35 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:42:49,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2021-12-07 00:42:49,039 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 33 [2021-12-07 00:42:49,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:42:49,039 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2021-12-07 00:42:49,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:42:49,040 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2021-12-07 00:42:49,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-07 00:42:49,040 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:42:49,041 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:42:49,061 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-07 00:42:49,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:42:49,243 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:42:49,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:42:49,245 INFO L85 PathProgramCache]: Analyzing trace with hash -160084788, now seen corresponding path program 2 times [2021-12-07 00:42:49,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:42:49,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870526410] [2021-12-07 00:42:49,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:42:49,247 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:42:49,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:42:49,401 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-07 00:42:49,401 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:42:49,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870526410] [2021-12-07 00:42:49,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870526410] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:42:49,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643810934] [2021-12-07 00:42:49,402 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 00:42:49,402 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:42:49,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:42:49,403 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:42:49,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-07 00:42:49,459 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-07 00:42:49,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:42:49,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-07 00:42:49,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:42:49,537 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-07 00:42:49,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:42:49,593 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-07 00:42:49,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643810934] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:42:49,593 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:42:49,593 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2021-12-07 00:42:49,594 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556006415] [2021-12-07 00:42:49,594 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:42:49,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-07 00:42:49,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:42:49,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-07 00:42:49,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-12-07 00:42:49,595 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:42:49,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:42:49,669 INFO L93 Difference]: Finished difference Result 78 states and 94 transitions. [2021-12-07 00:42:49,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-07 00:42:49,669 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 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 35 [2021-12-07 00:42:49,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:42:49,670 INFO L225 Difference]: With dead ends: 78 [2021-12-07 00:42:49,670 INFO L226 Difference]: Without dead ends: 54 [2021-12-07 00:42:49,670 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 65 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=40, Unknown=0, NotChecked=0, Total=72 [2021-12-07 00:42:49,671 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 55 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 00:42:49,671 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 25 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 00:42:49,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-12-07 00:42:49,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 48. [2021-12-07 00:42:49,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.148936170212766) internal successors, (54), 47 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:42:49,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 54 transitions. [2021-12-07 00:42:49,676 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 54 transitions. Word has length 35 [2021-12-07 00:42:49,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:42:49,676 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 54 transitions. [2021-12-07 00:42:49,677 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:42:49,677 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 54 transitions. [2021-12-07 00:42:49,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-07 00:42:49,678 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:42:49,678 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:42:49,698 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-07 00:42:49,878 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:42:49,880 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:42:49,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:42:49,882 INFO L85 PathProgramCache]: Analyzing trace with hash -1337652904, now seen corresponding path program 3 times [2021-12-07 00:42:49,882 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:42:49,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8563672] [2021-12-07 00:42:49,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:42:49,883 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:42:50,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:42:51,318 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:42:51,318 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:42:51,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8563672] [2021-12-07 00:42:51,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8563672] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:42:51,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004156723] [2021-12-07 00:42:51,318 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-07 00:42:51,319 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:42:51,319 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:42:51,319 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:42:51,320 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-07 00:42:51,358 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-07 00:42:51,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:42:51,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 65 conjunts are in the unsatisfiable core [2021-12-07 00:42:51,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:42:54,479 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 00:42:54,480 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 17 treesize of output 18 [2021-12-07 00:42:54,742 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:42:54,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:43:04,096 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 00:43:04,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 74 treesize of output 103 [2021-12-07 00:43:05,112 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:43:05,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004156723] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:43:05,112 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:43:05,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 37, 37] total 96 [2021-12-07 00:43:05,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268802609] [2021-12-07 00:43:05,113 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:43:05,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2021-12-07 00:43:05,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:43:05,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2021-12-07 00:43:05,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=567, Invalid=8553, Unknown=0, NotChecked=0, Total=9120 [2021-12-07 00:43:05,117 INFO L87 Difference]: Start difference. First operand 48 states and 54 transitions. Second operand has 96 states, 96 states have (on average 1.3854166666666667) internal successors, (133), 96 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:43:10,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:43:10,840 INFO L93 Difference]: Finished difference Result 126 states and 144 transitions. [2021-12-07 00:43:10,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-12-07 00:43:10,840 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 1.3854166666666667) internal successors, (133), 96 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-12-07 00:43:10,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:43:10,842 INFO L225 Difference]: With dead ends: 126 [2021-12-07 00:43:10,843 INFO L226 Difference]: Without dead ends: 120 [2021-12-07 00:43:10,848 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 25 SyntacticMatches, 15 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5736 ImplicationChecksByTransitivity, 16.2s TimeCoverageRelationStatistics Valid=1058, Invalid=18402, Unknown=0, NotChecked=0, Total=19460 [2021-12-07 00:43:10,849 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 78 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 450 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 1265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 785 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-07 00:43:10,849 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 190 Invalid, 1265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 450 Invalid, 0 Unknown, 785 Unchecked, 0.2s Time] [2021-12-07 00:43:10,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-12-07 00:43:10,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 77. [2021-12-07 00:43:10,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.1578947368421053) internal successors, (88), 76 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) [2021-12-07 00:43:10,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 88 transitions. [2021-12-07 00:43:10,862 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 88 transitions. Word has length 47 [2021-12-07 00:43:10,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:43:10,863 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 88 transitions. [2021-12-07 00:43:10,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 1.3854166666666667) internal successors, (133), 96 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:43:10,863 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 88 transitions. [2021-12-07 00:43:10,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-07 00:43:10,864 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:43:10,864 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:43:10,884 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-07 00:43:11,065 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-12-07 00:43:11,066 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:43:11,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:43:11,068 INFO L85 PathProgramCache]: Analyzing trace with hash -1235984134, now seen corresponding path program 4 times [2021-12-07 00:43:11,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:43:11,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642854859] [2021-12-07 00:43:11,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:43:11,069 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:43:11,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:43:11,163 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-07 00:43:11,163 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:43:11,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642854859] [2021-12-07 00:43:11,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642854859] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:43:11,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914933146] [2021-12-07 00:43:11,164 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-07 00:43:11,164 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:43:11,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:43:11,164 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:43:11,165 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-07 00:43:11,196 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-07 00:43:11,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:43:11,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-07 00:43:11,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:43:11,283 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-07 00:43:11,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:43:11,336 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-07 00:43:11,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914933146] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:43:11,337 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:43:11,337 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2021-12-07 00:43:11,337 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313586016] [2021-12-07 00:43:11,337 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:43:11,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-07 00:43:11,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:43:11,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-07 00:43:11,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-12-07 00:43:11,338 INFO L87 Difference]: Start difference. First operand 77 states and 88 transitions. Second operand has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 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) [2021-12-07 00:43:11,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:43:11,457 INFO L93 Difference]: Finished difference Result 152 states and 174 transitions. [2021-12-07 00:43:11,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-07 00:43:11,457 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 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 49 [2021-12-07 00:43:11,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:43:11,458 INFO L225 Difference]: With dead ends: 152 [2021-12-07 00:43:11,458 INFO L226 Difference]: Without dead ends: 80 [2021-12-07 00:43:11,459 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-12-07 00:43:11,459 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 61 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 00:43:11,459 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 87 Invalid, 339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 00:43:11,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-12-07 00:43:11,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2021-12-07 00:43:11,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.1538461538461537) internal successors, (90), 78 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:43:11,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 90 transitions. [2021-12-07 00:43:11,467 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 90 transitions. Word has length 49 [2021-12-07 00:43:11,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:43:11,467 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 90 transitions. [2021-12-07 00:43:11,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 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) [2021-12-07 00:43:11,467 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 90 transitions. [2021-12-07 00:43:11,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-07 00:43:11,468 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:43:11,468 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:43:11,487 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-07 00:43:11,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:43:11,670 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:43:11,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:43:11,671 INFO L85 PathProgramCache]: Analyzing trace with hash -436136292, now seen corresponding path program 5 times [2021-12-07 00:43:11,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:43:11,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573867873] [2021-12-07 00:43:11,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:43:11,673 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:43:11,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:43:11,756 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-07 00:43:11,756 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:43:11,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573867873] [2021-12-07 00:43:11,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573867873] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:43:11,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050206358] [2021-12-07 00:43:11,757 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-07 00:43:11,757 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:43:11,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:43:11,758 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:43:11,758 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-07 00:43:11,820 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-12-07 00:43:11,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:43:11,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-07 00:43:11,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:43:11,895 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-07 00:43:11,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:43:11,943 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-07 00:43:11,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050206358] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:43:11,943 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:43:11,944 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2021-12-07 00:43:11,944 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394050171] [2021-12-07 00:43:11,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:43:11,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-07 00:43:11,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:43:11,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-07 00:43:11,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-12-07 00:43:11,945 INFO L87 Difference]: Start difference. First operand 79 states and 90 transitions. Second operand has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 14 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) [2021-12-07 00:43:12,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:43:12,061 INFO L93 Difference]: Finished difference Result 125 states and 145 transitions. [2021-12-07 00:43:12,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-07 00:43:12,061 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 14 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 51 [2021-12-07 00:43:12,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:43:12,062 INFO L225 Difference]: With dead ends: 125 [2021-12-07 00:43:12,062 INFO L226 Difference]: Without dead ends: 68 [2021-12-07 00:43:12,063 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 95 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2021-12-07 00:43:12,063 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 112 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 00:43:12,064 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 37 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 00:43:12,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-12-07 00:43:12,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 62. [2021-12-07 00:43:12,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.1147540983606556) internal successors, (68), 61 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:43:12,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 68 transitions. [2021-12-07 00:43:12,070 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 68 transitions. Word has length 51 [2021-12-07 00:43:12,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:43:12,071 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 68 transitions. [2021-12-07 00:43:12,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 14 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) [2021-12-07 00:43:12,071 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 68 transitions. [2021-12-07 00:43:12,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-07 00:43:12,072 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:43:12,072 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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, 1] [2021-12-07 00:43:12,092 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-07 00:43:12,273 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-12-07 00:43:12,273 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:43:12,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:43:12,275 INFO L85 PathProgramCache]: Analyzing trace with hash -1781065978, now seen corresponding path program 6 times [2021-12-07 00:43:12,275 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:43:12,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217013325] [2021-12-07 00:43:12,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:43:12,276 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:43:12,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:43:14,662 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:43:14,662 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:43:14,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217013325] [2021-12-07 00:43:14,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217013325] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:43:14,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546383702] [2021-12-07 00:43:14,662 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-07 00:43:14,662 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:43:14,662 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:43:14,663 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:43:14,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-07 00:43:14,706 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-12-07 00:43:14,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:43:14,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 85 conjunts are in the unsatisfiable core [2021-12-07 00:43:14,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:43:16,588 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-07 00:43:16,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:43:19,603 INFO L354 Elim1Store]: treesize reduction 114, result has 46.0 percent of original size [2021-12-07 00:43:19,603 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 53 treesize of output 108 [2021-12-07 00:43:19,799 INFO L354 Elim1Store]: treesize reduction 198, result has 6.2 percent of original size [2021-12-07 00:43:19,799 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 52 treesize of output 23 [2021-12-07 00:43:19,880 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-07 00:43:19,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546383702] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:43:19,881 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:43:19,881 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 38, 37] total 100 [2021-12-07 00:43:19,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324076512] [2021-12-07 00:43:19,881 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:43:19,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2021-12-07 00:43:19,881 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:43:19,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2021-12-07 00:43:19,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=365, Invalid=9535, Unknown=0, NotChecked=0, Total=9900 [2021-12-07 00:43:19,885 INFO L87 Difference]: Start difference. First operand 62 states and 68 transitions. Second operand has 100 states, 100 states have (on average 1.47) internal successors, (147), 100 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:43:31,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:43:31,648 INFO L93 Difference]: Finished difference Result 181 states and 200 transitions. [2021-12-07 00:43:31,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-12-07 00:43:31,649 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 1.47) internal successors, (147), 100 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-12-07 00:43:31,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:43:31,650 INFO L225 Difference]: With dead ends: 181 [2021-12-07 00:43:31,650 INFO L226 Difference]: Without dead ends: 177 [2021-12-07 00:43:31,656 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 54 SyntacticMatches, 17 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6440 ImplicationChecksByTransitivity, 14.8s TimeCoverageRelationStatistics Valid=1334, Invalid=24426, Unknown=0, NotChecked=0, Total=25760 [2021-12-07 00:43:31,657 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 90 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 4552 mSolverCounterSat, 464 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 5016 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 464 IncrementalHoareTripleChecker+Valid, 4552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-12-07 00:43:31,657 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 222 Invalid, 5016 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [464 Valid, 4552 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-12-07 00:43:31,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-12-07 00:43:31,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 91. [2021-12-07 00:43:31,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.1222222222222222) internal successors, (101), 90 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:43:31,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 101 transitions. [2021-12-07 00:43:31,667 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 101 transitions. Word has length 61 [2021-12-07 00:43:31,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:43:31,668 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 101 transitions. [2021-12-07 00:43:31,668 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 1.47) internal successors, (147), 100 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:43:31,668 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 101 transitions. [2021-12-07 00:43:31,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-07 00:43:31,669 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:43:31,669 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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, 1] [2021-12-07 00:43:31,688 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-07 00:43:31,869 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-12-07 00:43:31,870 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:43:31,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:43:31,872 INFO L85 PathProgramCache]: Analyzing trace with hash 2140781352, now seen corresponding path program 7 times [2021-12-07 00:43:31,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:43:31,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043136316] [2021-12-07 00:43:31,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:43:31,873 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:43:31,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:43:31,956 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-07 00:43:31,956 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:43:31,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043136316] [2021-12-07 00:43:31,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043136316] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:43:31,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888852777] [2021-12-07 00:43:31,956 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-07 00:43:31,956 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:43:31,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:43:31,957 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:43:31,957 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-07 00:43:31,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:43:31,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-07 00:43:31,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:43:32,092 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-07 00:43:32,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:43:32,156 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-07 00:43:32,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888852777] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:43:32,157 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:43:32,157 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2021-12-07 00:43:32,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974339427] [2021-12-07 00:43:32,157 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:43:32,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-07 00:43:32,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:43:32,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-07 00:43:32,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2021-12-07 00:43:32,159 INFO L87 Difference]: Start difference. First operand 91 states and 101 transitions. Second operand has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 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) [2021-12-07 00:43:32,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:43:32,330 INFO L93 Difference]: Finished difference Result 217 states and 242 transitions. [2021-12-07 00:43:32,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-07 00:43:32,330 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 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 63 [2021-12-07 00:43:32,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:43:32,331 INFO L225 Difference]: With dead ends: 217 [2021-12-07 00:43:32,331 INFO L226 Difference]: Without dead ends: 94 [2021-12-07 00:43:32,331 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=118, Invalid=344, Unknown=0, NotChecked=0, Total=462 [2021-12-07 00:43:32,332 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 72 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 00:43:32,332 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 87 Invalid, 453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 375 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 00:43:32,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-12-07 00:43:32,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2021-12-07 00:43:32,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.1195652173913044) internal successors, (103), 92 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:43:32,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 103 transitions. [2021-12-07 00:43:32,341 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 103 transitions. Word has length 63 [2021-12-07 00:43:32,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:43:32,341 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 103 transitions. [2021-12-07 00:43:32,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 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) [2021-12-07 00:43:32,342 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 103 transitions. [2021-12-07 00:43:32,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-07 00:43:32,342 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:43:32,342 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 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, 1] [2021-12-07 00:43:32,362 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-07 00:43:32,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:43:32,544 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:43:32,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:43:32,545 INFO L85 PathProgramCache]: Analyzing trace with hash -784405174, now seen corresponding path program 8 times [2021-12-07 00:43:32,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:43:32,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080184825] [2021-12-07 00:43:32,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:43:32,546 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:43:32,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:43:32,632 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-12-07 00:43:32,632 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:43:32,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080184825] [2021-12-07 00:43:32,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080184825] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:43:32,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125858161] [2021-12-07 00:43:32,632 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 00:43:32,632 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:43:32,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:43:32,633 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:43:32,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-07 00:43:32,678 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-07 00:43:32,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:43:32,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-07 00:43:32,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:43:32,759 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-12-07 00:43:32,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:43:32,815 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-12-07 00:43:32,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125858161] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:43:32,816 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:43:32,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2021-12-07 00:43:32,816 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813001655] [2021-12-07 00:43:32,816 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:43:32,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-07 00:43:32,816 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:43:32,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-07 00:43:32,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-07 00:43:32,817 INFO L87 Difference]: Start difference. First operand 93 states and 103 transitions. Second operand has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 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) [2021-12-07 00:43:32,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:43:32,947 INFO L93 Difference]: Finished difference Result 155 states and 175 transitions. [2021-12-07 00:43:32,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-07 00:43:32,948 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 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 65 [2021-12-07 00:43:32,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:43:32,948 INFO L225 Difference]: With dead ends: 155 [2021-12-07 00:43:32,948 INFO L226 Difference]: Without dead ends: 82 [2021-12-07 00:43:32,949 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 122 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=152, Invalid=354, Unknown=0, NotChecked=0, Total=506 [2021-12-07 00:43:32,949 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 155 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 00:43:32,949 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 28 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 00:43:32,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-12-07 00:43:32,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 76. [2021-12-07 00:43:32,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.0933333333333333) internal successors, (82), 75 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) [2021-12-07 00:43:32,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 82 transitions. [2021-12-07 00:43:32,956 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 82 transitions. Word has length 65 [2021-12-07 00:43:32,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:43:32,956 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 82 transitions. [2021-12-07 00:43:32,957 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 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) [2021-12-07 00:43:32,957 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 82 transitions. [2021-12-07 00:43:32,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-12-07 00:43:32,957 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:43:32,957 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:43:32,976 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-07 00:43:33,158 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:43:33,159 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:43:33,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:43:33,161 INFO L85 PathProgramCache]: Analyzing trace with hash 958143540, now seen corresponding path program 9 times [2021-12-07 00:43:33,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:43:33,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868033457] [2021-12-07 00:43:33,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:43:33,162 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:43:33,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:43:36,741 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:43:36,742 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:43:36,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868033457] [2021-12-07 00:43:36,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868033457] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:43:36,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145443754] [2021-12-07 00:43:36,742 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-07 00:43:36,742 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:43:36,742 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:43:36,743 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:43:36,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-07 00:43:36,794 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-12-07 00:43:36,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:43:36,796 WARN L261 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 116 conjunts are in the unsatisfiable core [2021-12-07 00:43:36,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:43:36,872 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 15 treesize of output 11 [2021-12-07 00:43:50,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:43:50,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:43:50,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:43:50,309 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 00:43:50,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 51 [2021-12-07 00:43:50,757 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 7 proven. 96 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-07 00:43:50,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:44:22,567 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 103 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-07 00:44:22,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2145443754] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:44:22,567 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:44:22,567 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 56, 53] total 164 [2021-12-07 00:44:22,567 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702818696] [2021-12-07 00:44:22,567 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:44:22,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 164 states [2021-12-07 00:44:22,568 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:44:22,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 164 interpolants. [2021-12-07 00:44:22,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=866, Invalid=25866, Unknown=0, NotChecked=0, Total=26732 [2021-12-07 00:44:22,570 INFO L87 Difference]: Start difference. First operand 76 states and 82 transitions. Second operand has 164 states, 164 states have (on average 1.274390243902439) internal successors, (209), 164 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:44:50,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:44:50,340 INFO L93 Difference]: Finished difference Result 197 states and 215 transitions. [2021-12-07 00:44:50,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2021-12-07 00:44:50,340 INFO L78 Accepts]: Start accepts. Automaton has has 164 states, 164 states have (on average 1.274390243902439) internal successors, (209), 164 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-12-07 00:44:50,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:44:50,342 INFO L225 Difference]: With dead ends: 197 [2021-12-07 00:44:50,342 INFO L226 Difference]: Without dead ends: 191 [2021-12-07 00:44:50,345 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 40 SyntacticMatches, 8 SemanticMatches, 237 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11612 ImplicationChecksByTransitivity, 64.4s TimeCoverageRelationStatistics Valid=1885, Invalid=54996, Unknown=1, NotChecked=0, Total=56882 [2021-12-07 00:44:50,345 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 67 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 1093 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 3560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 1093 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2392 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-07 00:44:50,346 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 334 Invalid, 3560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 1093 Invalid, 0 Unknown, 2392 Unchecked, 0.7s Time] [2021-12-07 00:44:50,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-12-07 00:44:50,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 121. [2021-12-07 00:44:50,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.1) internal successors, (132), 120 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:44:50,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 132 transitions. [2021-12-07 00:44:50,360 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 132 transitions. Word has length 75 [2021-12-07 00:44:50,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:44:50,360 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 132 transitions. [2021-12-07 00:44:50,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 164 states, 164 states have (on average 1.274390243902439) internal successors, (209), 164 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:44:50,360 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 132 transitions. [2021-12-07 00:44:50,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-07 00:44:50,361 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:44:50,361 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:44:50,380 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-12-07 00:44:50,561 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:44:50,562 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:44:50,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:44:50,563 INFO L85 PathProgramCache]: Analyzing trace with hash 1706175702, now seen corresponding path program 10 times [2021-12-07 00:44:50,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:44:50,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131326311] [2021-12-07 00:44:50,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:44:50,565 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:44:50,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:44:50,673 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-12-07 00:44:50,674 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:44:50,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131326311] [2021-12-07 00:44:50,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131326311] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:44:50,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189157819] [2021-12-07 00:44:50,674 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-07 00:44:50,674 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:44:50,674 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:44:50,675 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:44:50,676 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-07 00:44:50,721 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-07 00:44:50,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:44:50,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-07 00:44:50,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:44:50,871 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-12-07 00:44:50,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:44:50,945 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-12-07 00:44:50,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189157819] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:44:50,945 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:44:50,945 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2021-12-07 00:44:50,945 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458243757] [2021-12-07 00:44:50,945 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:44:50,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-07 00:44:50,946 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:44:50,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-07 00:44:50,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2021-12-07 00:44:50,946 INFO L87 Difference]: Start difference. First operand 121 states and 132 transitions. Second operand has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:44:51,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:44:51,171 INFO L93 Difference]: Finished difference Result 240 states and 262 transitions. [2021-12-07 00:44:51,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-07 00:44:51,171 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-12-07 00:44:51,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:44:51,172 INFO L225 Difference]: With dead ends: 240 [2021-12-07 00:44:51,172 INFO L226 Difference]: Without dead ends: 124 [2021-12-07 00:44:51,173 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=161, Invalid=489, Unknown=0, NotChecked=0, Total=650 [2021-12-07 00:44:51,173 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 98 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 527 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-07 00:44:51,174 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 101 Invalid, 610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 527 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-07 00:44:51,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-12-07 00:44:51,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 123. [2021-12-07 00:44:51,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 1.098360655737705) internal successors, (134), 122 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:44:51,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 134 transitions. [2021-12-07 00:44:51,187 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 134 transitions. Word has length 77 [2021-12-07 00:44:51,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:44:51,187 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 134 transitions. [2021-12-07 00:44:51,187 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:44:51,188 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 134 transitions. [2021-12-07 00:44:51,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-07 00:44:51,188 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:44:51,188 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:44:51,208 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-12-07 00:44:51,389 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-07 00:44:51,390 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:44:51,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:44:51,391 INFO L85 PathProgramCache]: Analyzing trace with hash 1014758264, now seen corresponding path program 11 times [2021-12-07 00:44:51,391 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:44:51,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723540895] [2021-12-07 00:44:51,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:44:51,392 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:44:51,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:44:51,500 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2021-12-07 00:44:51,500 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:44:51,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723540895] [2021-12-07 00:44:51,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723540895] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:44:51,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130243133] [2021-12-07 00:44:51,500 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-07 00:44:51,501 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:44:51,501 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:44:51,501 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:44:51,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-07 00:44:51,667 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-12-07 00:44:51,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:44:51,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-07 00:44:51,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:44:51,834 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2021-12-07 00:44:51,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:44:51,939 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2021-12-07 00:44:51,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130243133] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:44:51,939 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:44:51,939 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 29 [2021-12-07 00:44:51,939 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124156125] [2021-12-07 00:44:51,939 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:44:51,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-07 00:44:51,940 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:44:51,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-07 00:44:51,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=685, Unknown=0, NotChecked=0, Total=812 [2021-12-07 00:44:51,940 INFO L87 Difference]: Start difference. First operand 123 states and 134 transitions. Second operand has 29 states, 29 states have (on average 3.3448275862068964) internal successors, (97), 29 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) [2021-12-07 00:44:52,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:44:52,189 INFO L93 Difference]: Finished difference Result 185 states and 205 transitions. [2021-12-07 00:44:52,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-07 00:44:52,189 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.3448275862068964) internal successors, (97), 29 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 79 [2021-12-07 00:44:52,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:44:52,189 INFO L225 Difference]: With dead ends: 185 [2021-12-07 00:44:52,190 INFO L226 Difference]: Without dead ends: 96 [2021-12-07 00:44:52,190 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=241, Invalid=1091, Unknown=0, NotChecked=0, Total=1332 [2021-12-07 00:44:52,190 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 256 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 367 mSolverCounterSat, 222 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 222 IncrementalHoareTripleChecker+Valid, 367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-07 00:44:52,191 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [256 Valid, 47 Invalid, 589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [222 Valid, 367 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-07 00:44:52,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-12-07 00:44:52,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 90. [2021-12-07 00:44:52,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 1.0786516853932584) internal successors, (96), 89 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:44:52,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 96 transitions. [2021-12-07 00:44:52,199 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 96 transitions. Word has length 79 [2021-12-07 00:44:52,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:44:52,199 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 96 transitions. [2021-12-07 00:44:52,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.3448275862068964) internal successors, (97), 29 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) [2021-12-07 00:44:52,199 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 96 transitions. [2021-12-07 00:44:52,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-12-07 00:44:52,200 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:44:52,200 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:44:52,219 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-12-07 00:44:52,401 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-07 00:44:52,401 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:44:52,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:44:52,403 INFO L85 PathProgramCache]: Analyzing trace with hash -1296238366, now seen corresponding path program 12 times [2021-12-07 00:44:52,403 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:44:52,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702889418] [2021-12-07 00:44:52,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:44:52,404 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:44:52,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:44:58,473 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 6 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:44:58,474 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:44:58,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702889418] [2021-12-07 00:44:58,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702889418] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:44:58,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751809483] [2021-12-07 00:44:58,474 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-07 00:44:58,474 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:44:58,474 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:44:58,475 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:44:58,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-07 00:44:58,536 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-12-07 00:44:58,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:44:58,539 WARN L261 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 144 conjunts are in the unsatisfiable core [2021-12-07 00:44:58,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:45:16,840 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 00:45:16,840 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 17 treesize of output 18 [2021-12-07 00:45:17,363 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 3 proven. 171 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-07 00:45:17,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:46:06,719 INFO L354 Elim1Store]: treesize reduction 387, result has 41.2 percent of original size [2021-12-07 00:46:06,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 176 treesize of output 301 [2021-12-07 00:46:08,700 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 0 proven. 159 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-07 00:46:08,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751809483] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:46:08,700 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:46:08,700 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 71, 65] total 201 [2021-12-07 00:46:08,700 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213507503] [2021-12-07 00:46:08,700 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:46:08,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 201 states [2021-12-07 00:46:08,701 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:46:08,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 201 interpolants. [2021-12-07 00:46:08,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=870, Invalid=39330, Unknown=0, NotChecked=0, Total=40200 [2021-12-07 00:46:08,703 INFO L87 Difference]: Start difference. First operand 90 states and 96 transitions. Second operand has 201 states, 201 states have (on average 1.228855721393035) internal successors, (247), 201 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:46:45,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:46:45,208 INFO L93 Difference]: Finished difference Result 208 states and 224 transitions. [2021-12-07 00:46:45,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2021-12-07 00:46:45,209 INFO L78 Accepts]: Start accepts. Automaton has has 201 states, 201 states have (on average 1.228855721393035) internal successors, (247), 201 states have internal predecessors, (247), 0 states have call successors, (0), 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 89 [2021-12-07 00:46:45,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:46:45,210 INFO L225 Difference]: With dead ends: 208 [2021-12-07 00:46:45,210 INFO L226 Difference]: Without dead ends: 202 [2021-12-07 00:46:45,213 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 46 SyntacticMatches, 8 SemanticMatches, 287 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16840 ImplicationChecksByTransitivity, 93.8s TimeCoverageRelationStatistics Valid=2162, Invalid=81070, Unknown=0, NotChecked=0, Total=83232 [2021-12-07 00:46:45,214 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 58 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 1637 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 3860 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 1637 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2114 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-07 00:46:45,214 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 365 Invalid, 3860 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 1637 Invalid, 0 Unknown, 2114 Unchecked, 1.1s Time] [2021-12-07 00:46:45,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-12-07 00:46:45,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 131. [2021-12-07 00:46:45,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 1.0846153846153845) internal successors, (141), 130 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:46:45,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 141 transitions. [2021-12-07 00:46:45,230 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 141 transitions. Word has length 89 [2021-12-07 00:46:45,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:46:45,231 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 141 transitions. [2021-12-07 00:46:45,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 201 states, 201 states have (on average 1.228855721393035) internal successors, (247), 201 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:46:45,231 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 141 transitions. [2021-12-07 00:46:45,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-07 00:46:45,232 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:46:45,232 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:46:45,251 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-12-07 00:46:45,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-07 00:46:45,433 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:46:45,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:46:45,434 INFO L85 PathProgramCache]: Analyzing trace with hash -91318780, now seen corresponding path program 13 times [2021-12-07 00:46:45,435 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:46:45,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533776648] [2021-12-07 00:46:45,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:46:45,436 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:46:45,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:46:45,558 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 27 proven. 34 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2021-12-07 00:46:45,559 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:46:45,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533776648] [2021-12-07 00:46:45,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533776648] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:46:45,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286078786] [2021-12-07 00:46:45,559 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-07 00:46:45,559 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:46:45,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:46:45,560 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:46:45,560 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-07 00:46:45,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:46:45,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-07 00:46:45,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:46:45,769 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2021-12-07 00:46:45,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:46:45,853 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2021-12-07 00:46:45,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286078786] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:46:45,854 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:46:45,854 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2021-12-07 00:46:45,854 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624903475] [2021-12-07 00:46:45,854 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:46:45,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-07 00:46:45,854 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:46:45,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-07 00:46:45,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=382, Unknown=0, NotChecked=0, Total=506 [2021-12-07 00:46:45,855 INFO L87 Difference]: Start difference. First operand 131 states and 141 transitions. Second operand has 23 states, 23 states have (on average 3.0) internal successors, (69), 23 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) [2021-12-07 00:46:46,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:46:46,132 INFO L93 Difference]: Finished difference Result 313 states and 338 transitions. [2021-12-07 00:46:46,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-07 00:46:46,132 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.0) internal successors, (69), 23 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 91 [2021-12-07 00:46:46,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:46:46,133 INFO L225 Difference]: With dead ends: 313 [2021-12-07 00:46:46,133 INFO L226 Difference]: Without dead ends: 134 [2021-12-07 00:46:46,133 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=211, Invalid=659, Unknown=0, NotChecked=0, Total=870 [2021-12-07 00:46:46,134 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 102 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 569 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 569 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-07 00:46:46,134 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 98 Invalid, 677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 569 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-07 00:46:46,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-12-07 00:46:46,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 133. [2021-12-07 00:46:46,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 1.0833333333333333) internal successors, (143), 132 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:46:46,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 143 transitions. [2021-12-07 00:46:46,150 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 143 transitions. Word has length 91 [2021-12-07 00:46:46,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:46:46,150 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 143 transitions. [2021-12-07 00:46:46,150 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.0) internal successors, (69), 23 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) [2021-12-07 00:46:46,150 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 143 transitions. [2021-12-07 00:46:46,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-12-07 00:46:46,150 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:46:46,150 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:46:46,169 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-12-07 00:46:46,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-07 00:46:46,352 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:46:46,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:46:46,353 INFO L85 PathProgramCache]: Analyzing trace with hash 703668518, now seen corresponding path program 14 times [2021-12-07 00:46:46,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:46:46,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469943670] [2021-12-07 00:46:46,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:46:46,354 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:46:46,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:46:46,463 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 16 proven. 45 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2021-12-07 00:46:46,463 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:46:46,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469943670] [2021-12-07 00:46:46,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469943670] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:46:46,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038256575] [2021-12-07 00:46:46,463 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 00:46:46,463 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:46:46,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:46:46,464 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:46:46,464 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-07 00:46:46,513 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-07 00:46:46,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:46:46,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-07 00:46:46,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:46:46,634 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2021-12-07 00:46:46,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:46:46,725 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2021-12-07 00:46:46,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038256575] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:46:46,725 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:46:46,725 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2021-12-07 00:46:46,725 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96914039] [2021-12-07 00:46:46,725 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:46:46,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-07 00:46:46,726 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:46:46,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-07 00:46:46,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=377, Unknown=0, NotChecked=0, Total=506 [2021-12-07 00:46:46,726 INFO L87 Difference]: Start difference. First operand 133 states and 143 transitions. Second operand has 23 states, 23 states have (on average 3.0) internal successors, (69), 23 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) [2021-12-07 00:46:46,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:46:46,938 INFO L93 Difference]: Finished difference Result 215 states and 235 transitions. [2021-12-07 00:46:46,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-07 00:46:46,938 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.0) internal successors, (69), 23 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 93 [2021-12-07 00:46:46,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:46:46,939 INFO L225 Difference]: With dead ends: 215 [2021-12-07 00:46:46,939 INFO L226 Difference]: Without dead ends: 110 [2021-12-07 00:46:46,939 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 176 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=273, Invalid=657, Unknown=0, NotChecked=0, Total=930 [2021-12-07 00:46:46,940 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 318 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 271 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 318 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 271 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-07 00:46:46,940 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [318 Valid, 33 Invalid, 541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [271 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-07 00:46:46,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-12-07 00:46:46,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 104. [2021-12-07 00:46:46,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 1.0679611650485437) internal successors, (110), 103 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:46:46,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 110 transitions. [2021-12-07 00:46:46,952 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 110 transitions. Word has length 93 [2021-12-07 00:46:46,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:46:46,952 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 110 transitions. [2021-12-07 00:46:46,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.0) internal successors, (69), 23 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) [2021-12-07 00:46:46,952 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 110 transitions. [2021-12-07 00:46:46,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-12-07 00:46:46,953 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:46:46,953 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:46:46,978 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-12-07 00:46:47,153 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-07 00:46:47,154 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:46:47,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:46:47,155 INFO L85 PathProgramCache]: Analyzing trace with hash -1101361904, now seen corresponding path program 15 times [2021-12-07 00:46:47,155 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:46:47,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896350362] [2021-12-07 00:46:47,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:46:47,156 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:46:47,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:46:56,430 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 252 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:46:56,430 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:46:56,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896350362] [2021-12-07 00:46:56,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896350362] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:46:56,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073988067] [2021-12-07 00:46:56,431 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-07 00:46:56,431 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:46:56,431 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:46:56,432 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:46:56,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-07 00:46:56,511 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-12-07 00:46:56,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:46:56,515 WARN L261 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 172 conjunts are in the unsatisfiable core [2021-12-07 00:46:56,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:46:56,647 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 15 treesize of output 11 [2021-12-07 00:47:37,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:47:37,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:47:37,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:47:37,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:47:37,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:47:37,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:47:37,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:47:37,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:47:37,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:47:37,833 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 00:47:37,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 54 treesize of output 99 [2021-12-07 00:47:38,692 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 7 proven. 236 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-07 00:47:38,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:49:15,941 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 227 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-07 00:49:15,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073988067] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:49:15,941 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:49:15,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 82, 77] total 237 [2021-12-07 00:49:15,942 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258612501] [2021-12-07 00:49:15,942 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:49:15,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 237 states [2021-12-07 00:49:15,942 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:49:15,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 237 interpolants. [2021-12-07 00:49:15,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1318, Invalid=54613, Unknown=1, NotChecked=0, Total=55932 [2021-12-07 00:49:15,945 INFO L87 Difference]: Start difference. First operand 104 states and 110 transitions. Second operand has 237 states, 237 states have (on average 1.2025316455696202) internal successors, (285), 237 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:50:06,782 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 101 [2021-12-07 00:50:06,782 WARN L228 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2021-12-07 00:50:06,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-12-07 00:50:06,787 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 359 GetRequests, 50 SyntacticMatches, 9 SemanticMatches, 299 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16062 ImplicationChecksByTransitivity, 170.8s TimeCoverageRelationStatistics Valid=2896, Invalid=87403, Unknown=1, NotChecked=0, Total=90300 [2021-12-07 00:50:06,787 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 15 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 1719 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 4216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 1719 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2412 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-07 00:50:06,787 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 102 Invalid, 4216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 1719 Invalid, 0 Unknown, 2412 Unchecked, 1.3s Time] [2021-12-07 00:50:06,807 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-12-07 00:50:06,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:50:06,989 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:241) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseCheckSatResult(Executor.java:260) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.checkSat(Scriptor.java:155) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.checkSat(ManagedScript.java:139) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker.checkImplication(MonolithicImplicationChecker.java:85) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.compare(PredicateUnifier.java:899) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.(PredicateUnifier.java:773) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:345) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicateForConjunction(PredicateUnifier.java:388) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicateForConjunction(PredicateUnifier.java:229) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.getOrConstructPredicate(DeterministicInterpolantAutomaton.java:282) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.constructSuccessorsAndTransitions(DeterministicInterpolantAutomaton.java:304) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:79) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:213) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:216) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:208) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1058) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:960) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:182) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:868) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:784) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:462) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:420) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1465) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:658) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:383) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:237) ... 49 more [2021-12-07 00:50:06,998 INFO L158 Benchmark]: Toolchain (without parser) took 439267.70ms. Allocated memory was 111.1MB in the beginning and 195.0MB in the end (delta: 83.9MB). Free memory was 82.5MB in the beginning and 80.7MB in the end (delta: 1.8MB). Peak memory consumption was 86.7MB. Max. memory is 16.1GB. [2021-12-07 00:50:06,999 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 111.1MB. Free memory is still 67.5MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-07 00:50:07,000 INFO L158 Benchmark]: CACSL2BoogieTranslator took 197.00ms. Allocated memory is still 111.1MB. Free memory was 82.2MB in the beginning and 84.9MB in the end (delta: -2.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-07 00:50:07,001 INFO L158 Benchmark]: Boogie Procedure Inliner took 34.74ms. Allocated memory is still 111.1MB. Free memory was 84.9MB in the beginning and 83.3MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-07 00:50:07,002 INFO L158 Benchmark]: Boogie Preprocessor took 25.47ms. Allocated memory is still 111.1MB. Free memory was 83.3MB in the beginning and 82.1MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-07 00:50:07,003 INFO L158 Benchmark]: RCFGBuilder took 206.04ms. Allocated memory is still 111.1MB. Free memory was 82.1MB in the beginning and 71.0MB in the end (delta: 11.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-07 00:50:07,003 INFO L158 Benchmark]: TraceAbstraction took 438799.36ms. Allocated memory was 111.1MB in the beginning and 195.0MB in the end (delta: 83.9MB). Free memory was 70.7MB in the beginning and 80.7MB in the end (delta: -10.0MB). Peak memory consumption was 77.6MB. Max. memory is 16.1GB. [2021-12-07 00:50:07,005 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 111.1MB. Free memory is still 67.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 197.00ms. Allocated memory is still 111.1MB. Free memory was 82.2MB in the beginning and 84.9MB in the end (delta: -2.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 34.74ms. Allocated memory is still 111.1MB. Free memory was 84.9MB in the beginning and 83.3MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 25.47ms. Allocated memory is still 111.1MB. Free memory was 83.3MB in the beginning and 82.1MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 206.04ms. Allocated memory is still 111.1MB. Free memory was 82.1MB in the beginning and 71.0MB in the end (delta: 11.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 438799.36ms. Allocated memory was 111.1MB in the beginning and 195.0MB in the end (delta: 83.9MB). Free memory was 70.7MB in the beginning and 80.7MB in the end (delta: -10.0MB). Peak memory consumption was 77.6MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") : de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:241) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-crafted/zero_sum_m3.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/bin/uautomizer-DrprNOufMa --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1743decb4413dd023f2c21969cafbefd9f03a99467b1795f9affedc42875deb2 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-07 00:50:08,298 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-07 00:50:08,300 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-07 00:50:08,330 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-07 00:50:08,331 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-07 00:50:08,332 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-07 00:50:08,334 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-07 00:50:08,337 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-07 00:50:08,339 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-07 00:50:08,340 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-07 00:50:08,341 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-07 00:50:08,342 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-07 00:50:08,343 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-07 00:50:08,344 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-07 00:50:08,346 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-07 00:50:08,348 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-07 00:50:08,349 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-07 00:50:08,350 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-07 00:50:08,357 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-07 00:50:08,359 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-07 00:50:08,361 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-07 00:50:08,363 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-07 00:50:08,364 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-07 00:50:08,365 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-07 00:50:08,369 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-07 00:50:08,369 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-07 00:50:08,370 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-07 00:50:08,371 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-07 00:50:08,371 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-07 00:50:08,373 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-07 00:50:08,373 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-07 00:50:08,374 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-07 00:50:08,375 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-07 00:50:08,376 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-07 00:50:08,377 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-07 00:50:08,377 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-07 00:50:08,378 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-07 00:50:08,378 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-07 00:50:08,378 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-07 00:50:08,379 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-07 00:50:08,380 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-07 00:50:08,381 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-12-07 00:50:08,406 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-07 00:50:08,406 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-07 00:50:08,406 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-07 00:50:08,406 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-07 00:50:08,407 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-07 00:50:08,407 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-07 00:50:08,408 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-07 00:50:08,408 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-07 00:50:08,408 INFO L138 SettingsManager]: * Use SBE=true [2021-12-07 00:50:08,409 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-07 00:50:08,409 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-07 00:50:08,409 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-07 00:50:08,409 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-07 00:50:08,409 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-07 00:50:08,410 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-07 00:50:08,410 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-07 00:50:08,410 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-07 00:50:08,410 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-07 00:50:08,410 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-07 00:50:08,411 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-07 00:50:08,411 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-07 00:50:08,411 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-07 00:50:08,411 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-07 00:50:08,411 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-07 00:50:08,412 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-07 00:50:08,412 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-07 00:50:08,412 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-07 00:50:08,412 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-07 00:50:08,412 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-07 00:50:08,413 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-07 00:50:08,413 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-07 00:50:08,413 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-07 00:50:08,413 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-07 00:50:08,413 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-07 00:50:08,414 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-07 00:50:08,414 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-07 00:50:08,414 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-07 00:50:08,414 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/bin/uautomizer-DrprNOufMa/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1743decb4413dd023f2c21969cafbefd9f03a99467b1795f9affedc42875deb2 [2021-12-07 00:50:08,639 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-07 00:50:08,653 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-07 00:50:08,655 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-07 00:50:08,656 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-07 00:50:08,657 INFO L275 PluginConnector]: CDTParser initialized [2021-12-07 00:50:08,658 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/array-crafted/zero_sum_m3.c [2021-12-07 00:50:08,700 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/bin/uautomizer-DrprNOufMa/data/1d2fcaec5/44fadfed5744491f98438fd0baa2c08a/FLAG51a88f570 [2021-12-07 00:50:09,087 INFO L306 CDTParser]: Found 1 translation units. [2021-12-07 00:50:09,088 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/sv-benchmarks/c/array-crafted/zero_sum_m3.c [2021-12-07 00:50:09,094 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/bin/uautomizer-DrprNOufMa/data/1d2fcaec5/44fadfed5744491f98438fd0baa2c08a/FLAG51a88f570 [2021-12-07 00:50:09,103 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/bin/uautomizer-DrprNOufMa/data/1d2fcaec5/44fadfed5744491f98438fd0baa2c08a [2021-12-07 00:50:09,105 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-07 00:50:09,106 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-07 00:50:09,108 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-07 00:50:09,108 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-07 00:50:09,110 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-07 00:50:09,111 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 12:50:09" (1/1) ... [2021-12-07 00:50:09,112 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@601fd993 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:50:09, skipping insertion in model container [2021-12-07 00:50:09,112 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 12:50:09" (1/1) ... [2021-12-07 00:50:09,117 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-07 00:50:09,128 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-07 00:50:09,226 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/sv-benchmarks/c/array-crafted/zero_sum_m3.c[402,415] [2021-12-07 00:50:09,240 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-07 00:50:09,248 INFO L203 MainTranslator]: Completed pre-run [2021-12-07 00:50:09,270 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/sv-benchmarks/c/array-crafted/zero_sum_m3.c[402,415] [2021-12-07 00:50:09,286 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-07 00:50:09,298 INFO L208 MainTranslator]: Completed translation [2021-12-07 00:50:09,299 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:50:09 WrapperNode [2021-12-07 00:50:09,299 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-07 00:50:09,300 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-07 00:50:09,300 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-07 00:50:09,300 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-07 00:50:09,305 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:50:09" (1/1) ... [2021-12-07 00:50:09,312 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:50:09" (1/1) ... [2021-12-07 00:50:09,334 INFO L137 Inliner]: procedures = 17, calls = 17, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 103 [2021-12-07 00:50:09,334 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-07 00:50:09,335 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-07 00:50:09,335 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-07 00:50:09,335 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-07 00:50:09,341 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:50:09" (1/1) ... [2021-12-07 00:50:09,341 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:50:09" (1/1) ... [2021-12-07 00:50:09,345 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:50:09" (1/1) ... [2021-12-07 00:50:09,345 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:50:09" (1/1) ... [2021-12-07 00:50:09,353 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:50:09" (1/1) ... [2021-12-07 00:50:09,358 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:50:09" (1/1) ... [2021-12-07 00:50:09,360 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:50:09" (1/1) ... [2021-12-07 00:50:09,363 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-07 00:50:09,364 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-07 00:50:09,364 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-07 00:50:09,364 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-07 00:50:09,365 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:50:09" (1/1) ... [2021-12-07 00:50:09,371 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-07 00:50:09,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:50:09,389 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-07 00:50:09,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-07 00:50:09,428 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-07 00:50:09,429 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-07 00:50:09,429 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-07 00:50:09,429 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE2 [2021-12-07 00:50:09,429 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-07 00:50:09,429 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-07 00:50:09,430 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE2 [2021-12-07 00:50:09,430 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-07 00:50:09,495 INFO L236 CfgBuilder]: Building ICFG [2021-12-07 00:50:09,496 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-07 00:50:09,665 INFO L277 CfgBuilder]: Performing block encoding [2021-12-07 00:50:09,671 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-07 00:50:09,671 INFO L301 CfgBuilder]: Removed 7 assume(true) statements. [2021-12-07 00:50:09,673 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 12:50:09 BoogieIcfgContainer [2021-12-07 00:50:09,673 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-07 00:50:09,675 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-07 00:50:09,675 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-07 00:50:09,677 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-07 00:50:09,677 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 12:50:09" (1/3) ... [2021-12-07 00:50:09,678 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73cb9c2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 12:50:09, skipping insertion in model container [2021-12-07 00:50:09,678 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:50:09" (2/3) ... [2021-12-07 00:50:09,679 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73cb9c2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 12:50:09, skipping insertion in model container [2021-12-07 00:50:09,679 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 12:50:09" (3/3) ... [2021-12-07 00:50:09,680 INFO L111 eAbstractionObserver]: Analyzing ICFG zero_sum_m3.c [2021-12-07 00:50:09,685 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-07 00:50:09,685 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-07 00:50:09,736 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-07 00:50:09,742 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-07 00:50:09,742 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-07 00:50:09,754 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 30 states have (on average 1.5666666666666667) internal successors, (47), 31 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) [2021-12-07 00:50:09,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-07 00:50:09,760 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:50:09,761 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:50:09,761 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:50:09,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:50:09,767 INFO L85 PathProgramCache]: Analyzing trace with hash 534528496, now seen corresponding path program 1 times [2021-12-07 00:50:09,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 00:50:09,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [230629678] [2021-12-07 00:50:09,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:50:09,777 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 00:50:09,778 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 00:50:09,778 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 00:50:09,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-07 00:50:09,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:09,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 1 conjunts are in the unsatisfiable core [2021-12-07 00:50:09,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:50:09,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:50:09,880 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 00:50:09,881 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 00:50:09,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [230629678] [2021-12-07 00:50:09,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [230629678] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:50:09,882 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:50:09,882 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-07 00:50:09,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370002402] [2021-12-07 00:50:09,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:50:09,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-07 00:50:09,888 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 00:50:09,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-07 00:50:09,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-07 00:50:09,917 INFO L87 Difference]: Start difference. First operand has 32 states, 30 states have (on average 1.5666666666666667) internal successors, (47), 31 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) Second operand has 2 states, 2 states have (on average 9.5) internal successors, (19), 2 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) [2021-12-07 00:50:09,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:50:09,933 INFO L93 Difference]: Finished difference Result 59 states and 86 transitions. [2021-12-07 00:50:09,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-07 00:50:09,935 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 9.5) internal successors, (19), 2 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 [2021-12-07 00:50:09,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:50:09,940 INFO L225 Difference]: With dead ends: 59 [2021-12-07 00:50:09,940 INFO L226 Difference]: Without dead ends: 27 [2021-12-07 00:50:09,942 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-07 00:50:09,945 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:50:09,946 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:50:09,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-12-07 00:50:09,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-12-07 00:50:09,969 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) [2021-12-07 00:50:09,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2021-12-07 00:50:09,970 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 19 [2021-12-07 00:50:09,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:50:09,970 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2021-12-07 00:50:09,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 9.5) internal successors, (19), 2 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) [2021-12-07 00:50:09,971 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2021-12-07 00:50:09,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-07 00:50:09,971 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:50:09,971 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:50:09,979 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-12-07 00:50:10,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 00:50:10,173 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:50:10,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:50:10,176 INFO L85 PathProgramCache]: Analyzing trace with hash -697412484, now seen corresponding path program 1 times [2021-12-07 00:50:10,177 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 00:50:10,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1551963226] [2021-12-07 00:50:10,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:50:10,179 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 00:50:10,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 00:50:10,182 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 00:50:10,185 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-07 00:50:10,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:10,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-07 00:50:10,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:50:10,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:50:10,419 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 00:50:10,419 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 00:50:10,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1551963226] [2021-12-07 00:50:10,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1551963226] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:50:10,419 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:50:10,420 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-07 00:50:10,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008999943] [2021-12-07 00:50:10,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:50:10,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-07 00:50:10,421 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 00:50:10,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-07 00:50:10,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-07 00:50:10,422 INFO L87 Difference]: Start difference. First operand 27 states and 33 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) [2021-12-07 00:50:10,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:50:10,475 INFO L93 Difference]: Finished difference Result 42 states and 53 transitions. [2021-12-07 00:50:10,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-07 00:50:10,475 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 [2021-12-07 00:50:10,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:50:10,476 INFO L225 Difference]: With dead ends: 42 [2021-12-07 00:50:10,476 INFO L226 Difference]: Without dead ends: 38 [2021-12-07 00:50:10,477 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-07 00:50:10,478 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 3 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:50:10,479 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 71 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:50:10,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-12-07 00:50:10,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-12-07 00:50:10,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.3243243243243243) internal successors, (49), 37 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:50:10,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 49 transitions. [2021-12-07 00:50:10,487 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 49 transitions. Word has length 19 [2021-12-07 00:50:10,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:50:10,487 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 49 transitions. [2021-12-07 00:50:10,487 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) [2021-12-07 00:50:10,488 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 49 transitions. [2021-12-07 00:50:10,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-07 00:50:10,488 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:50:10,489 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:50:10,496 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-12-07 00:50:10,689 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 00:50:10,690 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:50:10,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:50:10,693 INFO L85 PathProgramCache]: Analyzing trace with hash -145263842, now seen corresponding path program 1 times [2021-12-07 00:50:10,694 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 00:50:10,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1787979395] [2021-12-07 00:50:10,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:50:10,696 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 00:50:10,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 00:50:10,698 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 00:50:10,701 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-12-07 00:50:10,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:10,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-07 00:50:10,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:50:10,846 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-07 00:50:10,846 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 00:50:10,846 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 00:50:10,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1787979395] [2021-12-07 00:50:10,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1787979395] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:50:10,847 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:50:10,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 00:50:10,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731701206] [2021-12-07 00:50:10,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:50:10,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 00:50:10,847 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 00:50:10,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 00:50:10,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:50:10,848 INFO L87 Difference]: Start difference. First operand 38 states and 49 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:50:10,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:50:10,897 INFO L93 Difference]: Finished difference Result 73 states and 95 transitions. [2021-12-07 00:50:10,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 00:50:10,898 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 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 21 [2021-12-07 00:50:10,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:50:10,898 INFO L225 Difference]: With dead ends: 73 [2021-12-07 00:50:10,898 INFO L226 Difference]: Without dead ends: 40 [2021-12-07 00:50:10,899 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:50:10,900 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 1 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:50:10,900 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 46 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:50:10,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-12-07 00:50:10,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2021-12-07 00:50:10,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.3157894736842106) internal successors, (50), 38 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) [2021-12-07 00:50:10,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 50 transitions. [2021-12-07 00:50:10,905 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 50 transitions. Word has length 21 [2021-12-07 00:50:10,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:50:10,906 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 50 transitions. [2021-12-07 00:50:10,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:50:10,906 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 50 transitions. [2021-12-07 00:50:10,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-07 00:50:10,907 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:50:10,907 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:50:10,914 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-12-07 00:50:11,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 00:50:11,109 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:50:11,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:50:11,111 INFO L85 PathProgramCache]: Analyzing trace with hash -1250455616, now seen corresponding path program 1 times [2021-12-07 00:50:11,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 00:50:11,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [332861489] [2021-12-07 00:50:11,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:50:11,114 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 00:50:11,114 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 00:50:11,116 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 00:50:11,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-12-07 00:50:11,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:11,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-07 00:50:11,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:50:11,291 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-07 00:50:11,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:50:11,342 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-07 00:50:11,343 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 00:50:11,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [332861489] [2021-12-07 00:50:11,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [332861489] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:50:11,343 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 00:50:11,343 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-12-07 00:50:11,343 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066915146] [2021-12-07 00:50:11,344 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 00:50:11,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-07 00:50:11,344 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 00:50:11,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-07 00:50:11,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-07 00:50:11,345 INFO L87 Difference]: Start difference. First operand 39 states and 50 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:50:11,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:50:11,427 INFO L93 Difference]: Finished difference Result 75 states and 97 transitions. [2021-12-07 00:50:11,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-07 00:50:11,427 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 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 23 [2021-12-07 00:50:11,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:50:11,428 INFO L225 Difference]: With dead ends: 75 [2021-12-07 00:50:11,428 INFO L226 Difference]: Without dead ends: 42 [2021-12-07 00:50:11,428 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-07 00:50:11,429 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 2 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 00:50:11,429 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 76 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 00:50:11,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-12-07 00:50:11,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2021-12-07 00:50:11,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.3) internal successors, (52), 40 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:50:11,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 52 transitions. [2021-12-07 00:50:11,434 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 52 transitions. Word has length 23 [2021-12-07 00:50:11,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:50:11,434 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 52 transitions. [2021-12-07 00:50:11,435 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:50:11,435 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 52 transitions. [2021-12-07 00:50:11,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-07 00:50:11,435 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:50:11,435 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:50:11,443 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-12-07 00:50:11,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 00:50:11,637 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:50:11,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:50:11,640 INFO L85 PathProgramCache]: Analyzing trace with hash 1812138978, now seen corresponding path program 2 times [2021-12-07 00:50:11,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 00:50:11,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1435490248] [2021-12-07 00:50:11,641 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 00:50:11,642 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 00:50:11,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 00:50:11,645 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 00:50:11,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-12-07 00:50:11,727 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-07 00:50:11,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:50:11,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-07 00:50:11,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:50:11,774 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-07 00:50:11,774 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 00:50:11,774 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 00:50:11,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1435490248] [2021-12-07 00:50:11,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1435490248] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:50:11,775 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:50:11,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-07 00:50:11,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74628735] [2021-12-07 00:50:11,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:50:11,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-07 00:50:11,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 00:50:11,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-07 00:50:11,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-07 00:50:11,776 INFO L87 Difference]: Start difference. First operand 41 states and 52 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:50:11,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:50:11,866 INFO L93 Difference]: Finished difference Result 70 states and 90 transitions. [2021-12-07 00:50:11,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-07 00:50:11,866 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 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 [2021-12-07 00:50:11,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:50:11,867 INFO L225 Difference]: With dead ends: 70 [2021-12-07 00:50:11,867 INFO L226 Difference]: Without dead ends: 42 [2021-12-07 00:50:11,867 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-07 00:50:11,868 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 39 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 00:50:11,868 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 17 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 00:50:11,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-12-07 00:50:11,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 36. [2021-12-07 00:50:11,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.2) internal successors, (42), 35 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:50:11,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2021-12-07 00:50:11,873 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 25 [2021-12-07 00:50:11,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:50:11,873 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2021-12-07 00:50:11,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:50:11,873 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2021-12-07 00:50:11,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-07 00:50:11,874 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:50:11,874 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:50:11,885 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-12-07 00:50:12,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 00:50:12,081 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:50:12,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:50:12,084 INFO L85 PathProgramCache]: Analyzing trace with hash -160084788, now seen corresponding path program 1 times [2021-12-07 00:50:12,085 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 00:50:12,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [357676989] [2021-12-07 00:50:12,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:50:12,087 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 00:50:12,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 00:50:12,090 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 00:50:12,093 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-12-07 00:50:12,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:50:12,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-07 00:50:12,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:50:12,323 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-07 00:50:12,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:50:12,482 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-07 00:50:12,482 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 00:50:12,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [357676989] [2021-12-07 00:50:12,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [357676989] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:50:12,483 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 00:50:12,483 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-12-07 00:50:12,483 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369049379] [2021-12-07 00:50:12,483 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 00:50:12,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-07 00:50:12,483 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 00:50:12,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-07 00:50:12,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-12-07 00:50:12,484 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:50:12,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:50:12,890 INFO L93 Difference]: Finished difference Result 121 states and 149 transitions. [2021-12-07 00:50:12,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-07 00:50:12,891 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-12-07 00:50:12,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:50:12,892 INFO L225 Difference]: With dead ends: 121 [2021-12-07 00:50:12,892 INFO L226 Difference]: Without dead ends: 97 [2021-12-07 00:50:12,892 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=257, Unknown=0, NotChecked=0, Total=380 [2021-12-07 00:50:12,893 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 243 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-07 00:50:12,893 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [243 Valid, 57 Invalid, 414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-07 00:50:12,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-12-07 00:50:12,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 48. [2021-12-07 00:50:12,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.148936170212766) internal successors, (54), 47 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:50:12,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 54 transitions. [2021-12-07 00:50:12,900 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 54 transitions. Word has length 35 [2021-12-07 00:50:12,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:50:12,900 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 54 transitions. [2021-12-07 00:50:12,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:50:12,901 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 54 transitions. [2021-12-07 00:50:12,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-07 00:50:12,902 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:50:12,902 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:50:12,913 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-12-07 00:50:13,102 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 00:50:13,103 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:50:13,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:50:13,105 INFO L85 PathProgramCache]: Analyzing trace with hash -1337652904, now seen corresponding path program 2 times [2021-12-07 00:50:13,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 00:50:13,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1125994575] [2021-12-07 00:50:13,107 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 00:50:13,107 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 00:50:13,108 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 00:50:13,110 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 00:50:13,112 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-12-07 00:50:30,389 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-07 00:50:30,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:50:30,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-07 00:50:30,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:50:32,516 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-12-07 00:50:32,516 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 41 treesize of output 21 [2021-12-07 00:50:32,625 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-07 00:50:32,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:50:48,273 INFO L354 Elim1Store]: treesize reduction 39, result has 52.4 percent of original size [2021-12-07 00:50:48,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 63 [2021-12-07 00:50:59,194 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-07 00:50:59,194 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 00:50:59,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1125994575] [2021-12-07 00:50:59,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1125994575] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:50:59,195 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 00:50:59,195 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25] total 43 [2021-12-07 00:50:59,195 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182007507] [2021-12-07 00:50:59,195 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 00:50:59,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-12-07 00:50:59,195 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 00:50:59,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-12-07 00:50:59,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1691, Unknown=5, NotChecked=0, Total=1806 [2021-12-07 00:50:59,197 INFO L87 Difference]: Start difference. First operand 48 states and 54 transitions. Second operand has 43 states, 43 states have (on average 1.7209302325581395) internal successors, (74), 43 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:51:01,908 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-07 00:51:06,927 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-07 00:51:09,959 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-07 00:51:14,942 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-07 00:51:20,580 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-07 00:51:23,527 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-07 00:51:26,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:51:26,839 INFO L93 Difference]: Finished difference Result 88 states and 99 transitions. [2021-12-07 00:51:26,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-07 00:51:26,840 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7209302325581395) internal successors, (74), 43 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-12-07 00:51:26,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:51:26,841 INFO L225 Difference]: With dead ends: 88 [2021-12-07 00:51:26,841 INFO L226 Difference]: Without dead ends: 84 [2021-12-07 00:51:26,842 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 45 SyntacticMatches, 6 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 36.9s TimeCoverageRelationStatistics Valid=129, Invalid=2028, Unknown=5, NotChecked=0, Total=2162 [2021-12-07 00:51:26,842 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 6 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 1343 mSolverCounterSat, 8 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 1421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 1343 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 64 IncrementalHoareTripleChecker+Unchecked, 17.7s IncrementalHoareTripleChecker+Time [2021-12-07 00:51:26,842 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 184 Invalid, 1421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 1343 Invalid, 6 Unknown, 64 Unchecked, 17.7s Time] [2021-12-07 00:51:26,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-12-07 00:51:26,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 77. [2021-12-07 00:51:26,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.1578947368421053) internal successors, (88), 76 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) [2021-12-07 00:51:26,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 88 transitions. [2021-12-07 00:51:26,849 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 88 transitions. Word has length 47 [2021-12-07 00:51:26,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:51:26,850 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 88 transitions. [2021-12-07 00:51:26,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7209302325581395) internal successors, (74), 43 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:51:26,850 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 88 transitions. [2021-12-07 00:51:26,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-07 00:51:26,851 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:51:26,851 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:51:26,864 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-12-07 00:51:27,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 00:51:27,053 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:51:27,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:51:27,055 INFO L85 PathProgramCache]: Analyzing trace with hash -1235984134, now seen corresponding path program 3 times [2021-12-07 00:51:27,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 00:51:27,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1686947087] [2021-12-07 00:51:27,058 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-07 00:51:27,058 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 00:51:27,059 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 00:51:27,061 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 00:51:27,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-12-07 00:51:27,252 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-07 00:51:27,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:51:27,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-07 00:51:27,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:51:27,390 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-07 00:51:27,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:51:27,553 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-07 00:51:27,553 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 00:51:27,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1686947087] [2021-12-07 00:51:27,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1686947087] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:51:27,554 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 00:51:27,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-12-07 00:51:27,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193975056] [2021-12-07 00:51:27,554 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 00:51:27,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-07 00:51:27,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 00:51:27,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-07 00:51:27,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-12-07 00:51:27,555 INFO L87 Difference]: Start difference. First operand 77 states and 88 transitions. Second operand has 17 states, 17 states have (on average 4.176470588235294) internal successors, (71), 17 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:51:28,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:51:28,078 INFO L93 Difference]: Finished difference Result 154 states and 177 transitions. [2021-12-07 00:51:28,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-07 00:51:28,078 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.176470588235294) internal successors, (71), 17 states have internal predecessors, (71), 0 states have call successors, (0), 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 [2021-12-07 00:51:28,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:51:28,079 INFO L225 Difference]: With dead ends: 154 [2021-12-07 00:51:28,079 INFO L226 Difference]: Without dead ends: 94 [2021-12-07 00:51:28,079 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2021-12-07 00:51:28,080 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 166 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 438 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-07 00:51:28,080 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 57 Invalid, 620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 438 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-07 00:51:28,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-12-07 00:51:28,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 82. [2021-12-07 00:51:28,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 1.1358024691358024) internal successors, (92), 81 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) [2021-12-07 00:51:28,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 92 transitions. [2021-12-07 00:51:28,087 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 92 transitions. Word has length 49 [2021-12-07 00:51:28,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:51:28,088 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 92 transitions. [2021-12-07 00:51:28,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.176470588235294) internal successors, (71), 17 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:51:28,088 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 92 transitions. [2021-12-07 00:51:28,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-07 00:51:28,089 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:51:28,089 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:51:28,101 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-12-07 00:51:28,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 00:51:28,289 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:51:28,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:51:28,290 INFO L85 PathProgramCache]: Analyzing trace with hash -1725581382, now seen corresponding path program 4 times [2021-12-07 00:51:28,290 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 00:51:28,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [978542886] [2021-12-07 00:51:28,290 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-07 00:51:28,290 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 00:51:28,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 00:51:28,291 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 00:51:28,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-12-07 00:51:28,369 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-07 00:51:28,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:51:28,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-07 00:51:28,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:51:28,504 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-07 00:51:28,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:51:28,708 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-07 00:51:28,708 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 00:51:28,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [978542886] [2021-12-07 00:51:28,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [978542886] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:51:28,709 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 00:51:28,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-12-07 00:51:28,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591827716] [2021-12-07 00:51:28,709 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 00:51:28,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-07 00:51:28,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 00:51:28,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-07 00:51:28,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-12-07 00:51:28,710 INFO L87 Difference]: Start difference. First operand 82 states and 92 transitions. Second operand has 16 states, 16 states have (on average 3.1875) internal successors, (51), 16 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) [2021-12-07 00:51:28,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:51:28,984 INFO L93 Difference]: Finished difference Result 159 states and 179 transitions. [2021-12-07 00:51:28,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-07 00:51:28,985 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.1875) internal successors, (51), 16 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 49 [2021-12-07 00:51:28,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:51:28,985 INFO L225 Difference]: With dead ends: 159 [2021-12-07 00:51:28,985 INFO L226 Difference]: Without dead ends: 85 [2021-12-07 00:51:28,986 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2021-12-07 00:51:28,986 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 18 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-07 00:51:28,987 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 94 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-07 00:51:28,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-12-07 00:51:28,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 84. [2021-12-07 00:51:28,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.1325301204819278) internal successors, (94), 83 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:51:28,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 94 transitions. [2021-12-07 00:51:28,993 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 94 transitions. Word has length 49 [2021-12-07 00:51:28,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:51:28,993 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 94 transitions. [2021-12-07 00:51:28,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.1875) internal successors, (51), 16 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) [2021-12-07 00:51:28,994 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 94 transitions. [2021-12-07 00:51:28,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-07 00:51:28,994 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:51:28,994 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:51:29,003 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (10)] Ended with exit code 0 [2021-12-07 00:51:29,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 00:51:29,195 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:51:29,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:51:29,195 INFO L85 PathProgramCache]: Analyzing trace with hash -925733540, now seen corresponding path program 5 times [2021-12-07 00:51:29,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 00:51:29,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1621019334] [2021-12-07 00:51:29,196 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-07 00:51:29,196 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 00:51:29,196 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 00:51:29,197 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 00:51:29,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-12-07 00:51:29,393 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-12-07 00:51:29,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:51:29,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-07 00:51:29,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:51:29,528 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-07 00:51:29,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:51:29,722 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-07 00:51:29,722 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 00:51:29,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1621019334] [2021-12-07 00:51:29,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1621019334] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:51:29,722 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 00:51:29,722 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-12-07 00:51:29,723 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445524807] [2021-12-07 00:51:29,723 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 00:51:29,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-07 00:51:29,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 00:51:29,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-07 00:51:29,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-12-07 00:51:29,723 INFO L87 Difference]: Start difference. First operand 84 states and 94 transitions. Second operand has 15 states, 15 states have (on average 3.4) internal successors, (51), 15 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) [2021-12-07 00:51:30,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:51:30,104 INFO L93 Difference]: Finished difference Result 97 states and 107 transitions. [2021-12-07 00:51:30,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-07 00:51:30,105 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 15 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 51 [2021-12-07 00:51:30,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:51:30,105 INFO L225 Difference]: With dead ends: 97 [2021-12-07 00:51:30,105 INFO L226 Difference]: Without dead ends: 69 [2021-12-07 00:51:30,108 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2021-12-07 00:51:30,109 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 77 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 415 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-07 00:51:30,109 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 51 Invalid, 488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 415 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-07 00:51:30,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-12-07 00:51:30,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 62. [2021-12-07 00:51:30,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.1147540983606556) internal successors, (68), 61 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:51:30,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 68 transitions. [2021-12-07 00:51:30,116 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 68 transitions. Word has length 51 [2021-12-07 00:51:30,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:51:30,116 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 68 transitions. [2021-12-07 00:51:30,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 15 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) [2021-12-07 00:51:30,116 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 68 transitions. [2021-12-07 00:51:30,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-07 00:51:30,117 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:51:30,117 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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, 1] [2021-12-07 00:51:30,126 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-12-07 00:51:30,318 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 00:51:30,319 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:51:30,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:51:30,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1781065978, now seen corresponding path program 6 times [2021-12-07 00:51:30,322 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 00:51:30,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [210888392] [2021-12-07 00:51:30,322 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-07 00:51:30,323 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 00:51:30,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 00:51:30,325 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 00:51:30,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b52fd21e-d567-47c7-9329-ebd865bd0672/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process