./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops-crafted-1/mono-crafted_1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f8e1c903 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loops-crafted-1/mono-crafted_1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 00e8f12f1d0e3d2fc679744754ceeef2daa37b874cd8db07b5ab8c35684165c0 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-f8e1c90 [2021-11-09 10:44:27,967 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-09 10:44:27,970 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-09 10:44:28,019 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-09 10:44:28,020 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-09 10:44:28,021 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-09 10:44:28,023 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-09 10:44:28,025 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-09 10:44:28,027 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-09 10:44:28,028 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-09 10:44:28,029 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-09 10:44:28,031 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-09 10:44:28,031 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-09 10:44:28,032 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-09 10:44:28,034 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-09 10:44:28,036 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-09 10:44:28,037 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-09 10:44:28,038 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-09 10:44:28,041 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-09 10:44:28,043 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-09 10:44:28,045 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-09 10:44:28,047 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-09 10:44:28,049 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-09 10:44:28,050 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-09 10:44:28,054 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-09 10:44:28,054 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-09 10:44:28,055 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-09 10:44:28,056 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-09 10:44:28,056 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-09 10:44:28,058 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-09 10:44:28,058 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-09 10:44:28,059 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-09 10:44:28,060 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-09 10:44:28,061 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-09 10:44:28,062 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-09 10:44:28,063 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-09 10:44:28,064 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-09 10:44:28,064 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-09 10:44:28,065 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-09 10:44:28,066 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-09 10:44:28,066 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-09 10:44:28,067 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-09 10:44:28,092 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-09 10:44:28,092 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-09 10:44:28,093 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-09 10:44:28,093 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-09 10:44:28,094 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-09 10:44:28,094 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-09 10:44:28,095 INFO L138 SettingsManager]: * Use SBE=true [2021-11-09 10:44:28,095 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-09 10:44:28,095 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-09 10:44:28,095 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-09 10:44:28,096 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-09 10:44:28,096 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-09 10:44:28,096 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-09 10:44:28,097 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-09 10:44:28,097 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-09 10:44:28,097 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-09 10:44:28,097 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-09 10:44:28,098 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-09 10:44:28,098 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-09 10:44:28,098 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-09 10:44:28,098 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-09 10:44:28,099 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-09 10:44:28,099 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 10:44:28,099 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-09 10:44:28,099 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-09 10:44:28,100 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-09 10:44:28,100 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-09 10:44:28,100 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-09 10:44:28,101 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-09 10:44:28,101 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-09 10:44:28,101 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-09 10:44:28,101 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-09 10:44:28,102 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_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 00e8f12f1d0e3d2fc679744754ceeef2daa37b874cd8db07b5ab8c35684165c0 [2021-11-09 10:44:28,375 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-09 10:44:28,403 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-09 10:44:28,405 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-09 10:44:28,406 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-09 10:44:28,407 INFO L275 PluginConnector]: CDTParser initialized [2021-11-09 10:44:28,408 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/../../sv-benchmarks/c/loops-crafted-1/mono-crafted_1.c [2021-11-09 10:44:28,507 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/data/449cb0b7c/f30e6c0fe0924c3ab299f664003ce3ca/FLAG2e8a0a8d7 [2021-11-09 10:44:28,971 INFO L306 CDTParser]: Found 1 translation units. [2021-11-09 10:44:28,972 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/sv-benchmarks/c/loops-crafted-1/mono-crafted_1.c [2021-11-09 10:44:28,979 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/data/449cb0b7c/f30e6c0fe0924c3ab299f664003ce3ca/FLAG2e8a0a8d7 [2021-11-09 10:44:29,368 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/data/449cb0b7c/f30e6c0fe0924c3ab299f664003ce3ca [2021-11-09 10:44:29,370 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-09 10:44:29,371 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-09 10:44:29,383 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-09 10:44:29,383 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-09 10:44:29,386 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-09 10:44:29,387 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 10:44:29" (1/1) ... [2021-11-09 10:44:29,388 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5110f92e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:44:29, skipping insertion in model container [2021-11-09 10:44:29,389 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 10:44:29" (1/1) ... [2021-11-09 10:44:29,396 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-09 10:44:29,407 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-09 10:44:29,571 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/sv-benchmarks/c/loops-crafted-1/mono-crafted_1.c[318,331] [2021-11-09 10:44:29,590 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 10:44:29,597 INFO L203 MainTranslator]: Completed pre-run [2021-11-09 10:44:29,606 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/sv-benchmarks/c/loops-crafted-1/mono-crafted_1.c[318,331] [2021-11-09 10:44:29,610 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 10:44:29,623 INFO L208 MainTranslator]: Completed translation [2021-11-09 10:44:29,624 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:44:29 WrapperNode [2021-11-09 10:44:29,624 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-09 10:44:29,626 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-09 10:44:29,626 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-09 10:44:29,626 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-09 10:44:29,634 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:44:29" (1/1) ... [2021-11-09 10:44:29,641 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:44:29" (1/1) ... [2021-11-09 10:44:29,659 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-09 10:44:29,660 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-09 10:44:29,660 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-09 10:44:29,660 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-09 10:44:29,669 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:44:29" (1/1) ... [2021-11-09 10:44:29,669 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:44:29" (1/1) ... [2021-11-09 10:44:29,670 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:44:29" (1/1) ... [2021-11-09 10:44:29,671 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:44:29" (1/1) ... [2021-11-09 10:44:29,674 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:44:29" (1/1) ... [2021-11-09 10:44:29,678 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:44:29" (1/1) ... [2021-11-09 10:44:29,679 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:44:29" (1/1) ... [2021-11-09 10:44:29,681 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-09 10:44:29,682 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-09 10:44:29,682 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-09 10:44:29,682 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-09 10:44:29,683 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:44:29" (1/1) ... [2021-11-09 10:44:29,691 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 10:44:29,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:44:29,722 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-09 10:44:29,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-09 10:44:29,770 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-09 10:44:29,770 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-09 10:44:29,770 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-09 10:44:29,771 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-09 10:44:30,013 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-09 10:44:30,014 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-11-09 10:44:30,016 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 10:44:30 BoogieIcfgContainer [2021-11-09 10:44:30,016 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-09 10:44:30,018 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-09 10:44:30,018 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-09 10:44:30,021 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-09 10:44:30,022 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 10:44:29" (1/3) ... [2021-11-09 10:44:30,023 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50a9901b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 10:44:30, skipping insertion in model container [2021-11-09 10:44:30,023 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:44:29" (2/3) ... [2021-11-09 10:44:30,023 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50a9901b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 10:44:30, skipping insertion in model container [2021-11-09 10:44:30,024 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 10:44:30" (3/3) ... [2021-11-09 10:44:30,025 INFO L111 eAbstractionObserver]: Analyzing ICFG mono-crafted_1.c [2021-11-09 10:44:30,031 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-09 10:44:30,031 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-09 10:44:30,081 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-09 10:44:30,088 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-09 10:44:30,088 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-09 10:44:30,103 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:30,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-09 10:44:30,108 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:44:30,109 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:44:30,109 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:44:30,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:44:30,115 INFO L85 PathProgramCache]: Analyzing trace with hash 1818421976, now seen corresponding path program 1 times [2021-11-09 10:44:30,124 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:44:30,125 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184422497] [2021-11-09 10:44:30,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:44:30,126 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:44:30,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:44:30,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:44:30,256 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:44:30,257 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184422497] [2021-11-09 10:44:30,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184422497] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:44:30,258 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:44:30,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-09 10:44:30,260 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606322055] [2021-11-09 10:44:30,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-09 10:44:30,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:44:30,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-09 10:44:30,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-09 10:44:30,280 INFO L87 Difference]: Start difference. First operand has 13 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:30,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:44:30,293 INFO L93 Difference]: Finished difference Result 22 states and 29 transitions. [2021-11-09 10:44:30,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-09 10:44:30,295 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-09 10:44:30,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:44:30,302 INFO L225 Difference]: With dead ends: 22 [2021-11-09 10:44:30,302 INFO L226 Difference]: Without dead ends: 9 [2021-11-09 10:44:30,305 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-09 10:44:30,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-11-09 10:44:30,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-11-09 10:44:30,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.375) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:30,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 11 transitions. [2021-11-09 10:44:30,333 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 11 transitions. Word has length 7 [2021-11-09 10:44:30,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:44:30,333 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 11 transitions. [2021-11-09 10:44:30,334 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:30,334 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 11 transitions. [2021-11-09 10:44:30,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-09 10:44:30,334 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:44:30,334 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:44:30,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-09 10:44:30,335 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:44:30,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:44:30,336 INFO L85 PathProgramCache]: Analyzing trace with hash 1809186766, now seen corresponding path program 1 times [2021-11-09 10:44:30,336 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:44:30,336 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116103602] [2021-11-09 10:44:30,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:44:30,337 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:44:30,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:44:30,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:44:30,413 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:44:30,413 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116103602] [2021-11-09 10:44:30,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116103602] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:44:30,414 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:44:30,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 10:44:30,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366254073] [2021-11-09 10:44:30,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 10:44:30,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:44:30,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 10:44:30,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:44:30,418 INFO L87 Difference]: Start difference. First operand 9 states and 11 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:30,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:44:30,446 INFO L93 Difference]: Finished difference Result 18 states and 24 transitions. [2021-11-09 10:44:30,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 10:44:30,447 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-09 10:44:30,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:44:30,447 INFO L225 Difference]: With dead ends: 18 [2021-11-09 10:44:30,448 INFO L226 Difference]: Without dead ends: 11 [2021-11-09 10:44:30,448 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:44:30,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2021-11-09 10:44:30,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2021-11-09 10:44:30,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.3) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:30,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2021-11-09 10:44:30,464 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 7 [2021-11-09 10:44:30,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:44:30,464 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2021-11-09 10:44:30,464 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:30,464 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2021-11-09 10:44:30,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-09 10:44:30,465 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:44:30,465 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:44:30,465 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-09 10:44:30,466 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:44:30,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:44:30,466 INFO L85 PathProgramCache]: Analyzing trace with hash 576672011, now seen corresponding path program 1 times [2021-11-09 10:44:30,467 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:44:30,467 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086058956] [2021-11-09 10:44:30,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:44:30,467 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:44:30,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:44:30,520 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 10:44:30,520 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:44:30,521 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086058956] [2021-11-09 10:44:30,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086058956] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:44:30,521 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:44:30,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 10:44:30,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899946218] [2021-11-09 10:44:30,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 10:44:30,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:44:30,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 10:44:30,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:44:30,523 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:30,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:44:30,534 INFO L93 Difference]: Finished difference Result 16 states and 18 transitions. [2021-11-09 10:44:30,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 10:44:30,534 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2021-11-09 10:44:30,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:44:30,535 INFO L225 Difference]: With dead ends: 16 [2021-11-09 10:44:30,535 INFO L226 Difference]: Without dead ends: 12 [2021-11-09 10:44:30,536 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:44:30,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-11-09 10:44:30,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2021-11-09 10:44:30,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:30,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2021-11-09 10:44:30,539 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 9 [2021-11-09 10:44:30,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:44:30,540 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2021-11-09 10:44:30,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:30,540 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2021-11-09 10:44:30,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-09 10:44:30,541 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:44:30,541 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:44:30,541 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-09 10:44:30,542 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:44:30,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:44:30,542 INFO L85 PathProgramCache]: Analyzing trace with hash 698628545, now seen corresponding path program 1 times [2021-11-09 10:44:30,543 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:44:30,543 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424787766] [2021-11-09 10:44:30,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:44:30,543 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:44:30,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:44:30,586 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 10:44:30,586 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:44:30,586 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424787766] [2021-11-09 10:44:30,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424787766] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:44:30,587 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432324322] [2021-11-09 10:44:30,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:44:30,587 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:44:30,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:44:30,589 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:44:30,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-09 10:44:30,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:44:30,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-09 10:44:30,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:44:30,755 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 10:44:30,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432324322] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:44:30,756 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:44:30,756 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-11-09 10:44:30,756 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766980900] [2021-11-09 10:44:30,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 10:44:30,757 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:44:30,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 10:44:30,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:44:30,758 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:30,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:44:30,780 INFO L93 Difference]: Finished difference Result 22 states and 28 transitions. [2021-11-09 10:44:30,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 10:44:30,780 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 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 10 [2021-11-09 10:44:30,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:44:30,781 INFO L225 Difference]: With dead ends: 22 [2021-11-09 10:44:30,781 INFO L226 Difference]: Without dead ends: 14 [2021-11-09 10:44:30,781 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:44:30,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-11-09 10:44:30,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-11-09 10:44:30,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:30,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2021-11-09 10:44:30,785 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 10 [2021-11-09 10:44:30,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:44:30,785 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2021-11-09 10:44:30,785 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:30,786 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2021-11-09 10:44:30,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-09 10:44:30,786 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:44:30,786 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:44:30,845 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-09 10:44:31,006 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:44:31,007 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:44:31,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:44:31,007 INFO L85 PathProgramCache]: Analyzing trace with hash 526975844, now seen corresponding path program 2 times [2021-11-09 10:44:31,007 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:44:31,008 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207580203] [2021-11-09 10:44:31,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:44:31,008 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:44:31,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:44:31,045 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-09 10:44:31,045 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:44:31,045 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207580203] [2021-11-09 10:44:31,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207580203] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:44:31,046 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:44:31,046 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 10:44:31,046 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600928700] [2021-11-09 10:44:31,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 10:44:31,047 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:44:31,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 10:44:31,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:44:31,048 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:31,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:44:31,062 INFO L93 Difference]: Finished difference Result 22 states and 26 transitions. [2021-11-09 10:44:31,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 10:44:31,063 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-09 10:44:31,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:44:31,064 INFO L225 Difference]: With dead ends: 22 [2021-11-09 10:44:31,064 INFO L226 Difference]: Without dead ends: 16 [2021-11-09 10:44:31,064 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:44:31,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-11-09 10:44:31,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2021-11-09 10:44:31,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:31,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2021-11-09 10:44:31,068 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 12 [2021-11-09 10:44:31,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:44:31,069 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2021-11-09 10:44:31,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:31,069 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2021-11-09 10:44:31,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-09 10:44:31,069 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:44:31,070 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:44:31,070 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-09 10:44:31,070 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:44:31,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:44:31,071 INFO L85 PathProgramCache]: Analyzing trace with hash 552494793, now seen corresponding path program 1 times [2021-11-09 10:44:31,071 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:44:31,071 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295550154] [2021-11-09 10:44:31,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:44:31,072 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:44:31,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:44:31,175 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 10:44:31,176 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:44:31,176 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295550154] [2021-11-09 10:44:31,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295550154] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:44:31,176 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609052692] [2021-11-09 10:44:31,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:44:31,177 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:44:31,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:44:31,182 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:44:31,197 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-09 10:44:31,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:44:31,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-09 10:44:31,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:44:31,352 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 10:44:31,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609052692] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:44:31,352 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:44:31,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-11-09 10:44:31,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667968933] [2021-11-09 10:44:31,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 10:44:31,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:44:31,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 10:44:31,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-09 10:44:31,355 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:31,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:44:31,396 INFO L93 Difference]: Finished difference Result 26 states and 31 transitions. [2021-11-09 10:44:31,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-09 10:44:31,401 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 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 14 [2021-11-09 10:44:31,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:44:31,402 INFO L225 Difference]: With dead ends: 26 [2021-11-09 10:44:31,402 INFO L226 Difference]: Without dead ends: 17 [2021-11-09 10:44:31,402 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-09 10:44:31,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-11-09 10:44:31,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-11-09 10:44:31,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:31,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-11-09 10:44:31,407 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 14 [2021-11-09 10:44:31,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:44:31,407 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-11-09 10:44:31,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:31,407 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-11-09 10:44:31,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-09 10:44:31,408 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:44:31,408 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:44:31,448 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-09 10:44:31,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:44:31,636 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:44:31,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:44:31,637 INFO L85 PathProgramCache]: Analyzing trace with hash -1373657364, now seen corresponding path program 2 times [2021-11-09 10:44:31,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:44:31,637 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530645831] [2021-11-09 10:44:31,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:44:31,637 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:44:31,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:44:31,745 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 10:44:31,746 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:44:31,746 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530645831] [2021-11-09 10:44:31,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530645831] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:44:31,746 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356835299] [2021-11-09 10:44:31,747 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 10:44:31,747 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:44:31,747 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:44:31,752 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:44:31,761 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-09 10:44:31,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 10:44:31,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:44:31,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-09 10:44:31,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:44:31,874 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 10:44:31,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1356835299] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:44:31,874 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:44:31,874 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-11-09 10:44:31,875 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341577154] [2021-11-09 10:44:31,875 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-09 10:44:31,875 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:44:31,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-09 10:44:31,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-09 10:44:31,876 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:31,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:44:31,919 INFO L93 Difference]: Finished difference Result 28 states and 33 transitions. [2021-11-09 10:44:31,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 10:44:31,920 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 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 16 [2021-11-09 10:44:31,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:44:31,920 INFO L225 Difference]: With dead ends: 28 [2021-11-09 10:44:31,921 INFO L226 Difference]: Without dead ends: 19 [2021-11-09 10:44:31,921 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-09 10:44:31,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-11-09 10:44:31,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-11-09 10:44:31,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 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) [2021-11-09 10:44:31,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2021-11-09 10:44:31,926 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 16 [2021-11-09 10:44:31,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:44:31,926 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2021-11-09 10:44:31,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:31,927 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2021-11-09 10:44:31,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-09 10:44:31,927 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:44:31,927 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:44:31,950 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-11-09 10:44:32,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:44:32,148 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:44:32,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:44:32,149 INFO L85 PathProgramCache]: Analyzing trace with hash -1274975665, now seen corresponding path program 3 times [2021-11-09 10:44:32,149 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:44:32,149 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107171618] [2021-11-09 10:44:32,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:44:32,149 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:44:32,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:44:32,242 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 10:44:32,243 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:44:32,243 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107171618] [2021-11-09 10:44:32,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107171618] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:44:32,247 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806481204] [2021-11-09 10:44:32,247 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 10:44:32,247 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:44:32,248 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:44:32,252 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:44:32,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-09 10:44:32,315 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-09 10:44:32,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:44:32,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-09 10:44:32,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:44:32,527 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-09 10:44:32,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806481204] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:44:32,530 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:44:32,533 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 9 [2021-11-09 10:44:32,534 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422635247] [2021-11-09 10:44:32,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-09 10:44:32,537 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:44:32,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-09 10:44:32,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-09 10:44:32,541 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:32,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:44:32,633 INFO L93 Difference]: Finished difference Result 33 states and 40 transitions. [2021-11-09 10:44:32,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-09 10:44:32,636 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-09 10:44:32,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:44:32,636 INFO L225 Difference]: With dead ends: 33 [2021-11-09 10:44:32,637 INFO L226 Difference]: Without dead ends: 24 [2021-11-09 10:44:32,637 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-11-09 10:44:32,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-11-09 10:44:32,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2021-11-09 10:44:32,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:32,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2021-11-09 10:44:32,642 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 18 [2021-11-09 10:44:32,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:44:32,642 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2021-11-09 10:44:32,642 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:32,643 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2021-11-09 10:44:32,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-09 10:44:32,645 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:44:32,646 INFO L513 BasicCegarLoop]: trace histogram [6, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:44:32,674 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-09 10:44:32,860 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:44:32,860 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:44:32,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:44:32,861 INFO L85 PathProgramCache]: Analyzing trace with hash 1200989882, now seen corresponding path program 4 times [2021-11-09 10:44:32,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:44:32,861 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104651841] [2021-11-09 10:44:32,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:44:32,861 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:44:32,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:44:32,971 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-09 10:44:32,972 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:44:32,972 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104651841] [2021-11-09 10:44:32,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104651841] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:44:32,972 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121325085] [2021-11-09 10:44:32,972 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 10:44:32,973 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:44:32,973 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:44:32,980 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:44:32,985 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-09 10:44:33,047 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 10:44:33,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:44:33,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-09 10:44:33,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:44:33,123 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-09 10:44:33,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121325085] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:44:33,123 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:44:33,124 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-11-09 10:44:33,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753420729] [2021-11-09 10:44:33,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-09 10:44:33,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:44:33,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-09 10:44:33,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-11-09 10:44:33,129 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 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) [2021-11-09 10:44:33,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:44:33,160 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2021-11-09 10:44:33,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-09 10:44:33,161 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 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 21 [2021-11-09 10:44:33,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:44:33,161 INFO L225 Difference]: With dead ends: 34 [2021-11-09 10:44:33,162 INFO L226 Difference]: Without dead ends: 24 [2021-11-09 10:44:33,162 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-11-09 10:44:33,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-11-09 10:44:33,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-11-09 10:44:33,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:33,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2021-11-09 10:44:33,166 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 21 [2021-11-09 10:44:33,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:44:33,167 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2021-11-09 10:44:33,167 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 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) [2021-11-09 10:44:33,167 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2021-11-09 10:44:33,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-09 10:44:33,168 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:44:33,168 INFO L513 BasicCegarLoop]: trace histogram [7, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:44:33,198 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-09 10:44:33,384 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-11-09 10:44:33,384 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:44:33,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:44:33,385 INFO L85 PathProgramCache]: Analyzing trace with hash 809863479, now seen corresponding path program 5 times [2021-11-09 10:44:33,385 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:44:33,385 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724531256] [2021-11-09 10:44:33,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:44:33,385 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:44:33,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:44:33,465 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-09 10:44:33,466 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:44:33,466 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724531256] [2021-11-09 10:44:33,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724531256] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:44:33,466 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041960171] [2021-11-09 10:44:33,466 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 10:44:33,466 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:44:33,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:44:33,472 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:44:33,491 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-09 10:44:33,548 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-11-09 10:44:33,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:44:33,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-09 10:44:33,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:44:33,646 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-09 10:44:33,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041960171] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:44:33,647 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:44:33,647 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-11-09 10:44:33,647 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751934715] [2021-11-09 10:44:33,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-09 10:44:33,648 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:44:33,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-09 10:44:33,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-11-09 10:44:33,649 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:33,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:44:33,696 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2021-11-09 10:44:33,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-09 10:44:33,697 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-11-09 10:44:33,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:44:33,698 INFO L225 Difference]: With dead ends: 36 [2021-11-09 10:44:33,698 INFO L226 Difference]: Without dead ends: 26 [2021-11-09 10:44:33,698 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-11-09 10:44:33,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-11-09 10:44:33,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-11-09 10:44:33,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.12) internal successors, (28), 25 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:33,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2021-11-09 10:44:33,708 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 23 [2021-11-09 10:44:33,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:44:33,708 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2021-11-09 10:44:33,708 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:33,709 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2021-11-09 10:44:33,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-09 10:44:33,716 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:44:33,716 INFO L513 BasicCegarLoop]: trace histogram [8, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:44:33,739 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-09 10:44:33,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:44:33,924 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:44:33,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:44:33,925 INFO L85 PathProgramCache]: Analyzing trace with hash -1400455052, now seen corresponding path program 6 times [2021-11-09 10:44:33,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:44:33,925 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878043823] [2021-11-09 10:44:33,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:44:33,925 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:44:33,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:44:34,040 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-09 10:44:34,040 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:44:34,040 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878043823] [2021-11-09 10:44:34,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878043823] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:44:34,041 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503917710] [2021-11-09 10:44:34,041 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 10:44:34,041 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:44:34,041 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:44:34,042 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:44:34,064 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-09 10:44:34,129 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-11-09 10:44:34,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:44:34,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-09 10:44:34,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:44:34,337 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-09 10:44:34,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1503917710] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:44:34,338 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:44:34,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5] total 13 [2021-11-09 10:44:34,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368848688] [2021-11-09 10:44:34,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-09 10:44:34,339 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:44:34,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-09 10:44:34,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-09 10:44:34,340 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:34,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:44:34,500 INFO L93 Difference]: Finished difference Result 41 states and 48 transitions. [2021-11-09 10:44:34,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-09 10:44:34,501 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-11-09 10:44:34,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:44:34,504 INFO L225 Difference]: With dead ends: 41 [2021-11-09 10:44:34,504 INFO L226 Difference]: Without dead ends: 31 [2021-11-09 10:44:34,504 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=150, Invalid=270, Unknown=0, NotChecked=0, Total=420 [2021-11-09 10:44:34,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-11-09 10:44:34,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2021-11-09 10:44:34,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 28 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:34,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2021-11-09 10:44:34,521 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 25 [2021-11-09 10:44:34,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:44:34,523 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2021-11-09 10:44:34,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:34,524 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2021-11-09 10:44:34,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-09 10:44:34,524 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:44:34,525 INFO L513 BasicCegarLoop]: trace histogram [9, 8, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:44:34,562 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-09 10:44:34,740 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:44:34,740 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:44:34,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:44:34,740 INFO L85 PathProgramCache]: Analyzing trace with hash -1918510309, now seen corresponding path program 7 times [2021-11-09 10:44:34,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:44:34,741 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350190348] [2021-11-09 10:44:34,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:44:34,741 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:44:34,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:44:34,863 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-09 10:44:34,863 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:44:34,863 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350190348] [2021-11-09 10:44:34,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350190348] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:44:34,864 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449817359] [2021-11-09 10:44:34,864 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 10:44:34,864 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:44:34,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:44:34,865 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:44:34,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-09 10:44:34,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:44:34,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-09 10:44:34,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:44:35,058 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-09 10:44:35,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449817359] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:44:35,058 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:44:35,058 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-11-09 10:44:35,058 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116599797] [2021-11-09 10:44:35,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-09 10:44:35,059 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:44:35,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-09 10:44:35,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-11-09 10:44:35,060 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:35,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:44:35,105 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2021-11-09 10:44:35,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-09 10:44:35,105 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-11-09 10:44:35,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:44:35,106 INFO L225 Difference]: With dead ends: 42 [2021-11-09 10:44:35,106 INFO L226 Difference]: Without dead ends: 31 [2021-11-09 10:44:35,107 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-11-09 10:44:35,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-11-09 10:44:35,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-11-09 10:44:35,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.1) internal successors, (33), 30 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:35,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2021-11-09 10:44:35,111 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 28 [2021-11-09 10:44:35,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:44:35,112 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2021-11-09 10:44:35,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:35,112 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2021-11-09 10:44:35,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-09 10:44:35,113 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:44:35,113 INFO L513 BasicCegarLoop]: trace histogram [10, 9, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:44:35,144 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-09 10:44:35,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-09 10:44:35,339 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:44:35,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:44:35,339 INFO L85 PathProgramCache]: Analyzing trace with hash -727277058, now seen corresponding path program 8 times [2021-11-09 10:44:35,339 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:44:35,340 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210020428] [2021-11-09 10:44:35,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:44:35,340 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:44:35,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:44:35,456 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-09 10:44:35,456 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:44:35,457 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210020428] [2021-11-09 10:44:35,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210020428] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:44:35,457 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127720493] [2021-11-09 10:44:35,457 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 10:44:35,457 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:44:35,457 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:44:35,460 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:44:35,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-09 10:44:35,569 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 10:44:35,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:44:35,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-09 10:44:35,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:44:35,683 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-09 10:44:35,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127720493] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:44:35,683 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:44:35,684 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-11-09 10:44:35,684 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214921720] [2021-11-09 10:44:35,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-09 10:44:35,684 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:44:35,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-09 10:44:35,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-11-09 10:44:35,686 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:35,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:44:35,722 INFO L93 Difference]: Finished difference Result 44 states and 49 transitions. [2021-11-09 10:44:35,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-09 10:44:35,723 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-11-09 10:44:35,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:44:35,724 INFO L225 Difference]: With dead ends: 44 [2021-11-09 10:44:35,724 INFO L226 Difference]: Without dead ends: 33 [2021-11-09 10:44:35,725 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-11-09 10:44:35,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-11-09 10:44:35,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-11-09 10:44:35,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.09375) internal successors, (35), 32 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:35,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2021-11-09 10:44:35,740 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 30 [2021-11-09 10:44:35,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:44:35,740 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2021-11-09 10:44:35,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:35,740 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2021-11-09 10:44:35,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-09 10:44:35,741 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:44:35,741 INFO L513 BasicCegarLoop]: trace histogram [11, 10, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:44:35,764 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-09 10:44:35,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-09 10:44:35,948 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:44:35,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:44:35,948 INFO L85 PathProgramCache]: Analyzing trace with hash 1586576417, now seen corresponding path program 9 times [2021-11-09 10:44:35,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:44:35,949 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945657277] [2021-11-09 10:44:35,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:44:35,949 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:44:35,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:44:36,084 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 11 proven. 110 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-09 10:44:36,085 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:44:36,085 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945657277] [2021-11-09 10:44:36,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945657277] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:44:36,085 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506714482] [2021-11-09 10:44:36,085 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 10:44:36,085 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:44:36,085 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:44:36,086 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:44:36,110 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-09 10:44:36,207 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-09 10:44:36,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:44:36,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-09 10:44:36,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:44:36,496 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2021-11-09 10:44:36,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506714482] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:44:36,496 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:44:36,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 6] total 17 [2021-11-09 10:44:36,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071120964] [2021-11-09 10:44:36,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-09 10:44:36,497 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:44:36,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-09 10:44:36,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2021-11-09 10:44:36,498 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:36,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:44:36,703 INFO L93 Difference]: Finished difference Result 49 states and 56 transitions. [2021-11-09 10:44:36,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-09 10:44:36,703 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-11-09 10:44:36,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:44:36,704 INFO L225 Difference]: With dead ends: 49 [2021-11-09 10:44:36,704 INFO L226 Difference]: Without dead ends: 38 [2021-11-09 10:44:36,705 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=268, Invalid=488, Unknown=0, NotChecked=0, Total=756 [2021-11-09 10:44:36,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-11-09 10:44:36,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2021-11-09 10:44:36,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.0857142857142856) internal successors, (38), 35 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:36,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2021-11-09 10:44:36,709 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 32 [2021-11-09 10:44:36,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:44:36,709 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2021-11-09 10:44:36,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:36,710 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2021-11-09 10:44:36,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-09 10:44:36,711 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:44:36,711 INFO L513 BasicCegarLoop]: trace histogram [12, 11, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:44:36,744 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-09 10:44:36,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-09 10:44:36,920 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:44:36,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:44:36,920 INFO L85 PathProgramCache]: Analyzing trace with hash -275333016, now seen corresponding path program 10 times [2021-11-09 10:44:36,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:44:36,920 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332344152] [2021-11-09 10:44:36,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:44:36,921 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:44:36,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:44:37,048 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 12 proven. 132 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-09 10:44:37,049 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:44:37,049 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332344152] [2021-11-09 10:44:37,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332344152] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:44:37,049 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034590054] [2021-11-09 10:44:37,050 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 10:44:37,050 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:44:37,050 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:44:37,051 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:44:37,060 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-09 10:44:37,198 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 10:44:37,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:44:37,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-09 10:44:37,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:44:37,329 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 12 proven. 132 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-09 10:44:37,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034590054] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:44:37,330 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:44:37,330 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-11-09 10:44:37,330 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45120543] [2021-11-09 10:44:37,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-09 10:44:37,331 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:44:37,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-09 10:44:37,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-11-09 10:44:37,332 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:37,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:44:37,377 INFO L93 Difference]: Finished difference Result 50 states and 55 transitions. [2021-11-09 10:44:37,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-09 10:44:37,377 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-11-09 10:44:37,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:44:37,378 INFO L225 Difference]: With dead ends: 50 [2021-11-09 10:44:37,378 INFO L226 Difference]: Without dead ends: 38 [2021-11-09 10:44:37,381 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-11-09 10:44:37,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-11-09 10:44:37,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-11-09 10:44:37,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.0810810810810811) internal successors, (40), 37 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) [2021-11-09 10:44:37,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2021-11-09 10:44:37,389 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 35 [2021-11-09 10:44:37,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:44:37,389 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2021-11-09 10:44:37,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:37,390 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2021-11-09 10:44:37,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-09 10:44:37,390 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:44:37,391 INFO L513 BasicCegarLoop]: trace histogram [13, 12, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:44:37,415 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-09 10:44:37,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-09 10:44:37,600 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:44:37,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:44:37,600 INFO L85 PathProgramCache]: Analyzing trace with hash 234226725, now seen corresponding path program 11 times [2021-11-09 10:44:37,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:44:37,600 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911280530] [2021-11-09 10:44:37,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:44:37,601 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:44:37,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:44:37,740 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 13 proven. 156 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-09 10:44:37,740 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:44:37,741 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911280530] [2021-11-09 10:44:37,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911280530] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:44:37,741 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217043069] [2021-11-09 10:44:37,741 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 10:44:37,741 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:44:37,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:44:37,742 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:44:37,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-09 10:44:37,882 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-11-09 10:44:37,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:44:37,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-09 10:44:37,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:44:38,019 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 13 proven. 156 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-09 10:44:38,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217043069] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:44:38,020 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:44:38,020 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-11-09 10:44:38,020 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227851276] [2021-11-09 10:44:38,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-09 10:44:38,020 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:44:38,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-09 10:44:38,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-11-09 10:44:38,022 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:38,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:44:38,080 INFO L93 Difference]: Finished difference Result 52 states and 57 transitions. [2021-11-09 10:44:38,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-09 10:44:38,081 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-11-09 10:44:38,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:44:38,082 INFO L225 Difference]: With dead ends: 52 [2021-11-09 10:44:38,082 INFO L226 Difference]: Without dead ends: 40 [2021-11-09 10:44:38,082 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-11-09 10:44:38,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-11-09 10:44:38,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-11-09 10:44:38,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.0769230769230769) internal successors, (42), 39 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:38,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2021-11-09 10:44:38,093 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 37 [2021-11-09 10:44:38,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:44:38,093 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2021-11-09 10:44:38,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:38,093 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2021-11-09 10:44:38,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-09 10:44:38,096 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:44:38,097 INFO L513 BasicCegarLoop]: trace histogram [14, 13, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:44:38,140 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-09 10:44:38,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:44:38,312 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:44:38,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:44:38,312 INFO L85 PathProgramCache]: Analyzing trace with hash 294866082, now seen corresponding path program 12 times [2021-11-09 10:44:38,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:44:38,312 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340747555] [2021-11-09 10:44:38,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:44:38,313 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:44:38,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:44:38,472 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 14 proven. 182 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-09 10:44:38,473 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:44:38,474 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340747555] [2021-11-09 10:44:38,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340747555] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:44:38,474 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757694453] [2021-11-09 10:44:38,474 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 10:44:38,474 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:44:38,475 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:44:38,475 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:44:38,492 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-09 10:44:38,622 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-11-09 10:44:38,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:44:38,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-09 10:44:38,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:44:38,927 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 14 proven. 10 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2021-11-09 10:44:38,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757694453] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:44:38,927 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:44:38,927 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 7] total 21 [2021-11-09 10:44:38,927 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081177549] [2021-11-09 10:44:38,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-09 10:44:38,928 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:44:38,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-09 10:44:38,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=280, Unknown=0, NotChecked=0, Total=420 [2021-11-09 10:44:38,929 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:39,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:44:39,178 INFO L93 Difference]: Finished difference Result 57 states and 64 transitions. [2021-11-09 10:44:39,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-09 10:44:39,179 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-11-09 10:44:39,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:44:39,179 INFO L225 Difference]: With dead ends: 57 [2021-11-09 10:44:39,179 INFO L226 Difference]: Without dead ends: 45 [2021-11-09 10:44:39,180 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=420, Invalid=770, Unknown=0, NotChecked=0, Total=1190 [2021-11-09 10:44:39,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-11-09 10:44:39,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 43. [2021-11-09 10:44:39,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.0714285714285714) internal successors, (45), 42 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) [2021-11-09 10:44:39,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2021-11-09 10:44:39,185 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 39 [2021-11-09 10:44:39,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:44:39,185 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2021-11-09 10:44:39,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:39,186 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2021-11-09 10:44:39,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-09 10:44:39,186 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:44:39,187 INFO L513 BasicCegarLoop]: trace histogram [15, 14, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:44:39,229 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-09 10:44:39,412 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-09 10:44:39,412 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:44:39,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:44:39,412 INFO L85 PathProgramCache]: Analyzing trace with hash -1121567891, now seen corresponding path program 13 times [2021-11-09 10:44:39,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:44:39,412 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826212648] [2021-11-09 10:44:39,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:44:39,413 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:44:39,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:44:39,568 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 15 proven. 210 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-09 10:44:39,568 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:44:39,568 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826212648] [2021-11-09 10:44:39,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826212648] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:44:39,568 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231103349] [2021-11-09 10:44:39,569 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 10:44:39,569 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:44:39,569 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:44:39,570 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:44:39,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-09 10:44:39,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:44:39,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-09 10:44:39,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:44:39,876 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 15 proven. 210 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-09 10:44:39,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231103349] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:44:39,877 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:44:39,877 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-11-09 10:44:39,877 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532806557] [2021-11-09 10:44:39,877 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-09 10:44:39,878 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:44:39,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-09 10:44:39,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-11-09 10:44:39,883 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:39,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:44:39,942 INFO L93 Difference]: Finished difference Result 58 states and 63 transitions. [2021-11-09 10:44:39,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-09 10:44:39,943 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-11-09 10:44:39,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:44:39,944 INFO L225 Difference]: With dead ends: 58 [2021-11-09 10:44:39,944 INFO L226 Difference]: Without dead ends: 45 [2021-11-09 10:44:39,945 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-11-09 10:44:39,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-11-09 10:44:39,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-11-09 10:44:39,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.0681818181818181) internal successors, (47), 44 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:39,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2021-11-09 10:44:39,953 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 42 [2021-11-09 10:44:39,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:44:39,955 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2021-11-09 10:44:39,955 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:39,955 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2021-11-09 10:44:39,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-09 10:44:39,956 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:44:39,956 INFO L513 BasicCegarLoop]: trace histogram [16, 15, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:44:39,998 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-09 10:44:40,180 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-09 10:44:40,180 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:44:40,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:44:40,180 INFO L85 PathProgramCache]: Analyzing trace with hash 635681040, now seen corresponding path program 14 times [2021-11-09 10:44:40,181 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:44:40,181 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610388317] [2021-11-09 10:44:40,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:44:40,181 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:44:40,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:44:40,394 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 16 proven. 240 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-09 10:44:40,394 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:44:40,394 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610388317] [2021-11-09 10:44:40,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610388317] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:44:40,394 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962969242] [2021-11-09 10:44:40,394 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 10:44:40,394 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:44:40,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:44:40,395 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:44:40,400 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-09 10:44:40,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 10:44:40,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:44:40,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-09 10:44:40,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:44:40,742 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 16 proven. 240 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-09 10:44:40,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962969242] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:44:40,743 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:44:40,743 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-11-09 10:44:40,743 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956700403] [2021-11-09 10:44:40,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-09 10:44:40,744 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:44:40,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-09 10:44:40,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-11-09 10:44:40,745 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:40,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:44:40,800 INFO L93 Difference]: Finished difference Result 60 states and 65 transitions. [2021-11-09 10:44:40,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-09 10:44:40,801 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-11-09 10:44:40,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:44:40,802 INFO L225 Difference]: With dead ends: 60 [2021-11-09 10:44:40,802 INFO L226 Difference]: Without dead ends: 47 [2021-11-09 10:44:40,802 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-11-09 10:44:40,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-11-09 10:44:40,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-11-09 10:44:40,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.065217391304348) internal successors, (49), 46 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) [2021-11-09 10:44:40,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2021-11-09 10:44:40,807 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 44 [2021-11-09 10:44:40,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:44:40,808 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2021-11-09 10:44:40,808 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:40,808 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2021-11-09 10:44:40,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-09 10:44:40,809 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:44:40,809 INFO L513 BasicCegarLoop]: trace histogram [17, 16, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:44:40,844 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-09 10:44:41,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:44:41,032 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:44:41,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:44:41,032 INFO L85 PathProgramCache]: Analyzing trace with hash 1429756403, now seen corresponding path program 15 times [2021-11-09 10:44:41,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:44:41,033 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978364983] [2021-11-09 10:44:41,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:44:41,033 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:44:41,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:44:41,233 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 17 proven. 272 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-09 10:44:41,234 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:44:41,234 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978364983] [2021-11-09 10:44:41,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978364983] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:44:41,234 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11088818] [2021-11-09 10:44:41,234 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 10:44:41,234 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:44:41,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:44:41,240 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:44:41,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-09 10:44:41,451 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-09 10:44:41,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:44:41,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-09 10:44:41,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:44:41,588 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 48 proven. 1 refuted. 0 times theorem prover too weak. 255 trivial. 0 not checked. [2021-11-09 10:44:41,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [11088818] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:44:41,588 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:44:41,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 4] total 21 [2021-11-09 10:44:41,588 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344057442] [2021-11-09 10:44:41,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-09 10:44:41,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:44:41,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-09 10:44:41,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-11-09 10:44:41,590 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 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) [2021-11-09 10:44:41,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:44:41,650 INFO L93 Difference]: Finished difference Result 65 states and 73 transitions. [2021-11-09 10:44:41,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-09 10:44:41,651 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 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) Word has length 46 [2021-11-09 10:44:41,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:44:41,653 INFO L225 Difference]: With dead ends: 65 [2021-11-09 10:44:41,653 INFO L226 Difference]: Without dead ends: 52 [2021-11-09 10:44:41,654 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-11-09 10:44:41,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-11-09 10:44:41,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2021-11-09 10:44:41,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.08) internal successors, (54), 50 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:41,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 54 transitions. [2021-11-09 10:44:41,660 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 54 transitions. Word has length 46 [2021-11-09 10:44:41,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:44:41,660 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 54 transitions. [2021-11-09 10:44:41,660 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 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) [2021-11-09 10:44:41,660 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 54 transitions. [2021-11-09 10:44:41,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-09 10:44:41,661 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:44:41,661 INFO L513 BasicCegarLoop]: trace histogram [19, 17, 5, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:44:41,701 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-09 10:44:41,880 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:44:41,880 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:44:41,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:44:41,880 INFO L85 PathProgramCache]: Analyzing trace with hash 527553147, now seen corresponding path program 16 times [2021-11-09 10:44:41,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:44:41,881 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609098034] [2021-11-09 10:44:41,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:44:41,881 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:44:41,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:44:42,070 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 54 proven. 306 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-09 10:44:42,070 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:44:42,070 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609098034] [2021-11-09 10:44:42,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609098034] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:44:42,071 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591565757] [2021-11-09 10:44:42,071 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 10:44:42,071 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:44:42,071 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:44:42,074 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:44:42,075 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-09 10:44:42,268 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 10:44:42,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:44:42,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-09 10:44:42,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:44:42,430 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 54 proven. 306 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-09 10:44:42,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591565757] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:44:42,431 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:44:42,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-11-09 10:44:42,431 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550388320] [2021-11-09 10:44:42,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-09 10:44:42,432 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:44:42,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-09 10:44:42,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-11-09 10:44:42,433 INFO L87 Difference]: Start difference. First operand 51 states and 54 transitions. Second operand has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 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) [2021-11-09 10:44:42,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:44:42,491 INFO L93 Difference]: Finished difference Result 68 states and 75 transitions. [2021-11-09 10:44:42,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-09 10:44:42,492 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 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) Word has length 50 [2021-11-09 10:44:42,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:44:42,492 INFO L225 Difference]: With dead ends: 68 [2021-11-09 10:44:42,493 INFO L226 Difference]: Without dead ends: 53 [2021-11-09 10:44:42,493 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-11-09 10:44:42,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-11-09 10:44:42,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2021-11-09 10:44:42,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.0769230769230769) internal successors, (56), 52 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:42,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 56 transitions. [2021-11-09 10:44:42,498 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 56 transitions. Word has length 50 [2021-11-09 10:44:42,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:44:42,499 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 56 transitions. [2021-11-09 10:44:42,499 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 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) [2021-11-09 10:44:42,499 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 56 transitions. [2021-11-09 10:44:42,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-09 10:44:42,500 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:44:42,500 INFO L513 BasicCegarLoop]: trace histogram [20, 18, 5, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:44:42,534 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-09 10:44:42,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-11-09 10:44:42,715 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:44:42,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:44:42,716 INFO L85 PathProgramCache]: Analyzing trace with hash 1291123998, now seen corresponding path program 17 times [2021-11-09 10:44:42,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:44:42,716 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334751470] [2021-11-09 10:44:42,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:44:42,716 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:44:42,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:44:42,943 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 57 proven. 342 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-09 10:44:42,943 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:44:42,943 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334751470] [2021-11-09 10:44:42,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334751470] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:44:42,943 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515735274] [2021-11-09 10:44:42,943 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 10:44:42,943 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:44:42,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:44:42,944 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:44:42,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-09 10:44:43,166 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2021-11-09 10:44:43,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:44:43,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-09 10:44:43,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:44:43,350 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 57 proven. 342 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-09 10:44:43,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515735274] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:44:43,350 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:44:43,351 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-11-09 10:44:43,351 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186325249] [2021-11-09 10:44:43,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-09 10:44:43,352 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:44:43,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-09 10:44:43,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-11-09 10:44:43,353 INFO L87 Difference]: Start difference. First operand 53 states and 56 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:43,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:44:43,429 INFO L93 Difference]: Finished difference Result 70 states and 77 transitions. [2021-11-09 10:44:43,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-09 10:44:43,429 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-11-09 10:44:43,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:44:43,430 INFO L225 Difference]: With dead ends: 70 [2021-11-09 10:44:43,430 INFO L226 Difference]: Without dead ends: 55 [2021-11-09 10:44:43,432 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-11-09 10:44:43,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-11-09 10:44:43,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2021-11-09 10:44:43,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 54 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:43,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 58 transitions. [2021-11-09 10:44:43,445 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 58 transitions. Word has length 52 [2021-11-09 10:44:43,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:44:43,445 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 58 transitions. [2021-11-09 10:44:43,445 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:43,446 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 58 transitions. [2021-11-09 10:44:43,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-09 10:44:43,446 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:44:43,446 INFO L513 BasicCegarLoop]: trace histogram [21, 19, 5, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:44:43,486 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-09 10:44:43,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:44:43,672 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:44:43,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:44:43,672 INFO L85 PathProgramCache]: Analyzing trace with hash 643304193, now seen corresponding path program 18 times [2021-11-09 10:44:43,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:44:43,672 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947325620] [2021-11-09 10:44:43,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:44:43,673 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:44:43,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:44:43,902 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 60 proven. 380 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-09 10:44:43,902 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:44:43,902 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947325620] [2021-11-09 10:44:43,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947325620] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:44:43,902 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563150856] [2021-11-09 10:44:43,902 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 10:44:43,903 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:44:43,903 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:44:43,904 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:44:43,906 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-09 10:44:44,153 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-11-09 10:44:44,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:44:44,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-09 10:44:44,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:44:44,556 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 61 proven. 15 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2021-11-09 10:44:44,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563150856] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:44:44,556 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:44:44,556 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 8] total 28 [2021-11-09 10:44:44,556 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765831990] [2021-11-09 10:44:44,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-09 10:44:44,557 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:44:44,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-09 10:44:44,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=498, Unknown=0, NotChecked=0, Total=756 [2021-11-09 10:44:44,558 INFO L87 Difference]: Start difference. First operand 55 states and 58 transitions. Second operand has 28 states, 28 states have (on average 2.25) internal successors, (63), 28 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) [2021-11-09 10:44:44,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:44:44,921 INFO L93 Difference]: Finished difference Result 79 states and 90 transitions. [2021-11-09 10:44:44,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-09 10:44:44,921 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.25) internal successors, (63), 28 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 54 [2021-11-09 10:44:44,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:44:44,922 INFO L225 Difference]: With dead ends: 79 [2021-11-09 10:44:44,922 INFO L226 Difference]: Without dead ends: 64 [2021-11-09 10:44:44,924 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=778, Invalid=1478, Unknown=0, NotChecked=0, Total=2256 [2021-11-09 10:44:44,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-11-09 10:44:44,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 58. [2021-11-09 10:44:44,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.0701754385964912) internal successors, (61), 57 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:44,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 61 transitions. [2021-11-09 10:44:44,928 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 61 transitions. Word has length 54 [2021-11-09 10:44:44,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:44:44,929 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 61 transitions. [2021-11-09 10:44:44,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.25) internal successors, (63), 28 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) [2021-11-09 10:44:44,929 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 61 transitions. [2021-11-09 10:44:44,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-09 10:44:44,930 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:44:44,930 INFO L513 BasicCegarLoop]: trace histogram [22, 20, 6, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:44:44,972 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-09 10:44:45,156 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:44:45,156 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:44:45,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:44:45,156 INFO L85 PathProgramCache]: Analyzing trace with hash 852476360, now seen corresponding path program 19 times [2021-11-09 10:44:45,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:44:45,157 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750357679] [2021-11-09 10:44:45,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:44:45,157 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:44:45,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:44:45,427 INFO L134 CoverageAnalysis]: Checked inductivity of 505 backedges. 63 proven. 420 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-09 10:44:45,427 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:44:45,427 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750357679] [2021-11-09 10:44:45,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750357679] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:44:45,427 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222297806] [2021-11-09 10:44:45,427 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 10:44:45,428 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:44:45,428 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:44:45,429 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:44:45,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-09 10:44:45,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:44:45,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-09 10:44:45,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:44:45,934 INFO L134 CoverageAnalysis]: Checked inductivity of 505 backedges. 63 proven. 420 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-09 10:44:45,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222297806] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:44:45,935 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:44:45,935 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-11-09 10:44:45,936 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971480456] [2021-11-09 10:44:45,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-09 10:44:45,937 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:44:45,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-09 10:44:45,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-11-09 10:44:45,938 INFO L87 Difference]: Start difference. First operand 58 states and 61 transitions. Second operand has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:46,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:44:46,003 INFO L93 Difference]: Finished difference Result 76 states and 83 transitions. [2021-11-09 10:44:46,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-09 10:44:46,003 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-11-09 10:44:46,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:44:46,004 INFO L225 Difference]: With dead ends: 76 [2021-11-09 10:44:46,004 INFO L226 Difference]: Without dead ends: 60 [2021-11-09 10:44:46,004 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-11-09 10:44:46,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-11-09 10:44:46,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-11-09 10:44:46,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.0677966101694916) internal successors, (63), 59 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) [2021-11-09 10:44:46,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 63 transitions. [2021-11-09 10:44:46,008 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 63 transitions. Word has length 57 [2021-11-09 10:44:46,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:44:46,009 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 63 transitions. [2021-11-09 10:44:46,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:46,009 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 63 transitions. [2021-11-09 10:44:46,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-09 10:44:46,010 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:44:46,010 INFO L513 BasicCegarLoop]: trace histogram [23, 21, 6, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:44:46,035 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-09 10:44:46,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-11-09 10:44:46,224 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:44:46,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:44:46,224 INFO L85 PathProgramCache]: Analyzing trace with hash 1906895301, now seen corresponding path program 20 times [2021-11-09 10:44:46,224 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:44:46,224 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590050483] [2021-11-09 10:44:46,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:44:46,225 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:44:46,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:44:46,512 INFO L134 CoverageAnalysis]: Checked inductivity of 550 backedges. 66 proven. 462 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-09 10:44:46,512 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:44:46,512 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590050483] [2021-11-09 10:44:46,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590050483] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:44:46,512 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627236013] [2021-11-09 10:44:46,513 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 10:44:46,513 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:44:46,513 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:44:46,514 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:44:46,540 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-09 10:44:46,858 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 10:44:46,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:44:46,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-09 10:44:46,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:44:47,063 INFO L134 CoverageAnalysis]: Checked inductivity of 550 backedges. 66 proven. 462 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-09 10:44:47,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627236013] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:44:47,063 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:44:47,064 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-11-09 10:44:47,064 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26946823] [2021-11-09 10:44:47,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-09 10:44:47,064 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:44:47,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-09 10:44:47,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-11-09 10:44:47,066 INFO L87 Difference]: Start difference. First operand 60 states and 63 transitions. Second operand has 25 states, 25 states have (on average 2.28) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:47,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:44:47,129 INFO L93 Difference]: Finished difference Result 78 states and 85 transitions. [2021-11-09 10:44:47,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-09 10:44:47,129 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 25 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 59 [2021-11-09 10:44:47,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:44:47,130 INFO L225 Difference]: With dead ends: 78 [2021-11-09 10:44:47,130 INFO L226 Difference]: Without dead ends: 62 [2021-11-09 10:44:47,130 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-11-09 10:44:47,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-11-09 10:44:47,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2021-11-09 10:44:47,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.0655737704918034) internal successors, (65), 61 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:47,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 65 transitions. [2021-11-09 10:44:47,134 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 65 transitions. Word has length 59 [2021-11-09 10:44:47,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:44:47,135 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 65 transitions. [2021-11-09 10:44:47,135 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:47,135 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 65 transitions. [2021-11-09 10:44:47,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-09 10:44:47,136 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:44:47,136 INFO L513 BasicCegarLoop]: trace histogram [24, 22, 6, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:44:47,163 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-09 10:44:47,352 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:44:47,352 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:44:47,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:44:47,352 INFO L85 PathProgramCache]: Analyzing trace with hash 1591215746, now seen corresponding path program 21 times [2021-11-09 10:44:47,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:44:47,353 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583793635] [2021-11-09 10:44:47,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:44:47,353 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:44:47,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:44:47,620 INFO L134 CoverageAnalysis]: Checked inductivity of 597 backedges. 69 proven. 506 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-09 10:44:47,620 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:44:47,620 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583793635] [2021-11-09 10:44:47,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583793635] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:44:47,620 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062940556] [2021-11-09 10:44:47,620 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 10:44:47,620 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:44:47,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:44:47,628 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:44:47,644 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-09 10:44:47,979 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-09 10:44:47,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:44:47,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-09 10:44:47,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:44:48,460 INFO L134 CoverageAnalysis]: Checked inductivity of 597 backedges. 70 proven. 21 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2021-11-09 10:44:48,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062940556] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:44:48,460 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:44:48,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 9] total 32 [2021-11-09 10:44:48,460 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005060322] [2021-11-09 10:44:48,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-09 10:44:48,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:44:48,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-09 10:44:48,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=335, Invalid=657, Unknown=0, NotChecked=0, Total=992 [2021-11-09 10:44:48,462 INFO L87 Difference]: Start difference. First operand 62 states and 65 transitions. Second operand has 32 states, 32 states have (on average 2.1875) internal successors, (70), 32 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:48,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:44:48,911 INFO L93 Difference]: Finished difference Result 87 states and 98 transitions. [2021-11-09 10:44:48,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-09 10:44:48,912 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.1875) internal successors, (70), 32 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-11-09 10:44:48,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:44:48,912 INFO L225 Difference]: With dead ends: 87 [2021-11-09 10:44:48,912 INFO L226 Difference]: Without dead ends: 71 [2021-11-09 10:44:48,914 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1025, Invalid=1945, Unknown=0, NotChecked=0, Total=2970 [2021-11-09 10:44:48,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-11-09 10:44:48,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 65. [2021-11-09 10:44:48,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.0625) internal successors, (68), 64 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) [2021-11-09 10:44:48,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 68 transitions. [2021-11-09 10:44:48,921 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 68 transitions. Word has length 61 [2021-11-09 10:44:48,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:44:48,921 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 68 transitions. [2021-11-09 10:44:48,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.1875) internal successors, (70), 32 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:48,922 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 68 transitions. [2021-11-09 10:44:48,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-09 10:44:48,923 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:44:48,923 INFO L513 BasicCegarLoop]: trace histogram [25, 23, 7, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:44:48,959 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-09 10:44:49,136 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-11-09 10:44:49,136 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:44:49,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:44:49,136 INFO L85 PathProgramCache]: Analyzing trace with hash -641498803, now seen corresponding path program 22 times [2021-11-09 10:44:49,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:44:49,136 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788802206] [2021-11-09 10:44:49,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:44:49,137 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:44:49,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:44:49,437 INFO L134 CoverageAnalysis]: Checked inductivity of 653 backedges. 72 proven. 552 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-09 10:44:49,437 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:44:49,437 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788802206] [2021-11-09 10:44:49,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788802206] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:44:49,437 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015258318] [2021-11-09 10:44:49,437 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 10:44:49,437 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:44:49,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:44:49,438 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:44:49,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-09 10:44:49,774 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 10:44:49,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:44:49,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-09 10:44:49,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:44:49,954 INFO L134 CoverageAnalysis]: Checked inductivity of 653 backedges. 72 proven. 552 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-09 10:44:49,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015258318] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:44:49,954 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:44:49,954 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2021-11-09 10:44:49,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697634596] [2021-11-09 10:44:49,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-09 10:44:49,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:44:49,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-09 10:44:49,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2021-11-09 10:44:49,956 INFO L87 Difference]: Start difference. First operand 65 states and 68 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:50,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:44:50,064 INFO L93 Difference]: Finished difference Result 84 states and 91 transitions. [2021-11-09 10:44:50,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-09 10:44:50,064 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 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 64 [2021-11-09 10:44:50,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:44:50,066 INFO L225 Difference]: With dead ends: 84 [2021-11-09 10:44:50,066 INFO L226 Difference]: Without dead ends: 67 [2021-11-09 10:44:50,067 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2021-11-09 10:44:50,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-11-09 10:44:50,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2021-11-09 10:44:50,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.0606060606060606) internal successors, (70), 66 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:50,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 70 transitions. [2021-11-09 10:44:50,072 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 70 transitions. Word has length 64 [2021-11-09 10:44:50,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:44:50,072 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 70 transitions. [2021-11-09 10:44:50,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:50,073 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 70 transitions. [2021-11-09 10:44:50,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-09 10:44:50,074 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:44:50,074 INFO L513 BasicCegarLoop]: trace histogram [26, 24, 7, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:44:50,103 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-09 10:44:50,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-09 10:44:50,292 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:44:50,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:44:50,292 INFO L85 PathProgramCache]: Analyzing trace with hash -601238864, now seen corresponding path program 23 times [2021-11-09 10:44:50,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:44:50,292 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466760289] [2021-11-09 10:44:50,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:44:50,293 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:44:50,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:44:50,596 INFO L134 CoverageAnalysis]: Checked inductivity of 704 backedges. 75 proven. 600 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-09 10:44:50,597 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:44:50,597 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466760289] [2021-11-09 10:44:50,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466760289] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:44:50,597 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577312403] [2021-11-09 10:44:50,597 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 10:44:50,597 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:44:50,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:44:50,598 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:44:50,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-09 10:44:50,944 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 27 check-sat command(s) [2021-11-09 10:44:50,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:44:50,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-09 10:44:50,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:44:51,152 INFO L134 CoverageAnalysis]: Checked inductivity of 704 backedges. 75 proven. 600 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-09 10:44:51,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577312403] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:44:51,152 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:44:51,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2021-11-09 10:44:51,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169819525] [2021-11-09 10:44:51,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-09 10:44:51,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:44:51,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-09 10:44:51,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2021-11-09 10:44:51,157 INFO L87 Difference]: Start difference. First operand 67 states and 70 transitions. Second operand has 28 states, 28 states have (on average 2.25) internal successors, (63), 28 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) [2021-11-09 10:44:51,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:44:51,253 INFO L93 Difference]: Finished difference Result 86 states and 93 transitions. [2021-11-09 10:44:51,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-09 10:44:51,254 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.25) internal successors, (63), 28 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 66 [2021-11-09 10:44:51,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:44:51,254 INFO L225 Difference]: With dead ends: 86 [2021-11-09 10:44:51,255 INFO L226 Difference]: Without dead ends: 69 [2021-11-09 10:44:51,255 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2021-11-09 10:44:51,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-11-09 10:44:51,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2021-11-09 10:44:51,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.0588235294117647) internal successors, (72), 68 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:51,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 72 transitions. [2021-11-09 10:44:51,261 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 72 transitions. Word has length 66 [2021-11-09 10:44:51,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:44:51,261 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 72 transitions. [2021-11-09 10:44:51,261 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.25) internal successors, (63), 28 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) [2021-11-09 10:44:51,261 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 72 transitions. [2021-11-09 10:44:51,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-09 10:44:51,262 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:44:51,262 INFO L513 BasicCegarLoop]: trace histogram [27, 25, 7, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:44:51,302 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-09 10:44:51,481 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-09 10:44:51,481 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:44:51,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:44:51,482 INFO L85 PathProgramCache]: Analyzing trace with hash -566143149, now seen corresponding path program 24 times [2021-11-09 10:44:51,482 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:44:51,482 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232475581] [2021-11-09 10:44:51,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:44:51,482 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:44:51,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:44:51,839 INFO L134 CoverageAnalysis]: Checked inductivity of 757 backedges. 78 proven. 650 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-09 10:44:51,839 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:44:51,839 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232475581] [2021-11-09 10:44:51,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232475581] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:44:51,840 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874286005] [2021-11-09 10:44:51,840 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 10:44:51,840 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:44:51,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:44:51,844 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:44:51,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-09 10:44:52,250 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-11-09 10:44:52,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:44:52,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-09 10:44:52,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:44:52,769 INFO L134 CoverageAnalysis]: Checked inductivity of 757 backedges. 79 proven. 28 refuted. 0 times theorem prover too weak. 650 trivial. 0 not checked. [2021-11-09 10:44:52,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874286005] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:44:52,769 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:44:52,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 10] total 36 [2021-11-09 10:44:52,769 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247995272] [2021-11-09 10:44:52,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-09 10:44:52,770 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:44:52,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-09 10:44:52,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=422, Invalid=838, Unknown=0, NotChecked=0, Total=1260 [2021-11-09 10:44:52,771 INFO L87 Difference]: Start difference. First operand 69 states and 72 transitions. Second operand has 36 states, 36 states have (on average 2.138888888888889) internal successors, (77), 36 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:53,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:44:53,272 INFO L93 Difference]: Finished difference Result 95 states and 106 transitions. [2021-11-09 10:44:53,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-09 10:44:53,272 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.138888888888889) internal successors, (77), 36 states have internal predecessors, (77), 0 states have call successors, (0), 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 68 [2021-11-09 10:44:53,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:44:53,273 INFO L225 Difference]: With dead ends: 95 [2021-11-09 10:44:53,273 INFO L226 Difference]: Without dead ends: 78 [2021-11-09 10:44:53,275 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 571 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1306, Invalid=2476, Unknown=0, NotChecked=0, Total=3782 [2021-11-09 10:44:53,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-11-09 10:44:53,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 72. [2021-11-09 10:44:53,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.056338028169014) internal successors, (75), 71 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:53,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 75 transitions. [2021-11-09 10:44:53,281 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 75 transitions. Word has length 68 [2021-11-09 10:44:53,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:44:53,281 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 75 transitions. [2021-11-09 10:44:53,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.138888888888889) internal successors, (77), 36 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:53,281 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 75 transitions. [2021-11-09 10:44:53,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-09 10:44:53,282 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:44:53,282 INFO L513 BasicCegarLoop]: trace histogram [28, 26, 8, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:44:53,307 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-09 10:44:53,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-09 10:44:53,493 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:44:53,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:44:53,493 INFO L85 PathProgramCache]: Analyzing trace with hash 1490489590, now seen corresponding path program 25 times [2021-11-09 10:44:53,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:44:53,494 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481983969] [2021-11-09 10:44:53,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:44:53,494 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:44:53,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:44:53,895 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 81 proven. 702 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-09 10:44:53,895 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:44:53,895 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481983969] [2021-11-09 10:44:53,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481983969] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:44:53,895 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583538308] [2021-11-09 10:44:53,895 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 10:44:53,895 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:44:53,896 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:44:53,897 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:44:53,917 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-09 10:44:54,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:44:54,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-09 10:44:54,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:44:54,678 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 81 proven. 702 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-09 10:44:54,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583538308] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:44:54,679 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:44:54,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2021-11-09 10:44:54,679 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886942149] [2021-11-09 10:44:54,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-09 10:44:54,680 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:44:54,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-09 10:44:54,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2021-11-09 10:44:54,681 INFO L87 Difference]: Start difference. First operand 72 states and 75 transitions. Second operand has 30 states, 30 states have (on average 2.2333333333333334) internal successors, (67), 30 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:54,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:44:54,758 INFO L93 Difference]: Finished difference Result 92 states and 99 transitions. [2021-11-09 10:44:54,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-09 10:44:54,758 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.2333333333333334) internal successors, (67), 30 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-09 10:44:54,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:44:54,759 INFO L225 Difference]: With dead ends: 92 [2021-11-09 10:44:54,759 INFO L226 Difference]: Without dead ends: 74 [2021-11-09 10:44:54,759 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2021-11-09 10:44:54,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-11-09 10:44:54,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2021-11-09 10:44:54,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.0547945205479452) internal successors, (77), 73 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:54,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 77 transitions. [2021-11-09 10:44:54,763 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 77 transitions. Word has length 71 [2021-11-09 10:44:54,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:44:54,763 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 77 transitions. [2021-11-09 10:44:54,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.2333333333333334) internal successors, (67), 30 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:54,764 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 77 transitions. [2021-11-09 10:44:54,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-09 10:44:54,764 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:44:54,764 INFO L513 BasicCegarLoop]: trace histogram [29, 27, 8, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:44:54,799 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-09 10:44:54,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:44:54,988 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:44:54,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:44:54,988 INFO L85 PathProgramCache]: Analyzing trace with hash 1660418611, now seen corresponding path program 26 times [2021-11-09 10:44:54,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:44:54,988 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363970016] [2021-11-09 10:44:54,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:44:54,989 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:44:55,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:44:55,400 INFO L134 CoverageAnalysis]: Checked inductivity of 877 backedges. 84 proven. 756 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-09 10:44:55,400 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:44:55,400 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363970016] [2021-11-09 10:44:55,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363970016] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:44:55,400 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857315869] [2021-11-09 10:44:55,400 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 10:44:55,401 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:44:55,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:44:55,404 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:44:55,428 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-09 10:44:55,995 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 10:44:55,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:44:55,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-09 10:44:56,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:44:56,225 INFO L134 CoverageAnalysis]: Checked inductivity of 877 backedges. 84 proven. 756 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-09 10:44:56,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857315869] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:44:56,225 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:44:56,225 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2021-11-09 10:44:56,225 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918674501] [2021-11-09 10:44:56,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-09 10:44:56,226 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:44:56,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-09 10:44:56,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2021-11-09 10:44:56,227 INFO L87 Difference]: Start difference. First operand 74 states and 77 transitions. Second operand has 31 states, 31 states have (on average 2.225806451612903) internal successors, (69), 31 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:56,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:44:56,311 INFO L93 Difference]: Finished difference Result 94 states and 101 transitions. [2021-11-09 10:44:56,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-09 10:44:56,312 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.225806451612903) internal successors, (69), 31 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 73 [2021-11-09 10:44:56,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:44:56,313 INFO L225 Difference]: With dead ends: 94 [2021-11-09 10:44:56,313 INFO L226 Difference]: Without dead ends: 76 [2021-11-09 10:44:56,313 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2021-11-09 10:44:56,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-11-09 10:44:56,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2021-11-09 10:44:56,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.0533333333333332) internal successors, (79), 75 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:56,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 79 transitions. [2021-11-09 10:44:56,318 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 79 transitions. Word has length 73 [2021-11-09 10:44:56,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:44:56,319 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 79 transitions. [2021-11-09 10:44:56,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.225806451612903) internal successors, (69), 31 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:56,319 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 79 transitions. [2021-11-09 10:44:56,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-09 10:44:56,320 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:44:56,320 INFO L513 BasicCegarLoop]: trace histogram [30, 28, 8, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:44:56,356 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-11-09 10:44:56,521 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-11-09 10:44:56,521 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:44:56,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:44:56,521 INFO L85 PathProgramCache]: Analyzing trace with hash 1753450544, now seen corresponding path program 27 times [2021-11-09 10:44:56,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:44:56,521 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366850984] [2021-11-09 10:44:56,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:44:56,522 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:44:56,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:44:56,961 INFO L134 CoverageAnalysis]: Checked inductivity of 936 backedges. 87 proven. 812 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-09 10:44:56,961 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:44:56,961 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366850984] [2021-11-09 10:44:56,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366850984] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:44:56,961 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054411020] [2021-11-09 10:44:56,962 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 10:44:56,962 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:44:56,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:44:56,963 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:44:56,985 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-09 10:44:57,506 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-09 10:44:57,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:44:57,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-09 10:44:57,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:44:58,084 INFO L134 CoverageAnalysis]: Checked inductivity of 936 backedges. 88 proven. 36 refuted. 0 times theorem prover too weak. 812 trivial. 0 not checked. [2021-11-09 10:44:58,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054411020] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:44:58,084 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:44:58,084 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 11] total 40 [2021-11-09 10:44:58,084 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003648291] [2021-11-09 10:44:58,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-11-09 10:44:58,084 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:44:58,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-11-09 10:44:58,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=519, Invalid=1041, Unknown=0, NotChecked=0, Total=1560 [2021-11-09 10:44:58,085 INFO L87 Difference]: Start difference. First operand 76 states and 79 transitions. Second operand has 40 states, 40 states have (on average 2.1) internal successors, (84), 40 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:58,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:44:58,661 INFO L93 Difference]: Finished difference Result 103 states and 114 transitions. [2021-11-09 10:44:58,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-09 10:44:58,662 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.1) internal successors, (84), 40 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-11-09 10:44:58,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:44:58,663 INFO L225 Difference]: With dead ends: 103 [2021-11-09 10:44:58,663 INFO L226 Difference]: Without dead ends: 85 [2021-11-09 10:44:58,668 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 711 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1621, Invalid=3071, Unknown=0, NotChecked=0, Total=4692 [2021-11-09 10:44:58,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-11-09 10:44:58,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 79. [2021-11-09 10:44:58,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.0512820512820513) internal successors, (82), 78 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:58,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 82 transitions. [2021-11-09 10:44:58,675 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 82 transitions. Word has length 75 [2021-11-09 10:44:58,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:44:58,675 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 82 transitions. [2021-11-09 10:44:58,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.1) internal successors, (84), 40 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:58,675 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 82 transitions. [2021-11-09 10:44:58,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-09 10:44:58,676 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:44:58,676 INFO L513 BasicCegarLoop]: trace histogram [31, 29, 9, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:44:58,709 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-11-09 10:44:58,900 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:44:58,900 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:44:58,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:44:58,900 INFO L85 PathProgramCache]: Analyzing trace with hash -215532513, now seen corresponding path program 28 times [2021-11-09 10:44:58,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:44:58,900 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279162269] [2021-11-09 10:44:58,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:44:58,901 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:44:58,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:44:59,280 INFO L134 CoverageAnalysis]: Checked inductivity of 1006 backedges. 90 proven. 870 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-09 10:44:59,280 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:44:59,281 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279162269] [2021-11-09 10:44:59,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279162269] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:44:59,281 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180823231] [2021-11-09 10:44:59,281 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 10:44:59,281 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:44:59,281 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:44:59,282 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:44:59,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-09 10:44:59,784 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 10:44:59,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:44:59,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-09 10:44:59,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:45:00,015 INFO L134 CoverageAnalysis]: Checked inductivity of 1006 backedges. 90 proven. 870 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-09 10:45:00,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180823231] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:45:00,016 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:45:00,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2021-11-09 10:45:00,016 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139019917] [2021-11-09 10:45:00,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-09 10:45:00,016 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:45:00,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-09 10:45:00,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2021-11-09 10:45:00,017 INFO L87 Difference]: Start difference. First operand 79 states and 82 transitions. Second operand has 33 states, 33 states have (on average 2.212121212121212) internal successors, (73), 33 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:00,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:45:00,122 INFO L93 Difference]: Finished difference Result 100 states and 107 transitions. [2021-11-09 10:45:00,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-09 10:45:00,122 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.212121212121212) internal successors, (73), 33 states have internal predecessors, (73), 0 states have call successors, (0), 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 78 [2021-11-09 10:45:00,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:45:00,123 INFO L225 Difference]: With dead ends: 100 [2021-11-09 10:45:00,123 INFO L226 Difference]: Without dead ends: 81 [2021-11-09 10:45:00,124 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2021-11-09 10:45:00,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-11-09 10:45:00,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2021-11-09 10:45:00,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.05) internal successors, (84), 80 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:00,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 84 transitions. [2021-11-09 10:45:00,129 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 84 transitions. Word has length 78 [2021-11-09 10:45:00,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:45:00,129 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 84 transitions. [2021-11-09 10:45:00,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.212121212121212) internal successors, (73), 33 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:00,130 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 84 transitions. [2021-11-09 10:45:00,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-09 10:45:00,130 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:45:00,130 INFO L513 BasicCegarLoop]: trace histogram [32, 30, 9, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:45:00,161 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2021-11-09 10:45:00,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:45:00,344 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:45:00,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:45:00,344 INFO L85 PathProgramCache]: Analyzing trace with hash -142220222, now seen corresponding path program 29 times [2021-11-09 10:45:00,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:45:00,345 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803729205] [2021-11-09 10:45:00,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:45:00,345 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:45:00,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:45:00,865 INFO L134 CoverageAnalysis]: Checked inductivity of 1069 backedges. 93 proven. 930 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-09 10:45:00,866 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:45:00,866 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803729205] [2021-11-09 10:45:00,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803729205] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:45:00,866 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155836598] [2021-11-09 10:45:00,866 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 10:45:00,866 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:45:00,866 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:45:00,868 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:45:00,869 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-09 10:45:01,469 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 33 check-sat command(s) [2021-11-09 10:45:01,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:45:01,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-09 10:45:01,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:45:01,771 INFO L134 CoverageAnalysis]: Checked inductivity of 1069 backedges. 93 proven. 930 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-09 10:45:01,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155836598] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:45:01,772 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:45:01,772 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2021-11-09 10:45:01,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139758106] [2021-11-09 10:45:01,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-09 10:45:01,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:45:01,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-09 10:45:01,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2021-11-09 10:45:01,775 INFO L87 Difference]: Start difference. First operand 81 states and 84 transitions. Second operand has 34 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 34 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:01,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:45:01,863 INFO L93 Difference]: Finished difference Result 102 states and 109 transitions. [2021-11-09 10:45:01,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-09 10:45:01,863 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 34 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-11-09 10:45:01,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:45:01,864 INFO L225 Difference]: With dead ends: 102 [2021-11-09 10:45:01,864 INFO L226 Difference]: Without dead ends: 83 [2021-11-09 10:45:01,865 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2021-11-09 10:45:01,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-11-09 10:45:01,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2021-11-09 10:45:01,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.048780487804878) internal successors, (86), 82 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:01,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 86 transitions. [2021-11-09 10:45:01,872 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 86 transitions. Word has length 80 [2021-11-09 10:45:01,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:45:01,873 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 86 transitions. [2021-11-09 10:45:01,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 34 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:01,873 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 86 transitions. [2021-11-09 10:45:01,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-09 10:45:01,874 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:45:01,874 INFO L513 BasicCegarLoop]: trace histogram [33, 31, 9, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:45:01,903 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-11-09 10:45:02,080 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-11-09 10:45:02,080 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:45:02,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:45:02,080 INFO L85 PathProgramCache]: Analyzing trace with hash 1591414693, now seen corresponding path program 30 times [2021-11-09 10:45:02,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:45:02,081 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452133399] [2021-11-09 10:45:02,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:45:02,081 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:45:02,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:45:02,628 INFO L134 CoverageAnalysis]: Checked inductivity of 1134 backedges. 96 proven. 992 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-09 10:45:02,628 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:45:02,629 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452133399] [2021-11-09 10:45:02,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452133399] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:45:02,629 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256073438] [2021-11-09 10:45:02,629 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 10:45:02,629 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:45:02,629 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:45:02,630 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:45:02,631 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-11-09 10:45:03,223 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-11-09 10:45:03,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:45:03,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-09 10:45:03,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:45:03,960 INFO L134 CoverageAnalysis]: Checked inductivity of 1134 backedges. 97 proven. 45 refuted. 0 times theorem prover too weak. 992 trivial. 0 not checked. [2021-11-09 10:45:03,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256073438] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:45:03,960 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:45:03,960 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 12] total 44 [2021-11-09 10:45:03,961 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354939810] [2021-11-09 10:45:03,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-11-09 10:45:03,961 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:45:03,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-11-09 10:45:03,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=626, Invalid=1266, Unknown=0, NotChecked=0, Total=1892 [2021-11-09 10:45:03,962 INFO L87 Difference]: Start difference. First operand 83 states and 86 transitions. Second operand has 44 states, 44 states have (on average 2.0681818181818183) internal successors, (91), 44 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:04,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:45:04,694 INFO L93 Difference]: Finished difference Result 111 states and 122 transitions. [2021-11-09 10:45:04,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-11-09 10:45:04,694 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.0681818181818183) internal successors, (91), 44 states have internal predecessors, (91), 0 states have call successors, (0), 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 82 [2021-11-09 10:45:04,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:45:04,695 INFO L225 Difference]: With dead ends: 111 [2021-11-09 10:45:04,695 INFO L226 Difference]: Without dead ends: 92 [2021-11-09 10:45:04,697 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 866 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1970, Invalid=3730, Unknown=0, NotChecked=0, Total=5700 [2021-11-09 10:45:04,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-11-09 10:45:04,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 86. [2021-11-09 10:45:04,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.0470588235294118) internal successors, (89), 85 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:04,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 89 transitions. [2021-11-09 10:45:04,714 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 89 transitions. Word has length 82 [2021-11-09 10:45:04,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:45:04,714 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 89 transitions. [2021-11-09 10:45:04,715 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.0681818181818183) internal successors, (91), 44 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:04,715 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 89 transitions. [2021-11-09 10:45:04,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-09 10:45:04,715 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:45:04,715 INFO L513 BasicCegarLoop]: trace histogram [34, 32, 10, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:45:04,740 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2021-11-09 10:45:04,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-11-09 10:45:04,916 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:45:04,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:45:04,917 INFO L85 PathProgramCache]: Analyzing trace with hash 1826898980, now seen corresponding path program 31 times [2021-11-09 10:45:04,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:45:04,917 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831793590] [2021-11-09 10:45:04,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:45:04,917 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:45:04,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:45:05,586 INFO L134 CoverageAnalysis]: Checked inductivity of 1211 backedges. 99 proven. 1056 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-09 10:45:05,587 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:45:05,587 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831793590] [2021-11-09 10:45:05,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831793590] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:45:05,587 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183410034] [2021-11-09 10:45:05,587 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 10:45:05,587 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:45:05,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:45:05,592 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:45:05,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-09 10:45:06,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:45:06,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-09 10:45:06,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:45:06,507 INFO L134 CoverageAnalysis]: Checked inductivity of 1211 backedges. 99 proven. 1056 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-09 10:45:06,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183410034] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:45:06,508 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:45:06,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2021-11-09 10:45:06,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660396454] [2021-11-09 10:45:06,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-09 10:45:06,509 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:45:06,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-09 10:45:06,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2021-11-09 10:45:06,510 INFO L87 Difference]: Start difference. First operand 86 states and 89 transitions. Second operand has 36 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 36 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:06,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:45:06,624 INFO L93 Difference]: Finished difference Result 108 states and 115 transitions. [2021-11-09 10:45:06,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-09 10:45:06,625 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 36 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-11-09 10:45:06,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:45:06,626 INFO L225 Difference]: With dead ends: 108 [2021-11-09 10:45:06,626 INFO L226 Difference]: Without dead ends: 88 [2021-11-09 10:45:06,627 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2021-11-09 10:45:06,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-11-09 10:45:06,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2021-11-09 10:45:06,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 1.0459770114942528) internal successors, (91), 87 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:06,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 91 transitions. [2021-11-09 10:45:06,634 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 91 transitions. Word has length 85 [2021-11-09 10:45:06,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:45:06,634 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 91 transitions. [2021-11-09 10:45:06,634 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 36 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:06,635 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 91 transitions. [2021-11-09 10:45:06,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-09 10:45:06,635 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:45:06,635 INFO L513 BasicCegarLoop]: trace histogram [35, 33, 10, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:45:06,676 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-11-09 10:45:06,860 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-11-09 10:45:06,861 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:45:06,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:45:06,861 INFO L85 PathProgramCache]: Analyzing trace with hash 1543618209, now seen corresponding path program 32 times [2021-11-09 10:45:06,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:45:06,861 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777801733] [2021-11-09 10:45:06,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:45:06,861 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:45:06,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:45:07,393 INFO L134 CoverageAnalysis]: Checked inductivity of 1280 backedges. 102 proven. 1122 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-09 10:45:07,394 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:45:07,394 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777801733] [2021-11-09 10:45:07,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777801733] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:45:07,394 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217953385] [2021-11-09 10:45:07,395 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 10:45:07,395 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:45:07,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:45:07,401 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:45:07,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-09 10:45:08,065 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 10:45:08,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:45:08,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-09 10:45:08,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:45:08,294 INFO L134 CoverageAnalysis]: Checked inductivity of 1280 backedges. 102 proven. 1122 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-09 10:45:08,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217953385] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:45:08,294 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:45:08,294 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2021-11-09 10:45:08,294 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131012185] [2021-11-09 10:45:08,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-09 10:45:08,295 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:45:08,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-09 10:45:08,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2021-11-09 10:45:08,296 INFO L87 Difference]: Start difference. First operand 88 states and 91 transitions. Second operand has 37 states, 37 states have (on average 2.189189189189189) internal successors, (81), 37 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:08,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:45:08,392 INFO L93 Difference]: Finished difference Result 110 states and 117 transitions. [2021-11-09 10:45:08,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-09 10:45:08,392 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.189189189189189) internal successors, (81), 37 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 87 [2021-11-09 10:45:08,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:45:08,393 INFO L225 Difference]: With dead ends: 110 [2021-11-09 10:45:08,393 INFO L226 Difference]: Without dead ends: 90 [2021-11-09 10:45:08,394 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2021-11-09 10:45:08,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-11-09 10:45:08,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2021-11-09 10:45:08,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 1.0449438202247192) internal successors, (93), 89 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:08,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 93 transitions. [2021-11-09 10:45:08,399 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 93 transitions. Word has length 87 [2021-11-09 10:45:08,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:45:08,400 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 93 transitions. [2021-11-09 10:45:08,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.189189189189189) internal successors, (81), 37 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:08,400 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 93 transitions. [2021-11-09 10:45:08,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-09 10:45:08,401 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:45:08,401 INFO L513 BasicCegarLoop]: trace histogram [36, 34, 10, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:45:08,426 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-11-09 10:45:08,601 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-11-09 10:45:08,601 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:45:08,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:45:08,602 INFO L85 PathProgramCache]: Analyzing trace with hash -106263074, now seen corresponding path program 33 times [2021-11-09 10:45:08,602 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:45:08,602 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964070060] [2021-11-09 10:45:08,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:45:08,602 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:45:08,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:45:09,318 INFO L134 CoverageAnalysis]: Checked inductivity of 1351 backedges. 105 proven. 1190 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-09 10:45:09,318 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:45:09,318 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964070060] [2021-11-09 10:45:09,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964070060] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:45:09,319 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712193442] [2021-11-09 10:45:09,319 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 10:45:09,319 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:45:09,319 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:45:09,327 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:45:09,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-11-09 10:45:10,056 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-09 10:45:10,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:45:10,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-09 10:45:10,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:45:10,414 INFO L134 CoverageAnalysis]: Checked inductivity of 1351 backedges. 170 proven. 4 refuted. 0 times theorem prover too weak. 1177 trivial. 0 not checked. [2021-11-09 10:45:10,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712193442] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:45:10,415 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:45:10,415 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 5] total 40 [2021-11-09 10:45:10,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669459939] [2021-11-09 10:45:10,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-11-09 10:45:10,416 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:45:10,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-11-09 10:45:10,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2021-11-09 10:45:10,417 INFO L87 Difference]: Start difference. First operand 90 states and 93 transitions. Second operand has 40 states, 40 states have (on average 2.225) internal successors, (89), 40 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:10,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:45:10,554 INFO L93 Difference]: Finished difference Result 115 states and 125 transitions. [2021-11-09 10:45:10,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-09 10:45:10,554 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.225) internal successors, (89), 40 states have internal predecessors, (89), 0 states have call successors, (0), 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 [2021-11-09 10:45:10,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:45:10,555 INFO L225 Difference]: With dead ends: 115 [2021-11-09 10:45:10,555 INFO L226 Difference]: Without dead ends: 95 [2021-11-09 10:45:10,556 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2021-11-09 10:45:10,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-11-09 10:45:10,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 94. [2021-11-09 10:45:10,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 1.053763440860215) internal successors, (98), 93 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:10,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 98 transitions. [2021-11-09 10:45:10,564 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 98 transitions. Word has length 89 [2021-11-09 10:45:10,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:45:10,564 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 98 transitions. [2021-11-09 10:45:10,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.225) internal successors, (89), 40 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:10,564 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 98 transitions. [2021-11-09 10:45:10,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-09 10:45:10,564 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:45:10,565 INFO L513 BasicCegarLoop]: trace histogram [38, 35, 10, 3, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:45:10,590 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-11-09 10:45:10,765 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:45:10,765 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:45:10,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:45:10,766 INFO L85 PathProgramCache]: Analyzing trace with hash -1851451562, now seen corresponding path program 34 times [2021-11-09 10:45:10,766 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:45:10,766 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844220388] [2021-11-09 10:45:10,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:45:10,766 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:45:10,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:45:11,672 INFO L134 CoverageAnalysis]: Checked inductivity of 1499 backedges. 180 proven. 1260 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-11-09 10:45:11,672 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:45:11,672 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844220388] [2021-11-09 10:45:11,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844220388] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:45:11,673 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546727584] [2021-11-09 10:45:11,673 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 10:45:11,673 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:45:11,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:45:11,674 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:45:11,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-11-09 10:45:12,480 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 10:45:12,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:45:12,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-09 10:45:12,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:45:12,741 INFO L134 CoverageAnalysis]: Checked inductivity of 1499 backedges. 180 proven. 1260 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-11-09 10:45:12,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546727584] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:45:12,741 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:45:12,741 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2021-11-09 10:45:12,742 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055563574] [2021-11-09 10:45:12,742 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-11-09 10:45:12,742 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:45:12,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-11-09 10:45:12,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2021-11-09 10:45:12,744 INFO L87 Difference]: Start difference. First operand 94 states and 98 transitions. Second operand has 39 states, 39 states have (on average 2.1794871794871793) internal successors, (85), 39 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:12,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:45:12,858 INFO L93 Difference]: Finished difference Result 118 states and 127 transitions. [2021-11-09 10:45:12,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-09 10:45:12,859 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.1794871794871793) internal successors, (85), 39 states have internal predecessors, (85), 0 states have call successors, (0), 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 [2021-11-09 10:45:12,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:45:12,860 INFO L225 Difference]: With dead ends: 118 [2021-11-09 10:45:12,860 INFO L226 Difference]: Without dead ends: 96 [2021-11-09 10:45:12,861 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2021-11-09 10:45:12,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-11-09 10:45:12,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2021-11-09 10:45:12,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.0526315789473684) internal successors, (100), 95 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:12,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 100 transitions. [2021-11-09 10:45:12,873 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 100 transitions. Word has length 93 [2021-11-09 10:45:12,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:45:12,873 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 100 transitions. [2021-11-09 10:45:12,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.1794871794871793) internal successors, (85), 39 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:12,874 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 100 transitions. [2021-11-09 10:45:12,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-09 10:45:12,874 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:45:12,874 INFO L513 BasicCegarLoop]: trace histogram [39, 36, 10, 3, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:45:12,907 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2021-11-09 10:45:13,100 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:45:13,100 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:45:13,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:45:13,100 INFO L85 PathProgramCache]: Analyzing trace with hash 370328787, now seen corresponding path program 35 times [2021-11-09 10:45:13,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:45:13,101 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060639842] [2021-11-09 10:45:13,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:45:13,101 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:45:13,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:45:13,659 INFO L134 CoverageAnalysis]: Checked inductivity of 1576 backedges. 185 proven. 1332 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-11-09 10:45:13,659 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:45:13,659 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060639842] [2021-11-09 10:45:13,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060639842] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:45:13,660 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832067890] [2021-11-09 10:45:13,660 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 10:45:13,660 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:45:13,660 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:45:13,661 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:45:13,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-11-09 10:45:14,351 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 40 check-sat command(s) [2021-11-09 10:45:14,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:45:14,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-09 10:45:14,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:45:14,615 INFO L134 CoverageAnalysis]: Checked inductivity of 1576 backedges. 185 proven. 1332 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-11-09 10:45:14,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832067890] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:45:14,615 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:45:14,615 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2021-11-09 10:45:14,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371892345] [2021-11-09 10:45:14,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-11-09 10:45:14,616 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:45:14,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-11-09 10:45:14,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2021-11-09 10:45:14,617 INFO L87 Difference]: Start difference. First operand 96 states and 100 transitions. Second operand has 40 states, 40 states have (on average 2.175) internal successors, (87), 40 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:14,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:45:14,735 INFO L93 Difference]: Finished difference Result 120 states and 129 transitions. [2021-11-09 10:45:14,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-09 10:45:14,735 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.175) internal successors, (87), 40 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-11-09 10:45:14,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:45:14,736 INFO L225 Difference]: With dead ends: 120 [2021-11-09 10:45:14,736 INFO L226 Difference]: Without dead ends: 98 [2021-11-09 10:45:14,737 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2021-11-09 10:45:14,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-11-09 10:45:14,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2021-11-09 10:45:14,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 1.0515463917525774) internal successors, (102), 97 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:14,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 102 transitions. [2021-11-09 10:45:14,745 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 102 transitions. Word has length 95 [2021-11-09 10:45:14,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:45:14,745 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 102 transitions. [2021-11-09 10:45:14,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.175) internal successors, (87), 40 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:14,746 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 102 transitions. [2021-11-09 10:45:14,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-09 10:45:14,746 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:45:14,747 INFO L513 BasicCegarLoop]: trace histogram [40, 37, 10, 3, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:45:14,774 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-11-09 10:45:14,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-11-09 10:45:14,964 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:45:14,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:45:14,964 INFO L85 PathProgramCache]: Analyzing trace with hash 902498064, now seen corresponding path program 36 times [2021-11-09 10:45:14,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:45:14,964 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741569842] [2021-11-09 10:45:14,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:45:14,965 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:45:14,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:45:15,574 INFO L134 CoverageAnalysis]: Checked inductivity of 1655 backedges. 190 proven. 1406 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-11-09 10:45:15,574 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:45:15,574 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741569842] [2021-11-09 10:45:15,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741569842] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:45:15,574 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696398111] [2021-11-09 10:45:15,574 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 10:45:15,574 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:45:15,575 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:45:15,575 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:45:15,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-11-09 10:45:16,270 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-11-09 10:45:16,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:45:16,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-09 10:45:16,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:45:16,990 INFO L134 CoverageAnalysis]: Checked inductivity of 1655 backedges. 194 proven. 55 refuted. 0 times theorem prover too weak. 1406 trivial. 0 not checked. [2021-11-09 10:45:16,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696398111] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:45:16,990 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:45:16,990 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 13] total 51 [2021-11-09 10:45:16,991 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010159808] [2021-11-09 10:45:16,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-11-09 10:45:16,991 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:45:16,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-11-09 10:45:16,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=857, Invalid=1693, Unknown=0, NotChecked=0, Total=2550 [2021-11-09 10:45:16,992 INFO L87 Difference]: Start difference. First operand 98 states and 102 transitions. Second operand has 51 states, 51 states have (on average 2.0784313725490198) internal successors, (106), 51 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:17,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:45:17,827 INFO L93 Difference]: Finished difference Result 135 states and 151 transitions. [2021-11-09 10:45:17,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-11-09 10:45:17,827 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.0784313725490198) internal successors, (106), 51 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 97 [2021-11-09 10:45:17,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:45:17,828 INFO L225 Difference]: With dead ends: 135 [2021-11-09 10:45:17,828 INFO L226 Difference]: Without dead ends: 113 [2021-11-09 10:45:17,829 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1228 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2681, Invalid=5151, Unknown=0, NotChecked=0, Total=7832 [2021-11-09 10:45:17,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-11-09 10:45:17,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 101. [2021-11-09 10:45:17,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.05) internal successors, (105), 100 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:17,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 105 transitions. [2021-11-09 10:45:17,836 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 105 transitions. Word has length 97 [2021-11-09 10:45:17,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:45:17,836 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 105 transitions. [2021-11-09 10:45:17,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.0784313725490198) internal successors, (106), 51 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:17,836 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 105 transitions. [2021-11-09 10:45:17,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-09 10:45:17,837 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:45:17,837 INFO L513 BasicCegarLoop]: trace histogram [41, 38, 11, 3, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:45:17,862 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2021-11-09 10:45:18,044 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-11-09 10:45:18,044 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:45:18,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:45:18,044 INFO L85 PathProgramCache]: Analyzing trace with hash -955024129, now seen corresponding path program 37 times [2021-11-09 10:45:18,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:45:18,044 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534508323] [2021-11-09 10:45:18,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:45:18,045 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:45:18,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:45:18,762 INFO L134 CoverageAnalysis]: Checked inductivity of 1747 backedges. 195 proven. 1482 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-11-09 10:45:18,763 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:45:18,763 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534508323] [2021-11-09 10:45:18,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534508323] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:45:18,763 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474000199] [2021-11-09 10:45:18,763 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 10:45:18,763 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:45:18,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:45:18,764 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:45:18,772 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-11-09 10:45:19,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:45:19,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 40 conjunts are in the unsatisfiable core [2021-11-09 10:45:19,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:45:19,795 INFO L134 CoverageAnalysis]: Checked inductivity of 1747 backedges. 195 proven. 1482 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-11-09 10:45:19,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1474000199] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:45:19,795 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:45:19,796 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2021-11-09 10:45:19,796 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934727883] [2021-11-09 10:45:19,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-11-09 10:45:19,796 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:45:19,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-11-09 10:45:19,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2021-11-09 10:45:19,798 INFO L87 Difference]: Start difference. First operand 101 states and 105 transitions. Second operand has 42 states, 42 states have (on average 2.1666666666666665) internal successors, (91), 42 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:19,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:45:19,926 INFO L93 Difference]: Finished difference Result 126 states and 135 transitions. [2021-11-09 10:45:19,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-11-09 10:45:19,927 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.1666666666666665) internal successors, (91), 42 states have internal predecessors, (91), 0 states have call successors, (0), 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 100 [2021-11-09 10:45:19,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:45:19,928 INFO L225 Difference]: With dead ends: 126 [2021-11-09 10:45:19,928 INFO L226 Difference]: Without dead ends: 103 [2021-11-09 10:45:19,928 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2021-11-09 10:45:19,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-11-09 10:45:19,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2021-11-09 10:45:19,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.0490196078431373) internal successors, (107), 102 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:19,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 107 transitions. [2021-11-09 10:45:19,942 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 107 transitions. Word has length 100 [2021-11-09 10:45:19,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:45:19,943 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 107 transitions. [2021-11-09 10:45:19,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.1666666666666665) internal successors, (91), 42 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:19,943 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 107 transitions. [2021-11-09 10:45:19,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-09 10:45:19,944 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:45:19,944 INFO L513 BasicCegarLoop]: trace histogram [42, 39, 11, 3, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:45:19,968 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-11-09 10:45:20,168 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:45:20,168 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:45:20,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:45:20,169 INFO L85 PathProgramCache]: Analyzing trace with hash -1035200286, now seen corresponding path program 38 times [2021-11-09 10:45:20,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:45:20,169 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758146385] [2021-11-09 10:45:20,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:45:20,169 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:45:20,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:45:20,853 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 200 proven. 1560 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-11-09 10:45:20,853 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:45:20,853 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758146385] [2021-11-09 10:45:20,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758146385] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:45:20,854 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870401745] [2021-11-09 10:45:20,854 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 10:45:20,854 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:45:20,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:45:20,855 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:45:20,856 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-11-09 10:45:21,664 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 10:45:21,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:45:21,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-09 10:45:21,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:45:21,956 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 200 proven. 1560 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-11-09 10:45:21,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870401745] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:45:21,957 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:45:21,957 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2021-11-09 10:45:21,957 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857016271] [2021-11-09 10:45:21,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-11-09 10:45:21,958 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:45:21,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-11-09 10:45:21,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2021-11-09 10:45:21,959 INFO L87 Difference]: Start difference. First operand 103 states and 107 transitions. Second operand has 43 states, 43 states have (on average 2.1627906976744184) internal successors, (93), 43 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:22,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:45:22,063 INFO L93 Difference]: Finished difference Result 128 states and 137 transitions. [2021-11-09 10:45:22,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-11-09 10:45:22,064 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.1627906976744184) internal successors, (93), 43 states have internal predecessors, (93), 0 states have call successors, (0), 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 102 [2021-11-09 10:45:22,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:45:22,064 INFO L225 Difference]: With dead ends: 128 [2021-11-09 10:45:22,064 INFO L226 Difference]: Without dead ends: 105 [2021-11-09 10:45:22,065 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2021-11-09 10:45:22,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-11-09 10:45:22,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2021-11-09 10:45:22,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.0480769230769231) internal successors, (109), 104 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:22,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 109 transitions. [2021-11-09 10:45:22,072 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 109 transitions. Word has length 102 [2021-11-09 10:45:22,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:45:22,072 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 109 transitions. [2021-11-09 10:45:22,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.1627906976744184) internal successors, (93), 43 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:22,073 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 109 transitions. [2021-11-09 10:45:22,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-09 10:45:22,074 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:45:22,074 INFO L513 BasicCegarLoop]: trace histogram [43, 40, 11, 3, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:45:22,113 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-11-09 10:45:22,297 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-11-09 10:45:22,297 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:45:22,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:45:22,298 INFO L85 PathProgramCache]: Analyzing trace with hash -775075835, now seen corresponding path program 39 times [2021-11-09 10:45:22,298 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:45:22,298 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476010142] [2021-11-09 10:45:22,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:45:22,298 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:45:22,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:45:23,114 INFO L134 CoverageAnalysis]: Checked inductivity of 1915 backedges. 205 proven. 1640 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-11-09 10:45:23,115 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:45:23,115 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476010142] [2021-11-09 10:45:23,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476010142] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:45:23,115 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064192393] [2021-11-09 10:45:23,115 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 10:45:23,115 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:45:23,115 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:45:23,116 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:45:23,117 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-11-09 10:45:23,942 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-11-09 10:45:23,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:45:23,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-09 10:45:23,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:45:24,795 INFO L134 CoverageAnalysis]: Checked inductivity of 1915 backedges. 209 proven. 66 refuted. 0 times theorem prover too weak. 1640 trivial. 0 not checked. [2021-11-09 10:45:24,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064192393] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:45:24,796 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:45:24,796 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 14] total 55 [2021-11-09 10:45:24,796 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585075490] [2021-11-09 10:45:24,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-11-09 10:45:24,797 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:45:24,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-11-09 10:45:24,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=993, Invalid=1977, Unknown=0, NotChecked=0, Total=2970 [2021-11-09 10:45:24,798 INFO L87 Difference]: Start difference. First operand 105 states and 109 transitions. Second operand has 55 states, 55 states have (on average 2.0545454545454547) internal successors, (113), 55 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:26,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:45:26,016 INFO L93 Difference]: Finished difference Result 143 states and 159 transitions. [2021-11-09 10:45:26,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-11-09 10:45:26,017 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.0545454545454547) internal successors, (113), 55 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 104 [2021-11-09 10:45:26,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:45:26,018 INFO L225 Difference]: With dead ends: 143 [2021-11-09 10:45:26,018 INFO L226 Difference]: Without dead ends: 120 [2021-11-09 10:45:26,019 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1430 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=3125, Invalid=5995, Unknown=0, NotChecked=0, Total=9120 [2021-11-09 10:45:26,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-11-09 10:45:26,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 108. [2021-11-09 10:45:26,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 1.0467289719626167) internal successors, (112), 107 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:26,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 112 transitions. [2021-11-09 10:45:26,028 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 112 transitions. Word has length 104 [2021-11-09 10:45:26,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:45:26,028 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 112 transitions. [2021-11-09 10:45:26,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.0545454545454547) internal successors, (113), 55 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:26,029 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 112 transitions. [2021-11-09 10:45:26,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-11-09 10:45:26,030 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:45:26,030 INFO L513 BasicCegarLoop]: trace histogram [44, 41, 12, 3, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:45:26,071 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-11-09 10:45:26,252 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-11-09 10:45:26,252 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:45:26,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:45:26,252 INFO L85 PathProgramCache]: Analyzing trace with hash -1304331260, now seen corresponding path program 40 times [2021-11-09 10:45:26,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:45:26,253 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941356078] [2021-11-09 10:45:26,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:45:26,253 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:45:26,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:45:27,139 INFO L134 CoverageAnalysis]: Checked inductivity of 2014 backedges. 210 proven. 1722 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-09 10:45:27,140 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:45:27,140 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941356078] [2021-11-09 10:45:27,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941356078] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:45:27,140 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008621139] [2021-11-09 10:45:27,140 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 10:45:27,140 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:45:27,140 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:45:27,141 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:45:27,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-11-09 10:45:28,057 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 10:45:28,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:45:28,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 43 conjunts are in the unsatisfiable core [2021-11-09 10:45:28,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:45:28,369 INFO L134 CoverageAnalysis]: Checked inductivity of 2014 backedges. 210 proven. 1722 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-09 10:45:28,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1008621139] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:45:28,369 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:45:28,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 45 [2021-11-09 10:45:28,370 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042464119] [2021-11-09 10:45:28,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-11-09 10:45:28,371 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:45:28,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-11-09 10:45:28,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2021-11-09 10:45:28,372 INFO L87 Difference]: Start difference. First operand 108 states and 112 transitions. Second operand has 45 states, 45 states have (on average 2.1555555555555554) internal successors, (97), 45 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:28,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:45:28,502 INFO L93 Difference]: Finished difference Result 134 states and 143 transitions. [2021-11-09 10:45:28,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-11-09 10:45:28,502 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.1555555555555554) internal successors, (97), 45 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 107 [2021-11-09 10:45:28,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:45:28,503 INFO L225 Difference]: With dead ends: 134 [2021-11-09 10:45:28,504 INFO L226 Difference]: Without dead ends: 110 [2021-11-09 10:45:28,504 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2021-11-09 10:45:28,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-11-09 10:45:28,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2021-11-09 10:45:28,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 1.0458715596330275) internal successors, (114), 109 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:28,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 114 transitions. [2021-11-09 10:45:28,517 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 114 transitions. Word has length 107 [2021-11-09 10:45:28,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:45:28,518 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 114 transitions. [2021-11-09 10:45:28,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.1555555555555554) internal successors, (97), 45 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:28,518 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 114 transitions. [2021-11-09 10:45:28,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-09 10:45:28,519 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:45:28,519 INFO L513 BasicCegarLoop]: trace histogram [45, 42, 12, 3, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:45:28,563 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-11-09 10:45:28,732 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:45:28,732 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:45:28,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:45:28,732 INFO L85 PathProgramCache]: Analyzing trace with hash -1696642367, now seen corresponding path program 41 times [2021-11-09 10:45:28,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:45:28,732 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315574463] [2021-11-09 10:45:28,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:45:28,733 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:45:28,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:45:29,596 INFO L134 CoverageAnalysis]: Checked inductivity of 2103 backedges. 215 proven. 1806 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-09 10:45:29,596 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:45:29,596 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315574463] [2021-11-09 10:45:29,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315574463] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:45:29,597 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655351065] [2021-11-09 10:45:29,597 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 10:45:29,597 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:45:29,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:45:29,598 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:45:29,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-11-09 10:45:30,549 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2021-11-09 10:45:30,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:45:30,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-09 10:45:30,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:45:30,887 INFO L134 CoverageAnalysis]: Checked inductivity of 2103 backedges. 215 proven. 1806 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-09 10:45:30,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655351065] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:45:30,887 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:45:30,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 46 [2021-11-09 10:45:30,888 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619176876] [2021-11-09 10:45:30,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-11-09 10:45:30,888 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:45:30,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-11-09 10:45:30,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2021-11-09 10:45:30,889 INFO L87 Difference]: Start difference. First operand 110 states and 114 transitions. Second operand has 46 states, 46 states have (on average 2.152173913043478) internal successors, (99), 46 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:31,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:45:31,023 INFO L93 Difference]: Finished difference Result 136 states and 145 transitions. [2021-11-09 10:45:31,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-11-09 10:45:31,024 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.152173913043478) internal successors, (99), 46 states have internal predecessors, (99), 0 states have call successors, (0), 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 109 [2021-11-09 10:45:31,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:45:31,025 INFO L225 Difference]: With dead ends: 136 [2021-11-09 10:45:31,025 INFO L226 Difference]: Without dead ends: 112 [2021-11-09 10:45:31,026 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2021-11-09 10:45:31,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-11-09 10:45:31,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2021-11-09 10:45:31,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 1.045045045045045) internal successors, (116), 111 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:31,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 116 transitions. [2021-11-09 10:45:31,038 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 116 transitions. Word has length 109 [2021-11-09 10:45:31,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:45:31,038 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 116 transitions. [2021-11-09 10:45:31,039 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.152173913043478) internal successors, (99), 46 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:31,039 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 116 transitions. [2021-11-09 10:45:31,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-09 10:45:31,040 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:45:31,040 INFO L513 BasicCegarLoop]: trace histogram [46, 43, 12, 3, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:45:31,065 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-11-09 10:45:31,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-11-09 10:45:31,240 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:45:31,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:45:31,241 INFO L85 PathProgramCache]: Analyzing trace with hash -750494146, now seen corresponding path program 42 times [2021-11-09 10:45:31,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:45:31,241 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053217235] [2021-11-09 10:45:31,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:45:31,241 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:45:31,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:45:32,084 INFO L134 CoverageAnalysis]: Checked inductivity of 2194 backedges. 220 proven. 1892 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-09 10:45:32,085 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:45:32,085 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053217235] [2021-11-09 10:45:32,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053217235] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:45:32,085 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966608945] [2021-11-09 10:45:32,085 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 10:45:32,085 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:45:32,086 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:45:32,086 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:45:32,105 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-11-09 10:45:33,142 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-11-09 10:45:33,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:45:33,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-09 10:45:33,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:45:34,036 INFO L134 CoverageAnalysis]: Checked inductivity of 2194 backedges. 224 proven. 78 refuted. 0 times theorem prover too weak. 1892 trivial. 0 not checked. [2021-11-09 10:45:34,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966608945] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:45:34,036 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:45:34,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 15] total 59 [2021-11-09 10:45:34,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131645559] [2021-11-09 10:45:34,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-11-09 10:45:34,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:45:34,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-11-09 10:45:34,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1139, Invalid=2283, Unknown=0, NotChecked=0, Total=3422 [2021-11-09 10:45:34,038 INFO L87 Difference]: Start difference. First operand 112 states and 116 transitions. Second operand has 59 states, 59 states have (on average 2.0338983050847457) internal successors, (120), 59 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:35,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:45:35,433 INFO L93 Difference]: Finished difference Result 151 states and 167 transitions. [2021-11-09 10:45:35,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-11-09 10:45:35,434 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.0338983050847457) internal successors, (120), 59 states have internal predecessors, (120), 0 states have call successors, (0), 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 111 [2021-11-09 10:45:35,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:45:35,435 INFO L225 Difference]: With dead ends: 151 [2021-11-09 10:45:35,435 INFO L226 Difference]: Without dead ends: 127 [2021-11-09 10:45:35,437 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1647 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=3603, Invalid=6903, Unknown=0, NotChecked=0, Total=10506 [2021-11-09 10:45:35,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-11-09 10:45:35,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 115. [2021-11-09 10:45:35,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.043859649122807) internal successors, (119), 114 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:35,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 119 transitions. [2021-11-09 10:45:35,448 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 119 transitions. Word has length 111 [2021-11-09 10:45:35,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:45:35,448 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 119 transitions. [2021-11-09 10:45:35,449 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.0338983050847457) internal successors, (120), 59 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:35,449 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 119 transitions. [2021-11-09 10:45:35,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-09 10:45:35,450 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:45:35,450 INFO L513 BasicCegarLoop]: trace histogram [47, 44, 13, 3, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:45:35,487 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-11-09 10:45:35,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:45:35,672 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:45:35,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:45:35,672 INFO L85 PathProgramCache]: Analyzing trace with hash 1337438801, now seen corresponding path program 43 times [2021-11-09 10:45:35,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:45:35,672 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24668624] [2021-11-09 10:45:35,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:45:35,673 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:45:35,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:45:36,651 INFO L134 CoverageAnalysis]: Checked inductivity of 2300 backedges. 225 proven. 1980 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-11-09 10:45:36,651 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:45:36,651 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24668624] [2021-11-09 10:45:36,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24668624] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:45:36,651 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558908468] [2021-11-09 10:45:36,651 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 10:45:36,652 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:45:36,652 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:45:36,652 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:45:36,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-11-09 10:45:37,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:45:37,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-09 10:45:37,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:45:38,100 INFO L134 CoverageAnalysis]: Checked inductivity of 2300 backedges. 225 proven. 1980 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-11-09 10:45:38,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558908468] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:45:38,101 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:45:38,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 48 [2021-11-09 10:45:38,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011157356] [2021-11-09 10:45:38,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-09 10:45:38,102 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:45:38,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-09 10:45:38,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2021-11-09 10:45:38,103 INFO L87 Difference]: Start difference. First operand 115 states and 119 transitions. Second operand has 48 states, 48 states have (on average 2.1458333333333335) internal successors, (103), 48 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:38,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:45:38,237 INFO L93 Difference]: Finished difference Result 142 states and 151 transitions. [2021-11-09 10:45:38,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-11-09 10:45:38,238 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.1458333333333335) internal successors, (103), 48 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) Word has length 114 [2021-11-09 10:45:38,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:45:38,239 INFO L225 Difference]: With dead ends: 142 [2021-11-09 10:45:38,239 INFO L226 Difference]: Without dead ends: 117 [2021-11-09 10:45:38,240 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2021-11-09 10:45:38,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-11-09 10:45:38,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2021-11-09 10:45:38,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.043103448275862) internal successors, (121), 116 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:38,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 121 transitions. [2021-11-09 10:45:38,250 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 121 transitions. Word has length 114 [2021-11-09 10:45:38,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:45:38,250 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 121 transitions. [2021-11-09 10:45:38,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.1458333333333335) internal successors, (103), 48 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:38,251 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 121 transitions. [2021-11-09 10:45:38,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-09 10:45:38,251 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:45:38,252 INFO L513 BasicCegarLoop]: trace histogram [48, 45, 13, 3, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:45:38,289 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2021-11-09 10:45:38,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-11-09 10:45:38,468 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:45:38,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:45:38,468 INFO L85 PathProgramCache]: Analyzing trace with hash -808172300, now seen corresponding path program 44 times [2021-11-09 10:45:38,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:45:38,468 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701062993] [2021-11-09 10:45:38,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:45:38,469 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:45:38,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:45:39,598 INFO L134 CoverageAnalysis]: Checked inductivity of 2395 backedges. 230 proven. 2070 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-11-09 10:45:39,598 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:45:39,598 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701062993] [2021-11-09 10:45:39,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701062993] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:45:39,598 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121818123] [2021-11-09 10:45:39,598 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 10:45:39,598 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:45:39,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:45:39,602 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:45:39,602 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-11-09 10:45:40,803 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 10:45:40,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:45:40,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 47 conjunts are in the unsatisfiable core [2021-11-09 10:45:40,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:45:41,153 INFO L134 CoverageAnalysis]: Checked inductivity of 2395 backedges. 230 proven. 2070 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-11-09 10:45:41,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121818123] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:45:41,154 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:45:41,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 49 [2021-11-09 10:45:41,154 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706146573] [2021-11-09 10:45:41,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-11-09 10:45:41,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:45:41,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-11-09 10:45:41,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2021-11-09 10:45:41,155 INFO L87 Difference]: Start difference. First operand 117 states and 121 transitions. Second operand has 49 states, 49 states have (on average 2.142857142857143) internal successors, (105), 49 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:41,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:45:41,276 INFO L93 Difference]: Finished difference Result 144 states and 153 transitions. [2021-11-09 10:45:41,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-09 10:45:41,276 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.142857142857143) internal successors, (105), 49 states have internal predecessors, (105), 0 states have call successors, (0), 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 116 [2021-11-09 10:45:41,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:45:41,277 INFO L225 Difference]: With dead ends: 144 [2021-11-09 10:45:41,277 INFO L226 Difference]: Without dead ends: 119 [2021-11-09 10:45:41,278 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2021-11-09 10:45:41,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-11-09 10:45:41,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2021-11-09 10:45:41,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 1.0423728813559323) internal successors, (123), 118 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:41,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 123 transitions. [2021-11-09 10:45:41,290 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 123 transitions. Word has length 116 [2021-11-09 10:45:41,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:45:41,291 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 123 transitions. [2021-11-09 10:45:41,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.142857142857143) internal successors, (105), 49 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:41,291 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 123 transitions. [2021-11-09 10:45:41,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-09 10:45:41,292 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:45:41,292 INFO L513 BasicCegarLoop]: trace histogram [49, 46, 13, 3, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:45:41,338 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2021-11-09 10:45:41,505 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-11-09 10:45:41,505 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:45:41,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:45:41,506 INFO L85 PathProgramCache]: Analyzing trace with hash -1156138281, now seen corresponding path program 45 times [2021-11-09 10:45:41,506 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:45:41,506 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933182578] [2021-11-09 10:45:41,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:45:41,506 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:45:41,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:45:42,635 INFO L134 CoverageAnalysis]: Checked inductivity of 2492 backedges. 235 proven. 2162 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-11-09 10:45:42,635 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:45:42,635 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933182578] [2021-11-09 10:45:42,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933182578] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:45:42,636 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140278618] [2021-11-09 10:45:42,636 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 10:45:42,636 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:45:42,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:45:42,638 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:45:42,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-11-09 10:45:43,924 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-09 10:45:43,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:45:43,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-09 10:45:43,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:45:44,928 INFO L134 CoverageAnalysis]: Checked inductivity of 2492 backedges. 239 proven. 91 refuted. 0 times theorem prover too weak. 2162 trivial. 0 not checked. [2021-11-09 10:45:44,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140278618] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:45:44,928 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:45:44,928 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 16] total 63 [2021-11-09 10:45:44,928 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940437034] [2021-11-09 10:45:44,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2021-11-09 10:45:44,929 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:45:44,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-11-09 10:45:44,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1295, Invalid=2611, Unknown=0, NotChecked=0, Total=3906 [2021-11-09 10:45:44,930 INFO L87 Difference]: Start difference. First operand 119 states and 123 transitions. Second operand has 63 states, 63 states have (on average 2.015873015873016) internal successors, (127), 63 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:46,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:45:46,286 INFO L93 Difference]: Finished difference Result 159 states and 175 transitions. [2021-11-09 10:45:46,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-11-09 10:45:46,286 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.015873015873016) internal successors, (127), 63 states have internal predecessors, (127), 0 states have call successors, (0), 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 118 [2021-11-09 10:45:46,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:45:46,287 INFO L225 Difference]: With dead ends: 159 [2021-11-09 10:45:46,287 INFO L226 Difference]: Without dead ends: 134 [2021-11-09 10:45:46,288 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1879 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=4115, Invalid=7875, Unknown=0, NotChecked=0, Total=11990 [2021-11-09 10:45:46,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-11-09 10:45:46,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 122. [2021-11-09 10:45:46,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 1.0413223140495869) internal successors, (126), 121 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:46,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 126 transitions. [2021-11-09 10:45:46,299 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 126 transitions. Word has length 118 [2021-11-09 10:45:46,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:45:46,300 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 126 transitions. [2021-11-09 10:45:46,300 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.015873015873016) internal successors, (127), 63 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:46,300 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 126 transitions. [2021-11-09 10:45:46,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-09 10:45:46,301 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:45:46,301 INFO L513 BasicCegarLoop]: trace histogram [50, 47, 14, 3, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:45:46,334 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2021-11-09 10:45:46,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-11-09 10:45:46,520 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:45:46,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:45:46,520 INFO L85 PathProgramCache]: Analyzing trace with hash 317629618, now seen corresponding path program 46 times [2021-11-09 10:45:46,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:45:46,521 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910003790] [2021-11-09 10:45:46,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:45:46,521 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:45:46,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:45:47,542 INFO L134 CoverageAnalysis]: Checked inductivity of 2605 backedges. 240 proven. 2256 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-09 10:45:47,542 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:45:47,542 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910003790] [2021-11-09 10:45:47,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910003790] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:45:47,542 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101025286] [2021-11-09 10:45:47,543 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 10:45:47,543 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:45:47,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:45:47,547 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:45:47,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-11-09 10:45:48,801 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 10:45:48,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:45:48,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-09 10:45:48,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:45:49,122 INFO L134 CoverageAnalysis]: Checked inductivity of 2605 backedges. 240 proven. 2256 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-09 10:45:49,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101025286] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:45:49,122 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:45:49,123 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 51 [2021-11-09 10:45:49,123 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665802777] [2021-11-09 10:45:49,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-11-09 10:45:49,123 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:45:49,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-11-09 10:45:49,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2021-11-09 10:45:49,125 INFO L87 Difference]: Start difference. First operand 122 states and 126 transitions. Second operand has 51 states, 51 states have (on average 2.1372549019607843) internal successors, (109), 51 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:49,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:45:49,275 INFO L93 Difference]: Finished difference Result 150 states and 159 transitions. [2021-11-09 10:45:49,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-11-09 10:45:49,276 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.1372549019607843) internal successors, (109), 51 states have internal predecessors, (109), 0 states have call successors, (0), 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 121 [2021-11-09 10:45:49,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:45:49,277 INFO L225 Difference]: With dead ends: 150 [2021-11-09 10:45:49,277 INFO L226 Difference]: Without dead ends: 124 [2021-11-09 10:45:49,277 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2021-11-09 10:45:49,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-11-09 10:45:49,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2021-11-09 10:45:49,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 1.0406504065040652) internal successors, (128), 123 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:49,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 128 transitions. [2021-11-09 10:45:49,289 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 128 transitions. Word has length 121 [2021-11-09 10:45:49,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:45:49,290 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 128 transitions. [2021-11-09 10:45:49,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.1372549019607843) internal successors, (109), 51 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:49,290 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 128 transitions. [2021-11-09 10:45:49,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-09 10:45:49,291 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:45:49,292 INFO L513 BasicCegarLoop]: trace histogram [51, 48, 14, 3, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:45:49,338 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2021-11-09 10:45:49,516 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:45:49,516 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:45:49,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:45:49,516 INFO L85 PathProgramCache]: Analyzing trace with hash 189359279, now seen corresponding path program 47 times [2021-11-09 10:45:49,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:45:49,517 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972705069] [2021-11-09 10:45:49,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:45:49,517 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:45:49,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:45:50,645 INFO L134 CoverageAnalysis]: Checked inductivity of 2706 backedges. 245 proven. 2352 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-09 10:45:50,645 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:45:50,646 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972705069] [2021-11-09 10:45:50,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972705069] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:45:50,646 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080488855] [2021-11-09 10:45:50,646 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 10:45:50,646 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:45:50,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:45:50,648 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:45:50,649 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-11-09 10:45:51,981 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 52 check-sat command(s) [2021-11-09 10:45:51,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:45:51,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 50 conjunts are in the unsatisfiable core [2021-11-09 10:45:51,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:45:52,348 INFO L134 CoverageAnalysis]: Checked inductivity of 2706 backedges. 245 proven. 2352 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-09 10:45:52,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080488855] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:45:52,348 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:45:52,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 52 [2021-11-09 10:45:52,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514711278] [2021-11-09 10:45:52,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-11-09 10:45:52,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:45:52,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-11-09 10:45:52,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2021-11-09 10:45:52,350 INFO L87 Difference]: Start difference. First operand 124 states and 128 transitions. Second operand has 52 states, 52 states have (on average 2.1346153846153846) internal successors, (111), 52 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:52,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:45:52,512 INFO L93 Difference]: Finished difference Result 152 states and 161 transitions. [2021-11-09 10:45:52,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-11-09 10:45:52,513 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.1346153846153846) internal successors, (111), 52 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 123 [2021-11-09 10:45:52,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:45:52,514 INFO L225 Difference]: With dead ends: 152 [2021-11-09 10:45:52,515 INFO L226 Difference]: Without dead ends: 126 [2021-11-09 10:45:52,515 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2021-11-09 10:45:52,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-11-09 10:45:52,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2021-11-09 10:45:52,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 1.04) internal successors, (130), 125 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:52,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 130 transitions. [2021-11-09 10:45:52,526 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 130 transitions. Word has length 123 [2021-11-09 10:45:52,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:45:52,527 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 130 transitions. [2021-11-09 10:45:52,527 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.1346153846153846) internal successors, (111), 52 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:52,527 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 130 transitions. [2021-11-09 10:45:52,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-09 10:45:52,528 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:45:52,528 INFO L513 BasicCegarLoop]: trace histogram [52, 49, 14, 3, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:45:52,558 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2021-11-09 10:45:52,740 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:45:52,740 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:45:52,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:45:52,741 INFO L85 PathProgramCache]: Analyzing trace with hash 1475615084, now seen corresponding path program 48 times [2021-11-09 10:45:52,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:45:52,741 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691779717] [2021-11-09 10:45:52,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:45:52,742 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:45:52,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:45:53,894 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 250 proven. 2450 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-09 10:45:53,894 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:45:53,895 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691779717] [2021-11-09 10:45:53,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691779717] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:45:53,895 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142326571] [2021-11-09 10:45:53,895 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 10:45:53,895 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:45:53,895 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:45:53,896 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:45:53,898 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-11-09 10:45:55,368 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-11-09 10:45:55,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:45:55,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-09 10:45:55,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:45:56,541 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 254 proven. 105 refuted. 0 times theorem prover too weak. 2450 trivial. 0 not checked. [2021-11-09 10:45:56,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142326571] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:45:56,542 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:45:56,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 17] total 67 [2021-11-09 10:45:56,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798374445] [2021-11-09 10:45:56,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2021-11-09 10:45:56,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:45:56,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-11-09 10:45:56,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1461, Invalid=2961, Unknown=0, NotChecked=0, Total=4422 [2021-11-09 10:45:56,545 INFO L87 Difference]: Start difference. First operand 126 states and 130 transitions. Second operand has 67 states, 67 states have (on average 2.0) internal successors, (134), 67 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) [2021-11-09 10:45:58,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:45:58,020 INFO L93 Difference]: Finished difference Result 167 states and 183 transitions. [2021-11-09 10:45:58,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-11-09 10:45:58,020 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.0) internal successors, (134), 67 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) Word has length 125 [2021-11-09 10:45:58,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:45:58,022 INFO L225 Difference]: With dead ends: 167 [2021-11-09 10:45:58,022 INFO L226 Difference]: Without dead ends: 141 [2021-11-09 10:45:58,024 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2126 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=4661, Invalid=8911, Unknown=0, NotChecked=0, Total=13572 [2021-11-09 10:45:58,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-11-09 10:45:58,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 129. [2021-11-09 10:45:58,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 1.0390625) internal successors, (133), 128 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) [2021-11-09 10:45:58,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 133 transitions. [2021-11-09 10:45:58,035 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 133 transitions. Word has length 125 [2021-11-09 10:45:58,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:45:58,035 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 133 transitions. [2021-11-09 10:45:58,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 2.0) internal successors, (134), 67 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) [2021-11-09 10:45:58,036 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 133 transitions. [2021-11-09 10:45:58,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-09 10:45:58,037 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:45:58,037 INFO L513 BasicCegarLoop]: trace histogram [53, 50, 15, 3, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:45:58,078 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2021-11-09 10:45:58,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-11-09 10:45:58,264 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:45:58,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:45:58,264 INFO L85 PathProgramCache]: Analyzing trace with hash 1944531875, now seen corresponding path program 49 times [2021-11-09 10:45:58,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:45:58,265 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342723632] [2021-11-09 10:45:58,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:45:58,265 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:45:58,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:45:59,679 INFO L134 CoverageAnalysis]: Checked inductivity of 2929 backedges. 255 proven. 2550 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2021-11-09 10:45:59,679 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:45:59,680 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342723632] [2021-11-09 10:45:59,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342723632] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:45:59,680 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324797666] [2021-11-09 10:45:59,680 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 10:45:59,680 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:45:59,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:45:59,683 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:45:59,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-11-09 10:46:01,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:01,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 52 conjunts are in the unsatisfiable core [2021-11-09 10:46:01,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:46:01,424 INFO L134 CoverageAnalysis]: Checked inductivity of 2929 backedges. 255 proven. 2550 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2021-11-09 10:46:01,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324797666] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:46:01,425 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:46:01,425 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 54 [2021-11-09 10:46:01,425 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975238734] [2021-11-09 10:46:01,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-11-09 10:46:01,426 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:46:01,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-11-09 10:46:01,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2021-11-09 10:46:01,428 INFO L87 Difference]: Start difference. First operand 129 states and 133 transitions. Second operand has 54 states, 54 states have (on average 2.1296296296296298) internal successors, (115), 54 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:01,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:46:01,620 INFO L93 Difference]: Finished difference Result 158 states and 167 transitions. [2021-11-09 10:46:01,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-11-09 10:46:01,621 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.1296296296296298) internal successors, (115), 54 states have internal predecessors, (115), 0 states have call successors, (0), 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 128 [2021-11-09 10:46:01,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:46:01,622 INFO L225 Difference]: With dead ends: 158 [2021-11-09 10:46:01,622 INFO L226 Difference]: Without dead ends: 131 [2021-11-09 10:46:01,622 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2021-11-09 10:46:01,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-11-09 10:46:01,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2021-11-09 10:46:01,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 1.0384615384615385) internal successors, (135), 130 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:01,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 135 transitions. [2021-11-09 10:46:01,635 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 135 transitions. Word has length 128 [2021-11-09 10:46:01,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:46:01,635 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 135 transitions. [2021-11-09 10:46:01,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.1296296296296298) internal successors, (115), 54 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:01,636 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 135 transitions. [2021-11-09 10:46:01,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-09 10:46:01,637 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:46:01,637 INFO L513 BasicCegarLoop]: trace histogram [54, 51, 15, 3, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:46:01,672 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2021-11-09 10:46:01,852 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:46:01,852 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:46:01,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:46:01,852 INFO L85 PathProgramCache]: Analyzing trace with hash -330240762, now seen corresponding path program 50 times [2021-11-09 10:46:01,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:46:01,852 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094089045] [2021-11-09 10:46:01,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:46:01,852 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:46:01,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:03,227 INFO L134 CoverageAnalysis]: Checked inductivity of 3036 backedges. 260 proven. 2652 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2021-11-09 10:46:03,228 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:46:03,228 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094089045] [2021-11-09 10:46:03,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094089045] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:46:03,228 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2597308] [2021-11-09 10:46:03,228 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 10:46:03,228 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:46:03,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:46:03,229 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:46:03,257 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-11-09 10:46:04,777 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 10:46:04,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:46:04,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 53 conjunts are in the unsatisfiable core [2021-11-09 10:46:04,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:46:05,172 INFO L134 CoverageAnalysis]: Checked inductivity of 3036 backedges. 260 proven. 2652 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2021-11-09 10:46:05,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2597308] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:46:05,173 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:46:05,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 55 [2021-11-09 10:46:05,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394021495] [2021-11-09 10:46:05,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-11-09 10:46:05,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:46:05,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-11-09 10:46:05,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2021-11-09 10:46:05,175 INFO L87 Difference]: Start difference. First operand 131 states and 135 transitions. Second operand has 55 states, 55 states have (on average 2.1272727272727274) internal successors, (117), 55 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:05,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:46:05,327 INFO L93 Difference]: Finished difference Result 160 states and 169 transitions. [2021-11-09 10:46:05,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-11-09 10:46:05,327 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.1272727272727274) internal successors, (117), 55 states have internal predecessors, (117), 0 states have call successors, (0), 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 130 [2021-11-09 10:46:05,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:46:05,333 INFO L225 Difference]: With dead ends: 160 [2021-11-09 10:46:05,333 INFO L226 Difference]: Without dead ends: 133 [2021-11-09 10:46:05,333 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2021-11-09 10:46:05,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-11-09 10:46:05,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2021-11-09 10:46:05,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 1.0378787878787878) internal successors, (137), 132 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:05,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 137 transitions. [2021-11-09 10:46:05,348 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 137 transitions. Word has length 130 [2021-11-09 10:46:05,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:46:05,349 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 137 transitions. [2021-11-09 10:46:05,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.1272727272727274) internal successors, (117), 55 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:05,349 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 137 transitions. [2021-11-09 10:46:05,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-09 10:46:05,350 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:46:05,351 INFO L513 BasicCegarLoop]: trace histogram [55, 52, 15, 3, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:46:05,399 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2021-11-09 10:46:05,565 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:46:05,566 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:46:05,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:46:05,566 INFO L85 PathProgramCache]: Analyzing trace with hash -248391255, now seen corresponding path program 51 times [2021-11-09 10:46:05,566 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:46:05,566 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394865446] [2021-11-09 10:46:05,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:46:05,567 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:46:05,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:06,758 INFO L134 CoverageAnalysis]: Checked inductivity of 3145 backedges. 265 proven. 2756 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2021-11-09 10:46:06,759 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:46:06,759 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394865446] [2021-11-09 10:46:06,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394865446] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:46:06,759 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950388577] [2021-11-09 10:46:06,759 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 10:46:06,760 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:46:06,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:46:06,768 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:46:06,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-11-09 10:46:08,276 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-09 10:46:08,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:46:08,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-09 10:46:08,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:46:08,703 INFO L134 CoverageAnalysis]: Checked inductivity of 3145 backedges. 364 proven. 9 refuted. 0 times theorem prover too weak. 2772 trivial. 0 not checked. [2021-11-09 10:46:08,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950388577] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:46:08,704 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:46:08,704 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 6] total 59 [2021-11-09 10:46:08,704 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148562231] [2021-11-09 10:46:08,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-11-09 10:46:08,704 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:46:08,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-11-09 10:46:08,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2021-11-09 10:46:08,706 INFO L87 Difference]: Start difference. First operand 133 states and 137 transitions. Second operand has 59 states, 59 states have (on average 2.152542372881356) internal successors, (127), 59 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:08,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:46:08,873 INFO L93 Difference]: Finished difference Result 165 states and 177 transitions. [2021-11-09 10:46:08,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-11-09 10:46:08,873 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.152542372881356) internal successors, (127), 59 states have internal predecessors, (127), 0 states have call successors, (0), 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 132 [2021-11-09 10:46:08,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:46:08,874 INFO L225 Difference]: With dead ends: 165 [2021-11-09 10:46:08,874 INFO L226 Difference]: Without dead ends: 138 [2021-11-09 10:46:08,875 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2021-11-09 10:46:08,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-11-09 10:46:08,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 137. [2021-11-09 10:46:08,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 1.0441176470588236) internal successors, (142), 136 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:08,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 142 transitions. [2021-11-09 10:46:08,887 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 142 transitions. Word has length 132 [2021-11-09 10:46:08,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:46:08,888 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 142 transitions. [2021-11-09 10:46:08,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.152542372881356) internal successors, (127), 59 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:08,888 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 142 transitions. [2021-11-09 10:46:08,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-11-09 10:46:08,889 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:46:08,889 INFO L513 BasicCegarLoop]: trace histogram [57, 53, 15, 4, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:46:08,924 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2021-11-09 10:46:09,102 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-11-09 10:46:09,103 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:46:09,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:46:09,103 INFO L85 PathProgramCache]: Analyzing trace with hash 1336946225, now seen corresponding path program 52 times [2021-11-09 10:46:09,103 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:46:09,103 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864231069] [2021-11-09 10:46:09,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:46:09,104 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:46:09,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:10,419 INFO L134 CoverageAnalysis]: Checked inductivity of 3369 backedges. 378 proven. 2862 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2021-11-09 10:46:10,420 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:46:10,420 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864231069] [2021-11-09 10:46:10,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864231069] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:46:10,420 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514846729] [2021-11-09 10:46:10,420 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 10:46:10,420 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:46:10,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:46:10,421 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:46:10,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-11-09 10:46:11,874 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 10:46:11,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:46:11,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 55 conjunts are in the unsatisfiable core [2021-11-09 10:46:11,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:46:12,248 INFO L134 CoverageAnalysis]: Checked inductivity of 3369 backedges. 378 proven. 2862 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2021-11-09 10:46:12,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [514846729] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:46:12,248 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:46:12,248 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 57 [2021-11-09 10:46:12,248 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612949291] [2021-11-09 10:46:12,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2021-11-09 10:46:12,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:46:12,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-11-09 10:46:12,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2021-11-09 10:46:12,250 INFO L87 Difference]: Start difference. First operand 137 states and 142 transitions. Second operand has 57 states, 57 states have (on average 2.1228070175438596) internal successors, (121), 57 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:12,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:46:12,380 INFO L93 Difference]: Finished difference Result 168 states and 179 transitions. [2021-11-09 10:46:12,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-11-09 10:46:12,380 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.1228070175438596) internal successors, (121), 57 states have internal predecessors, (121), 0 states have call successors, (0), 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 136 [2021-11-09 10:46:12,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:46:12,381 INFO L225 Difference]: With dead ends: 168 [2021-11-09 10:46:12,381 INFO L226 Difference]: Without dead ends: 139 [2021-11-09 10:46:12,382 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2021-11-09 10:46:12,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-11-09 10:46:12,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2021-11-09 10:46:12,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 1.0434782608695652) internal successors, (144), 138 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:12,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 144 transitions. [2021-11-09 10:46:12,392 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 144 transitions. Word has length 136 [2021-11-09 10:46:12,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:46:12,392 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 144 transitions. [2021-11-09 10:46:12,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.1228070175438596) internal successors, (121), 57 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:12,393 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 144 transitions. [2021-11-09 10:46:12,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-11-09 10:46:12,394 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:46:12,394 INFO L513 BasicCegarLoop]: trace histogram [58, 54, 15, 4, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:46:12,428 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2021-11-09 10:46:12,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:46:12,616 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:46:12,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:46:12,616 INFO L85 PathProgramCache]: Analyzing trace with hash 432526484, now seen corresponding path program 53 times [2021-11-09 10:46:12,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:46:12,616 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084785052] [2021-11-09 10:46:12,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:46:12,617 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:46:12,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:13,985 INFO L134 CoverageAnalysis]: Checked inductivity of 3484 backedges. 385 proven. 2970 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2021-11-09 10:46:13,985 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:46:13,986 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084785052] [2021-11-09 10:46:13,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084785052] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:46:13,986 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529602464] [2021-11-09 10:46:13,986 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 10:46:13,986 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:46:13,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:46:13,992 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:46:13,993 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-11-09 10:46:15,727 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 59 check-sat command(s) [2021-11-09 10:46:15,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:46:15,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 56 conjunts are in the unsatisfiable core [2021-11-09 10:46:15,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:46:16,090 INFO L134 CoverageAnalysis]: Checked inductivity of 3484 backedges. 385 proven. 2970 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2021-11-09 10:46:16,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529602464] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:46:16,090 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:46:16,090 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 58 [2021-11-09 10:46:16,091 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240299836] [2021-11-09 10:46:16,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2021-11-09 10:46:16,091 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:46:16,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-11-09 10:46:16,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2021-11-09 10:46:16,092 INFO L87 Difference]: Start difference. First operand 139 states and 144 transitions. Second operand has 58 states, 58 states have (on average 2.1206896551724137) internal successors, (123), 58 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:16,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:46:16,241 INFO L93 Difference]: Finished difference Result 170 states and 181 transitions. [2021-11-09 10:46:16,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-11-09 10:46:16,241 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.1206896551724137) internal successors, (123), 58 states have internal predecessors, (123), 0 states have call successors, (0), 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 138 [2021-11-09 10:46:16,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:46:16,242 INFO L225 Difference]: With dead ends: 170 [2021-11-09 10:46:16,242 INFO L226 Difference]: Without dead ends: 141 [2021-11-09 10:46:16,243 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2021-11-09 10:46:16,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-11-09 10:46:16,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2021-11-09 10:46:16,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 1.042857142857143) internal successors, (146), 140 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:16,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 146 transitions. [2021-11-09 10:46:16,257 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 146 transitions. Word has length 138 [2021-11-09 10:46:16,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:46:16,258 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 146 transitions. [2021-11-09 10:46:16,258 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.1206896551724137) internal successors, (123), 58 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:16,258 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 146 transitions. [2021-11-09 10:46:16,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-11-09 10:46:16,259 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:46:16,260 INFO L513 BasicCegarLoop]: trace histogram [59, 55, 15, 4, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:46:16,290 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2021-11-09 10:46:16,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-11-09 10:46:16,464 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:46:16,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:46:16,464 INFO L85 PathProgramCache]: Analyzing trace with hash -1131450825, now seen corresponding path program 54 times [2021-11-09 10:46:16,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:46:16,465 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772669594] [2021-11-09 10:46:16,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:46:16,465 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:46:16,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:17,841 INFO L134 CoverageAnalysis]: Checked inductivity of 3601 backedges. 392 proven. 3080 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2021-11-09 10:46:17,841 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:46:17,841 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772669594] [2021-11-09 10:46:17,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772669594] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:46:17,841 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649922243] [2021-11-09 10:46:17,841 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 10:46:17,842 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:46:17,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:46:17,842 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:46:17,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-11-09 10:46:19,402 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2021-11-09 10:46:19,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:46:19,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-09 10:46:19,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:46:20,522 INFO L134 CoverageAnalysis]: Checked inductivity of 3601 backedges. 401 proven. 120 refuted. 0 times theorem prover too weak. 3080 trivial. 0 not checked. [2021-11-09 10:46:20,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649922243] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:46:20,522 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:46:20,522 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 18] total 74 [2021-11-09 10:46:20,522 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130765105] [2021-11-09 10:46:20,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2021-11-09 10:46:20,523 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:46:20,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2021-11-09 10:46:20,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1805, Invalid=3597, Unknown=0, NotChecked=0, Total=5402 [2021-11-09 10:46:20,524 INFO L87 Difference]: Start difference. First operand 141 states and 146 transitions. Second operand has 74 states, 74 states have (on average 2.0135135135135136) internal successors, (149), 74 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:22,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:46:22,323 INFO L93 Difference]: Finished difference Result 193 states and 215 transitions. [2021-11-09 10:46:22,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-11-09 10:46:22,323 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.0135135135135136) internal successors, (149), 74 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 140 [2021-11-09 10:46:22,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:46:22,324 INFO L225 Difference]: With dead ends: 193 [2021-11-09 10:46:22,324 INFO L226 Difference]: Without dead ends: 164 [2021-11-09 10:46:22,325 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2676 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=5725, Invalid=11045, Unknown=0, NotChecked=0, Total=16770 [2021-11-09 10:46:22,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-11-09 10:46:22,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 144. [2021-11-09 10:46:22,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 1.0419580419580419) internal successors, (149), 143 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:22,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 149 transitions. [2021-11-09 10:46:22,338 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 149 transitions. Word has length 140 [2021-11-09 10:46:22,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:46:22,339 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 149 transitions. [2021-11-09 10:46:22,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 2.0135135135135136) internal successors, (149), 74 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:22,339 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 149 transitions. [2021-11-09 10:46:22,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-11-09 10:46:22,340 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:46:22,341 INFO L513 BasicCegarLoop]: trace histogram [60, 56, 16, 4, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:46:22,387 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2021-11-09 10:46:22,556 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-11-09 10:46:22,556 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:46:22,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:46:22,556 INFO L85 PathProgramCache]: Analyzing trace with hash -1356357230, now seen corresponding path program 55 times [2021-11-09 10:46:22,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:46:22,557 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067279137] [2021-11-09 10:46:22,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:46:22,557 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:46:22,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:23,814 INFO L134 CoverageAnalysis]: Checked inductivity of 3736 backedges. 399 proven. 3192 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-11-09 10:46:23,814 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:46:23,815 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067279137] [2021-11-09 10:46:23,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067279137] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:46:23,815 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627442489] [2021-11-09 10:46:23,815 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 10:46:23,815 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:46:23,815 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:46:23,821 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:46:23,821 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-11-09 10:46:25,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:25,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 58 conjunts are in the unsatisfiable core [2021-11-09 10:46:25,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:46:25,861 INFO L134 CoverageAnalysis]: Checked inductivity of 3736 backedges. 399 proven. 3192 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-11-09 10:46:25,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627442489] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:46:25,861 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:46:25,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 60 [2021-11-09 10:46:25,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490858437] [2021-11-09 10:46:25,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2021-11-09 10:46:25,862 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:46:25,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-11-09 10:46:25,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2021-11-09 10:46:25,863 INFO L87 Difference]: Start difference. First operand 144 states and 149 transitions. Second operand has 60 states, 60 states have (on average 2.1166666666666667) internal successors, (127), 60 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:25,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:46:25,990 INFO L93 Difference]: Finished difference Result 176 states and 187 transitions. [2021-11-09 10:46:25,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-11-09 10:46:25,990 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.1166666666666667) internal successors, (127), 60 states have internal predecessors, (127), 0 states have call successors, (0), 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 143 [2021-11-09 10:46:25,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:46:25,991 INFO L225 Difference]: With dead ends: 176 [2021-11-09 10:46:25,991 INFO L226 Difference]: Without dead ends: 146 [2021-11-09 10:46:25,991 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2021-11-09 10:46:25,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-11-09 10:46:25,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2021-11-09 10:46:25,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 1.0413793103448277) internal successors, (151), 145 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:25,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 151 transitions. [2021-11-09 10:46:25,999 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 151 transitions. Word has length 143 [2021-11-09 10:46:26,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:46:26,000 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 151 transitions. [2021-11-09 10:46:26,000 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 2.1166666666666667) internal successors, (127), 60 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:26,000 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 151 transitions. [2021-11-09 10:46:26,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-11-09 10:46:26,000 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:46:26,001 INFO L513 BasicCegarLoop]: trace histogram [61, 57, 16, 4, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:46:26,027 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2021-11-09 10:46:26,201 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-11-09 10:46:26,201 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:46:26,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:46:26,202 INFO L85 PathProgramCache]: Analyzing trace with hash -597846577, now seen corresponding path program 56 times [2021-11-09 10:46:26,202 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:46:26,202 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620059808] [2021-11-09 10:46:26,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:46:26,202 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:46:26,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:27,629 INFO L134 CoverageAnalysis]: Checked inductivity of 3857 backedges. 406 proven. 3306 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-11-09 10:46:27,629 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:46:27,629 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620059808] [2021-11-09 10:46:27,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620059808] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:46:27,630 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92834144] [2021-11-09 10:46:27,630 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 10:46:27,630 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:46:27,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:46:27,630 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:46:27,631 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2021-11-09 10:46:29,260 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 10:46:29,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:46:29,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 59 conjunts are in the unsatisfiable core [2021-11-09 10:46:29,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:46:29,782 INFO L134 CoverageAnalysis]: Checked inductivity of 3857 backedges. 406 proven. 3306 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-11-09 10:46:29,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92834144] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:46:29,783 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:46:29,783 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 61 [2021-11-09 10:46:29,784 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793518797] [2021-11-09 10:46:29,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2021-11-09 10:46:29,784 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:46:29,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-11-09 10:46:29,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2021-11-09 10:46:29,786 INFO L87 Difference]: Start difference. First operand 146 states and 151 transitions. Second operand has 61 states, 61 states have (on average 2.1147540983606556) internal successors, (129), 61 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:29,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:46:29,962 INFO L93 Difference]: Finished difference Result 178 states and 189 transitions. [2021-11-09 10:46:29,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-11-09 10:46:29,963 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.1147540983606556) internal successors, (129), 61 states have internal predecessors, (129), 0 states have call successors, (0), 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 145 [2021-11-09 10:46:29,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:46:29,964 INFO L225 Difference]: With dead ends: 178 [2021-11-09 10:46:29,964 INFO L226 Difference]: Without dead ends: 148 [2021-11-09 10:46:29,964 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2021-11-09 10:46:29,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-11-09 10:46:29,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2021-11-09 10:46:29,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.0408163265306123) internal successors, (153), 147 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:29,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 153 transitions. [2021-11-09 10:46:29,973 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 153 transitions. Word has length 145 [2021-11-09 10:46:29,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:46:29,973 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 153 transitions. [2021-11-09 10:46:29,973 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 2.1147540983606556) internal successors, (129), 61 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:29,974 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 153 transitions. [2021-11-09 10:46:29,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-11-09 10:46:29,974 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:46:29,974 INFO L513 BasicCegarLoop]: trace histogram [62, 58, 16, 4, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:46:30,007 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2021-11-09 10:46:30,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:46:30,175 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:46:30,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:46:30,175 INFO L85 PathProgramCache]: Analyzing trace with hash -1813549364, now seen corresponding path program 57 times [2021-11-09 10:46:30,175 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:46:30,176 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616597861] [2021-11-09 10:46:30,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:46:30,176 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:46:30,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:31,548 INFO L134 CoverageAnalysis]: Checked inductivity of 3980 backedges. 413 proven. 3422 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-11-09 10:46:31,548 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:46:31,548 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616597861] [2021-11-09 10:46:31,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616597861] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:46:31,548 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027775689] [2021-11-09 10:46:31,549 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 10:46:31,549 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:46:31,549 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:46:31,549 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:46:31,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-11-09 10:46:33,186 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-11-09 10:46:33,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:46:33,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-09 10:46:33,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:46:34,474 INFO L134 CoverageAnalysis]: Checked inductivity of 3980 backedges. 422 proven. 136 refuted. 0 times theorem prover too weak. 3422 trivial. 0 not checked. [2021-11-09 10:46:34,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027775689] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:46:34,475 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:46:34,475 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 19] total 78 [2021-11-09 10:46:34,475 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395894875] [2021-11-09 10:46:34,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2021-11-09 10:46:34,475 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:46:34,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2021-11-09 10:46:34,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2000, Invalid=4006, Unknown=0, NotChecked=0, Total=6006 [2021-11-09 10:46:34,477 INFO L87 Difference]: Start difference. First operand 148 states and 153 transitions. Second operand has 78 states, 78 states have (on average 2.0) internal successors, (156), 78 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:36,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:46:36,324 INFO L93 Difference]: Finished difference Result 201 states and 223 transitions. [2021-11-09 10:46:36,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-11-09 10:46:36,325 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 2.0) internal successors, (156), 78 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 147 [2021-11-09 10:46:36,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:46:36,326 INFO L225 Difference]: With dead ends: 201 [2021-11-09 10:46:36,326 INFO L226 Difference]: Without dead ends: 171 [2021-11-09 10:46:36,327 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2970 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=6366, Invalid=12266, Unknown=0, NotChecked=0, Total=18632 [2021-11-09 10:46:36,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-11-09 10:46:36,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 151. [2021-11-09 10:46:36,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 1.04) internal successors, (156), 150 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:36,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 156 transitions. [2021-11-09 10:46:36,336 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 156 transitions. Word has length 147 [2021-11-09 10:46:36,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:46:36,337 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 156 transitions. [2021-11-09 10:46:36,337 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 2.0) internal successors, (156), 78 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:36,337 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 156 transitions. [2021-11-09 10:46:36,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-11-09 10:46:36,338 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:46:36,338 INFO L513 BasicCegarLoop]: trace histogram [63, 59, 17, 4, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:46:36,366 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2021-11-09 10:46:36,540 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-11-09 10:46:36,540 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:46:36,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:46:36,540 INFO L85 PathProgramCache]: Analyzing trace with hash 2073689603, now seen corresponding path program 58 times [2021-11-09 10:46:36,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:46:36,541 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851270875] [2021-11-09 10:46:36,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:46:36,541 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:46:36,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:37,868 INFO L134 CoverageAnalysis]: Checked inductivity of 4122 backedges. 420 proven. 3540 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-11-09 10:46:37,868 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:46:37,868 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851270875] [2021-11-09 10:46:37,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851270875] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:46:37,868 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146168570] [2021-11-09 10:46:37,868 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 10:46:37,868 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:46:37,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:46:37,869 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:46:37,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2021-11-09 10:46:39,784 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 10:46:39,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:46:39,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 61 conjunts are in the unsatisfiable core [2021-11-09 10:46:39,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:46:40,273 INFO L134 CoverageAnalysis]: Checked inductivity of 4122 backedges. 420 proven. 3540 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-11-09 10:46:40,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146168570] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:46:40,273 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:46:40,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 63 [2021-11-09 10:46:40,274 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518109853] [2021-11-09 10:46:40,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2021-11-09 10:46:40,275 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:46:40,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-11-09 10:46:40,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2021-11-09 10:46:40,277 INFO L87 Difference]: Start difference. First operand 151 states and 156 transitions. Second operand has 63 states, 63 states have (on average 2.111111111111111) internal successors, (133), 63 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) [2021-11-09 10:46:40,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:46:40,522 INFO L93 Difference]: Finished difference Result 184 states and 195 transitions. [2021-11-09 10:46:40,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-11-09 10:46:40,522 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.111111111111111) internal successors, (133), 63 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 150 [2021-11-09 10:46:40,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:46:40,524 INFO L225 Difference]: With dead ends: 184 [2021-11-09 10:46:40,524 INFO L226 Difference]: Without dead ends: 153 [2021-11-09 10:46:40,525 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2021-11-09 10:46:40,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-11-09 10:46:40,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2021-11-09 10:46:40,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 1.0394736842105263) internal successors, (158), 152 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:40,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 158 transitions. [2021-11-09 10:46:40,540 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 158 transitions. Word has length 150 [2021-11-09 10:46:40,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:46:40,541 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 158 transitions. [2021-11-09 10:46:40,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.111111111111111) internal successors, (133), 63 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) [2021-11-09 10:46:40,541 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 158 transitions. [2021-11-09 10:46:40,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-11-09 10:46:40,542 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:46:40,543 INFO L513 BasicCegarLoop]: trace histogram [64, 60, 17, 4, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:46:40,600 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2021-11-09 10:46:40,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:46:40,756 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:46:40,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:46:40,756 INFO L85 PathProgramCache]: Analyzing trace with hash 1479621414, now seen corresponding path program 59 times [2021-11-09 10:46:40,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:46:40,757 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177617698] [2021-11-09 10:46:40,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:46:40,757 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:46:40,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:42,410 INFO L134 CoverageAnalysis]: Checked inductivity of 4249 backedges. 427 proven. 3660 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-11-09 10:46:42,410 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:46:42,410 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177617698] [2021-11-09 10:46:42,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177617698] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:46:42,410 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018402786] [2021-11-09 10:46:42,410 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 10:46:42,411 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:46:42,411 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:46:42,413 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:46:42,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2021-11-09 10:46:44,583 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 65 check-sat command(s) [2021-11-09 10:46:44,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:46:44,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 62 conjunts are in the unsatisfiable core [2021-11-09 10:46:44,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:46:45,001 INFO L134 CoverageAnalysis]: Checked inductivity of 4249 backedges. 427 proven. 3660 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-11-09 10:46:45,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2018402786] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:46:45,002 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:46:45,002 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 64 [2021-11-09 10:46:45,002 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729981206] [2021-11-09 10:46:45,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2021-11-09 10:46:45,002 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:46:45,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-11-09 10:46:45,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2021-11-09 10:46:45,004 INFO L87 Difference]: Start difference. First operand 153 states and 158 transitions. Second operand has 64 states, 64 states have (on average 2.109375) internal successors, (135), 64 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:45,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:46:45,165 INFO L93 Difference]: Finished difference Result 186 states and 197 transitions. [2021-11-09 10:46:45,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-11-09 10:46:45,166 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.109375) internal successors, (135), 64 states have internal predecessors, (135), 0 states have call successors, (0), 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 152 [2021-11-09 10:46:45,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:46:45,167 INFO L225 Difference]: With dead ends: 186 [2021-11-09 10:46:45,167 INFO L226 Difference]: Without dead ends: 155 [2021-11-09 10:46:45,168 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2021-11-09 10:46:45,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-11-09 10:46:45,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2021-11-09 10:46:45,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 1.0389610389610389) internal successors, (160), 154 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:45,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 160 transitions. [2021-11-09 10:46:45,179 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 160 transitions. Word has length 152 [2021-11-09 10:46:45,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:46:45,179 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 160 transitions. [2021-11-09 10:46:45,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.109375) internal successors, (135), 64 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:45,180 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 160 transitions. [2021-11-09 10:46:45,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-11-09 10:46:45,181 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:46:45,181 INFO L513 BasicCegarLoop]: trace histogram [65, 61, 17, 4, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:46:45,215 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2021-11-09 10:46:45,388 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:46:45,388 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:46:45,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:46:45,388 INFO L85 PathProgramCache]: Analyzing trace with hash 1810742153, now seen corresponding path program 60 times [2021-11-09 10:46:45,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:46:45,388 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051899793] [2021-11-09 10:46:45,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:46:45,389 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:46:45,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:47,053 INFO L134 CoverageAnalysis]: Checked inductivity of 4378 backedges. 434 proven. 3782 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-11-09 10:46:47,053 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:46:47,053 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051899793] [2021-11-09 10:46:47,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051899793] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:46:47,053 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272942667] [2021-11-09 10:46:47,054 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 10:46:47,054 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:46:47,054 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:46:47,055 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:46:47,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2021-11-09 10:46:49,092 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-11-09 10:46:49,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:46:49,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-09 10:46:49,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:46:49,593 INFO L134 CoverageAnalysis]: Checked inductivity of 4378 backedges. 549 proven. 16 refuted. 0 times theorem prover too weak. 3813 trivial. 0 not checked. [2021-11-09 10:46:49,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272942667] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:46:49,594 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:46:49,594 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 7] total 69 [2021-11-09 10:46:49,594 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76058036] [2021-11-09 10:46:49,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2021-11-09 10:46:49,594 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:46:49,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-11-09 10:46:49,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2021-11-09 10:46:49,596 INFO L87 Difference]: Start difference. First operand 155 states and 160 transitions. Second operand has 69 states, 69 states have (on average 2.130434782608696) internal successors, (147), 69 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) [2021-11-09 10:46:49,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:46:49,843 INFO L93 Difference]: Finished difference Result 191 states and 205 transitions. [2021-11-09 10:46:49,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-11-09 10:46:49,844 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.130434782608696) internal successors, (147), 69 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 154 [2021-11-09 10:46:49,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:46:49,845 INFO L225 Difference]: With dead ends: 191 [2021-11-09 10:46:49,845 INFO L226 Difference]: Without dead ends: 160 [2021-11-09 10:46:49,846 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2021-11-09 10:46:49,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-11-09 10:46:49,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 159. [2021-11-09 10:46:49,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 1.0443037974683544) internal successors, (165), 158 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:49,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 165 transitions. [2021-11-09 10:46:49,858 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 165 transitions. Word has length 154 [2021-11-09 10:46:49,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:46:49,858 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 165 transitions. [2021-11-09 10:46:49,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 2.130434782608696) internal successors, (147), 69 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) [2021-11-09 10:46:49,859 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 165 transitions. [2021-11-09 10:46:49,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-11-09 10:46:49,859 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:46:49,859 INFO L513 BasicCegarLoop]: trace histogram [67, 62, 17, 5, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:46:49,888 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2021-11-09 10:46:50,060 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-11-09 10:46:50,060 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:46:50,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:46:50,060 INFO L85 PathProgramCache]: Analyzing trace with hash -1823680879, now seen corresponding path program 61 times [2021-11-09 10:46:50,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:46:50,061 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92196778] [2021-11-09 10:46:50,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:46:50,061 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:46:50,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:51,681 INFO L134 CoverageAnalysis]: Checked inductivity of 4642 backedges. 567 proven. 3906 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-11-09 10:46:51,681 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:46:51,682 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92196778] [2021-11-09 10:46:51,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92196778] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:46:51,682 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586825799] [2021-11-09 10:46:51,682 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 10:46:51,682 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:46:51,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:46:51,685 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:46:51,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2021-11-09 10:46:53,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:53,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 64 conjunts are in the unsatisfiable core [2021-11-09 10:46:53,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:46:54,201 INFO L134 CoverageAnalysis]: Checked inductivity of 4642 backedges. 567 proven. 3906 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-11-09 10:46:54,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586825799] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:46:54,202 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:46:54,202 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 66 [2021-11-09 10:46:54,202 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014766059] [2021-11-09 10:46:54,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2021-11-09 10:46:54,203 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:46:54,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-11-09 10:46:54,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2021-11-09 10:46:54,204 INFO L87 Difference]: Start difference. First operand 159 states and 165 transitions. Second operand has 66 states, 66 states have (on average 2.106060606060606) internal successors, (139), 66 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:54,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:46:54,372 INFO L93 Difference]: Finished difference Result 194 states and 207 transitions. [2021-11-09 10:46:54,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-11-09 10:46:54,372 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.106060606060606) internal successors, (139), 66 states have internal predecessors, (139), 0 states have call successors, (0), 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 158 [2021-11-09 10:46:54,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:46:54,373 INFO L225 Difference]: With dead ends: 194 [2021-11-09 10:46:54,374 INFO L226 Difference]: Without dead ends: 161 [2021-11-09 10:46:54,374 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2021-11-09 10:46:54,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-11-09 10:46:54,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2021-11-09 10:46:54,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 1.04375) internal successors, (167), 160 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:54,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 167 transitions. [2021-11-09 10:46:54,393 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 167 transitions. Word has length 158 [2021-11-09 10:46:54,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:46:54,394 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 167 transitions. [2021-11-09 10:46:54,394 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.106060606060606) internal successors, (139), 66 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:54,394 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 167 transitions. [2021-11-09 10:46:54,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-11-09 10:46:54,395 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:46:54,395 INFO L513 BasicCegarLoop]: trace histogram [68, 63, 17, 5, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:46:54,426 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2021-11-09 10:46:54,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-11-09 10:46:54,596 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:46:54,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:46:54,597 INFO L85 PathProgramCache]: Analyzing trace with hash 2092056756, now seen corresponding path program 62 times [2021-11-09 10:46:54,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:46:54,597 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192485654] [2021-11-09 10:46:54,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:46:54,597 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:46:54,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:56,445 INFO L134 CoverageAnalysis]: Checked inductivity of 4777 backedges. 576 proven. 4032 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-11-09 10:46:56,445 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:46:56,445 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192485654] [2021-11-09 10:46:56,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192485654] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:46:56,445 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040443240] [2021-11-09 10:46:56,445 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 10:46:56,446 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:46:56,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:46:56,447 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:46:56,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2021-11-09 10:46:58,631 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 10:46:58,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:46:58,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 65 conjunts are in the unsatisfiable core [2021-11-09 10:46:58,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:46:59,070 INFO L134 CoverageAnalysis]: Checked inductivity of 4777 backedges. 576 proven. 4032 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-11-09 10:46:59,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040443240] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:46:59,071 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:46:59,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 67 [2021-11-09 10:46:59,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372252714] [2021-11-09 10:46:59,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2021-11-09 10:46:59,072 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:46:59,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-11-09 10:46:59,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2021-11-09 10:46:59,073 INFO L87 Difference]: Start difference. First operand 161 states and 167 transitions. Second operand has 67 states, 67 states have (on average 2.1044776119402986) internal successors, (141), 67 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) [2021-11-09 10:46:59,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:46:59,255 INFO L93 Difference]: Finished difference Result 196 states and 209 transitions. [2021-11-09 10:46:59,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-11-09 10:46:59,255 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.1044776119402986) internal successors, (141), 67 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) Word has length 160 [2021-11-09 10:46:59,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:46:59,256 INFO L225 Difference]: With dead ends: 196 [2021-11-09 10:46:59,257 INFO L226 Difference]: Without dead ends: 163 [2021-11-09 10:46:59,257 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2021-11-09 10:46:59,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-11-09 10:46:59,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2021-11-09 10:46:59,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 1.0432098765432098) internal successors, (169), 162 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:59,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 169 transitions. [2021-11-09 10:46:59,275 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 169 transitions. Word has length 160 [2021-11-09 10:46:59,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:46:59,275 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 169 transitions. [2021-11-09 10:46:59,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 2.1044776119402986) internal successors, (141), 67 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) [2021-11-09 10:46:59,276 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 169 transitions. [2021-11-09 10:46:59,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-11-09 10:46:59,277 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:46:59,277 INFO L513 BasicCegarLoop]: trace histogram [69, 64, 17, 5, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:46:59,332 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2021-11-09 10:46:59,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:46:59,495 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:46:59,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:46:59,495 INFO L85 PathProgramCache]: Analyzing trace with hash -1570394601, now seen corresponding path program 63 times [2021-11-09 10:46:59,495 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:46:59,496 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005693412] [2021-11-09 10:46:59,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:46:59,496 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:46:59,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:47:01,343 INFO L134 CoverageAnalysis]: Checked inductivity of 4914 backedges. 585 proven. 4160 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-11-09 10:47:01,344 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:47:01,344 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005693412] [2021-11-09 10:47:01,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005693412] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:47:01,344 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142604301] [2021-11-09 10:47:01,344 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 10:47:01,344 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:47:01,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:47:01,345 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:47:01,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2021-11-09 10:47:03,588 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-11-09 10:47:03,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:47:03,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-09 10:47:03,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:47:05,420 INFO L134 CoverageAnalysis]: Checked inductivity of 4914 backedges. 601 proven. 153 refuted. 0 times theorem prover too weak. 4160 trivial. 0 not checked. [2021-11-09 10:47:05,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142604301] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:47:05,421 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:47:05,421 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 20] total 85 [2021-11-09 10:47:05,421 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194644365] [2021-11-09 10:47:05,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2021-11-09 10:47:05,421 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:47:05,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2021-11-09 10:47:05,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2400, Invalid=4740, Unknown=0, NotChecked=0, Total=7140 [2021-11-09 10:47:05,423 INFO L87 Difference]: Start difference. First operand 163 states and 169 transitions. Second operand has 85 states, 85 states have (on average 2.011764705882353) internal successors, (171), 85 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:47:07,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:47:07,843 INFO L93 Difference]: Finished difference Result 229 states and 258 transitions. [2021-11-09 10:47:07,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-11-09 10:47:07,843 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 2.011764705882353) internal successors, (171), 85 states have internal predecessors, (171), 0 states have call successors, (0), 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 162 [2021-11-09 10:47:07,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:47:07,844 INFO L225 Difference]: With dead ends: 229 [2021-11-09 10:47:07,844 INFO L226 Difference]: Without dead ends: 196 [2021-11-09 10:47:07,846 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3612 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=7600, Invalid=14750, Unknown=0, NotChecked=0, Total=22350 [2021-11-09 10:47:07,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-11-09 10:47:07,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 166. [2021-11-09 10:47:07,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 1.0424242424242425) internal successors, (172), 165 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:47:07,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 172 transitions. [2021-11-09 10:47:07,864 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 172 transitions. Word has length 162 [2021-11-09 10:47:07,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:47:07,865 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 172 transitions. [2021-11-09 10:47:07,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 2.011764705882353) internal successors, (171), 85 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:47:07,865 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 172 transitions. [2021-11-09 10:47:07,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-11-09 10:47:07,866 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:47:07,867 INFO L513 BasicCegarLoop]: trace histogram [70, 65, 18, 5, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:47:07,917 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2021-11-09 10:47:08,080 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-11-09 10:47:08,080 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:47:08,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:47:08,080 INFO L85 PathProgramCache]: Analyzing trace with hash -175115790, now seen corresponding path program 64 times [2021-11-09 10:47:08,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:47:08,080 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827856184] [2021-11-09 10:47:08,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:47:08,081 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:47:08,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:47:09,971 INFO L134 CoverageAnalysis]: Checked inductivity of 5071 backedges. 594 proven. 4290 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2021-11-09 10:47:09,971 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:47:09,971 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827856184] [2021-11-09 10:47:09,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827856184] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:47:09,971 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047640530] [2021-11-09 10:47:09,972 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 10:47:09,972 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:47:09,972 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:47:09,972 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:47:09,973 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2021-11-09 10:47:12,389 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 10:47:12,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:47:12,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 67 conjunts are in the unsatisfiable core [2021-11-09 10:47:12,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:47:12,863 INFO L134 CoverageAnalysis]: Checked inductivity of 5071 backedges. 594 proven. 4290 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2021-11-09 10:47:12,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1047640530] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:47:12,864 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:47:12,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 69 [2021-11-09 10:47:12,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743293097] [2021-11-09 10:47:12,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2021-11-09 10:47:12,865 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:47:12,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-11-09 10:47:12,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2021-11-09 10:47:12,867 INFO L87 Difference]: Start difference. First operand 166 states and 172 transitions. Second operand has 69 states, 69 states have (on average 2.101449275362319) internal successors, (145), 69 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:47:13,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:47:13,072 INFO L93 Difference]: Finished difference Result 202 states and 215 transitions. [2021-11-09 10:47:13,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-11-09 10:47:13,073 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.101449275362319) internal successors, (145), 69 states have internal predecessors, (145), 0 states have call successors, (0), 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 165 [2021-11-09 10:47:13,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:47:13,074 INFO L225 Difference]: With dead ends: 202 [2021-11-09 10:47:13,074 INFO L226 Difference]: Without dead ends: 168 [2021-11-09 10:47:13,075 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2021-11-09 10:47:13,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-11-09 10:47:13,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 168. [2021-11-09 10:47:13,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 1.0419161676646707) internal successors, (174), 167 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:47:13,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 174 transitions. [2021-11-09 10:47:13,087 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 174 transitions. Word has length 165 [2021-11-09 10:47:13,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:47:13,087 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 174 transitions. [2021-11-09 10:47:13,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 2.101449275362319) internal successors, (145), 69 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:47:13,087 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 174 transitions. [2021-11-09 10:47:13,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-11-09 10:47:13,088 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:47:13,088 INFO L513 BasicCegarLoop]: trace histogram [71, 66, 18, 5, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:47:13,119 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2021-11-09 10:47:13,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:47:13,292 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:47:13,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:47:13,292 INFO L85 PathProgramCache]: Analyzing trace with hash 283667055, now seen corresponding path program 65 times [2021-11-09 10:47:13,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:47:13,292 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70621820] [2021-11-09 10:47:13,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:47:13,293 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:47:13,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:47:15,155 INFO L134 CoverageAnalysis]: Checked inductivity of 5212 backedges. 603 proven. 4422 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2021-11-09 10:47:15,156 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:47:15,156 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70621820] [2021-11-09 10:47:15,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70621820] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:47:15,156 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343293304] [2021-11-09 10:47:15,156 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 10:47:15,156 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:47:15,156 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:47:15,157 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:47:15,160 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2021-11-09 10:47:17,582 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 72 check-sat command(s) [2021-11-09 10:47:17,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:47:17,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 68 conjunts are in the unsatisfiable core [2021-11-09 10:47:17,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:47:18,048 INFO L134 CoverageAnalysis]: Checked inductivity of 5212 backedges. 603 proven. 4422 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2021-11-09 10:47:18,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343293304] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:47:18,049 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:47:18,049 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 70 [2021-11-09 10:47:18,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501120301] [2021-11-09 10:47:18,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2021-11-09 10:47:18,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:47:18,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-11-09 10:47:18,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2021-11-09 10:47:18,051 INFO L87 Difference]: Start difference. First operand 168 states and 174 transitions. Second operand has 70 states, 70 states have (on average 2.1) internal successors, (147), 70 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) [2021-11-09 10:47:18,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:47:18,237 INFO L93 Difference]: Finished difference Result 204 states and 217 transitions. [2021-11-09 10:47:18,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-11-09 10:47:18,237 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.1) internal successors, (147), 70 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 167 [2021-11-09 10:47:18,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:47:18,238 INFO L225 Difference]: With dead ends: 204 [2021-11-09 10:47:18,238 INFO L226 Difference]: Without dead ends: 170 [2021-11-09 10:47:18,239 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2021-11-09 10:47:18,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-11-09 10:47:18,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 170. [2021-11-09 10:47:18,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 1.0414201183431953) internal successors, (176), 169 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:47:18,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 176 transitions. [2021-11-09 10:47:18,259 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 176 transitions. Word has length 167 [2021-11-09 10:47:18,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:47:18,259 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 176 transitions. [2021-11-09 10:47:18,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 2.1) internal successors, (147), 70 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) [2021-11-09 10:47:18,260 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 176 transitions. [2021-11-09 10:47:18,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2021-11-09 10:47:18,261 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:47:18,261 INFO L513 BasicCegarLoop]: trace histogram [72, 67, 18, 5, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:47:18,312 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2021-11-09 10:47:18,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-11-09 10:47:18,488 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:47:18,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:47:18,488 INFO L85 PathProgramCache]: Analyzing trace with hash -1207650388, now seen corresponding path program 66 times [2021-11-09 10:47:18,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:47:18,489 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764869369] [2021-11-09 10:47:18,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:47:18,489 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:47:18,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:47:20,403 INFO L134 CoverageAnalysis]: Checked inductivity of 5355 backedges. 612 proven. 4556 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2021-11-09 10:47:20,403 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:47:20,403 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764869369] [2021-11-09 10:47:20,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764869369] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:47:20,403 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064862469] [2021-11-09 10:47:20,403 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 10:47:20,404 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:47:20,404 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:47:20,405 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:47:20,405 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2021-11-09 10:47:22,959 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-11-09 10:47:22,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:47:22,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-09 10:47:22,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:47:24,851 INFO L134 CoverageAnalysis]: Checked inductivity of 5355 backedges. 628 proven. 171 refuted. 0 times theorem prover too weak. 4556 trivial. 0 not checked. [2021-11-09 10:47:24,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1064862469] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:47:24,851 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:47:24,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 21] total 89 [2021-11-09 10:47:24,851 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962623584] [2021-11-09 10:47:24,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2021-11-09 10:47:24,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:47:24,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2021-11-09 10:47:24,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2624, Invalid=5208, Unknown=0, NotChecked=0, Total=7832 [2021-11-09 10:47:24,853 INFO L87 Difference]: Start difference. First operand 170 states and 176 transitions. Second operand has 89 states, 89 states have (on average 2.0) internal successors, (178), 89 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:47:27,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:47:27,682 INFO L93 Difference]: Finished difference Result 237 states and 266 transitions. [2021-11-09 10:47:27,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-11-09 10:47:27,683 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 2.0) internal successors, (178), 89 states have internal predecessors, (178), 0 states have call successors, (0), 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 169 [2021-11-09 10:47:27,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:47:27,684 INFO L225 Difference]: With dead ends: 237 [2021-11-09 10:47:27,684 INFO L226 Difference]: Without dead ends: 203 [2021-11-09 10:47:27,685 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3953 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=8336, Invalid=16156, Unknown=0, NotChecked=0, Total=24492 [2021-11-09 10:47:27,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-11-09 10:47:27,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 173. [2021-11-09 10:47:27,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 1.0406976744186047) internal successors, (179), 172 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:47:27,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 179 transitions. [2021-11-09 10:47:27,705 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 179 transitions. Word has length 169 [2021-11-09 10:47:27,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:47:27,706 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 179 transitions. [2021-11-09 10:47:27,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 2.0) internal successors, (178), 89 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:47:27,706 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 179 transitions. [2021-11-09 10:47:27,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2021-11-09 10:47:27,708 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:47:27,708 INFO L513 BasicCegarLoop]: trace histogram [73, 68, 19, 5, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:47:27,745 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2021-11-09 10:47:27,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:47:27,920 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:47:27,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:47:27,920 INFO L85 PathProgramCache]: Analyzing trace with hash 522974435, now seen corresponding path program 67 times [2021-11-09 10:47:27,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:47:27,921 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131907853] [2021-11-09 10:47:27,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:47:27,921 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:47:27,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:47:29,994 INFO L134 CoverageAnalysis]: Checked inductivity of 5519 backedges. 621 proven. 4692 refuted. 0 times theorem prover too weak. 206 trivial. 0 not checked. [2021-11-09 10:47:29,995 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:47:29,995 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131907853] [2021-11-09 10:47:29,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131907853] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:47:29,995 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186463216] [2021-11-09 10:47:29,995 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 10:47:29,995 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:47:29,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:47:29,996 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:47:29,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2021-11-09 10:47:32,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:47:32,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 70 conjunts are in the unsatisfiable core [2021-11-09 10:47:32,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:47:33,387 INFO L134 CoverageAnalysis]: Checked inductivity of 5519 backedges. 621 proven. 4692 refuted. 0 times theorem prover too weak. 206 trivial. 0 not checked. [2021-11-09 10:47:33,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186463216] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:47:33,387 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:47:33,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 72 [2021-11-09 10:47:33,388 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129561305] [2021-11-09 10:47:33,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2021-11-09 10:47:33,389 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:47:33,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2021-11-09 10:47:33,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2021-11-09 10:47:33,390 INFO L87 Difference]: Start difference. First operand 173 states and 179 transitions. Second operand has 72 states, 72 states have (on average 2.0972222222222223) internal successors, (151), 72 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:47:33,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:47:33,645 INFO L93 Difference]: Finished difference Result 210 states and 223 transitions. [2021-11-09 10:47:33,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-11-09 10:47:33,646 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 2.0972222222222223) internal successors, (151), 72 states have internal predecessors, (151), 0 states have call successors, (0), 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 172 [2021-11-09 10:47:33,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:47:33,647 INFO L225 Difference]: With dead ends: 210 [2021-11-09 10:47:33,648 INFO L226 Difference]: Without dead ends: 175 [2021-11-09 10:47:33,648 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2021-11-09 10:47:33,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-11-09 10:47:33,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2021-11-09 10:47:33,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 1.0402298850574712) internal successors, (181), 174 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:47:33,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 181 transitions. [2021-11-09 10:47:33,668 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 181 transitions. Word has length 172 [2021-11-09 10:47:33,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:47:33,669 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 181 transitions. [2021-11-09 10:47:33,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 2.0972222222222223) internal successors, (151), 72 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:47:33,669 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 181 transitions. [2021-11-09 10:47:33,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2021-11-09 10:47:33,670 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:47:33,671 INFO L513 BasicCegarLoop]: trace histogram [74, 69, 19, 5, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:47:33,722 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2021-11-09 10:47:33,884 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:47:33,884 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:47:33,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:47:33,884 INFO L85 PathProgramCache]: Analyzing trace with hash 1456432582, now seen corresponding path program 68 times [2021-11-09 10:47:33,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:47:33,884 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000243539] [2021-11-09 10:47:33,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:47:33,885 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:47:33,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:47:36,091 INFO L134 CoverageAnalysis]: Checked inductivity of 5666 backedges. 630 proven. 4830 refuted. 0 times theorem prover too weak. 206 trivial. 0 not checked. [2021-11-09 10:47:36,091 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:47:36,091 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000243539] [2021-11-09 10:47:36,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000243539] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:47:36,091 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835977456] [2021-11-09 10:47:36,091 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 10:47:36,091 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:47:36,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:47:36,092 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:47:36,093 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2021-11-09 10:47:38,946 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 10:47:38,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:47:38,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 71 conjunts are in the unsatisfiable core [2021-11-09 10:47:38,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:47:39,497 INFO L134 CoverageAnalysis]: Checked inductivity of 5666 backedges. 630 proven. 4830 refuted. 0 times theorem prover too weak. 206 trivial. 0 not checked. [2021-11-09 10:47:39,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835977456] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:47:39,497 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:47:39,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 73 [2021-11-09 10:47:39,498 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008858189] [2021-11-09 10:47:39,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2021-11-09 10:47:39,498 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:47:39,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2021-11-09 10:47:39,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2021-11-09 10:47:39,499 INFO L87 Difference]: Start difference. First operand 175 states and 181 transitions. Second operand has 73 states, 73 states have (on average 2.095890410958904) internal successors, (153), 73 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:47:39,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:47:39,699 INFO L93 Difference]: Finished difference Result 212 states and 225 transitions. [2021-11-09 10:47:39,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-11-09 10:47:39,699 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 2.095890410958904) internal successors, (153), 73 states have internal predecessors, (153), 0 states have call successors, (0), 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 174 [2021-11-09 10:47:39,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:47:39,700 INFO L225 Difference]: With dead ends: 212 [2021-11-09 10:47:39,700 INFO L226 Difference]: Without dead ends: 177 [2021-11-09 10:47:39,701 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2021-11-09 10:47:39,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-11-09 10:47:39,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2021-11-09 10:47:39,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 1.0397727272727273) internal successors, (183), 176 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:47:39,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 183 transitions. [2021-11-09 10:47:39,714 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 183 transitions. Word has length 174 [2021-11-09 10:47:39,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:47:39,714 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 183 transitions. [2021-11-09 10:47:39,715 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 2.095890410958904) internal successors, (153), 73 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:47:39,715 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 183 transitions. [2021-11-09 10:47:39,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2021-11-09 10:47:39,716 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:47:39,716 INFO L513 BasicCegarLoop]: trace histogram [75, 70, 19, 5, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:47:39,767 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2021-11-09 10:47:39,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:47:39,936 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:47:39,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:47:39,936 INFO L85 PathProgramCache]: Analyzing trace with hash 861546985, now seen corresponding path program 69 times [2021-11-09 10:47:39,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:47:39,936 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985615020] [2021-11-09 10:47:39,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:47:39,937 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:47:39,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:47:41,881 INFO L134 CoverageAnalysis]: Checked inductivity of 5815 backedges. 639 proven. 4970 refuted. 0 times theorem prover too weak. 206 trivial. 0 not checked. [2021-11-09 10:47:41,881 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:47:41,882 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985615020] [2021-11-09 10:47:41,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985615020] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:47:41,882 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621181550] [2021-11-09 10:47:41,882 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 10:47:41,882 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:47:41,882 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:47:41,883 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:47:41,884 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2021-11-09 10:47:44,558 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-11-09 10:47:44,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:47:44,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-09 10:47:44,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:47:46,360 INFO L134 CoverageAnalysis]: Checked inductivity of 5815 backedges. 655 proven. 190 refuted. 0 times theorem prover too weak. 4970 trivial. 0 not checked. [2021-11-09 10:47:46,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621181550] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:47:46,360 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:47:46,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 22] total 93 [2021-11-09 10:47:46,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180177436] [2021-11-09 10:47:46,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2021-11-09 10:47:46,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:47:46,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2021-11-09 10:47:46,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2858, Invalid=5698, Unknown=0, NotChecked=0, Total=8556 [2021-11-09 10:47:46,362 INFO L87 Difference]: Start difference. First operand 177 states and 183 transitions. Second operand has 93 states, 93 states have (on average 1.989247311827957) internal successors, (185), 93 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:47:49,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:47:49,301 INFO L93 Difference]: Finished difference Result 245 states and 274 transitions. [2021-11-09 10:47:49,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-11-09 10:47:49,302 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 1.989247311827957) internal successors, (185), 93 states have internal predecessors, (185), 0 states have call successors, (0), 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 176 [2021-11-09 10:47:49,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:47:49,303 INFO L225 Difference]: With dead ends: 245 [2021-11-09 10:47:49,304 INFO L226 Difference]: Without dead ends: 210 [2021-11-09 10:47:49,306 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4309 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=9106, Invalid=17626, Unknown=0, NotChecked=0, Total=26732 [2021-11-09 10:47:49,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-11-09 10:47:49,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 180. [2021-11-09 10:47:49,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 1.0391061452513966) internal successors, (186), 179 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:47:49,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 186 transitions. [2021-11-09 10:47:49,327 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 186 transitions. Word has length 176 [2021-11-09 10:47:49,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:47:49,328 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 186 transitions. [2021-11-09 10:47:49,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 1.989247311827957) internal successors, (185), 93 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:47:49,328 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 186 transitions. [2021-11-09 10:47:49,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-11-09 10:47:49,330 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:47:49,330 INFO L513 BasicCegarLoop]: trace histogram [76, 71, 20, 5, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:47:49,370 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2021-11-09 10:47:49,548 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:47:49,548 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:47:49,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:47:49,548 INFO L85 PathProgramCache]: Analyzing trace with hash -261938784, now seen corresponding path program 70 times [2021-11-09 10:47:49,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:47:49,549 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577851311] [2021-11-09 10:47:49,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:47:49,549 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:47:49,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:47:51,797 INFO L134 CoverageAnalysis]: Checked inductivity of 5986 backedges. 648 proven. 5112 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2021-11-09 10:47:51,797 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:47:51,797 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577851311] [2021-11-09 10:47:51,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577851311] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:47:51,797 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650612644] [2021-11-09 10:47:51,797 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 10:47:51,797 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:47:51,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:47:51,798 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:47:51,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2021-11-09 10:47:54,542 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 10:47:54,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:47:54,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 460 conjuncts, 73 conjunts are in the unsatisfiable core [2021-11-09 10:47:54,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:47:55,067 INFO L134 CoverageAnalysis]: Checked inductivity of 5986 backedges. 648 proven. 5112 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2021-11-09 10:47:55,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650612644] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:47:55,067 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:47:55,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 75 [2021-11-09 10:47:55,068 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760416703] [2021-11-09 10:47:55,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2021-11-09 10:47:55,068 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:47:55,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-11-09 10:47:55,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2021-11-09 10:47:55,070 INFO L87 Difference]: Start difference. First operand 180 states and 186 transitions. Second operand has 75 states, 75 states have (on average 2.0933333333333333) internal successors, (157), 75 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:47:55,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:47:55,287 INFO L93 Difference]: Finished difference Result 218 states and 231 transitions. [2021-11-09 10:47:55,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-11-09 10:47:55,288 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 2.0933333333333333) internal successors, (157), 75 states have internal predecessors, (157), 0 states have call successors, (0), 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 179 [2021-11-09 10:47:55,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:47:55,289 INFO L225 Difference]: With dead ends: 218 [2021-11-09 10:47:55,289 INFO L226 Difference]: Without dead ends: 182 [2021-11-09 10:47:55,289 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2021-11-09 10:47:55,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-11-09 10:47:55,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 182. [2021-11-09 10:47:55,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 1.0386740331491713) internal successors, (188), 181 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:47:55,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 188 transitions. [2021-11-09 10:47:55,302 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 188 transitions. Word has length 179 [2021-11-09 10:47:55,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:47:55,302 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 188 transitions. [2021-11-09 10:47:55,302 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 2.0933333333333333) internal successors, (157), 75 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:47:55,302 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 188 transitions. [2021-11-09 10:47:55,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2021-11-09 10:47:55,303 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:47:55,303 INFO L513 BasicCegarLoop]: trace histogram [77, 72, 20, 5, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:47:55,336 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2021-11-09 10:47:55,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:47:55,504 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:47:55,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:47:55,504 INFO L85 PathProgramCache]: Analyzing trace with hash 195853149, now seen corresponding path program 71 times [2021-11-09 10:47:55,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:47:55,504 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48479361] [2021-11-09 10:47:55,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:47:55,505 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:47:55,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:47:57,803 INFO L134 CoverageAnalysis]: Checked inductivity of 6139 backedges. 657 proven. 5256 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2021-11-09 10:47:57,803 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:47:57,804 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48479361] [2021-11-09 10:47:57,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48479361] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:47:57,804 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893782971] [2021-11-09 10:47:57,804 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 10:47:57,804 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:47:57,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:47:57,805 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:47:57,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2021-11-09 10:48:01,017 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 78 check-sat command(s) [2021-11-09 10:48:01,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:48:01,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 74 conjunts are in the unsatisfiable core [2021-11-09 10:48:01,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:48:01,547 INFO L134 CoverageAnalysis]: Checked inductivity of 6139 backedges. 657 proven. 5256 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2021-11-09 10:48:01,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893782971] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:48:01,548 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:48:01,548 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 76 [2021-11-09 10:48:01,548 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828591659] [2021-11-09 10:48:01,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2021-11-09 10:48:01,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:48:01,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2021-11-09 10:48:01,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2021-11-09 10:48:01,550 INFO L87 Difference]: Start difference. First operand 182 states and 188 transitions. Second operand has 76 states, 76 states have (on average 2.0921052631578947) internal successors, (159), 76 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:01,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:48:01,757 INFO L93 Difference]: Finished difference Result 220 states and 233 transitions. [2021-11-09 10:48:01,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-11-09 10:48:01,757 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 2.0921052631578947) internal successors, (159), 76 states have internal predecessors, (159), 0 states have call successors, (0), 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 181 [2021-11-09 10:48:01,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:48:01,761 INFO L225 Difference]: With dead ends: 220 [2021-11-09 10:48:01,761 INFO L226 Difference]: Without dead ends: 184 [2021-11-09 10:48:01,762 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2021-11-09 10:48:01,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-11-09 10:48:01,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 184. [2021-11-09 10:48:01,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 1.0382513661202186) internal successors, (190), 183 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:01,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 190 transitions. [2021-11-09 10:48:01,785 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 190 transitions. Word has length 181 [2021-11-09 10:48:01,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:48:01,785 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 190 transitions. [2021-11-09 10:48:01,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 2.0921052631578947) internal successors, (159), 76 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:01,787 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 190 transitions. [2021-11-09 10:48:01,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2021-11-09 10:48:01,788 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:48:01,788 INFO L513 BasicCegarLoop]: trace histogram [78, 73, 20, 5, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:48:01,844 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2021-11-09 10:48:02,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:48:02,004 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:48:02,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:48:02,004 INFO L85 PathProgramCache]: Analyzing trace with hash 2047236570, now seen corresponding path program 72 times [2021-11-09 10:48:02,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:48:02,004 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347394676] [2021-11-09 10:48:02,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:48:02,005 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:48:02,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:48:04,369 INFO L134 CoverageAnalysis]: Checked inductivity of 6294 backedges. 666 proven. 5402 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2021-11-09 10:48:04,370 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:48:04,370 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347394676] [2021-11-09 10:48:04,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347394676] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:48:04,370 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505500598] [2021-11-09 10:48:04,370 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 10:48:04,370 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:48:04,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:48:04,371 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:48:04,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2021-11-09 10:48:07,455 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2021-11-09 10:48:07,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:48:07,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-09 10:48:07,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:48:09,483 INFO L134 CoverageAnalysis]: Checked inductivity of 6294 backedges. 682 proven. 210 refuted. 0 times theorem prover too weak. 5402 trivial. 0 not checked. [2021-11-09 10:48:09,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505500598] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:48:09,484 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:48:09,484 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 23] total 97 [2021-11-09 10:48:09,484 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855330191] [2021-11-09 10:48:09,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2021-11-09 10:48:09,485 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:48:09,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2021-11-09 10:48:09,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3102, Invalid=6210, Unknown=0, NotChecked=0, Total=9312 [2021-11-09 10:48:09,487 INFO L87 Difference]: Start difference. First operand 184 states and 190 transitions. Second operand has 97 states, 97 states have (on average 1.9793814432989691) internal successors, (192), 97 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:12,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:48:12,739 INFO L93 Difference]: Finished difference Result 253 states and 282 transitions. [2021-11-09 10:48:12,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-11-09 10:48:12,740 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 1.9793814432989691) internal successors, (192), 97 states have internal predecessors, (192), 0 states have call successors, (0), 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 183 [2021-11-09 10:48:12,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:48:12,741 INFO L225 Difference]: With dead ends: 253 [2021-11-09 10:48:12,741 INFO L226 Difference]: Without dead ends: 217 [2021-11-09 10:48:12,743 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4680 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=9910, Invalid=19160, Unknown=0, NotChecked=0, Total=29070 [2021-11-09 10:48:12,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-11-09 10:48:12,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 187. [2021-11-09 10:48:12,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 186 states have (on average 1.0376344086021505) internal successors, (193), 186 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:12,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 193 transitions. [2021-11-09 10:48:12,757 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 193 transitions. Word has length 183 [2021-11-09 10:48:12,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:48:12,758 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 193 transitions. [2021-11-09 10:48:12,758 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 1.9793814432989691) internal successors, (192), 97 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:12,758 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 193 transitions. [2021-11-09 10:48:12,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2021-11-09 10:48:12,759 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:48:12,759 INFO L513 BasicCegarLoop]: trace histogram [79, 74, 21, 5, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:48:12,794 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2021-11-09 10:48:12,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:48:12,964 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:48:12,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:48:12,964 INFO L85 PathProgramCache]: Analyzing trace with hash 1929936693, now seen corresponding path program 73 times [2021-11-09 10:48:12,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:48:12,964 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544865448] [2021-11-09 10:48:12,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:48:12,965 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:48:13,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:48:15,178 INFO L134 CoverageAnalysis]: Checked inductivity of 6472 backedges. 675 proven. 5550 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2021-11-09 10:48:15,178 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:48:15,178 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544865448] [2021-11-09 10:48:15,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544865448] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:48:15,178 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086485574] [2021-11-09 10:48:15,178 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 10:48:15,179 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:48:15,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:48:15,179 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:48:15,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2021-11-09 10:48:18,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:48:18,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 76 conjunts are in the unsatisfiable core [2021-11-09 10:48:18,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:48:18,851 INFO L134 CoverageAnalysis]: Checked inductivity of 6472 backedges. 675 proven. 5550 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2021-11-09 10:48:18,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086485574] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:48:18,851 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:48:18,852 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 78 [2021-11-09 10:48:18,852 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394105611] [2021-11-09 10:48:18,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2021-11-09 10:48:18,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:48:18,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2021-11-09 10:48:18,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2021-11-09 10:48:18,854 INFO L87 Difference]: Start difference. First operand 187 states and 193 transitions. Second operand has 78 states, 78 states have (on average 2.08974358974359) internal successors, (163), 78 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:19,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:48:19,046 INFO L93 Difference]: Finished difference Result 226 states and 239 transitions. [2021-11-09 10:48:19,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-11-09 10:48:19,047 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 2.08974358974359) internal successors, (163), 78 states have internal predecessors, (163), 0 states have call successors, (0), 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 186 [2021-11-09 10:48:19,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:48:19,048 INFO L225 Difference]: With dead ends: 226 [2021-11-09 10:48:19,048 INFO L226 Difference]: Without dead ends: 189 [2021-11-09 10:48:19,048 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2021-11-09 10:48:19,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-11-09 10:48:19,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2021-11-09 10:48:19,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 1.0372340425531914) internal successors, (195), 188 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:19,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 195 transitions. [2021-11-09 10:48:19,069 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 195 transitions. Word has length 186 [2021-11-09 10:48:19,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:48:19,070 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 195 transitions. [2021-11-09 10:48:19,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 2.08974358974359) internal successors, (163), 78 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:19,070 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 195 transitions. [2021-11-09 10:48:19,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2021-11-09 10:48:19,071 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:48:19,072 INFO L513 BasicCegarLoop]: trace histogram [80, 75, 21, 5, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:48:19,108 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2021-11-09 10:48:19,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-11-09 10:48:19,288 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:48:19,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:48:19,288 INFO L85 PathProgramCache]: Analyzing trace with hash -1116264744, now seen corresponding path program 74 times [2021-11-09 10:48:19,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:48:19,288 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138541955] [2021-11-09 10:48:19,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:48:19,289 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:48:19,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:48:21,754 INFO L134 CoverageAnalysis]: Checked inductivity of 6631 backedges. 684 proven. 5700 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2021-11-09 10:48:21,754 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:48:21,755 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138541955] [2021-11-09 10:48:21,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138541955] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:48:21,755 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135020302] [2021-11-09 10:48:21,755 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 10:48:21,755 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:48:21,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:48:21,756 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:48:21,757 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2021-11-09 10:48:24,825 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 10:48:24,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:48:24,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 77 conjunts are in the unsatisfiable core [2021-11-09 10:48:24,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:48:25,326 INFO L134 CoverageAnalysis]: Checked inductivity of 6631 backedges. 684 proven. 5700 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2021-11-09 10:48:25,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135020302] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:48:25,327 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:48:25,327 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 79 [2021-11-09 10:48:25,327 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548718726] [2021-11-09 10:48:25,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2021-11-09 10:48:25,328 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:48:25,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2021-11-09 10:48:25,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2021-11-09 10:48:25,329 INFO L87 Difference]: Start difference. First operand 189 states and 195 transitions. Second operand has 79 states, 79 states have (on average 2.088607594936709) internal successors, (165), 79 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:25,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:48:25,557 INFO L93 Difference]: Finished difference Result 228 states and 241 transitions. [2021-11-09 10:48:25,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-11-09 10:48:25,558 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 2.088607594936709) internal successors, (165), 79 states have internal predecessors, (165), 0 states have call successors, (0), 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 188 [2021-11-09 10:48:25,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:48:25,559 INFO L225 Difference]: With dead ends: 228 [2021-11-09 10:48:25,559 INFO L226 Difference]: Without dead ends: 191 [2021-11-09 10:48:25,560 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2021-11-09 10:48:25,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-11-09 10:48:25,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2021-11-09 10:48:25,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 1.0368421052631578) internal successors, (197), 190 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:25,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 197 transitions. [2021-11-09 10:48:25,579 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 197 transitions. Word has length 188 [2021-11-09 10:48:25,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:48:25,579 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 197 transitions. [2021-11-09 10:48:25,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 2.088607594936709) internal successors, (165), 79 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:25,580 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 197 transitions. [2021-11-09 10:48:25,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-11-09 10:48:25,581 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:48:25,581 INFO L513 BasicCegarLoop]: trace histogram [81, 76, 21, 5, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:48:25,637 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2021-11-09 10:48:25,797 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:48:25,798 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:48:25,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:48:25,798 INFO L85 PathProgramCache]: Analyzing trace with hash 651850171, now seen corresponding path program 75 times [2021-11-09 10:48:25,798 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:48:25,798 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23046924] [2021-11-09 10:48:25,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:48:25,799 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:48:25,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:48:28,457 INFO L134 CoverageAnalysis]: Checked inductivity of 6792 backedges. 693 proven. 5852 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2021-11-09 10:48:28,458 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:48:28,458 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23046924] [2021-11-09 10:48:28,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23046924] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:48:28,458 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442472776] [2021-11-09 10:48:28,458 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 10:48:28,458 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:48:28,458 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:48:28,459 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:48:28,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2021-11-09 10:48:31,396 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-11-09 10:48:31,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:48:31,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-09 10:48:31,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:48:32,112 INFO L134 CoverageAnalysis]: Checked inductivity of 6792 backedges. 836 proven. 25 refuted. 0 times theorem prover too weak. 5931 trivial. 0 not checked. [2021-11-09 10:48:32,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442472776] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:48:32,112 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:48:32,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 8] total 85 [2021-11-09 10:48:32,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666903559] [2021-11-09 10:48:32,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2021-11-09 10:48:32,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:48:32,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2021-11-09 10:48:32,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2021-11-09 10:48:32,114 INFO L87 Difference]: Start difference. First operand 191 states and 197 transitions. Second operand has 85 states, 85 states have (on average 2.1058823529411765) internal successors, (179), 85 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:32,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:48:32,393 INFO L93 Difference]: Finished difference Result 233 states and 249 transitions. [2021-11-09 10:48:32,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-11-09 10:48:32,395 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 2.1058823529411765) internal successors, (179), 85 states have internal predecessors, (179), 0 states have call successors, (0), 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 190 [2021-11-09 10:48:32,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:48:32,397 INFO L225 Difference]: With dead ends: 233 [2021-11-09 10:48:32,397 INFO L226 Difference]: Without dead ends: 196 [2021-11-09 10:48:32,398 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2021-11-09 10:48:32,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-11-09 10:48:32,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 195. [2021-11-09 10:48:32,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 1.041237113402062) internal successors, (202), 194 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:32,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 202 transitions. [2021-11-09 10:48:32,422 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 202 transitions. Word has length 190 [2021-11-09 10:48:32,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:48:32,423 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 202 transitions. [2021-11-09 10:48:32,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 2.1058823529411765) internal successors, (179), 85 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:32,423 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 202 transitions. [2021-11-09 10:48:32,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2021-11-09 10:48:32,424 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:48:32,424 INFO L513 BasicCegarLoop]: trace histogram [83, 77, 21, 6, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:48:32,477 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2021-11-09 10:48:32,644 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-11-09 10:48:32,644 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:48:32,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:48:32,644 INFO L85 PathProgramCache]: Analyzing trace with hash 185817155, now seen corresponding path program 76 times [2021-11-09 10:48:32,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:48:32,644 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162794888] [2021-11-09 10:48:32,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:48:32,645 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:48:32,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:48:35,395 INFO L134 CoverageAnalysis]: Checked inductivity of 7120 backedges. 858 proven. 6006 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2021-11-09 10:48:35,395 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:48:35,396 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162794888] [2021-11-09 10:48:35,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162794888] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:48:35,396 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066883233] [2021-11-09 10:48:35,396 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 10:48:35,396 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:48:35,396 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:48:35,397 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:48:35,398 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2021-11-09 10:48:38,654 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 10:48:38,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:48:38,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 79 conjunts are in the unsatisfiable core [2021-11-09 10:48:38,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:48:39,154 INFO L134 CoverageAnalysis]: Checked inductivity of 7120 backedges. 858 proven. 6006 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2021-11-09 10:48:39,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066883233] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:48:39,154 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:48:39,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 81 [2021-11-09 10:48:39,154 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907175261] [2021-11-09 10:48:39,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2021-11-09 10:48:39,155 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:48:39,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2021-11-09 10:48:39,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2021-11-09 10:48:39,156 INFO L87 Difference]: Start difference. First operand 195 states and 202 transitions. Second operand has 81 states, 81 states have (on average 2.0864197530864197) internal successors, (169), 81 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:39,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:48:39,375 INFO L93 Difference]: Finished difference Result 236 states and 251 transitions. [2021-11-09 10:48:39,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-11-09 10:48:39,375 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 2.0864197530864197) internal successors, (169), 81 states have internal predecessors, (169), 0 states have call successors, (0), 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 194 [2021-11-09 10:48:39,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:48:39,376 INFO L225 Difference]: With dead ends: 236 [2021-11-09 10:48:39,376 INFO L226 Difference]: Without dead ends: 197 [2021-11-09 10:48:39,377 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2021-11-09 10:48:39,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-11-09 10:48:39,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 197. [2021-11-09 10:48:39,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 1.0408163265306123) internal successors, (204), 196 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:39,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 204 transitions. [2021-11-09 10:48:39,394 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 204 transitions. Word has length 194 [2021-11-09 10:48:39,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:48:39,394 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 204 transitions. [2021-11-09 10:48:39,394 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 2.0864197530864197) internal successors, (169), 81 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:39,394 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 204 transitions. [2021-11-09 10:48:39,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2021-11-09 10:48:39,395 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:48:39,395 INFO L513 BasicCegarLoop]: trace histogram [84, 78, 21, 6, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:48:39,425 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2021-11-09 10:48:39,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:48:39,596 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:48:39,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:48:39,596 INFO L85 PathProgramCache]: Analyzing trace with hash 327003366, now seen corresponding path program 77 times [2021-11-09 10:48:39,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:48:39,596 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578140506] [2021-11-09 10:48:39,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:48:39,597 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:48:39,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:48:41,968 INFO L134 CoverageAnalysis]: Checked inductivity of 7287 backedges. 869 proven. 6162 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2021-11-09 10:48:41,968 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:48:41,968 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578140506] [2021-11-09 10:48:41,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578140506] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:48:41,969 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188263379] [2021-11-09 10:48:41,969 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 10:48:41,969 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:48:41,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:48:41,970 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:48:41,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2021-11-09 10:48:45,225 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 85 check-sat command(s) [2021-11-09 10:48:45,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:48:45,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 80 conjunts are in the unsatisfiable core [2021-11-09 10:48:45,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:48:45,775 INFO L134 CoverageAnalysis]: Checked inductivity of 7287 backedges. 869 proven. 6162 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2021-11-09 10:48:45,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188263379] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:48:45,775 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:48:45,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 82 [2021-11-09 10:48:45,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037815696] [2021-11-09 10:48:45,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2021-11-09 10:48:45,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:48:45,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2021-11-09 10:48:45,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2021-11-09 10:48:45,778 INFO L87 Difference]: Start difference. First operand 197 states and 204 transitions. Second operand has 82 states, 82 states have (on average 2.0853658536585367) internal successors, (171), 82 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:45,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:48:45,988 INFO L93 Difference]: Finished difference Result 238 states and 253 transitions. [2021-11-09 10:48:45,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-11-09 10:48:45,988 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 2.0853658536585367) internal successors, (171), 82 states have internal predecessors, (171), 0 states have call successors, (0), 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 196 [2021-11-09 10:48:45,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:48:45,989 INFO L225 Difference]: With dead ends: 238 [2021-11-09 10:48:45,989 INFO L226 Difference]: Without dead ends: 199 [2021-11-09 10:48:45,990 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2021-11-09 10:48:45,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-11-09 10:48:46,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 199. [2021-11-09 10:48:46,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 1.0404040404040404) internal successors, (206), 198 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:46,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 206 transitions. [2021-11-09 10:48:46,005 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 206 transitions. Word has length 196 [2021-11-09 10:48:46,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:48:46,005 INFO L470 AbstractCegarLoop]: Abstraction has 199 states and 206 transitions. [2021-11-09 10:48:46,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 2.0853658536585367) internal successors, (171), 82 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:46,006 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 206 transitions. [2021-11-09 10:48:46,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2021-11-09 10:48:46,007 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:48:46,007 INFO L513 BasicCegarLoop]: trace histogram [85, 79, 21, 6, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:48:46,041 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2021-11-09 10:48:46,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,79 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:48:46,208 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:48:46,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:48:46,208 INFO L85 PathProgramCache]: Analyzing trace with hash -1432001335, now seen corresponding path program 78 times [2021-11-09 10:48:46,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:48:46,208 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449772594] [2021-11-09 10:48:46,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:48:46,209 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:48:46,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:48:48,804 INFO L134 CoverageAnalysis]: Checked inductivity of 7456 backedges. 880 proven. 6320 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2021-11-09 10:48:48,805 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:48:48,805 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449772594] [2021-11-09 10:48:48,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449772594] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:48:48,805 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404472466] [2021-11-09 10:48:48,805 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 10:48:48,805 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:48:48,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:48:48,810 INFO L229 MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:48:48,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2021-11-09 10:48:52,088 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2021-11-09 10:48:52,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:48:52,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-09 10:48:52,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:48:54,237 INFO L134 CoverageAnalysis]: Checked inductivity of 7456 backedges. 905 proven. 231 refuted. 0 times theorem prover too weak. 6320 trivial. 0 not checked. [2021-11-09 10:48:54,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404472466] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:48:54,238 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:48:54,238 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 24] total 104 [2021-11-09 10:48:54,238 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874741092] [2021-11-09 10:48:54,239 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2021-11-09 10:48:54,239 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:48:54,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2021-11-09 10:48:54,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3596, Invalid=7116, Unknown=0, NotChecked=0, Total=10712 [2021-11-09 10:48:54,241 INFO L87 Difference]: Start difference. First operand 199 states and 206 transitions. Second operand has 104 states, 104 states have (on average 1.9903846153846154) internal successors, (207), 104 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:57,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:48:57,810 INFO L93 Difference]: Finished difference Result 283 states and 320 transitions. [2021-11-09 10:48:57,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2021-11-09 10:48:57,810 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 1.9903846153846154) internal successors, (207), 104 states have internal predecessors, (207), 0 states have call successors, (0), 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 198 [2021-11-09 10:48:57,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:48:57,812 INFO L225 Difference]: With dead ends: 283 [2021-11-09 10:48:57,812 INFO L226 Difference]: Without dead ends: 244 [2021-11-09 10:48:57,814 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 359 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 182 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5478 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=11436, Invalid=22236, Unknown=0, NotChecked=0, Total=33672 [2021-11-09 10:48:57,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-11-09 10:48:57,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 202. [2021-11-09 10:48:57,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 1.0398009950248757) internal successors, (209), 201 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) [2021-11-09 10:48:57,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 209 transitions. [2021-11-09 10:48:57,842 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 209 transitions. Word has length 198 [2021-11-09 10:48:57,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:48:57,843 INFO L470 AbstractCegarLoop]: Abstraction has 202 states and 209 transitions. [2021-11-09 10:48:57,843 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 1.9903846153846154) internal successors, (207), 104 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:57,843 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 209 transitions. [2021-11-09 10:48:57,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2021-11-09 10:48:57,845 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:48:57,845 INFO L513 BasicCegarLoop]: trace histogram [86, 80, 22, 6, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:48:57,901 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2021-11-09 10:48:58,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,80 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:48:58,072 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:48:58,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:48:58,072 INFO L85 PathProgramCache]: Analyzing trace with hash -1053772032, now seen corresponding path program 79 times [2021-11-09 10:48:58,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:48:58,073 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532867778] [2021-11-09 10:48:58,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:48:58,073 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:48:58,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:49:00,879 INFO L134 CoverageAnalysis]: Checked inductivity of 7649 backedges. 891 proven. 6480 refuted. 0 times theorem prover too weak. 278 trivial. 0 not checked. [2021-11-09 10:49:00,880 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:49:00,880 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532867778] [2021-11-09 10:49:00,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532867778] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:49:00,880 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218142652] [2021-11-09 10:49:00,880 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 10:49:00,880 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:49:00,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:49:00,881 INFO L229 MonitoredProcess]: Starting monitored process 81 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:49:00,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2021-11-09 10:49:04,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:49:04,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 512 conjuncts, 82 conjunts are in the unsatisfiable core [2021-11-09 10:49:04,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:49:05,256 INFO L134 CoverageAnalysis]: Checked inductivity of 7649 backedges. 891 proven. 6480 refuted. 0 times theorem prover too weak. 278 trivial. 0 not checked. [2021-11-09 10:49:05,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218142652] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:49:05,256 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:49:05,256 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 84 [2021-11-09 10:49:05,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857825084] [2021-11-09 10:49:05,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2021-11-09 10:49:05,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:49:05,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2021-11-09 10:49:05,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2021-11-09 10:49:05,258 INFO L87 Difference]: Start difference. First operand 202 states and 209 transitions. Second operand has 84 states, 84 states have (on average 2.0833333333333335) internal successors, (175), 84 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:49:05,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:49:05,492 INFO L93 Difference]: Finished difference Result 244 states and 259 transitions. [2021-11-09 10:49:05,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-11-09 10:49:05,492 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 2.0833333333333335) internal successors, (175), 84 states have internal predecessors, (175), 0 states have call successors, (0), 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 201 [2021-11-09 10:49:05,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:49:05,494 INFO L225 Difference]: With dead ends: 244 [2021-11-09 10:49:05,494 INFO L226 Difference]: Without dead ends: 204 [2021-11-09 10:49:05,494 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2021-11-09 10:49:05,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-11-09 10:49:05,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 204. [2021-11-09 10:49:05,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 203 states have (on average 1.0394088669950738) internal successors, (211), 203 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:49:05,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 211 transitions. [2021-11-09 10:49:05,513 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 211 transitions. Word has length 201 [2021-11-09 10:49:05,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:49:05,513 INFO L470 AbstractCegarLoop]: Abstraction has 204 states and 211 transitions. [2021-11-09 10:49:05,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 2.0833333333333335) internal successors, (175), 84 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:49:05,514 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 211 transitions. [2021-11-09 10:49:05,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2021-11-09 10:49:05,515 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:49:05,515 INFO L513 BasicCegarLoop]: trace histogram [87, 81, 22, 6, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:49:05,558 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2021-11-09 10:49:05,732 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2021-11-09 10:49:05,732 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:49:05,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:49:05,732 INFO L85 PathProgramCache]: Analyzing trace with hash 1419736317, now seen corresponding path program 80 times [2021-11-09 10:49:05,733 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:49:05,733 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859704859] [2021-11-09 10:49:05,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:49:05,733 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:49:05,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:49:08,666 INFO L134 CoverageAnalysis]: Checked inductivity of 7822 backedges. 902 proven. 6642 refuted. 0 times theorem prover too weak. 278 trivial. 0 not checked. [2021-11-09 10:49:08,666 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:49:08,666 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859704859] [2021-11-09 10:49:08,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859704859] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:49:08,667 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290444175] [2021-11-09 10:49:08,667 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 10:49:08,667 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:49:08,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:49:08,668 INFO L229 MonitoredProcess]: Starting monitored process 82 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:49:08,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2021-11-09 10:49:12,540 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 10:49:12,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:49:12,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 516 conjuncts, 83 conjunts are in the unsatisfiable core [2021-11-09 10:49:12,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:49:13,049 INFO L134 CoverageAnalysis]: Checked inductivity of 7822 backedges. 902 proven. 6642 refuted. 0 times theorem prover too weak. 278 trivial. 0 not checked. [2021-11-09 10:49:13,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290444175] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:49:13,049 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:49:13,049 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 85 [2021-11-09 10:49:13,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475407638] [2021-11-09 10:49:13,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2021-11-09 10:49:13,050 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:49:13,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2021-11-09 10:49:13,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2021-11-09 10:49:13,051 INFO L87 Difference]: Start difference. First operand 204 states and 211 transitions. Second operand has 85 states, 85 states have (on average 2.0823529411764707) internal successors, (177), 85 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:49:13,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:49:13,286 INFO L93 Difference]: Finished difference Result 246 states and 261 transitions. [2021-11-09 10:49:13,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-11-09 10:49:13,286 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 2.0823529411764707) internal successors, (177), 85 states have internal predecessors, (177), 0 states have call successors, (0), 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 203 [2021-11-09 10:49:13,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:49:13,287 INFO L225 Difference]: With dead ends: 246 [2021-11-09 10:49:13,287 INFO L226 Difference]: Without dead ends: 206 [2021-11-09 10:49:13,288 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2021-11-09 10:49:13,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-11-09 10:49:13,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 206. [2021-11-09 10:49:13,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 205 states have (on average 1.0390243902439025) internal successors, (213), 205 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:49:13,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 213 transitions. [2021-11-09 10:49:13,302 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 213 transitions. Word has length 203 [2021-11-09 10:49:13,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:49:13,303 INFO L470 AbstractCegarLoop]: Abstraction has 206 states and 213 transitions. [2021-11-09 10:49:13,303 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 2.0823529411764707) internal successors, (177), 85 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:49:13,303 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 213 transitions. [2021-11-09 10:49:13,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2021-11-09 10:49:13,304 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:49:13,304 INFO L513 BasicCegarLoop]: trace histogram [88, 82, 22, 6, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:49:13,357 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2021-11-09 10:49:13,532 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,82 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:49:13,532 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:49:13,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:49:13,532 INFO L85 PathProgramCache]: Analyzing trace with hash -950622278, now seen corresponding path program 81 times [2021-11-09 10:49:13,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:49:13,532 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400290028] [2021-11-09 10:49:13,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:49:13,533 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:49:13,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:49:16,270 INFO L134 CoverageAnalysis]: Checked inductivity of 7997 backedges. 913 proven. 6806 refuted. 0 times theorem prover too weak. 278 trivial. 0 not checked. [2021-11-09 10:49:16,270 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:49:16,270 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400290028] [2021-11-09 10:49:16,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400290028] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:49:16,270 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419164997] [2021-11-09 10:49:16,271 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 10:49:16,271 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:49:16,271 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:49:16,272 INFO L229 MonitoredProcess]: Starting monitored process 83 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:49:16,273 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2021-11-09 10:49:19,813 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-11-09 10:49:19,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:49:19,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-09 10:49:19,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:49:22,038 INFO L134 CoverageAnalysis]: Checked inductivity of 7997 backedges. 938 proven. 253 refuted. 0 times theorem prover too weak. 6806 trivial. 0 not checked. [2021-11-09 10:49:22,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419164997] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:49:22,038 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:49:22,038 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 25] total 108 [2021-11-09 10:49:22,039 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705728699] [2021-11-09 10:49:22,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2021-11-09 10:49:22,039 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:49:22,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2021-11-09 10:49:22,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3869, Invalid=7687, Unknown=0, NotChecked=0, Total=11556 [2021-11-09 10:49:22,042 INFO L87 Difference]: Start difference. First operand 206 states and 213 transitions. Second operand has 108 states, 108 states have (on average 1.9814814814814814) internal successors, (214), 108 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:49:25,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:49:25,765 INFO L93 Difference]: Finished difference Result 291 states and 328 transitions. [2021-11-09 10:49:25,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2021-11-09 10:49:25,765 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 108 states have (on average 1.9814814814814814) internal successors, (214), 108 states have internal predecessors, (214), 0 states have call successors, (0), 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 205 [2021-11-09 10:49:25,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:49:25,767 INFO L225 Difference]: With dead ends: 291 [2021-11-09 10:49:25,767 INFO L226 Difference]: Without dead ends: 251 [2021-11-09 10:49:25,769 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5896 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=12335, Invalid=23955, Unknown=0, NotChecked=0, Total=36290 [2021-11-09 10:49:25,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-11-09 10:49:25,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 209. [2021-11-09 10:49:25,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 1.0384615384615385) internal successors, (216), 208 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:49:25,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 216 transitions. [2021-11-09 10:49:25,785 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 216 transitions. Word has length 205 [2021-11-09 10:49:25,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:49:25,786 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 216 transitions. [2021-11-09 10:49:25,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 108 states, 108 states have (on average 1.9814814814814814) internal successors, (214), 108 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:49:25,786 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 216 transitions. [2021-11-09 10:49:25,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2021-11-09 10:49:25,787 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:49:25,787 INFO L513 BasicCegarLoop]: trace histogram [89, 83, 23, 6, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:49:25,819 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2021-11-09 10:49:25,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,83 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:49:25,988 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:49:25,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:49:25,988 INFO L85 PathProgramCache]: Analyzing trace with hash -1198444267, now seen corresponding path program 82 times [2021-11-09 10:49:25,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:49:25,988 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147733374] [2021-11-09 10:49:25,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:49:25,989 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:49:26,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:49:28,923 INFO L134 CoverageAnalysis]: Checked inductivity of 8197 backedges. 924 proven. 6972 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2021-11-09 10:49:28,923 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:49:28,923 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147733374] [2021-11-09 10:49:28,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147733374] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:49:28,924 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034295671] [2021-11-09 10:49:28,924 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 10:49:28,924 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:49:28,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:49:28,926 INFO L229 MonitoredProcess]: Starting monitored process 84 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:49:28,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2021-11-09 10:49:32,758 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 10:49:32,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:49:32,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 529 conjuncts, 85 conjunts are in the unsatisfiable core [2021-11-09 10:49:32,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:49:33,312 INFO L134 CoverageAnalysis]: Checked inductivity of 8197 backedges. 924 proven. 6972 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2021-11-09 10:49:33,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034295671] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:49:33,312 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:49:33,312 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 87 [2021-11-09 10:49:33,313 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775111086] [2021-11-09 10:49:33,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2021-11-09 10:49:33,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:49:33,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2021-11-09 10:49:33,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2021-11-09 10:49:33,315 INFO L87 Difference]: Start difference. First operand 209 states and 216 transitions. Second operand has 87 states, 87 states have (on average 2.0804597701149423) internal successors, (181), 87 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:49:33,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:49:33,643 INFO L93 Difference]: Finished difference Result 252 states and 267 transitions. [2021-11-09 10:49:33,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-11-09 10:49:33,644 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 2.0804597701149423) internal successors, (181), 87 states have internal predecessors, (181), 0 states have call successors, (0), 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 208 [2021-11-09 10:49:33,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:49:33,646 INFO L225 Difference]: With dead ends: 252 [2021-11-09 10:49:33,646 INFO L226 Difference]: Without dead ends: 211 [2021-11-09 10:49:33,647 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2021-11-09 10:49:33,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-11-09 10:49:33,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 211. [2021-11-09 10:49:33,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 1.0380952380952382) internal successors, (218), 210 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:49:33,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 218 transitions. [2021-11-09 10:49:33,677 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 218 transitions. Word has length 208 [2021-11-09 10:49:33,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:49:33,677 INFO L470 AbstractCegarLoop]: Abstraction has 211 states and 218 transitions. [2021-11-09 10:49:33,677 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 2.0804597701149423) internal successors, (181), 87 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:49:33,678 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 218 transitions. [2021-11-09 10:49:33,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2021-11-09 10:49:33,679 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:49:33,679 INFO L513 BasicCegarLoop]: trace histogram [90, 84, 23, 6, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:49:33,737 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2021-11-09 10:49:33,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2021-11-09 10:49:33,894 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:49:33,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:49:33,894 INFO L85 PathProgramCache]: Analyzing trace with hash -183686024, now seen corresponding path program 83 times [2021-11-09 10:49:33,894 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:49:33,894 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677680140] [2021-11-09 10:49:33,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:49:33,895 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:49:34,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:49:36,900 INFO L134 CoverageAnalysis]: Checked inductivity of 8376 backedges. 935 proven. 7140 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2021-11-09 10:49:36,901 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:49:36,901 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677680140] [2021-11-09 10:49:36,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677680140] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:49:36,901 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413286777] [2021-11-09 10:49:36,901 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 10:49:36,901 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:49:36,901 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:49:36,904 INFO L229 MonitoredProcess]: Starting monitored process 85 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:49:36,906 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2021-11-09 10:49:41,080 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 91 check-sat command(s) [2021-11-09 10:49:41,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:49:41,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 533 conjuncts, 86 conjunts are in the unsatisfiable core [2021-11-09 10:49:41,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:49:41,719 INFO L134 CoverageAnalysis]: Checked inductivity of 8376 backedges. 935 proven. 7140 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2021-11-09 10:49:41,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413286777] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:49:41,719 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:49:41,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 88 [2021-11-09 10:49:41,720 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463926053] [2021-11-09 10:49:41,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2021-11-09 10:49:41,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:49:41,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2021-11-09 10:49:41,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2021-11-09 10:49:41,722 INFO L87 Difference]: Start difference. First operand 211 states and 218 transitions. Second operand has 88 states, 88 states have (on average 2.0795454545454546) internal successors, (183), 88 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:49:41,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:49:41,982 INFO L93 Difference]: Finished difference Result 254 states and 269 transitions. [2021-11-09 10:49:41,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-11-09 10:49:41,982 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 2.0795454545454546) internal successors, (183), 88 states have internal predecessors, (183), 0 states have call successors, (0), 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 210 [2021-11-09 10:49:41,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:49:41,984 INFO L225 Difference]: With dead ends: 254 [2021-11-09 10:49:41,984 INFO L226 Difference]: Without dead ends: 213 [2021-11-09 10:49:41,984 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2021-11-09 10:49:41,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-11-09 10:49:42,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 213. [2021-11-09 10:49:42,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 1.0377358490566038) internal successors, (220), 212 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:49:42,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 220 transitions. [2021-11-09 10:49:42,014 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 220 transitions. Word has length 210 [2021-11-09 10:49:42,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:49:42,015 INFO L470 AbstractCegarLoop]: Abstraction has 213 states and 220 transitions. [2021-11-09 10:49:42,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 2.0795454545454546) internal successors, (183), 88 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:49:42,015 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 220 transitions. [2021-11-09 10:49:42,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2021-11-09 10:49:42,016 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:49:42,017 INFO L513 BasicCegarLoop]: trace histogram [91, 85, 23, 6, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:49:42,059 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2021-11-09 10:49:42,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-11-09 10:49:42,228 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:49:42,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:49:42,228 INFO L85 PathProgramCache]: Analyzing trace with hash 41409307, now seen corresponding path program 84 times [2021-11-09 10:49:42,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:49:42,229 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289757709] [2021-11-09 10:49:42,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:49:42,229 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:49:42,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:49:45,456 INFO L134 CoverageAnalysis]: Checked inductivity of 8557 backedges. 946 proven. 7310 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2021-11-09 10:49:45,456 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:49:45,456 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289757709] [2021-11-09 10:49:45,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289757709] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:49:45,457 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564175781] [2021-11-09 10:49:45,457 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 10:49:45,457 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:49:45,457 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:49:45,458 INFO L229 MonitoredProcess]: Starting monitored process 86 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:49:45,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2021-11-09 10:49:49,643 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2021-11-09 10:49:49,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:49:49,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-09 10:49:49,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:49:52,094 INFO L134 CoverageAnalysis]: Checked inductivity of 8557 backedges. 971 proven. 276 refuted. 0 times theorem prover too weak. 7310 trivial. 0 not checked. [2021-11-09 10:49:52,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564175781] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:49:52,094 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:49:52,094 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 26] total 112 [2021-11-09 10:49:52,094 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320543345] [2021-11-09 10:49:52,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 112 states [2021-11-09 10:49:52,095 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:49:52,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2021-11-09 10:49:52,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4152, Invalid=8280, Unknown=0, NotChecked=0, Total=12432 [2021-11-09 10:49:52,097 INFO L87 Difference]: Start difference. First operand 213 states and 220 transitions. Second operand has 112 states, 112 states have (on average 1.9732142857142858) internal successors, (221), 112 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:49:56,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:49:56,487 INFO L93 Difference]: Finished difference Result 299 states and 336 transitions. [2021-11-09 10:49:56,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2021-11-09 10:49:56,488 INFO L78 Accepts]: Start accepts. Automaton has has 112 states, 112 states have (on average 1.9732142857142858) internal successors, (221), 112 states have internal predecessors, (221), 0 states have call successors, (0), 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 212 [2021-11-09 10:49:56,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:49:56,489 INFO L225 Difference]: With dead ends: 299 [2021-11-09 10:49:56,489 INFO L226 Difference]: Without dead ends: 258 [2021-11-09 10:49:56,491 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 385 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 196 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6329 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=13268, Invalid=25738, Unknown=0, NotChecked=0, Total=39006 [2021-11-09 10:49:56,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2021-11-09 10:49:56,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 216. [2021-11-09 10:49:56,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 1.0372093023255815) internal successors, (223), 215 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:49:56,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 223 transitions. [2021-11-09 10:49:56,514 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 223 transitions. Word has length 212 [2021-11-09 10:49:56,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:49:56,514 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 223 transitions. [2021-11-09 10:49:56,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 112 states, 112 states have (on average 1.9732142857142858) internal successors, (221), 112 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:49:56,515 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 223 transitions. [2021-11-09 10:49:56,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2021-11-09 10:49:56,516 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:49:56,516 INFO L513 BasicCegarLoop]: trace histogram [92, 86, 24, 6, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:49:56,562 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Ended with exit code 0 [2021-11-09 10:49:56,732 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-11-09 10:49:56,732 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:49:56,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:49:56,732 INFO L85 PathProgramCache]: Analyzing trace with hash -1638556626, now seen corresponding path program 85 times [2021-11-09 10:49:56,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:49:56,732 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351595199] [2021-11-09 10:49:56,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:49:56,733 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:49:56,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:50:00,015 INFO L134 CoverageAnalysis]: Checked inductivity of 8764 backedges. 957 proven. 7482 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2021-11-09 10:50:00,015 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:50:00,015 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351595199] [2021-11-09 10:50:00,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351595199] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:50:00,016 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513048333] [2021-11-09 10:50:00,016 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 10:50:00,016 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:50:00,016 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:50:00,017 INFO L229 MonitoredProcess]: Starting monitored process 87 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:50:00,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2021-11-09 10:50:04,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:50:04,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 88 conjunts are in the unsatisfiable core [2021-11-09 10:50:04,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:50:05,101 INFO L134 CoverageAnalysis]: Checked inductivity of 8764 backedges. 957 proven. 7482 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2021-11-09 10:50:05,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513048333] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:50:05,102 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:50:05,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 90 [2021-11-09 10:50:05,102 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398924688] [2021-11-09 10:50:05,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2021-11-09 10:50:05,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:50:05,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2021-11-09 10:50:05,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2021-11-09 10:50:05,104 INFO L87 Difference]: Start difference. First operand 216 states and 223 transitions. Second operand has 90 states, 90 states have (on average 2.077777777777778) internal successors, (187), 90 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:50:05,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:50:05,364 INFO L93 Difference]: Finished difference Result 260 states and 275 transitions. [2021-11-09 10:50:05,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-11-09 10:50:05,365 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 2.077777777777778) internal successors, (187), 90 states have internal predecessors, (187), 0 states have call successors, (0), 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 215 [2021-11-09 10:50:05,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:50:05,366 INFO L225 Difference]: With dead ends: 260 [2021-11-09 10:50:05,366 INFO L226 Difference]: Without dead ends: 218 [2021-11-09 10:50:05,367 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2021-11-09 10:50:05,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-11-09 10:50:05,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 218. [2021-11-09 10:50:05,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 1.0368663594470047) internal successors, (225), 217 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:50:05,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 225 transitions. [2021-11-09 10:50:05,386 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 225 transitions. Word has length 215 [2021-11-09 10:50:05,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:50:05,386 INFO L470 AbstractCegarLoop]: Abstraction has 218 states and 225 transitions. [2021-11-09 10:50:05,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 2.077777777777778) internal successors, (187), 90 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:50:05,387 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 225 transitions. [2021-11-09 10:50:05,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2021-11-09 10:50:05,387 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:50:05,388 INFO L513 BasicCegarLoop]: trace histogram [93, 87, 24, 6, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:50:05,429 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2021-11-09 10:50:05,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-11-09 10:50:05,588 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:50:05,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:50:05,589 INFO L85 PathProgramCache]: Analyzing trace with hash 1687001963, now seen corresponding path program 86 times [2021-11-09 10:50:05,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:50:05,589 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132228092] [2021-11-09 10:50:05,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:50:05,589 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:50:05,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:50:08,969 INFO L134 CoverageAnalysis]: Checked inductivity of 8949 backedges. 968 proven. 7656 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2021-11-09 10:50:08,969 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:50:08,969 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132228092] [2021-11-09 10:50:08,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132228092] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:50:08,969 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869408315] [2021-11-09 10:50:08,969 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 10:50:08,969 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:50:08,970 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:50:08,970 INFO L229 MonitoredProcess]: Starting monitored process 88 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:50:08,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2021-11-09 10:50:13,408 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 10:50:13,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:50:13,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 89 conjunts are in the unsatisfiable core [2021-11-09 10:50:13,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:50:14,045 INFO L134 CoverageAnalysis]: Checked inductivity of 8949 backedges. 968 proven. 7656 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2021-11-09 10:50:14,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869408315] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:50:14,045 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:50:14,045 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90] total 91 [2021-11-09 10:50:14,045 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8387714] [2021-11-09 10:50:14,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2021-11-09 10:50:14,046 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:50:14,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2021-11-09 10:50:14,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2021-11-09 10:50:14,048 INFO L87 Difference]: Start difference. First operand 218 states and 225 transitions. Second operand has 91 states, 91 states have (on average 2.076923076923077) internal successors, (189), 91 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:50:14,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:50:14,315 INFO L93 Difference]: Finished difference Result 262 states and 277 transitions. [2021-11-09 10:50:14,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-11-09 10:50:14,315 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 2.076923076923077) internal successors, (189), 91 states have internal predecessors, (189), 0 states have call successors, (0), 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 217 [2021-11-09 10:50:14,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:50:14,316 INFO L225 Difference]: With dead ends: 262 [2021-11-09 10:50:14,317 INFO L226 Difference]: Without dead ends: 220 [2021-11-09 10:50:14,317 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2021-11-09 10:50:14,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-11-09 10:50:14,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 220. [2021-11-09 10:50:14,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 1.0365296803652968) internal successors, (227), 219 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:50:14,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 227 transitions. [2021-11-09 10:50:14,350 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 227 transitions. Word has length 217 [2021-11-09 10:50:14,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:50:14,350 INFO L470 AbstractCegarLoop]: Abstraction has 220 states and 227 transitions. [2021-11-09 10:50:14,351 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 2.076923076923077) internal successors, (189), 91 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:50:14,351 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 227 transitions. [2021-11-09 10:50:14,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2021-11-09 10:50:14,352 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:50:14,353 INFO L513 BasicCegarLoop]: trace histogram [94, 88, 24, 6, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:50:14,406 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Ended with exit code 0 [2021-11-09 10:50:14,570 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,88 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:50:14,570 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:50:14,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:50:14,570 INFO L85 PathProgramCache]: Analyzing trace with hash 2093137768, now seen corresponding path program 87 times [2021-11-09 10:50:14,570 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:50:14,570 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464076194] [2021-11-09 10:50:14,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:50:14,571 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:50:14,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:50:18,023 INFO L134 CoverageAnalysis]: Checked inductivity of 9136 backedges. 979 proven. 7832 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2021-11-09 10:50:18,024 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:50:18,024 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464076194] [2021-11-09 10:50:18,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464076194] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:50:18,024 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005344591] [2021-11-09 10:50:18,024 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 10:50:18,024 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:50:18,024 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:50:18,025 INFO L229 MonitoredProcess]: Starting monitored process 89 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:50:18,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2021-11-09 10:50:22,579 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-11-09 10:50:22,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:50:22,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-09 10:50:22,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:50:25,124 INFO L134 CoverageAnalysis]: Checked inductivity of 9136 backedges. 1004 proven. 300 refuted. 0 times theorem prover too weak. 7832 trivial. 0 not checked. [2021-11-09 10:50:25,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005344591] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:50:25,124 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:50:25,124 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 27] total 116 [2021-11-09 10:50:25,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840992203] [2021-11-09 10:50:25,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2021-11-09 10:50:25,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:50:25,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2021-11-09 10:50:25,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4445, Invalid=8895, Unknown=0, NotChecked=0, Total=13340 [2021-11-09 10:50:25,127 INFO L87 Difference]: Start difference. First operand 220 states and 227 transitions. Second operand has 116 states, 116 states have (on average 1.9655172413793103) internal successors, (228), 116 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:50:29,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:50:29,706 INFO L93 Difference]: Finished difference Result 307 states and 344 transitions. [2021-11-09 10:50:29,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2021-11-09 10:50:29,706 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 116 states have (on average 1.9655172413793103) internal successors, (228), 116 states have internal predecessors, (228), 0 states have call successors, (0), 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 219 [2021-11-09 10:50:29,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:50:29,708 INFO L225 Difference]: With dead ends: 307 [2021-11-09 10:50:29,708 INFO L226 Difference]: Without dead ends: 265 [2021-11-09 10:50:29,710 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 398 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6777 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=14235, Invalid=27585, Unknown=0, NotChecked=0, Total=41820 [2021-11-09 10:50:29,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2021-11-09 10:50:29,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 223. [2021-11-09 10:50:29,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 1.0360360360360361) internal successors, (230), 222 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:50:29,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 230 transitions. [2021-11-09 10:50:29,730 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 230 transitions. Word has length 219 [2021-11-09 10:50:29,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:50:29,731 INFO L470 AbstractCegarLoop]: Abstraction has 223 states and 230 transitions. [2021-11-09 10:50:29,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 116 states have (on average 1.9655172413793103) internal successors, (228), 116 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:50:29,731 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 230 transitions. [2021-11-09 10:50:29,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2021-11-09 10:50:29,732 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:50:29,732 INFO L513 BasicCegarLoop]: trace histogram [95, 89, 25, 6, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:50:29,770 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Ended with exit code 0 [2021-11-09 10:50:29,932 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,89 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:50:29,933 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:50:29,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:50:29,933 INFO L85 PathProgramCache]: Analyzing trace with hash 733320679, now seen corresponding path program 88 times [2021-11-09 10:50:29,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:50:29,933 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398485374] [2021-11-09 10:50:29,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:50:29,934 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:50:30,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:50:33,373 INFO L134 CoverageAnalysis]: Checked inductivity of 9350 backedges. 990 proven. 8010 refuted. 0 times theorem prover too weak. 350 trivial. 0 not checked. [2021-11-09 10:50:33,374 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:50:33,374 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398485374] [2021-11-09 10:50:33,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398485374] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:50:33,374 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868156182] [2021-11-09 10:50:33,374 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 10:50:33,374 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:50:33,375 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:50:33,376 INFO L229 MonitoredProcess]: Starting monitored process 90 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:50:33,396 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2021-11-09 10:50:38,006 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 10:50:38,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:50:38,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 91 conjunts are in the unsatisfiable core [2021-11-09 10:50:38,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:50:38,644 INFO L134 CoverageAnalysis]: Checked inductivity of 9350 backedges. 990 proven. 8010 refuted. 0 times theorem prover too weak. 350 trivial. 0 not checked. [2021-11-09 10:50:38,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868156182] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:50:38,644 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:50:38,645 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 92] total 93 [2021-11-09 10:50:38,645 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246377326] [2021-11-09 10:50:38,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2021-11-09 10:50:38,645 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:50:38,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2021-11-09 10:50:38,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2021-11-09 10:50:38,647 INFO L87 Difference]: Start difference. First operand 223 states and 230 transitions. Second operand has 93 states, 93 states have (on average 2.075268817204301) internal successors, (193), 93 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:50:38,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:50:38,900 INFO L93 Difference]: Finished difference Result 268 states and 283 transitions. [2021-11-09 10:50:38,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-11-09 10:50:38,900 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 2.075268817204301) internal successors, (193), 93 states have internal predecessors, (193), 0 states have call successors, (0), 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 222 [2021-11-09 10:50:38,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:50:38,902 INFO L225 Difference]: With dead ends: 268 [2021-11-09 10:50:38,902 INFO L226 Difference]: Without dead ends: 225 [2021-11-09 10:50:38,902 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2021-11-09 10:50:38,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-11-09 10:50:38,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 225. [2021-11-09 10:50:38,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 1.0357142857142858) internal successors, (232), 224 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:50:38,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 232 transitions. [2021-11-09 10:50:38,935 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 232 transitions. Word has length 222 [2021-11-09 10:50:38,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:50:38,936 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 232 transitions. [2021-11-09 10:50:38,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 2.075268817204301) internal successors, (193), 93 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:50:38,936 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 232 transitions. [2021-11-09 10:50:38,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2021-11-09 10:50:38,938 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:50:38,938 INFO L513 BasicCegarLoop]: trace histogram [96, 90, 25, 6, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:50:38,980 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Ended with exit code 0 [2021-11-09 10:50:39,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,90 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:50:39,148 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:50:39,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:50:39,148 INFO L85 PathProgramCache]: Analyzing trace with hash 1442342922, now seen corresponding path program 89 times [2021-11-09 10:50:39,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:50:39,148 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884309678] [2021-11-09 10:50:39,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:50:39,149 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:50:39,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:50:42,658 INFO L134 CoverageAnalysis]: Checked inductivity of 9541 backedges. 1001 proven. 8190 refuted. 0 times theorem prover too weak. 350 trivial. 0 not checked. [2021-11-09 10:50:42,658 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:50:42,658 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884309678] [2021-11-09 10:50:42,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884309678] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:50:42,658 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768639771] [2021-11-09 10:50:42,658 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 10:50:42,659 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:50:42,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:50:42,659 INFO L229 MonitoredProcess]: Starting monitored process 91 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:50:42,662 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2021-11-09 10:50:47,402 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 97 check-sat command(s) [2021-11-09 10:50:47,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:50:47,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 567 conjuncts, 92 conjunts are in the unsatisfiable core [2021-11-09 10:50:47,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:50:48,115 INFO L134 CoverageAnalysis]: Checked inductivity of 9541 backedges. 1001 proven. 8190 refuted. 0 times theorem prover too weak. 350 trivial. 0 not checked. [2021-11-09 10:50:48,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768639771] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:50:48,115 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:50:48,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 94 [2021-11-09 10:50:48,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767347512] [2021-11-09 10:50:48,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2021-11-09 10:50:48,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:50:48,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2021-11-09 10:50:48,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2021-11-09 10:50:48,117 INFO L87 Difference]: Start difference. First operand 225 states and 232 transitions. Second operand has 94 states, 94 states have (on average 2.074468085106383) internal successors, (195), 94 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:50:48,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:50:48,390 INFO L93 Difference]: Finished difference Result 270 states and 285 transitions. [2021-11-09 10:50:48,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-11-09 10:50:48,390 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 2.074468085106383) internal successors, (195), 94 states have internal predecessors, (195), 0 states have call successors, (0), 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 224 [2021-11-09 10:50:48,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:50:48,392 INFO L225 Difference]: With dead ends: 270 [2021-11-09 10:50:48,392 INFO L226 Difference]: Without dead ends: 227 [2021-11-09 10:50:48,392 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2021-11-09 10:50:48,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-11-09 10:50:48,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 227. [2021-11-09 10:50:48,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 1.0353982300884956) internal successors, (234), 226 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:50:48,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 234 transitions. [2021-11-09 10:50:48,413 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 234 transitions. Word has length 224 [2021-11-09 10:50:48,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:50:48,413 INFO L470 AbstractCegarLoop]: Abstraction has 227 states and 234 transitions. [2021-11-09 10:50:48,413 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 2.074468085106383) internal successors, (195), 94 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:50:48,413 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 234 transitions. [2021-11-09 10:50:48,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2021-11-09 10:50:48,414 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:50:48,414 INFO L513 BasicCegarLoop]: trace histogram [97, 91, 25, 6, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:50:48,452 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Forceful destruction successful, exit code 0 [2021-11-09 10:50:48,614 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,91 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:50:48,615 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:50:48,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:50:48,615 INFO L85 PathProgramCache]: Analyzing trace with hash -87081619, now seen corresponding path program 90 times [2021-11-09 10:50:48,615 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:50:48,615 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766898450] [2021-11-09 10:50:48,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:50:48,615 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:50:48,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:50:51,974 INFO L134 CoverageAnalysis]: Checked inductivity of 9734 backedges. 1012 proven. 8372 refuted. 0 times theorem prover too weak. 350 trivial. 0 not checked. [2021-11-09 10:50:51,974 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:50:51,974 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766898450] [2021-11-09 10:50:51,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766898450] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:50:51,974 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385197458] [2021-11-09 10:50:51,974 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 10:50:51,975 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:50:51,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:50:51,975 INFO L229 MonitoredProcess]: Starting monitored process 92 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:50:51,976 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2021-11-09 10:50:56,690 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2021-11-09 10:50:56,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:50:56,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-09 10:50:56,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:50:59,400 INFO L134 CoverageAnalysis]: Checked inductivity of 9734 backedges. 1037 proven. 325 refuted. 0 times theorem prover too weak. 8372 trivial. 0 not checked. [2021-11-09 10:50:59,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385197458] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:50:59,401 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:50:59,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 28] total 120 [2021-11-09 10:50:59,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641217931] [2021-11-09 10:50:59,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 120 states [2021-11-09 10:50:59,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:50:59,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2021-11-09 10:50:59,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4748, Invalid=9532, Unknown=0, NotChecked=0, Total=14280 [2021-11-09 10:50:59,404 INFO L87 Difference]: Start difference. First operand 227 states and 234 transitions. Second operand has 120 states, 120 states have (on average 1.9583333333333333) internal successors, (235), 120 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:51:04,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:51:04,335 INFO L93 Difference]: Finished difference Result 315 states and 352 transitions. [2021-11-09 10:51:04,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2021-11-09 10:51:04,335 INFO L78 Accepts]: Start accepts. Automaton has has 120 states, 120 states have (on average 1.9583333333333333) internal successors, (235), 120 states have internal predecessors, (235), 0 states have call successors, (0), 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 226 [2021-11-09 10:51:04,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:51:04,337 INFO L225 Difference]: With dead ends: 315 [2021-11-09 10:51:04,337 INFO L226 Difference]: Without dead ends: 272 [2021-11-09 10:51:04,341 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 411 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 210 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7240 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=15236, Invalid=29496, Unknown=0, NotChecked=0, Total=44732 [2021-11-09 10:51:04,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-11-09 10:51:04,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 230. [2021-11-09 10:51:04,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 1.034934497816594) internal successors, (237), 229 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:51:04,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 237 transitions. [2021-11-09 10:51:04,363 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 237 transitions. Word has length 226 [2021-11-09 10:51:04,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:51:04,363 INFO L470 AbstractCegarLoop]: Abstraction has 230 states and 237 transitions. [2021-11-09 10:51:04,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 120 states, 120 states have (on average 1.9583333333333333) internal successors, (235), 120 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:51:04,363 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 237 transitions. [2021-11-09 10:51:04,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2021-11-09 10:51:04,364 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:51:04,365 INFO L513 BasicCegarLoop]: trace histogram [98, 92, 26, 6, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:51:04,405 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Ended with exit code 0 [2021-11-09 10:51:04,565 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,92 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:51:04,565 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:51:04,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:51:04,566 INFO L85 PathProgramCache]: Analyzing trace with hash -476322468, now seen corresponding path program 91 times [2021-11-09 10:51:04,566 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:51:04,566 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87650088] [2021-11-09 10:51:04,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:51:04,566 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:51:04,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:51:08,123 INFO L134 CoverageAnalysis]: Checked inductivity of 9955 backedges. 1023 proven. 8556 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2021-11-09 10:51:08,123 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:51:08,123 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87650088] [2021-11-09 10:51:08,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87650088] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:51:08,123 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360201080] [2021-11-09 10:51:08,123 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 10:51:08,124 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:51:08,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:51:08,124 INFO L229 MonitoredProcess]: Starting monitored process 93 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:51:08,125 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2021-11-09 10:51:12,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:51:12,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 580 conjuncts, 94 conjunts are in the unsatisfiable core [2021-11-09 10:51:12,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:51:13,384 INFO L134 CoverageAnalysis]: Checked inductivity of 9955 backedges. 1023 proven. 8556 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2021-11-09 10:51:13,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360201080] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:51:13,384 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:51:13,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95] total 96 [2021-11-09 10:51:13,385 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015704907] [2021-11-09 10:51:13,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2021-11-09 10:51:13,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:51:13,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2021-11-09 10:51:13,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2021-11-09 10:51:13,387 INFO L87 Difference]: Start difference. First operand 230 states and 237 transitions. Second operand has 96 states, 96 states have (on average 2.0729166666666665) internal successors, (199), 96 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:51:13,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:51:13,664 INFO L93 Difference]: Finished difference Result 276 states and 291 transitions. [2021-11-09 10:51:13,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-11-09 10:51:13,664 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 2.0729166666666665) internal successors, (199), 96 states have internal predecessors, (199), 0 states have call successors, (0), 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 229 [2021-11-09 10:51:13,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:51:13,666 INFO L225 Difference]: With dead ends: 276 [2021-11-09 10:51:13,666 INFO L226 Difference]: Without dead ends: 232 [2021-11-09 10:51:13,667 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 229 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2021-11-09 10:51:13,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-11-09 10:51:13,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 232. [2021-11-09 10:51:13,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 231 states have (on average 1.0346320346320346) internal successors, (239), 231 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:51:13,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 239 transitions. [2021-11-09 10:51:13,695 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 239 transitions. Word has length 229 [2021-11-09 10:51:13,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:51:13,695 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 239 transitions. [2021-11-09 10:51:13,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 2.0729166666666665) internal successors, (199), 96 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:51:13,696 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 239 transitions. [2021-11-09 10:51:13,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2021-11-09 10:51:13,697 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:51:13,697 INFO L513 BasicCegarLoop]: trace histogram [99, 93, 26, 6, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:51:13,734 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Ended with exit code 0 [2021-11-09 10:51:13,897 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2021-11-09 10:51:13,898 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:51:13,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:51:13,898 INFO L85 PathProgramCache]: Analyzing trace with hash -172886567, now seen corresponding path program 92 times [2021-11-09 10:51:13,898 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:51:13,898 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316456031] [2021-11-09 10:51:13,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:51:13,898 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:51:13,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:51:17,543 INFO L134 CoverageAnalysis]: Checked inductivity of 10152 backedges. 1034 proven. 8742 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2021-11-09 10:51:17,543 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:51:17,543 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316456031] [2021-11-09 10:51:17,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316456031] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:51:17,543 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642222219] [2021-11-09 10:51:17,543 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 10:51:17,544 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:51:17,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:51:17,545 INFO L229 MonitoredProcess]: Starting monitored process 94 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:51:17,546 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2021-11-09 10:51:22,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 10:51:22,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:51:22,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 584 conjuncts, 95 conjunts are in the unsatisfiable core [2021-11-09 10:51:22,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:51:23,026 INFO L134 CoverageAnalysis]: Checked inductivity of 10152 backedges. 1034 proven. 8742 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2021-11-09 10:51:23,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642222219] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:51:23,026 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:51:23,026 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96] total 97 [2021-11-09 10:51:23,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124288835] [2021-11-09 10:51:23,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2021-11-09 10:51:23,027 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:51:23,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2021-11-09 10:51:23,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2021-11-09 10:51:23,029 INFO L87 Difference]: Start difference. First operand 232 states and 239 transitions. Second operand has 97 states, 97 states have (on average 2.0721649484536084) internal successors, (201), 97 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:51:23,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:51:23,377 INFO L93 Difference]: Finished difference Result 278 states and 293 transitions. [2021-11-09 10:51:23,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-11-09 10:51:23,378 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 2.0721649484536084) internal successors, (201), 97 states have internal predecessors, (201), 0 states have call successors, (0), 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 231 [2021-11-09 10:51:23,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:51:23,379 INFO L225 Difference]: With dead ends: 278 [2021-11-09 10:51:23,379 INFO L226 Difference]: Without dead ends: 234 [2021-11-09 10:51:23,380 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 231 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2021-11-09 10:51:23,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-11-09 10:51:23,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 234. [2021-11-09 10:51:23,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 1.0343347639484979) internal successors, (241), 233 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:51:23,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 241 transitions. [2021-11-09 10:51:23,402 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 241 transitions. Word has length 231 [2021-11-09 10:51:23,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:51:23,402 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 241 transitions. [2021-11-09 10:51:23,402 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 2.0721649484536084) internal successors, (201), 97 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:51:23,402 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 241 transitions. [2021-11-09 10:51:23,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2021-11-09 10:51:23,403 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:51:23,403 INFO L513 BasicCegarLoop]: trace histogram [100, 94, 26, 6, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:51:23,443 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Ended with exit code 0 [2021-11-09 10:51:23,604 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,94 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:51:23,604 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:51:23,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:51:23,604 INFO L85 PathProgramCache]: Analyzing trace with hash -628761834, now seen corresponding path program 93 times [2021-11-09 10:51:23,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:51:23,605 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656985711] [2021-11-09 10:51:23,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:51:23,608 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:51:23,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:51:27,290 INFO L134 CoverageAnalysis]: Checked inductivity of 10351 backedges. 1045 proven. 8930 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2021-11-09 10:51:27,290 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:51:27,290 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656985711] [2021-11-09 10:51:27,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656985711] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:51:27,290 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910691208] [2021-11-09 10:51:27,291 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 10:51:27,291 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:51:27,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:51:27,297 INFO L229 MonitoredProcess]: Starting monitored process 95 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:51:27,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2021-11-09 10:51:32,120 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-11-09 10:51:32,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:51:32,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-09 10:51:32,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:51:34,930 INFO L134 CoverageAnalysis]: Checked inductivity of 10351 backedges. 1070 proven. 351 refuted. 0 times theorem prover too weak. 8930 trivial. 0 not checked. [2021-11-09 10:51:34,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910691208] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:51:34,930 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:51:34,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 29] total 124 [2021-11-09 10:51:34,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294558652] [2021-11-09 10:51:34,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 124 states [2021-11-09 10:51:34,931 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:51:34,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2021-11-09 10:51:34,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5061, Invalid=10191, Unknown=0, NotChecked=0, Total=15252 [2021-11-09 10:51:34,934 INFO L87 Difference]: Start difference. First operand 234 states and 241 transitions. Second operand has 124 states, 124 states have (on average 1.9516129032258065) internal successors, (242), 124 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:51:40,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:51:40,175 INFO L93 Difference]: Finished difference Result 323 states and 360 transitions. [2021-11-09 10:51:40,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2021-11-09 10:51:40,175 INFO L78 Accepts]: Start accepts. Automaton has has 124 states, 124 states have (on average 1.9516129032258065) internal successors, (242), 124 states have internal predecessors, (242), 0 states have call successors, (0), 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 233 [2021-11-09 10:51:40,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:51:40,177 INFO L225 Difference]: With dead ends: 323 [2021-11-09 10:51:40,177 INFO L226 Difference]: Without dead ends: 279 [2021-11-09 10:51:40,180 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 424 GetRequests, 207 SyntacticMatches, 0 SemanticMatches, 217 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7718 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=16271, Invalid=31471, Unknown=0, NotChecked=0, Total=47742 [2021-11-09 10:51:40,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2021-11-09 10:51:40,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 237. [2021-11-09 10:51:40,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 236 states have (on average 1.0338983050847457) internal successors, (244), 236 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:51:40,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 244 transitions. [2021-11-09 10:51:40,203 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 244 transitions. Word has length 233 [2021-11-09 10:51:40,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:51:40,203 INFO L470 AbstractCegarLoop]: Abstraction has 237 states and 244 transitions. [2021-11-09 10:51:40,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 124 states, 124 states have (on average 1.9516129032258065) internal successors, (242), 124 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:51:40,203 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 244 transitions. [2021-11-09 10:51:40,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2021-11-09 10:51:40,204 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:51:40,204 INFO L513 BasicCegarLoop]: trace histogram [101, 95, 27, 6, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:51:40,246 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Forceful destruction successful, exit code 0 [2021-11-09 10:51:40,405 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,95 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:51:40,405 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:51:40,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:51:40,405 INFO L85 PathProgramCache]: Analyzing trace with hash 1691395769, now seen corresponding path program 94 times [2021-11-09 10:51:40,406 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:51:40,406 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747328304] [2021-11-09 10:51:40,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:51:40,406 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:51:40,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:51:44,276 INFO L134 CoverageAnalysis]: Checked inductivity of 10579 backedges. 1056 proven. 9120 refuted. 0 times theorem prover too weak. 403 trivial. 0 not checked. [2021-11-09 10:51:44,276 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:51:44,277 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747328304] [2021-11-09 10:51:44,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747328304] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:51:44,277 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445460242] [2021-11-09 10:51:44,277 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 10:51:44,277 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:51:44,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:51:44,278 INFO L229 MonitoredProcess]: Starting monitored process 96 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:51:44,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2021-11-09 10:51:49,660 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 10:51:49,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:51:49,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 597 conjuncts, 97 conjunts are in the unsatisfiable core [2021-11-09 10:51:49,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:51:50,352 INFO L134 CoverageAnalysis]: Checked inductivity of 10579 backedges. 1056 proven. 9120 refuted. 0 times theorem prover too weak. 403 trivial. 0 not checked. [2021-11-09 10:51:50,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445460242] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:51:50,352 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:51:50,352 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98] total 99 [2021-11-09 10:51:50,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227046783] [2021-11-09 10:51:50,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2021-11-09 10:51:50,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:51:50,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2021-11-09 10:51:50,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2021-11-09 10:51:50,355 INFO L87 Difference]: Start difference. First operand 237 states and 244 transitions. Second operand has 99 states, 99 states have (on average 2.0707070707070705) internal successors, (205), 99 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:51:50,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:51:50,659 INFO L93 Difference]: Finished difference Result 284 states and 299 transitions. [2021-11-09 10:51:50,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-11-09 10:51:50,659 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 2.0707070707070705) internal successors, (205), 99 states have internal predecessors, (205), 0 states have call successors, (0), 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 236 [2021-11-09 10:51:50,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:51:50,661 INFO L225 Difference]: With dead ends: 284 [2021-11-09 10:51:50,661 INFO L226 Difference]: Without dead ends: 239 [2021-11-09 10:51:50,662 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2021-11-09 10:51:50,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2021-11-09 10:51:50,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 239. [2021-11-09 10:51:50,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 1.0336134453781514) internal successors, (246), 238 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:51:50,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 246 transitions. [2021-11-09 10:51:50,687 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 246 transitions. Word has length 236 [2021-11-09 10:51:50,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:51:50,687 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 246 transitions. [2021-11-09 10:51:50,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 2.0707070707070705) internal successors, (205), 99 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:51:50,687 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 246 transitions. [2021-11-09 10:51:50,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2021-11-09 10:51:50,688 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:51:50,689 INFO L513 BasicCegarLoop]: trace histogram [102, 96, 27, 6, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:51:50,730 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Ended with exit code 0 [2021-11-09 10:51:50,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,96 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:51:50,889 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:51:50,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:51:50,890 INFO L85 PathProgramCache]: Analyzing trace with hash -1178894436, now seen corresponding path program 95 times [2021-11-09 10:51:50,890 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:51:50,890 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141348871] [2021-11-09 10:51:50,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:51:50,890 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:51:50,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:51:55,008 INFO L134 CoverageAnalysis]: Checked inductivity of 10782 backedges. 1067 proven. 9312 refuted. 0 times theorem prover too weak. 403 trivial. 0 not checked. [2021-11-09 10:51:55,008 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:51:55,009 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141348871] [2021-11-09 10:51:55,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141348871] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:51:55,009 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361755717] [2021-11-09 10:51:55,009 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 10:51:55,009 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:51:55,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:51:55,010 INFO L229 MonitoredProcess]: Starting monitored process 97 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:51:55,012 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2021-11-09 10:52:00,613 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 103 check-sat command(s) [2021-11-09 10:52:00,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:52:00,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 601 conjuncts, 98 conjunts are in the unsatisfiable core [2021-11-09 10:52:00,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:52:01,293 INFO L134 CoverageAnalysis]: Checked inductivity of 10782 backedges. 1067 proven. 9312 refuted. 0 times theorem prover too weak. 403 trivial. 0 not checked. [2021-11-09 10:52:01,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361755717] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:52:01,293 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:52:01,293 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99] total 100 [2021-11-09 10:52:01,293 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880223317] [2021-11-09 10:52:01,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2021-11-09 10:52:01,294 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:52:01,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2021-11-09 10:52:01,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2021-11-09 10:52:01,297 INFO L87 Difference]: Start difference. First operand 239 states and 246 transitions. Second operand has 100 states, 100 states have (on average 2.07) internal successors, (207), 100 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:52:01,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:52:01,612 INFO L93 Difference]: Finished difference Result 286 states and 301 transitions. [2021-11-09 10:52:01,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-11-09 10:52:01,613 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 2.07) internal successors, (207), 100 states have internal predecessors, (207), 0 states have call successors, (0), 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 238 [2021-11-09 10:52:01,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:52:01,614 INFO L225 Difference]: With dead ends: 286 [2021-11-09 10:52:01,614 INFO L226 Difference]: Without dead ends: 241 [2021-11-09 10:52:01,615 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 238 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2021-11-09 10:52:01,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-11-09 10:52:01,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 241. [2021-11-09 10:52:01,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 1.0333333333333334) internal successors, (248), 240 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:52:01,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 248 transitions. [2021-11-09 10:52:01,643 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 248 transitions. Word has length 238 [2021-11-09 10:52:01,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:52:01,643 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 248 transitions. [2021-11-09 10:52:01,643 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 2.07) internal successors, (207), 100 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:52:01,643 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 248 transitions. [2021-11-09 10:52:01,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2021-11-09 10:52:01,645 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:52:01,645 INFO L513 BasicCegarLoop]: trace histogram [103, 97, 27, 6, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:52:01,682 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Ended with exit code 0 [2021-11-09 10:52:01,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,97 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:52:01,848 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:52:01,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:52:01,848 INFO L85 PathProgramCache]: Analyzing trace with hash 2136189887, now seen corresponding path program 96 times [2021-11-09 10:52:01,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:52:01,848 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529503289] [2021-11-09 10:52:01,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:52:01,849 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:52:01,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:52:05,895 INFO L134 CoverageAnalysis]: Checked inductivity of 10987 backedges. 1078 proven. 9506 refuted. 0 times theorem prover too weak. 403 trivial. 0 not checked. [2021-11-09 10:52:05,896 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:52:05,896 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529503289] [2021-11-09 10:52:05,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529503289] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:52:05,896 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163821432] [2021-11-09 10:52:05,896 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 10:52:05,896 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:52:05,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:52:05,904 INFO L229 MonitoredProcess]: Starting monitored process 98 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:52:05,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2021-11-09 10:52:11,459 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2021-11-09 10:52:11,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:52:11,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-09 10:52:11,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:52:12,554 INFO L134 CoverageAnalysis]: Checked inductivity of 10987 backedges. 1261 proven. 36 refuted. 0 times theorem prover too weak. 9690 trivial. 0 not checked. [2021-11-09 10:52:12,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [163821432] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:52:12,555 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:52:12,555 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 9] total 107 [2021-11-09 10:52:12,555 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901671637] [2021-11-09 10:52:12,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2021-11-09 10:52:12,556 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:52:12,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2021-11-09 10:52:12,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2021-11-09 10:52:12,559 INFO L87 Difference]: Start difference. First operand 241 states and 248 transitions. Second operand has 107 states, 107 states have (on average 2.0841121495327104) internal successors, (223), 107 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:52:12,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:52:12,970 INFO L93 Difference]: Finished difference Result 291 states and 309 transitions. [2021-11-09 10:52:12,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2021-11-09 10:52:12,970 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 2.0841121495327104) internal successors, (223), 107 states have internal predecessors, (223), 0 states have call successors, (0), 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 240 [2021-11-09 10:52:12,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:52:12,972 INFO L225 Difference]: With dead ends: 291 [2021-11-09 10:52:12,972 INFO L226 Difference]: Without dead ends: 246 [2021-11-09 10:52:12,974 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 234 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2021-11-09 10:52:12,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-11-09 10:52:13,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 245. [2021-11-09 10:52:13,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 1.0368852459016393) internal successors, (253), 244 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:52:13,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 253 transitions. [2021-11-09 10:52:13,002 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 253 transitions. Word has length 240 [2021-11-09 10:52:13,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:52:13,002 INFO L470 AbstractCegarLoop]: Abstraction has 245 states and 253 transitions. [2021-11-09 10:52:13,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 2.0841121495327104) internal successors, (223), 107 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:52:13,002 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 253 transitions. [2021-11-09 10:52:13,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2021-11-09 10:52:13,004 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:52:13,004 INFO L513 BasicCegarLoop]: trace histogram [105, 98, 27, 7, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:52:13,066 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Ended with exit code 0 [2021-11-09 10:52:13,222 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,98 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:52:13,223 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:52:13,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:52:13,223 INFO L85 PathProgramCache]: Analyzing trace with hash 476201671, now seen corresponding path program 97 times [2021-11-09 10:52:13,223 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:52:13,223 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462289819] [2021-11-09 10:52:13,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:52:13,223 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:52:13,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:52:17,387 INFO L134 CoverageAnalysis]: Checked inductivity of 11403 backedges. 1287 proven. 9702 refuted. 0 times theorem prover too weak. 414 trivial. 0 not checked. [2021-11-09 10:52:17,387 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:52:17,387 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462289819] [2021-11-09 10:52:17,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462289819] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:52:17,387 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932397700] [2021-11-09 10:52:17,388 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 10:52:17,388 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:52:17,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:52:17,389 INFO L229 MonitoredProcess]: Starting monitored process 99 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:52:17,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2021-11-09 10:52:23,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:52:23,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 615 conjuncts, 100 conjunts are in the unsatisfiable core [2021-11-09 10:52:23,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:52:23,837 INFO L134 CoverageAnalysis]: Checked inductivity of 11403 backedges. 1287 proven. 9702 refuted. 0 times theorem prover too weak. 414 trivial. 0 not checked. [2021-11-09 10:52:23,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932397700] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:52:23,837 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:52:23,837 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101] total 102 [2021-11-09 10:52:23,837 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436639009] [2021-11-09 10:52:23,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2021-11-09 10:52:23,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:52:23,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2021-11-09 10:52:23,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2021-11-09 10:52:23,840 INFO L87 Difference]: Start difference. First operand 245 states and 253 transitions. Second operand has 102 states, 102 states have (on average 2.0686274509803924) internal successors, (211), 102 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:52:24,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:52:24,148 INFO L93 Difference]: Finished difference Result 294 states and 311 transitions. [2021-11-09 10:52:24,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2021-11-09 10:52:24,148 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 2.0686274509803924) internal successors, (211), 102 states have internal predecessors, (211), 0 states have call successors, (0), 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 244 [2021-11-09 10:52:24,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:52:24,149 INFO L225 Difference]: With dead ends: 294 [2021-11-09 10:52:24,149 INFO L226 Difference]: Without dead ends: 247 [2021-11-09 10:52:24,150 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2021-11-09 10:52:24,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-11-09 10:52:24,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 247. [2021-11-09 10:52:24,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 1.0365853658536586) internal successors, (255), 246 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:52:24,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 255 transitions. [2021-11-09 10:52:24,175 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 255 transitions. Word has length 244 [2021-11-09 10:52:24,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:52:24,175 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 255 transitions. [2021-11-09 10:52:24,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 2.0686274509803924) internal successors, (211), 102 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:52:24,175 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 255 transitions. [2021-11-09 10:52:24,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2021-11-09 10:52:24,176 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:52:24,176 INFO L513 BasicCegarLoop]: trace histogram [106, 99, 27, 7, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:52:24,217 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Ended with exit code 0 [2021-11-09 10:52:24,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-11-09 10:52:24,377 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:52:24,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:52:24,377 INFO L85 PathProgramCache]: Analyzing trace with hash 497256618, now seen corresponding path program 98 times [2021-11-09 10:52:24,377 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:52:24,377 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35384020] [2021-11-09 10:52:24,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:52:24,378 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:52:24,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:52:28,632 INFO L134 CoverageAnalysis]: Checked inductivity of 11614 backedges. 1300 proven. 9900 refuted. 0 times theorem prover too weak. 414 trivial. 0 not checked. [2021-11-09 10:52:28,632 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:52:28,632 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35384020] [2021-11-09 10:52:28,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35384020] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:52:28,632 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209552383] [2021-11-09 10:52:28,632 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 10:52:28,633 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:52:28,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:52:28,633 INFO L229 MonitoredProcess]: Starting monitored process 100 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:52:28,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2021-11-09 10:52:34,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 10:52:34,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:52:34,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 619 conjuncts, 101 conjunts are in the unsatisfiable core [2021-11-09 10:52:34,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:52:35,139 INFO L134 CoverageAnalysis]: Checked inductivity of 11614 backedges. 1300 proven. 9900 refuted. 0 times theorem prover too weak. 414 trivial. 0 not checked. [2021-11-09 10:52:35,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209552383] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:52:35,139 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:52:35,140 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 102] total 103 [2021-11-09 10:52:35,140 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494859918] [2021-11-09 10:52:35,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2021-11-09 10:52:35,140 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:52:35,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2021-11-09 10:52:35,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2021-11-09 10:52:35,143 INFO L87 Difference]: Start difference. First operand 247 states and 255 transitions. Second operand has 103 states, 103 states have (on average 2.0679611650485437) internal successors, (213), 103 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:52:35,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:52:35,467 INFO L93 Difference]: Finished difference Result 296 states and 313 transitions. [2021-11-09 10:52:35,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-11-09 10:52:35,467 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 2.0679611650485437) internal successors, (213), 103 states have internal predecessors, (213), 0 states have call successors, (0), 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 246 [2021-11-09 10:52:35,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:52:35,468 INFO L225 Difference]: With dead ends: 296 [2021-11-09 10:52:35,468 INFO L226 Difference]: Without dead ends: 249 [2021-11-09 10:52:35,469 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 246 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2021-11-09 10:52:35,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-11-09 10:52:35,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 249. [2021-11-09 10:52:35,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 248 states have (on average 1.0362903225806452) internal successors, (257), 248 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:52:35,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 257 transitions. [2021-11-09 10:52:35,510 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 257 transitions. Word has length 246 [2021-11-09 10:52:35,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:52:35,511 INFO L470 AbstractCegarLoop]: Abstraction has 249 states and 257 transitions. [2021-11-09 10:52:35,511 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 2.0679611650485437) internal successors, (213), 103 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:52:35,511 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 257 transitions. [2021-11-09 10:52:35,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2021-11-09 10:52:35,513 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:52:35,513 INFO L513 BasicCegarLoop]: trace histogram [107, 100, 27, 7, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:52:35,581 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Forceful destruction successful, exit code 0 [2021-11-09 10:52:35,737 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-11-09 10:52:35,737 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:52:35,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:52:35,738 INFO L85 PathProgramCache]: Analyzing trace with hash -743775795, now seen corresponding path program 99 times [2021-11-09 10:52:35,738 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:52:35,738 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944658576] [2021-11-09 10:52:35,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:52:35,738 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:52:35,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:52:40,065 INFO L134 CoverageAnalysis]: Checked inductivity of 11827 backedges. 1313 proven. 10100 refuted. 0 times theorem prover too weak. 414 trivial. 0 not checked. [2021-11-09 10:52:40,065 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:52:40,065 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944658576] [2021-11-09 10:52:40,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944658576] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:52:40,065 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010953018] [2021-11-09 10:52:40,065 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 10:52:40,066 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:52:40,066 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:52:40,066 INFO L229 MonitoredProcess]: Starting monitored process 101 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:52:40,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2021-11-09 10:52:45,973 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-11-09 10:52:45,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:52:45,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-09 10:52:45,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:52:49,011 INFO L134 CoverageAnalysis]: Checked inductivity of 11827 backedges. 1349 proven. 378 refuted. 0 times theorem prover too weak. 10100 trivial. 0 not checked. [2021-11-09 10:52:49,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010953018] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:52:49,012 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:52:49,012 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 30] total 131 [2021-11-09 10:52:49,016 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477293525] [2021-11-09 10:52:49,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 131 states [2021-11-09 10:52:49,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:52:49,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2021-11-09 10:52:49,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5687, Invalid=11343, Unknown=0, NotChecked=0, Total=17030 [2021-11-09 10:52:49,019 INFO L87 Difference]: Start difference. First operand 249 states and 257 transitions. Second operand has 131 states, 131 states have (on average 1.9618320610687023) internal successors, (257), 131 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:52:55,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:52:55,096 INFO L93 Difference]: Finished difference Result 355 states and 401 transitions. [2021-11-09 10:52:55,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2021-11-09 10:52:55,096 INFO L78 Accepts]: Start accepts. Automaton has has 131 states, 131 states have (on average 1.9618320610687023) internal successors, (257), 131 states have internal predecessors, (257), 0 states have call successors, (0), 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 248 [2021-11-09 10:52:55,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:52:55,097 INFO L225 Difference]: With dead ends: 355 [2021-11-09 10:52:55,097 INFO L226 Difference]: Without dead ends: 308 [2021-11-09 10:52:55,102 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 451 GetRequests, 221 SyntacticMatches, 0 SemanticMatches, 230 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8736 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=18211, Invalid=35381, Unknown=0, NotChecked=0, Total=53592 [2021-11-09 10:52:55,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2021-11-09 10:52:55,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 252. [2021-11-09 10:52:55,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 1.0358565737051793) internal successors, (260), 251 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:52:55,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 260 transitions. [2021-11-09 10:52:55,129 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 260 transitions. Word has length 248 [2021-11-09 10:52:55,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:52:55,129 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 260 transitions. [2021-11-09 10:52:55,130 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 131 states, 131 states have (on average 1.9618320610687023) internal successors, (257), 131 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:52:55,130 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 260 transitions. [2021-11-09 10:52:55,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2021-11-09 10:52:55,131 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:52:55,131 INFO L513 BasicCegarLoop]: trace histogram [108, 101, 28, 7, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:52:55,174 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Forceful destruction successful, exit code 0 [2021-11-09 10:52:55,336 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-11-09 10:52:55,336 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:52:55,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:52:55,336 INFO L85 PathProgramCache]: Analyzing trace with hash -2098679492, now seen corresponding path program 100 times [2021-11-09 10:52:55,336 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:52:55,337 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733617819] [2021-11-09 10:52:55,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:52:55,337 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:52:55,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:52:59,776 INFO L134 CoverageAnalysis]: Checked inductivity of 12070 backedges. 1326 proven. 10302 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2021-11-09 10:52:59,776 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:52:59,776 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733617819] [2021-11-09 10:52:59,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733617819] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:52:59,777 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884555876] [2021-11-09 10:52:59,777 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 10:52:59,777 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:52:59,777 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:52:59,778 INFO L229 MonitoredProcess]: Starting monitored process 102 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:52:59,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2021-11-09 10:53:05,939 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 10:53:05,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:53:05,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 632 conjuncts, 103 conjunts are in the unsatisfiable core [2021-11-09 10:53:05,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:53:06,666 INFO L134 CoverageAnalysis]: Checked inductivity of 12070 backedges. 1326 proven. 10302 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2021-11-09 10:53:06,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884555876] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:53:06,666 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:53:06,666 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [104, 104] total 105 [2021-11-09 10:53:06,666 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801221397] [2021-11-09 10:53:06,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2021-11-09 10:53:06,667 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:53:06,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2021-11-09 10:53:06,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2021-11-09 10:53:06,668 INFO L87 Difference]: Start difference. First operand 252 states and 260 transitions. Second operand has 105 states, 105 states have (on average 2.066666666666667) internal successors, (217), 105 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:53:06,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:53:06,975 INFO L93 Difference]: Finished difference Result 302 states and 319 transitions. [2021-11-09 10:53:06,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2021-11-09 10:53:06,976 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 2.066666666666667) internal successors, (217), 105 states have internal predecessors, (217), 0 states have call successors, (0), 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 251 [2021-11-09 10:53:06,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:53:06,976 INFO L225 Difference]: With dead ends: 302 [2021-11-09 10:53:06,977 INFO L226 Difference]: Without dead ends: 254 [2021-11-09 10:53:06,977 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2021-11-09 10:53:06,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-11-09 10:53:07,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 254. [2021-11-09 10:53:07,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 253 states have (on average 1.0355731225296443) internal successors, (262), 253 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:53:07,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 262 transitions. [2021-11-09 10:53:07,003 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 262 transitions. Word has length 251 [2021-11-09 10:53:07,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:53:07,003 INFO L470 AbstractCegarLoop]: Abstraction has 254 states and 262 transitions. [2021-11-09 10:53:07,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 2.066666666666667) internal successors, (217), 105 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:53:07,003 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 262 transitions. [2021-11-09 10:53:07,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2021-11-09 10:53:07,004 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:53:07,005 INFO L513 BasicCegarLoop]: trace histogram [109, 102, 28, 7, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:53:07,048 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Forceful destruction successful, exit code 0 [2021-11-09 10:53:07,205 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-11-09 10:53:07,205 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:53:07,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:53:07,205 INFO L85 PathProgramCache]: Analyzing trace with hash -1807051271, now seen corresponding path program 101 times [2021-11-09 10:53:07,206 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:53:07,206 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167215306] [2021-11-09 10:53:07,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:53:07,206 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:53:07,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:53:11,688 INFO L134 CoverageAnalysis]: Checked inductivity of 12287 backedges. 1339 proven. 10506 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2021-11-09 10:53:11,688 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:53:11,688 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167215306] [2021-11-09 10:53:11,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167215306] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:53:11,688 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931115970] [2021-11-09 10:53:11,688 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 10:53:11,688 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:53:11,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:53:11,689 INFO L229 MonitoredProcess]: Starting monitored process 103 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:53:11,690 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2021-11-09 10:53:17,946 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 110 check-sat command(s) [2021-11-09 10:53:17,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:53:17,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 636 conjuncts, 104 conjunts are in the unsatisfiable core [2021-11-09 10:53:17,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:53:18,720 INFO L134 CoverageAnalysis]: Checked inductivity of 12287 backedges. 1339 proven. 10506 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2021-11-09 10:53:18,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931115970] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:53:18,720 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:53:18,720 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 105] total 106 [2021-11-09 10:53:18,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955921893] [2021-11-09 10:53:18,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2021-11-09 10:53:18,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:53:18,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2021-11-09 10:53:18,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5565, Invalid=5565, Unknown=0, NotChecked=0, Total=11130 [2021-11-09 10:53:18,723 INFO L87 Difference]: Start difference. First operand 254 states and 262 transitions. Second operand has 106 states, 106 states have (on average 2.0660377358490565) internal successors, (219), 106 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:53:19,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:53:19,077 INFO L93 Difference]: Finished difference Result 304 states and 321 transitions. [2021-11-09 10:53:19,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2021-11-09 10:53:19,078 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 106 states have (on average 2.0660377358490565) internal successors, (219), 106 states have internal predecessors, (219), 0 states have call successors, (0), 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 253 [2021-11-09 10:53:19,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:53:19,078 INFO L225 Difference]: With dead ends: 304 [2021-11-09 10:53:19,079 INFO L226 Difference]: Without dead ends: 256 [2021-11-09 10:53:19,080 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 253 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=5565, Invalid=5565, Unknown=0, NotChecked=0, Total=11130 [2021-11-09 10:53:19,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-11-09 10:53:19,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 256. [2021-11-09 10:53:19,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 1.035294117647059) internal successors, (264), 255 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:53:19,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 264 transitions. [2021-11-09 10:53:19,106 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 264 transitions. Word has length 253 [2021-11-09 10:53:19,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:53:19,107 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 264 transitions. [2021-11-09 10:53:19,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 106 states, 106 states have (on average 2.0660377358490565) internal successors, (219), 106 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:53:19,107 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 264 transitions. [2021-11-09 10:53:19,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2021-11-09 10:53:19,108 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:53:19,108 INFO L513 BasicCegarLoop]: trace histogram [110, 103, 28, 7, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:53:19,154 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Ended with exit code 0 [2021-11-09 10:53:19,308 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,103 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:53:19,309 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:53:19,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:53:19,309 INFO L85 PathProgramCache]: Analyzing trace with hash -725205130, now seen corresponding path program 102 times [2021-11-09 10:53:19,309 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:53:19,309 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855819708] [2021-11-09 10:53:19,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:53:19,309 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:53:19,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:53:23,935 INFO L134 CoverageAnalysis]: Checked inductivity of 12506 backedges. 1352 proven. 10712 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2021-11-09 10:53:23,935 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:53:23,936 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855819708] [2021-11-09 10:53:23,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855819708] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:53:23,936 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803050576] [2021-11-09 10:53:23,936 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 10:53:23,936 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:53:23,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:53:23,937 INFO L229 MonitoredProcess]: Starting monitored process 104 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:53:23,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2021-11-09 10:53:30,264 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 29 check-sat command(s) [2021-11-09 10:53:30,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:53:30,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-09 10:53:30,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:53:33,476 INFO L134 CoverageAnalysis]: Checked inductivity of 12506 backedges. 1388 proven. 406 refuted. 0 times theorem prover too weak. 10712 trivial. 0 not checked. [2021-11-09 10:53:33,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803050576] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:53:33,476 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:53:33,477 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [106, 31] total 135 [2021-11-09 10:53:33,477 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060324081] [2021-11-09 10:53:33,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 135 states [2021-11-09 10:53:33,477 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:53:33,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 135 interpolants. [2021-11-09 10:53:33,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6029, Invalid=12061, Unknown=0, NotChecked=0, Total=18090 [2021-11-09 10:53:33,481 INFO L87 Difference]: Start difference. First operand 256 states and 264 transitions. Second operand has 135 states, 135 states have (on average 1.9555555555555555) internal successors, (264), 135 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:53:39,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:53:39,863 INFO L93 Difference]: Finished difference Result 363 states and 409 transitions. [2021-11-09 10:53:39,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2021-11-09 10:53:39,863 INFO L78 Accepts]: Start accepts. Automaton has has 135 states, 135 states have (on average 1.9555555555555555) internal successors, (264), 135 states have internal predecessors, (264), 0 states have call successors, (0), 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 255 [2021-11-09 10:53:39,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:53:39,864 INFO L225 Difference]: With dead ends: 363 [2021-11-09 10:53:39,864 INFO L226 Difference]: Without dead ends: 315 [2021-11-09 10:53:39,869 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 464 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 237 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9261 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=19341, Invalid=37541, Unknown=0, NotChecked=0, Total=56882 [2021-11-09 10:53:39,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-11-09 10:53:39,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 259. [2021-11-09 10:53:39,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 258 states have (on average 1.0348837209302326) internal successors, (267), 258 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:53:39,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 267 transitions. [2021-11-09 10:53:39,897 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 267 transitions. Word has length 255 [2021-11-09 10:53:39,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:53:39,897 INFO L470 AbstractCegarLoop]: Abstraction has 259 states and 267 transitions. [2021-11-09 10:53:39,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 135 states, 135 states have (on average 1.9555555555555555) internal successors, (264), 135 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:53:39,897 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 267 transitions. [2021-11-09 10:53:39,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2021-11-09 10:53:39,898 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:53:39,898 INFO L513 BasicCegarLoop]: trace histogram [111, 104, 29, 7, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:53:39,942 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Ended with exit code 0 [2021-11-09 10:53:40,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,104 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:53:40,099 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:53:40,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:53:40,099 INFO L85 PathProgramCache]: Analyzing trace with hash -1161059815, now seen corresponding path program 103 times [2021-11-09 10:53:40,099 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:53:40,099 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215118482] [2021-11-09 10:53:40,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:53:40,100 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:53:40,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:53:44,728 INFO L134 CoverageAnalysis]: Checked inductivity of 12756 backedges. 1365 proven. 10920 refuted. 0 times theorem prover too weak. 471 trivial. 0 not checked. [2021-11-09 10:53:44,729 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:53:44,729 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215118482] [2021-11-09 10:53:44,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215118482] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:53:44,729 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164915437] [2021-11-09 10:53:44,729 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 10:53:44,729 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:53:44,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:53:44,730 INFO L229 MonitoredProcess]: Starting monitored process 105 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:53:44,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2021-11-09 10:53:51,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:53:51,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 649 conjuncts, 106 conjunts are in the unsatisfiable core [2021-11-09 10:53:51,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:53:51,927 INFO L134 CoverageAnalysis]: Checked inductivity of 12756 backedges. 1365 proven. 10920 refuted. 0 times theorem prover too weak. 471 trivial. 0 not checked. [2021-11-09 10:53:51,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164915437] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:53:51,928 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:53:51,928 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [107, 107] total 108 [2021-11-09 10:53:51,928 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159209107] [2021-11-09 10:53:51,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2021-11-09 10:53:51,928 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:53:51,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2021-11-09 10:53:51,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5778, Invalid=5778, Unknown=0, NotChecked=0, Total=11556 [2021-11-09 10:53:51,930 INFO L87 Difference]: Start difference. First operand 259 states and 267 transitions. Second operand has 108 states, 108 states have (on average 2.064814814814815) internal successors, (223), 108 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:53:52,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:53:52,269 INFO L93 Difference]: Finished difference Result 310 states and 327 transitions. [2021-11-09 10:53:52,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2021-11-09 10:53:52,269 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 108 states have (on average 2.064814814814815) internal successors, (223), 108 states have internal predecessors, (223), 0 states have call successors, (0), 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 258 [2021-11-09 10:53:52,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:53:52,270 INFO L225 Difference]: With dead ends: 310 [2021-11-09 10:53:52,270 INFO L226 Difference]: Without dead ends: 261 [2021-11-09 10:53:52,271 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=5778, Invalid=5778, Unknown=0, NotChecked=0, Total=11556 [2021-11-09 10:53:52,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-11-09 10:53:52,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 261. [2021-11-09 10:53:52,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 260 states have (on average 1.0346153846153847) internal successors, (269), 260 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:53:52,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 269 transitions. [2021-11-09 10:53:52,298 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 269 transitions. Word has length 258 [2021-11-09 10:53:52,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:53:52,299 INFO L470 AbstractCegarLoop]: Abstraction has 261 states and 269 transitions. [2021-11-09 10:53:52,299 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 108 states, 108 states have (on average 2.064814814814815) internal successors, (223), 108 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:53:52,299 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 269 transitions. [2021-11-09 10:53:52,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2021-11-09 10:53:52,300 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:53:52,300 INFO L513 BasicCegarLoop]: trace histogram [112, 105, 29, 7, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:53:52,345 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Ended with exit code 0 [2021-11-09 10:53:52,500 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-11-09 10:53:52,501 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:53:52,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:53:52,501 INFO L85 PathProgramCache]: Analyzing trace with hash -947953988, now seen corresponding path program 104 times [2021-11-09 10:53:52,501 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:53:52,501 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775281491] [2021-11-09 10:53:52,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:53:52,502 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:53:52,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:53:57,219 INFO L134 CoverageAnalysis]: Checked inductivity of 12979 backedges. 1378 proven. 11130 refuted. 0 times theorem prover too weak. 471 trivial. 0 not checked. [2021-11-09 10:53:57,219 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:53:57,219 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775281491] [2021-11-09 10:53:57,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775281491] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:53:57,220 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842054049] [2021-11-09 10:53:57,220 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 10:53:57,220 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:53:57,220 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:53:57,221 INFO L229 MonitoredProcess]: Starting monitored process 106 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:53:57,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2021-11-09 10:54:03,670 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 10:54:03,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:54:03,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 653 conjuncts, 107 conjunts are in the unsatisfiable core [2021-11-09 10:54:03,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:54:04,430 INFO L134 CoverageAnalysis]: Checked inductivity of 12979 backedges. 1378 proven. 11130 refuted. 0 times theorem prover too weak. 471 trivial. 0 not checked. [2021-11-09 10:54:04,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842054049] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:54:04,430 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:54:04,430 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [108, 108] total 109 [2021-11-09 10:54:04,431 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633836611] [2021-11-09 10:54:04,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 109 states [2021-11-09 10:54:04,431 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:54:04,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2021-11-09 10:54:04,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5886, Invalid=5886, Unknown=0, NotChecked=0, Total=11772 [2021-11-09 10:54:04,434 INFO L87 Difference]: Start difference. First operand 261 states and 269 transitions. Second operand has 109 states, 109 states have (on average 2.0642201834862384) internal successors, (225), 109 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:54:04,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:54:04,782 INFO L93 Difference]: Finished difference Result 312 states and 329 transitions. [2021-11-09 10:54:04,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2021-11-09 10:54:04,783 INFO L78 Accepts]: Start accepts. Automaton has has 109 states, 109 states have (on average 2.0642201834862384) internal successors, (225), 109 states have internal predecessors, (225), 0 states have call successors, (0), 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 260 [2021-11-09 10:54:04,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:54:04,783 INFO L225 Difference]: With dead ends: 312 [2021-11-09 10:54:04,783 INFO L226 Difference]: Without dead ends: 263 [2021-11-09 10:54:04,785 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 260 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=5886, Invalid=5886, Unknown=0, NotChecked=0, Total=11772 [2021-11-09 10:54:04,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2021-11-09 10:54:04,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 263. [2021-11-09 10:54:04,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 1.034351145038168) internal successors, (271), 262 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:54:04,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 271 transitions. [2021-11-09 10:54:04,813 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 271 transitions. Word has length 260 [2021-11-09 10:54:04,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:54:04,814 INFO L470 AbstractCegarLoop]: Abstraction has 263 states and 271 transitions. [2021-11-09 10:54:04,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 109 states, 109 states have (on average 2.0642201834862384) internal successors, (225), 109 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:54:04,814 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 271 transitions. [2021-11-09 10:54:04,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2021-11-09 10:54:04,815 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:54:04,815 INFO L513 BasicCegarLoop]: trace histogram [113, 106, 29, 7, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:54:04,861 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Forceful destruction successful, exit code 0 [2021-11-09 10:54:05,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,106 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:54:05,016 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:54:05,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:54:05,016 INFO L85 PathProgramCache]: Analyzing trace with hash 1983282847, now seen corresponding path program 105 times [2021-11-09 10:54:05,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:54:05,016 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406020242] [2021-11-09 10:54:05,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:54:05,017 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:54:05,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:54:09,935 INFO L134 CoverageAnalysis]: Checked inductivity of 13204 backedges. 1391 proven. 11342 refuted. 0 times theorem prover too weak. 471 trivial. 0 not checked. [2021-11-09 10:54:09,935 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:54:09,936 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406020242] [2021-11-09 10:54:09,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406020242] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:54:09,936 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690977771] [2021-11-09 10:54:09,936 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 10:54:09,936 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:54:09,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:54:09,937 INFO L229 MonitoredProcess]: Starting monitored process 107 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:54:09,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2021-11-09 10:54:16,494 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-11-09 10:54:16,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:54:16,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-09 10:54:16,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:54:19,865 INFO L134 CoverageAnalysis]: Checked inductivity of 13204 backedges. 1427 proven. 435 refuted. 0 times theorem prover too weak. 11342 trivial. 0 not checked. [2021-11-09 10:54:19,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1690977771] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:54:19,866 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:54:19,866 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [109, 32] total 139 [2021-11-09 10:54:19,866 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214226148] [2021-11-09 10:54:19,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 139 states [2021-11-09 10:54:19,867 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:54:19,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 139 interpolants. [2021-11-09 10:54:19,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6381, Invalid=12801, Unknown=0, NotChecked=0, Total=19182 [2021-11-09 10:54:19,869 INFO L87 Difference]: Start difference. First operand 263 states and 271 transitions. Second operand has 139 states, 139 states have (on average 1.9496402877697843) internal successors, (271), 139 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:54:26,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:54:26,555 INFO L93 Difference]: Finished difference Result 371 states and 417 transitions. [2021-11-09 10:54:26,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2021-11-09 10:54:26,555 INFO L78 Accepts]: Start accepts. Automaton has has 139 states, 139 states have (on average 1.9496402877697843) internal successors, (271), 139 states have internal predecessors, (271), 0 states have call successors, (0), 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 262 [2021-11-09 10:54:26,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:54:26,556 INFO L225 Difference]: With dead ends: 371 [2021-11-09 10:54:26,557 INFO L226 Difference]: Without dead ends: 322 [2021-11-09 10:54:26,563 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 477 GetRequests, 233 SyntacticMatches, 0 SemanticMatches, 244 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9801 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=20505, Invalid=39765, Unknown=0, NotChecked=0, Total=60270 [2021-11-09 10:54:26,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2021-11-09 10:54:26,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 266. [2021-11-09 10:54:26,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 265 states have (on average 1.0339622641509434) internal successors, (274), 265 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:54:26,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 274 transitions. [2021-11-09 10:54:26,592 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 274 transitions. Word has length 262 [2021-11-09 10:54:26,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:54:26,592 INFO L470 AbstractCegarLoop]: Abstraction has 266 states and 274 transitions. [2021-11-09 10:54:26,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 139 states, 139 states have (on average 1.9496402877697843) internal successors, (271), 139 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:54:26,593 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 274 transitions. [2021-11-09 10:54:26,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2021-11-09 10:54:26,594 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:54:26,594 INFO L513 BasicCegarLoop]: trace histogram [114, 107, 30, 7, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:54:26,639 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Ended with exit code 0 [2021-11-09 10:54:26,794 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,107 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:54:26,794 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:54:26,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:54:26,795 INFO L85 PathProgramCache]: Analyzing trace with hash 555380714, now seen corresponding path program 106 times [2021-11-09 10:54:26,795 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:54:26,795 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277089290] [2021-11-09 10:54:26,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:54:26,795 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:54:26,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:54:31,792 INFO L134 CoverageAnalysis]: Checked inductivity of 13461 backedges. 1404 proven. 11556 refuted. 0 times theorem prover too weak. 501 trivial. 0 not checked. [2021-11-09 10:54:31,792 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:54:31,792 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277089290] [2021-11-09 10:54:31,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277089290] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:54:31,792 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053029637] [2021-11-09 10:54:31,792 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 10:54:31,792 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:54:31,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:54:31,793 INFO L229 MonitoredProcess]: Starting monitored process 108 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:54:31,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2021-11-09 10:54:38,598 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 10:54:38,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:54:38,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 666 conjuncts, 109 conjunts are in the unsatisfiable core [2021-11-09 10:54:38,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:54:39,369 INFO L134 CoverageAnalysis]: Checked inductivity of 13461 backedges. 1404 proven. 11556 refuted. 0 times theorem prover too weak. 501 trivial. 0 not checked. [2021-11-09 10:54:39,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053029637] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:54:39,369 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:54:39,369 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [110, 110] total 111 [2021-11-09 10:54:39,369 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819789025] [2021-11-09 10:54:39,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2021-11-09 10:54:39,370 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:54:39,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2021-11-09 10:54:39,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6105, Invalid=6105, Unknown=0, NotChecked=0, Total=12210 [2021-11-09 10:54:39,372 INFO L87 Difference]: Start difference. First operand 266 states and 274 transitions. Second operand has 111 states, 111 states have (on average 2.063063063063063) internal successors, (229), 111 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:54:39,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:54:39,740 INFO L93 Difference]: Finished difference Result 318 states and 335 transitions. [2021-11-09 10:54:39,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2021-11-09 10:54:39,741 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 111 states have (on average 2.063063063063063) internal successors, (229), 111 states have internal predecessors, (229), 0 states have call successors, (0), 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 265 [2021-11-09 10:54:39,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:54:39,742 INFO L225 Difference]: With dead ends: 318 [2021-11-09 10:54:39,742 INFO L226 Difference]: Without dead ends: 268 [2021-11-09 10:54:39,744 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 374 GetRequests, 265 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=6105, Invalid=6105, Unknown=0, NotChecked=0, Total=12210 [2021-11-09 10:54:39,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2021-11-09 10:54:39,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 268. [2021-11-09 10:54:39,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 267 states have (on average 1.0337078651685394) internal successors, (276), 267 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:54:39,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 276 transitions. [2021-11-09 10:54:39,773 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 276 transitions. Word has length 265 [2021-11-09 10:54:39,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:54:39,774 INFO L470 AbstractCegarLoop]: Abstraction has 268 states and 276 transitions. [2021-11-09 10:54:39,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 111 states, 111 states have (on average 2.063063063063063) internal successors, (229), 111 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:54:39,774 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 276 transitions. [2021-11-09 10:54:39,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2021-11-09 10:54:39,775 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:54:39,775 INFO L513 BasicCegarLoop]: trace histogram [115, 108, 30, 7, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:54:39,822 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Ended with exit code 0 [2021-11-09 10:54:39,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable110 [2021-11-09 10:54:39,976 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:54:39,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:54:39,976 INFO L85 PathProgramCache]: Analyzing trace with hash 1985660391, now seen corresponding path program 107 times [2021-11-09 10:54:39,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:54:39,976 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464044443] [2021-11-09 10:54:39,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:54:39,976 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:54:40,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:54:45,018 INFO L134 CoverageAnalysis]: Checked inductivity of 13690 backedges. 1417 proven. 11772 refuted. 0 times theorem prover too weak. 501 trivial. 0 not checked. [2021-11-09 10:54:45,018 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:54:45,018 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464044443] [2021-11-09 10:54:45,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464044443] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:54:45,018 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389144747] [2021-11-09 10:54:45,018 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 10:54:45,019 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:54:45,019 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:54:45,019 INFO L229 MonitoredProcess]: Starting monitored process 109 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:54:45,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2021-11-09 10:54:52,001 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 116 check-sat command(s) [2021-11-09 10:54:52,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:54:52,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 670 conjuncts, 110 conjunts are in the unsatisfiable core [2021-11-09 10:54:52,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:54:52,799 INFO L134 CoverageAnalysis]: Checked inductivity of 13690 backedges. 1417 proven. 11772 refuted. 0 times theorem prover too weak. 501 trivial. 0 not checked. [2021-11-09 10:54:52,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389144747] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:54:52,800 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:54:52,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [111, 111] total 112 [2021-11-09 10:54:52,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425945976] [2021-11-09 10:54:52,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 112 states [2021-11-09 10:54:52,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:54:52,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2021-11-09 10:54:52,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6216, Invalid=6216, Unknown=0, NotChecked=0, Total=12432 [2021-11-09 10:54:52,803 INFO L87 Difference]: Start difference. First operand 268 states and 276 transitions. Second operand has 112 states, 112 states have (on average 2.0625) internal successors, (231), 112 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:54:53,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:54:53,199 INFO L93 Difference]: Finished difference Result 320 states and 337 transitions. [2021-11-09 10:54:53,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2021-11-09 10:54:53,199 INFO L78 Accepts]: Start accepts. Automaton has has 112 states, 112 states have (on average 2.0625) internal successors, (231), 112 states have internal predecessors, (231), 0 states have call successors, (0), 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 267 [2021-11-09 10:54:53,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:54:53,200 INFO L225 Difference]: With dead ends: 320 [2021-11-09 10:54:53,200 INFO L226 Difference]: Without dead ends: 270 [2021-11-09 10:54:53,202 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 377 GetRequests, 267 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=6216, Invalid=6216, Unknown=0, NotChecked=0, Total=12432 [2021-11-09 10:54:53,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2021-11-09 10:54:53,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 270. [2021-11-09 10:54:53,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 1.033457249070632) internal successors, (278), 269 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:54:53,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 278 transitions. [2021-11-09 10:54:53,342 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 278 transitions. Word has length 267 [2021-11-09 10:54:53,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:54:53,343 INFO L470 AbstractCegarLoop]: Abstraction has 270 states and 278 transitions. [2021-11-09 10:54:53,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 112 states, 112 states have (on average 2.0625) internal successors, (231), 112 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:54:53,343 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 278 transitions. [2021-11-09 10:54:53,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2021-11-09 10:54:53,344 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:54:53,344 INFO L513 BasicCegarLoop]: trace histogram [116, 109, 30, 7, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:54:53,390 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Forceful destruction successful, exit code 0 [2021-11-09 10:54:53,548 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111,109 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:54:53,548 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:54:53,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:54:53,548 INFO L85 PathProgramCache]: Analyzing trace with hash 2094895268, now seen corresponding path program 108 times [2021-11-09 10:54:53,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:54:53,549 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350896677] [2021-11-09 10:54:53,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:54:53,549 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:54:53,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:54:58,744 INFO L134 CoverageAnalysis]: Checked inductivity of 13921 backedges. 1430 proven. 11990 refuted. 0 times theorem prover too weak. 501 trivial. 0 not checked. [2021-11-09 10:54:58,745 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:54:58,745 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350896677] [2021-11-09 10:54:58,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350896677] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:54:58,745 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54654100] [2021-11-09 10:54:58,745 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 10:54:58,745 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:54:58,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:54:58,747 INFO L229 MonitoredProcess]: Starting monitored process 110 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:54:58,747 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2870591e-4249-40e1-9529-3540269bae1a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process