./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/openbsd_cstpcpy-alloca-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/openbsd_cstpcpy-alloca-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f22afdea3888c472e42c0b4bee511704d4ceb9c1e2d9f4db0ce5ffbd6de758f0 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-07 01:39:02,032 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-07 01:39:02,034 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-07 01:39:02,057 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-07 01:39:02,058 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-07 01:39:02,059 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-07 01:39:02,060 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-07 01:39:02,062 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-07 01:39:02,063 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-07 01:39:02,064 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-07 01:39:02,065 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-07 01:39:02,066 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-07 01:39:02,066 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-07 01:39:02,067 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-07 01:39:02,068 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-07 01:39:02,070 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-07 01:39:02,070 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-07 01:39:02,071 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-07 01:39:02,073 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-07 01:39:02,075 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-07 01:39:02,077 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-07 01:39:02,078 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-07 01:39:02,079 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-07 01:39:02,080 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-07 01:39:02,082 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-07 01:39:02,083 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-07 01:39:02,083 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-07 01:39:02,084 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-07 01:39:02,084 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-07 01:39:02,085 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-07 01:39:02,085 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-07 01:39:02,086 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-07 01:39:02,087 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-07 01:39:02,087 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-07 01:39:02,088 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-07 01:39:02,088 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-07 01:39:02,089 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-07 01:39:02,089 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-07 01:39:02,089 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-07 01:39:02,090 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-07 01:39:02,090 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-07 01:39:02,091 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-07 01:39:02,109 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-07 01:39:02,109 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-07 01:39:02,109 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-07 01:39:02,109 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-07 01:39:02,110 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-07 01:39:02,110 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-07 01:39:02,110 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-07 01:39:02,110 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-07 01:39:02,111 INFO L138 SettingsManager]: * Use SBE=true [2021-12-07 01:39:02,111 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-07 01:39:02,111 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-07 01:39:02,111 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-07 01:39:02,111 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-07 01:39:02,111 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-07 01:39:02,111 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-07 01:39:02,111 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-07 01:39:02,111 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-07 01:39:02,112 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-07 01:39:02,112 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-07 01:39:02,112 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-07 01:39:02,112 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-07 01:39:02,112 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-07 01:39:02,112 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-07 01:39:02,112 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-07 01:39:02,112 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-07 01:39:02,112 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-07 01:39:02,113 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-07 01:39:02,113 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-07 01:39:02,113 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-07 01:39:02,113 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-07 01:39:02,113 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-07 01:39:02,113 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_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f22afdea3888c472e42c0b4bee511704d4ceb9c1e2d9f4db0ce5ffbd6de758f0 [2021-12-07 01:39:02,309 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-07 01:39:02,327 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-07 01:39:02,329 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-07 01:39:02,330 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-07 01:39:02,330 INFO L275 PluginConnector]: CDTParser initialized [2021-12-07 01:39:02,331 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/array-memsafety/openbsd_cstpcpy-alloca-1.i [2021-12-07 01:39:02,380 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/data/8e3949538/70e115828eb14beda769ad21ad1bf5df/FLAG468b899f3 [2021-12-07 01:39:02,837 INFO L306 CDTParser]: Found 1 translation units. [2021-12-07 01:39:02,837 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/sv-benchmarks/c/array-memsafety/openbsd_cstpcpy-alloca-1.i [2021-12-07 01:39:02,848 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/data/8e3949538/70e115828eb14beda769ad21ad1bf5df/FLAG468b899f3 [2021-12-07 01:39:02,858 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/data/8e3949538/70e115828eb14beda769ad21ad1bf5df [2021-12-07 01:39:02,860 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-07 01:39:02,861 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-07 01:39:02,862 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-07 01:39:02,862 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-07 01:39:02,865 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-07 01:39:02,865 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 01:39:02" (1/1) ... [2021-12-07 01:39:02,866 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11c686b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:39:02, skipping insertion in model container [2021-12-07 01:39:02,866 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 01:39:02" (1/1) ... [2021-12-07 01:39:02,871 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-07 01:39:02,894 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-07 01:39:03,073 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-07 01:39:03,079 INFO L203 MainTranslator]: Completed pre-run [2021-12-07 01:39:03,106 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-07 01:39:03,126 INFO L208 MainTranslator]: Completed translation [2021-12-07 01:39:03,127 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:39:03 WrapperNode [2021-12-07 01:39:03,127 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-07 01:39:03,128 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-07 01:39:03,128 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-07 01:39:03,128 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-07 01:39:03,133 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:39:03" (1/1) ... [2021-12-07 01:39:03,143 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:39:03" (1/1) ... [2021-12-07 01:39:03,159 INFO L137 Inliner]: procedures = 117, calls = 13, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 64 [2021-12-07 01:39:03,159 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-07 01:39:03,159 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-07 01:39:03,160 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-07 01:39:03,160 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-07 01:39:03,165 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:39:03" (1/1) ... [2021-12-07 01:39:03,165 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:39:03" (1/1) ... [2021-12-07 01:39:03,168 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:39:03" (1/1) ... [2021-12-07 01:39:03,168 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:39:03" (1/1) ... [2021-12-07 01:39:03,172 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:39:03" (1/1) ... [2021-12-07 01:39:03,175 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:39:03" (1/1) ... [2021-12-07 01:39:03,176 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:39:03" (1/1) ... [2021-12-07 01:39:03,178 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-07 01:39:03,178 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-07 01:39:03,178 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-07 01:39:03,179 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-07 01:39:03,179 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:39:03" (1/1) ... [2021-12-07 01:39:03,185 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-07 01:39:03,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:39:03,203 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-07 01:39:03,205 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-07 01:39:03,240 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-07 01:39:03,240 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-07 01:39:03,240 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-07 01:39:03,240 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-07 01:39:03,240 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-07 01:39:03,240 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-07 01:39:03,311 INFO L236 CfgBuilder]: Building ICFG [2021-12-07 01:39:03,313 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-07 01:39:03,414 INFO L277 CfgBuilder]: Performing block encoding [2021-12-07 01:39:03,418 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-07 01:39:03,418 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-07 01:39:03,420 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 01:39:03 BoogieIcfgContainer [2021-12-07 01:39:03,420 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-07 01:39:03,421 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-07 01:39:03,421 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-07 01:39:03,424 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-07 01:39:03,424 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 01:39:02" (1/3) ... [2021-12-07 01:39:03,424 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3594509e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 01:39:03, skipping insertion in model container [2021-12-07 01:39:03,424 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:39:03" (2/3) ... [2021-12-07 01:39:03,425 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3594509e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 01:39:03, skipping insertion in model container [2021-12-07 01:39:03,425 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 01:39:03" (3/3) ... [2021-12-07 01:39:03,426 INFO L111 eAbstractionObserver]: Analyzing ICFG openbsd_cstpcpy-alloca-1.i [2021-12-07 01:39:03,429 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-07 01:39:03,430 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 9 error locations. [2021-12-07 01:39:03,461 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-07 01:39:03,466 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=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-07 01:39:03,466 INFO L340 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2021-12-07 01:39:03,476 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 28 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) [2021-12-07 01:39:03,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-07 01:39:03,480 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:39:03,481 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-07 01:39:03,481 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-07 01:39:03,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:39:03,485 INFO L85 PathProgramCache]: Analyzing trace with hash 889510840, now seen corresponding path program 1 times [2021-12-07 01:39:03,491 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:39:03,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314482141] [2021-12-07 01:39:03,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:39:03,492 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:39:03,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:39:03,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:39:03,620 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:39:03,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314482141] [2021-12-07 01:39:03,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314482141] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:39:03,621 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:39:03,621 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-07 01:39:03,622 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174078430] [2021-12-07 01:39:03,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:39:03,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-07 01:39:03,626 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:39:03,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-07 01:39:03,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-07 01:39:03,648 INFO L87 Difference]: Start difference. First operand has 29 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 28 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) Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:39:03,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:39:03,702 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2021-12-07 01:39:03,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-07 01:39:03,705 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 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 6 [2021-12-07 01:39:03,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:39:03,713 INFO L225 Difference]: With dead ends: 34 [2021-12-07 01:39:03,713 INFO L226 Difference]: Without dead ends: 30 [2021-12-07 01:39:03,715 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-07 01:39:03,719 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 56 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:39:03,720 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 35 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 01:39:03,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-12-07 01:39:03,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2021-12-07 01:39:03,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 27 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) [2021-12-07 01:39:03,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2021-12-07 01:39:03,747 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 6 [2021-12-07 01:39:03,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:39:03,748 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2021-12-07 01:39:03,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:39:03,748 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2021-12-07 01:39:03,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-07 01:39:03,749 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:39:03,749 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-07 01:39:03,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-07 01:39:03,749 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-07 01:39:03,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:39:03,750 INFO L85 PathProgramCache]: Analyzing trace with hash 889512762, now seen corresponding path program 1 times [2021-12-07 01:39:03,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:39:03,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252327756] [2021-12-07 01:39:03,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:39:03,751 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:39:03,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:39:03,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:39:03,778 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:39:03,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252327756] [2021-12-07 01:39:03,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252327756] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:39:03,778 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:39:03,778 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-07 01:39:03,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473546760] [2021-12-07 01:39:03,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:39:03,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 01:39:03,780 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:39:03,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 01:39:03,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:39:03,781 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:39:03,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:39:03,801 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2021-12-07 01:39:03,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 01:39:03,802 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 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 6 [2021-12-07 01:39:03,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:39:03,803 INFO L225 Difference]: With dead ends: 29 [2021-12-07 01:39:03,803 INFO L226 Difference]: Without dead ends: 28 [2021-12-07 01:39:03,803 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:39:03,805 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 2 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:39:03,806 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 43 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 01:39:03,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-12-07 01:39:03,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2021-12-07 01:39:03,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 26 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:39:03,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2021-12-07 01:39:03,811 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 6 [2021-12-07 01:39:03,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:39:03,811 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2021-12-07 01:39:03,811 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:39:03,811 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2021-12-07 01:39:03,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-07 01:39:03,812 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:39:03,812 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:39:03,812 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-07 01:39:03,812 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-07 01:39:03,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:39:03,813 INFO L85 PathProgramCache]: Analyzing trace with hash 1805033015, now seen corresponding path program 1 times [2021-12-07 01:39:03,813 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:39:03,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011009583] [2021-12-07 01:39:03,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:39:03,814 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:39:03,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:39:03,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:39:03,866 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:39:03,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011009583] [2021-12-07 01:39:03,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011009583] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:39:03,867 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:39:03,867 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-07 01:39:03,867 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683248339] [2021-12-07 01:39:03,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:39:03,868 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-07 01:39:03,868 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:39:03,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-07 01:39:03,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-07 01:39:03,869 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 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) [2021-12-07 01:39:03,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:39:03,890 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2021-12-07 01:39:03,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-07 01:39:03,891 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 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 [2021-12-07 01:39:03,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:39:03,891 INFO L225 Difference]: With dead ends: 33 [2021-12-07 01:39:03,891 INFO L226 Difference]: Without dead ends: 33 [2021-12-07 01:39:03,891 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-07 01:39:03,893 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 34 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:39:03,893 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 41 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 01:39:03,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-12-07 01:39:03,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 28. [2021-12-07 01:39:03,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 19 states have (on average 1.631578947368421) internal successors, (31), 27 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) [2021-12-07 01:39:03,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2021-12-07 01:39:03,896 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 7 [2021-12-07 01:39:03,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:39:03,896 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2021-12-07 01:39:03,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 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) [2021-12-07 01:39:03,897 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2021-12-07 01:39:03,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-07 01:39:03,897 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:39:03,897 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:39:03,897 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-07 01:39:03,897 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-07 01:39:03,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:39:03,898 INFO L85 PathProgramCache]: Analyzing trace with hash 1805033068, now seen corresponding path program 1 times [2021-12-07 01:39:03,898 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:39:03,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926412841] [2021-12-07 01:39:03,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:39:03,898 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:39:03,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:39:03,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:39:03,928 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:39:03,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926412841] [2021-12-07 01:39:03,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926412841] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:39:03,928 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:39:03,928 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-07 01:39:03,928 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736331906] [2021-12-07 01:39:03,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:39:03,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 01:39:03,929 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:39:03,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 01:39:03,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:39:03,929 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 3 states, 2 states have (on average 3.5) 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) [2021-12-07 01:39:03,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:39:03,943 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2021-12-07 01:39:03,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 01:39:03,944 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) 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 [2021-12-07 01:39:03,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:39:03,945 INFO L225 Difference]: With dead ends: 26 [2021-12-07 01:39:03,945 INFO L226 Difference]: Without dead ends: 26 [2021-12-07 01:39:03,945 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:39:03,947 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 18 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:39:03,947 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 22 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 01:39:03,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-12-07 01:39:03,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-12-07 01:39:03,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 25 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) [2021-12-07 01:39:03,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2021-12-07 01:39:03,951 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 7 [2021-12-07 01:39:03,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:39:03,952 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2021-12-07 01:39:03,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) 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) [2021-12-07 01:39:03,952 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2021-12-07 01:39:03,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-07 01:39:03,952 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:39:03,952 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:39:03,953 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-07 01:39:03,953 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-07 01:39:03,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:39:03,953 INFO L85 PathProgramCache]: Analyzing trace with hash 1805033069, now seen corresponding path program 1 times [2021-12-07 01:39:03,954 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:39:03,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564849809] [2021-12-07 01:39:03,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:39:03,954 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:39:03,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:39:04,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:39:04,020 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:39:04,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564849809] [2021-12-07 01:39:04,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564849809] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:39:04,021 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:39:04,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-07 01:39:04,021 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024035132] [2021-12-07 01:39:04,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:39:04,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-07 01:39:04,021 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:39:04,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-07 01:39:04,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-07 01:39:04,022 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 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) [2021-12-07 01:39:04,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:39:04,052 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2021-12-07 01:39:04,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-07 01:39:04,053 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 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 [2021-12-07 01:39:04,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:39:04,053 INFO L225 Difference]: With dead ends: 29 [2021-12-07 01:39:04,054 INFO L226 Difference]: Without dead ends: 29 [2021-12-07 01:39:04,054 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-07 01:39:04,055 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 28 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:39:04,055 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 47 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 01:39:04,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-12-07 01:39:04,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2021-12-07 01:39:04,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 20 states have (on average 1.5) internal successors, (30), 26 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:39:04,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2021-12-07 01:39:04,058 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 7 [2021-12-07 01:39:04,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:39:04,058 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2021-12-07 01:39:04,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 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) [2021-12-07 01:39:04,058 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2021-12-07 01:39:04,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-07 01:39:04,059 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:39:04,059 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:39:04,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-07 01:39:04,059 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-07 01:39:04,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:39:04,060 INFO L85 PathProgramCache]: Analyzing trace with hash 1762264955, now seen corresponding path program 1 times [2021-12-07 01:39:04,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:39:04,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556413547] [2021-12-07 01:39:04,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:39:04,060 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:39:04,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:39:04,135 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:39:04,135 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:39:04,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556413547] [2021-12-07 01:39:04,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556413547] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:39:04,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924184125] [2021-12-07 01:39:04,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:39:04,136 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:39:04,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:39:04,137 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:39:04,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-07 01:39:04,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:39:04,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-07 01:39:04,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:39:04,281 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:39:04,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:39:04,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-12-07 01:39:04,400 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:39:04,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924184125] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:39:04,401 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:39:04,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2021-12-07 01:39:04,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905330873] [2021-12-07 01:39:04,401 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:39:04,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-07 01:39:04,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:39:04,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-07 01:39:04,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-12-07 01:39:04,402 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 10 states, 9 states have (on average 2.7777777777777777) 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) [2021-12-07 01:39:04,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:39:04,489 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2021-12-07 01:39:04,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-07 01:39:04,489 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.7777777777777777) 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 11 [2021-12-07 01:39:04,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:39:04,490 INFO L225 Difference]: With dead ends: 48 [2021-12-07 01:39:04,490 INFO L226 Difference]: Without dead ends: 48 [2021-12-07 01:39:04,490 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-12-07 01:39:04,491 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 65 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 01:39:04,491 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 98 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 01:39:04,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-12-07 01:39:04,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 34. [2021-12-07 01:39:04,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 33 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) [2021-12-07 01:39:04,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2021-12-07 01:39:04,494 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 11 [2021-12-07 01:39:04,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:39:04,494 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2021-12-07 01:39:04,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.7777777777777777) 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) [2021-12-07 01:39:04,495 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2021-12-07 01:39:04,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-07 01:39:04,495 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:39:04,495 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:39:04,515 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-07 01:39:04,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:39:04,697 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-07 01:39:04,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:39:04,699 INFO L85 PathProgramCache]: Analyzing trace with hash 952918329, now seen corresponding path program 1 times [2021-12-07 01:39:04,699 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:39:04,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791770975] [2021-12-07 01:39:04,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:39:04,700 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:39:04,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:39:04,885 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:39:04,885 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:39:04,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791770975] [2021-12-07 01:39:04,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791770975] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:39:04,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401834545] [2021-12-07 01:39:04,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:39:04,886 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:39:04,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:39:04,887 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:39:04,887 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-07 01:39:04,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:39:04,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-07 01:39:04,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:39:04,997 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:39:04,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:39:05,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-12-07 01:39:05,106 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:39:05,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401834545] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:39:05,107 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:39:05,107 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2021-12-07 01:39:05,107 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597431170] [2021-12-07 01:39:05,107 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:39:05,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-07 01:39:05,107 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:39:05,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-07 01:39:05,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-12-07 01:39:05,108 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 12 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) [2021-12-07 01:39:05,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:39:05,234 INFO L93 Difference]: Finished difference Result 76 states and 83 transitions. [2021-12-07 01:39:05,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-07 01:39:05,234 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 12 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) Word has length 11 [2021-12-07 01:39:05,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:39:05,235 INFO L225 Difference]: With dead ends: 76 [2021-12-07 01:39:05,235 INFO L226 Difference]: Without dead ends: 76 [2021-12-07 01:39:05,235 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2021-12-07 01:39:05,236 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 191 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 01:39:05,236 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 102 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 01:39:05,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-12-07 01:39:05,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 35. [2021-12-07 01:39:05,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 28 states have (on average 1.4285714285714286) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:39:05,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2021-12-07 01:39:05,239 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 11 [2021-12-07 01:39:05,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:39:05,240 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2021-12-07 01:39:05,240 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 12 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) [2021-12-07 01:39:05,240 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2021-12-07 01:39:05,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-07 01:39:05,240 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:39:05,240 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:39:05,259 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-07 01:39:05,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:39:05,442 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-07 01:39:05,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:39:05,443 INFO L85 PathProgramCache]: Analyzing trace with hash 1632976699, now seen corresponding path program 1 times [2021-12-07 01:39:05,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:39:05,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114019611] [2021-12-07 01:39:05,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:39:05,445 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:39:05,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:39:05,532 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:39:05,532 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:39:05,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114019611] [2021-12-07 01:39:05,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114019611] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:39:05,532 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:39:05,532 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-07 01:39:05,532 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884439892] [2021-12-07 01:39:05,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:39:05,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-07 01:39:05,533 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:39:05,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-07 01:39:05,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-12-07 01:39:05,533 INFO L87 Difference]: Start difference. First operand 35 states and 40 transitions. Second operand has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 7 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) [2021-12-07 01:39:05,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:39:05,565 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2021-12-07 01:39:05,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-07 01:39:05,565 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 7 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 11 [2021-12-07 01:39:05,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:39:05,566 INFO L225 Difference]: With dead ends: 34 [2021-12-07 01:39:05,566 INFO L226 Difference]: Without dead ends: 34 [2021-12-07 01:39:05,566 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=39, Unknown=0, NotChecked=0, Total=72 [2021-12-07 01:39:05,566 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 55 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:39:05,567 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 32 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 01:39:05,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-12-07 01:39:05,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2021-12-07 01:39:05,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 32 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) [2021-12-07 01:39:05,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2021-12-07 01:39:05,569 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 11 [2021-12-07 01:39:05,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:39:05,569 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2021-12-07 01:39:05,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 7 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) [2021-12-07 01:39:05,570 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2021-12-07 01:39:05,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-07 01:39:05,570 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:39:05,570 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:39:05,570 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-07 01:39:05,570 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-07 01:39:05,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:39:05,570 INFO L85 PathProgramCache]: Analyzing trace with hash 1632976752, now seen corresponding path program 1 times [2021-12-07 01:39:05,571 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:39:05,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594166741] [2021-12-07 01:39:05,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:39:05,571 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:39:05,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:39:05,612 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:39:05,612 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:39:05,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594166741] [2021-12-07 01:39:05,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594166741] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:39:05,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007009051] [2021-12-07 01:39:05,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:39:05,613 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:39:05,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:39:05,613 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:39:05,614 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-07 01:39:05,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:39:05,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-07 01:39:05,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:39:05,664 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 01:39:05,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-07 01:39:05,704 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:39:05,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:39:05,800 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:39:05,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007009051] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:39:05,800 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:39:05,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2021-12-07 01:39:05,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795832294] [2021-12-07 01:39:05,800 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:39:05,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-07 01:39:05,800 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:39:05,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-07 01:39:05,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-12-07 01:39:05,801 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand has 9 states, 8 states have (on average 2.875) 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) [2021-12-07 01:39:05,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:39:05,844 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2021-12-07 01:39:05,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-07 01:39:05,844 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.875) 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 11 [2021-12-07 01:39:05,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:39:05,844 INFO L225 Difference]: With dead ends: 37 [2021-12-07 01:39:05,844 INFO L226 Difference]: Without dead ends: 37 [2021-12-07 01:39:05,845 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-12-07 01:39:05,845 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 75 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:39:05,845 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 42 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 01:39:05,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-12-07 01:39:05,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 24. [2021-12-07 01:39:05,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 23 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:39:05,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2021-12-07 01:39:05,847 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 11 [2021-12-07 01:39:05,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:39:05,848 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2021-12-07 01:39:05,848 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.875) 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) [2021-12-07 01:39:05,848 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2021-12-07 01:39:05,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-07 01:39:05,848 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:39:05,848 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:39:05,867 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-07 01:39:06,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-12-07 01:39:06,050 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-07 01:39:06,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:39:06,051 INFO L85 PathProgramCache]: Analyzing trace with hash 1319506494, now seen corresponding path program 1 times [2021-12-07 01:39:06,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:39:06,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328321777] [2021-12-07 01:39:06,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:39:06,053 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:39:06,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:39:06,145 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:39:06,146 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:39:06,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328321777] [2021-12-07 01:39:06,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328321777] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:39:06,147 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:39:06,147 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 01:39:06,148 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907326039] [2021-12-07 01:39:06,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:39:06,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-07 01:39:06,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:39:06,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-07 01:39:06,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-07 01:39:06,150 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 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) [2021-12-07 01:39:06,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:39:06,194 INFO L93 Difference]: Finished difference Result 23 states and 26 transitions. [2021-12-07 01:39:06,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-07 01:39:06,195 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 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 13 [2021-12-07 01:39:06,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:39:06,195 INFO L225 Difference]: With dead ends: 23 [2021-12-07 01:39:06,195 INFO L226 Difference]: Without dead ends: 23 [2021-12-07 01:39:06,196 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-07 01:39:06,196 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 18 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:39:06,197 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 28 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 01:39:06,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-12-07 01:39:06,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-12-07 01:39:06,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 19 states have (on average 1.368421052631579) internal successors, (26), 22 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) [2021-12-07 01:39:06,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2021-12-07 01:39:06,199 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 13 [2021-12-07 01:39:06,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:39:06,199 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2021-12-07 01:39:06,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 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) [2021-12-07 01:39:06,199 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2021-12-07 01:39:06,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-07 01:39:06,200 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:39:06,200 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:39:06,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-07 01:39:06,200 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-07 01:39:06,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:39:06,200 INFO L85 PathProgramCache]: Analyzing trace with hash 1319506495, now seen corresponding path program 1 times [2021-12-07 01:39:06,200 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:39:06,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831044655] [2021-12-07 01:39:06,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:39:06,201 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:39:06,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:39:06,245 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:39:06,245 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:39:06,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831044655] [2021-12-07 01:39:06,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831044655] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:39:06,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092331166] [2021-12-07 01:39:06,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:39:06,246 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:39:06,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:39:06,247 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:39:06,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-07 01:39:06,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:39:06,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-07 01:39:06,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:39:06,337 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:39:06,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:39:06,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-12-07 01:39:06,382 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:39:06,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2092331166] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:39:06,382 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:39:06,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2021-12-07 01:39:06,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333082016] [2021-12-07 01:39:06,383 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:39:06,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-07 01:39:06,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:39:06,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-07 01:39:06,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-12-07 01:39:06,384 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 9 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:39:06,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:39:06,451 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2021-12-07 01:39:06,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-07 01:39:06,451 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 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 13 [2021-12-07 01:39:06,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:39:06,451 INFO L225 Difference]: With dead ends: 36 [2021-12-07 01:39:06,451 INFO L226 Difference]: Without dead ends: 36 [2021-12-07 01:39:06,452 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-12-07 01:39:06,452 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 88 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:39:06,452 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 56 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 01:39:06,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-12-07 01:39:06,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 24. [2021-12-07 01:39:06,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 20 states have (on average 1.35) internal successors, (27), 23 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:39:06,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2021-12-07 01:39:06,455 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 13 [2021-12-07 01:39:06,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:39:06,455 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2021-12-07 01:39:06,455 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:39:06,456 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2021-12-07 01:39:06,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-07 01:39:06,456 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:39:06,456 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:39:06,476 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-07 01:39:06,657 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-07 01:39:06,658 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-07 01:39:06,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:39:06,659 INFO L85 PathProgramCache]: Analyzing trace with hash -2044971629, now seen corresponding path program 1 times [2021-12-07 01:39:06,659 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:39:06,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688056923] [2021-12-07 01:39:06,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:39:06,660 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:39:06,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:39:06,811 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-07 01:39:06,811 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:39:06,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688056923] [2021-12-07 01:39:06,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688056923] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:39:06,812 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:39:06,812 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-07 01:39:06,812 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351527197] [2021-12-07 01:39:06,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:39:06,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-07 01:39:06,813 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:39:06,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-07 01:39:06,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-07 01:39:06,813 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 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) [2021-12-07 01:39:06,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:39:06,848 INFO L93 Difference]: Finished difference Result 23 states and 26 transitions. [2021-12-07 01:39:06,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-07 01:39:06,848 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 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) Word has length 14 [2021-12-07 01:39:06,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:39:06,849 INFO L225 Difference]: With dead ends: 23 [2021-12-07 01:39:06,849 INFO L226 Difference]: Without dead ends: 23 [2021-12-07 01:39:06,849 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-07 01:39:06,850 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 21 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:39:06,850 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 27 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 01:39:06,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-12-07 01:39:06,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-12-07 01:39:06,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 20 states have (on average 1.3) internal successors, (26), 22 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) [2021-12-07 01:39:06,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2021-12-07 01:39:06,853 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 14 [2021-12-07 01:39:06,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:39:06,858 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2021-12-07 01:39:06,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 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) [2021-12-07 01:39:06,858 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2021-12-07 01:39:06,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-07 01:39:06,859 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:39:06,859 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:39:06,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-07 01:39:06,859 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-07 01:39:06,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:39:06,859 INFO L85 PathProgramCache]: Analyzing trace with hash -2044971628, now seen corresponding path program 1 times [2021-12-07 01:39:06,859 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:39:06,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033917644] [2021-12-07 01:39:06,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:39:06,859 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:39:06,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:39:06,895 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-07 01:39:06,895 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:39:06,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033917644] [2021-12-07 01:39:06,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033917644] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:39:06,895 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:39:06,895 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-07 01:39:06,896 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805811579] [2021-12-07 01:39:06,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:39:06,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-07 01:39:06,896 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:39:06,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-07 01:39:06,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-07 01:39:06,896 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 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) [2021-12-07 01:39:06,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:39:06,923 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2021-12-07 01:39:06,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-07 01:39:06,924 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 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) Word has length 14 [2021-12-07 01:39:06,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:39:06,924 INFO L225 Difference]: With dead ends: 30 [2021-12-07 01:39:06,924 INFO L226 Difference]: Without dead ends: 30 [2021-12-07 01:39:06,925 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-07 01:39:06,925 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 50 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:39:06,926 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 34 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 01:39:06,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-12-07 01:39:06,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 24. [2021-12-07 01:39:06,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 23 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:39:06,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2021-12-07 01:39:06,928 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 14 [2021-12-07 01:39:06,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:39:06,928 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2021-12-07 01:39:06,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 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) [2021-12-07 01:39:06,929 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2021-12-07 01:39:06,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-07 01:39:06,929 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:39:06,929 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:39:06,929 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-07 01:39:06,929 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-07 01:39:06,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:39:06,930 INFO L85 PathProgramCache]: Analyzing trace with hash -1933649190, now seen corresponding path program 1 times [2021-12-07 01:39:06,930 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:39:06,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388604423] [2021-12-07 01:39:06,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:39:06,930 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:39:06,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:39:07,002 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-07 01:39:07,002 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:39:07,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388604423] [2021-12-07 01:39:07,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388604423] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:39:07,003 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:39:07,003 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-07 01:39:07,003 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020012734] [2021-12-07 01:39:07,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:39:07,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-07 01:39:07,003 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:39:07,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-07 01:39:07,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-07 01:39:07,004 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 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) [2021-12-07 01:39:07,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:39:07,047 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2021-12-07 01:39:07,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-07 01:39:07,047 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 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 17 [2021-12-07 01:39:07,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:39:07,048 INFO L225 Difference]: With dead ends: 39 [2021-12-07 01:39:07,048 INFO L226 Difference]: Without dead ends: 39 [2021-12-07 01:39:07,048 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-12-07 01:39:07,049 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 27 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:39:07,049 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 75 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 01:39:07,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-12-07 01:39:07,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 35. [2021-12-07 01:39:07,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 32 states have (on average 1.21875) internal successors, (39), 34 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) [2021-12-07 01:39:07,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2021-12-07 01:39:07,052 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 17 [2021-12-07 01:39:07,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:39:07,053 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2021-12-07 01:39:07,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 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) [2021-12-07 01:39:07,053 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2021-12-07 01:39:07,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-07 01:39:07,053 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:39:07,054 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:39:07,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-07 01:39:07,054 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-07 01:39:07,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:39:07,054 INFO L85 PathProgramCache]: Analyzing trace with hash 1350200856, now seen corresponding path program 1 times [2021-12-07 01:39:07,054 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:39:07,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887406711] [2021-12-07 01:39:07,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:39:07,055 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:39:07,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:39:07,126 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-07 01:39:07,126 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:39:07,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887406711] [2021-12-07 01:39:07,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887406711] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:39:07,126 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:39:07,127 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-07 01:39:07,127 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659098641] [2021-12-07 01:39:07,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:39:07,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-07 01:39:07,127 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:39:07,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-07 01:39:07,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-07 01:39:07,128 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-12-07 01:39:07,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:39:07,189 INFO L93 Difference]: Finished difference Result 62 states and 68 transitions. [2021-12-07 01:39:07,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-07 01:39:07,189 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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 17 [2021-12-07 01:39:07,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:39:07,190 INFO L225 Difference]: With dead ends: 62 [2021-12-07 01:39:07,190 INFO L226 Difference]: Without dead ends: 62 [2021-12-07 01:39:07,190 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-12-07 01:39:07,191 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 41 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:39:07,191 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 93 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 01:39:07,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-12-07 01:39:07,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 36. [2021-12-07 01:39:07,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 35 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) [2021-12-07 01:39:07,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2021-12-07 01:39:07,194 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 17 [2021-12-07 01:39:07,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:39:07,195 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2021-12-07 01:39:07,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-12-07 01:39:07,195 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2021-12-07 01:39:07,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-07 01:39:07,195 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:39:07,196 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:39:07,196 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-07 01:39:07,196 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-07 01:39:07,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:39:07,196 INFO L85 PathProgramCache]: Analyzing trace with hash 70337178, now seen corresponding path program 1 times [2021-12-07 01:39:07,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:39:07,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757044473] [2021-12-07 01:39:07,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:39:07,197 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:39:07,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:39:07,293 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:39:07,293 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:39:07,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757044473] [2021-12-07 01:39:07,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757044473] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:39:07,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215647371] [2021-12-07 01:39:07,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:39:07,294 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:39:07,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:39:07,294 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:39:07,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-07 01:39:07,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:39:07,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 21 conjunts are in the unsatisfiable core [2021-12-07 01:39:07,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:39:07,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-07 01:39:07,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-07 01:39:07,433 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:39:07,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:39:07,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2021-12-07 01:39:07,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-12-07 01:39:07,510 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:39:07,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215647371] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:39:07,511 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:39:07,511 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2021-12-07 01:39:07,511 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378167049] [2021-12-07 01:39:07,511 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:39:07,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-07 01:39:07,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:39:07,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-07 01:39:07,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-12-07 01:39:07,512 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:39:07,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:39:07,629 INFO L93 Difference]: Finished difference Result 71 states and 78 transitions. [2021-12-07 01:39:07,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-07 01:39:07,630 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 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 17 [2021-12-07 01:39:07,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:39:07,631 INFO L225 Difference]: With dead ends: 71 [2021-12-07 01:39:07,631 INFO L226 Difference]: Without dead ends: 71 [2021-12-07 01:39:07,631 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=164, Invalid=388, Unknown=0, NotChecked=0, Total=552 [2021-12-07 01:39:07,632 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 100 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:39:07,632 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 92 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 01:39:07,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-12-07 01:39:07,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 40. [2021-12-07 01:39:07,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 37 states have (on average 1.2432432432432432) internal successors, (46), 39 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) [2021-12-07 01:39:07,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2021-12-07 01:39:07,636 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 17 [2021-12-07 01:39:07,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:39:07,636 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2021-12-07 01:39:07,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:39:07,636 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2021-12-07 01:39:07,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-07 01:39:07,637 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:39:07,637 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:39:07,656 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-07 01:39:07,837 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-07 01:39:07,838 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-07 01:39:07,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:39:07,839 INFO L85 PathProgramCache]: Analyzing trace with hash 186362076, now seen corresponding path program 1 times [2021-12-07 01:39:07,840 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:39:07,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834924806] [2021-12-07 01:39:07,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:39:07,841 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:39:07,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:39:07,984 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-07 01:39:07,984 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:39:07,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834924806] [2021-12-07 01:39:07,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834924806] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:39:07,985 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:39:07,985 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 01:39:07,985 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857070646] [2021-12-07 01:39:07,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:39:07,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-07 01:39:07,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:39:07,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-07 01:39:07,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-07 01:39:07,988 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 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) [2021-12-07 01:39:08,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:39:08,005 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2021-12-07 01:39:08,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-07 01:39:08,006 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 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) Word has length 18 [2021-12-07 01:39:08,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:39:08,006 INFO L225 Difference]: With dead ends: 39 [2021-12-07 01:39:08,006 INFO L226 Difference]: Without dead ends: 24 [2021-12-07 01:39:08,006 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-07 01:39:08,007 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 6 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:39:08,007 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 32 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 01:39:08,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-12-07 01:39:08,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-12-07 01:39:08,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 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) [2021-12-07 01:39:08,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2021-12-07 01:39:08,010 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 18 [2021-12-07 01:39:08,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:39:08,010 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2021-12-07 01:39:08,010 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 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) [2021-12-07 01:39:08,010 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2021-12-07 01:39:08,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-07 01:39:08,010 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:39:08,010 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:39:08,011 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-07 01:39:08,011 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-07 01:39:08,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:39:08,011 INFO L85 PathProgramCache]: Analyzing trace with hash -2146020323, now seen corresponding path program 2 times [2021-12-07 01:39:08,011 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:39:08,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826942451] [2021-12-07 01:39:08,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:39:08,011 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:39:08,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:39:08,078 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:39:08,078 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:39:08,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826942451] [2021-12-07 01:39:08,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826942451] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:39:08,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003152476] [2021-12-07 01:39:08,079 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 01:39:08,079 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:39:08,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:39:08,080 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:39:08,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-07 01:39:08,120 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-07 01:39:08,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:39:08,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-07 01:39:08,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:39:08,197 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:39:08,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:39:08,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-07 01:39:08,273 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:39:08,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003152476] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:39:08,273 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:39:08,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 17 [2021-12-07 01:39:08,274 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779199225] [2021-12-07 01:39:08,274 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:39:08,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-07 01:39:08,274 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:39:08,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-07 01:39:08,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-12-07 01:39:08,275 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 18 states, 17 states have (on average 2.588235294117647) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:39:08,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:39:08,355 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2021-12-07 01:39:08,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-07 01:39:08,355 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.588235294117647) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-12-07 01:39:08,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:39:08,355 INFO L225 Difference]: With dead ends: 31 [2021-12-07 01:39:08,356 INFO L226 Difference]: Without dead ends: 31 [2021-12-07 01:39:08,356 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=111, Invalid=351, Unknown=0, NotChecked=0, Total=462 [2021-12-07 01:39:08,356 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 125 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:39:08,357 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 62 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 01:39:08,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-12-07 01:39:08,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 27. [2021-12-07 01:39:08,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 25 states have (on average 1.12) internal successors, (28), 26 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) [2021-12-07 01:39:08,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2021-12-07 01:39:08,359 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 21 [2021-12-07 01:39:08,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:39:08,359 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2021-12-07 01:39:08,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.588235294117647) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:39:08,360 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2021-12-07 01:39:08,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-07 01:39:08,360 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:39:08,360 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:39:08,382 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-07 01:39:08,561 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-07 01:39:08,562 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-07 01:39:08,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:39:08,563 INFO L85 PathProgramCache]: Analyzing trace with hash -2102120586, now seen corresponding path program 1 times [2021-12-07 01:39:08,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:39:08,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825545725] [2021-12-07 01:39:08,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:39:08,564 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:39:08,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:39:08,759 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:39:08,759 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:39:08,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825545725] [2021-12-07 01:39:08,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825545725] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:39:08,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179870475] [2021-12-07 01:39:08,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:39:08,759 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:39:08,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:39:08,760 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:39:08,761 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-07 01:39:08,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:39:08,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-07 01:39:08,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:39:08,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:39:08,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-07 01:39:08,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-07 01:39:08,897 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:39:08,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:39:09,042 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:39:09,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179870475] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:39:09,043 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:39:09,043 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 17 [2021-12-07 01:39:09,043 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787691488] [2021-12-07 01:39:09,043 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:39:09,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-07 01:39:09,043 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:39:09,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-07 01:39:09,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-12-07 01:39:09,044 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand has 18 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:39:09,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:39:09,163 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2021-12-07 01:39:09,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-07 01:39:09,164 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 18 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 22 [2021-12-07 01:39:09,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:39:09,164 INFO L225 Difference]: With dead ends: 30 [2021-12-07 01:39:09,164 INFO L226 Difference]: Without dead ends: 30 [2021-12-07 01:39:09,164 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2021-12-07 01:39:09,165 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 68 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 01:39:09,165 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 60 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 01:39:09,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-12-07 01:39:09,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2021-12-07 01:39:09,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 27 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) [2021-12-07 01:39:09,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2021-12-07 01:39:09,166 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 22 [2021-12-07 01:39:09,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:39:09,166 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2021-12-07 01:39:09,167 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:39:09,167 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2021-12-07 01:39:09,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-07 01:39:09,167 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:39:09,167 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:39:09,186 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-07 01:39:09,368 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:39:09,369 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-07 01:39:09,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:39:09,370 INFO L85 PathProgramCache]: Analyzing trace with hash 643759544, now seen corresponding path program 3 times [2021-12-07 01:39:09,370 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:39:09,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273454314] [2021-12-07 01:39:09,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:39:09,371 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:39:09,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:39:09,584 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:39:09,584 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:39:09,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273454314] [2021-12-07 01:39:09,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273454314] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:39:09,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665260201] [2021-12-07 01:39:09,585 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-07 01:39:09,585 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:39:09,585 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:39:09,585 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:39:09,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-07 01:39:09,637 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-07 01:39:09,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:39:09,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 39 conjunts are in the unsatisfiable core [2021-12-07 01:39:09,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:39:09,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-07 01:39:09,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-07 01:39:09,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-07 01:39:09,863 INFO L354 Elim1Store]: treesize reduction 8, result has 27.3 percent of original size [2021-12-07 01:39:09,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2021-12-07 01:39:09,876 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:39:09,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:39:09,917 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_259 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_259) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstpcpy_~from#1.offset| 1)) 0)) is different from false [2021-12-07 01:39:09,924 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_259 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetArea~0#1.base| v_ArrVal_259) |c_ULTIMATE.start_main_~nondetString~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString~0#1.offset| 1)) 0)) is different from false [2021-12-07 01:39:09,930 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 01:39:09,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-07 01:39:09,934 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 01:39:09,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-12-07 01:39:09,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-07 01:39:10,055 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2021-12-07 01:39:10,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665260201] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:39:10,056 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:39:10,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 28 [2021-12-07 01:39:10,056 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555213567] [2021-12-07 01:39:10,056 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:39:10,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-12-07 01:39:10,056 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:39:10,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-12-07 01:39:10,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=567, Unknown=2, NotChecked=98, Total=756 [2021-12-07 01:39:10,057 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 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) [2021-12-07 01:39:10,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:39:10,275 INFO L93 Difference]: Finished difference Result 44 states and 45 transitions. [2021-12-07 01:39:10,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-07 01:39:10,276 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 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) Word has length 25 [2021-12-07 01:39:10,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:39:10,277 INFO L225 Difference]: With dead ends: 44 [2021-12-07 01:39:10,277 INFO L226 Difference]: Without dead ends: 35 [2021-12-07 01:39:10,277 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 2 IntricatePredicates, 2 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=154, Invalid=974, Unknown=2, NotChecked=130, Total=1260 [2021-12-07 01:39:10,278 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 32 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 105 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 01:39:10,278 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 141 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 182 Invalid, 0 Unknown, 105 Unchecked, 0.1s Time] [2021-12-07 01:39:10,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-12-07 01:39:10,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2021-12-07 01:39:10,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 30 states have (on average 1.1) internal successors, (33), 31 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:39:10,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2021-12-07 01:39:10,281 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 25 [2021-12-07 01:39:10,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:39:10,281 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2021-12-07 01:39:10,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 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) [2021-12-07 01:39:10,281 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2021-12-07 01:39:10,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-07 01:39:10,282 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:39:10,282 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:39:10,315 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-07 01:39:10,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:39:10,483 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-07 01:39:10,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:39:10,483 INFO L85 PathProgramCache]: Analyzing trace with hash 1470618683, now seen corresponding path program 4 times [2021-12-07 01:39:10,483 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:39:10,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127615459] [2021-12-07 01:39:10,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:39:10,484 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:39:10,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:39:10,580 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:39:10,580 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:39:10,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127615459] [2021-12-07 01:39:10,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127615459] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:39:10,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078571154] [2021-12-07 01:39:10,580 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-07 01:39:10,580 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:39:10,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:39:10,581 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:39:10,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-07 01:39:10,632 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-07 01:39:10,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:39:10,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-07 01:39:10,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:39:10,725 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:39:10,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:39:10,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-12-07 01:39:10,839 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:39:10,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078571154] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:39:10,839 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:39:10,839 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2021-12-07 01:39:10,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354859592] [2021-12-07 01:39:10,839 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:39:10,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-07 01:39:10,840 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:39:10,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-07 01:39:10,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-12-07 01:39:10,841 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand has 21 states, 20 states have (on average 3.2) internal successors, (64), 21 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:39:10,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:39:10,951 INFO L93 Difference]: Finished difference Result 39 states and 40 transitions. [2021-12-07 01:39:10,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-07 01:39:10,951 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 3.2) internal successors, (64), 21 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-12-07 01:39:10,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:39:10,952 INFO L225 Difference]: With dead ends: 39 [2021-12-07 01:39:10,952 INFO L226 Difference]: Without dead ends: 39 [2021-12-07 01:39:10,952 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=147, Invalid=503, Unknown=0, NotChecked=0, Total=650 [2021-12-07 01:39:10,953 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 76 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 01:39:10,953 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 80 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 01:39:10,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-12-07 01:39:10,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 35. [2021-12-07 01:39:10,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 34 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:39:10,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2021-12-07 01:39:10,955 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 29 [2021-12-07 01:39:10,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:39:10,955 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2021-12-07 01:39:10,955 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 3.2) internal successors, (64), 21 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:39:10,955 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2021-12-07 01:39:10,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-07 01:39:10,956 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:39:10,956 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:39:10,980 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-12-07 01:39:11,156 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:39:11,156 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-07 01:39:11,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:39:11,157 INFO L85 PathProgramCache]: Analyzing trace with hash -1655461096, now seen corresponding path program 2 times [2021-12-07 01:39:11,157 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:39:11,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524589034] [2021-12-07 01:39:11,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:39:11,157 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:39:11,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:39:11,234 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:39:11,234 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:39:11,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524589034] [2021-12-07 01:39:11,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524589034] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:39:11,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791219131] [2021-12-07 01:39:11,234 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 01:39:11,234 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:39:11,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:39:11,235 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:39:11,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-07 01:39:11,276 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-07 01:39:11,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:39:11,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 33 conjunts are in the unsatisfiable core [2021-12-07 01:39:11,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:39:11,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:39:11,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-07 01:39:11,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-07 01:39:11,441 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:39:11,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:39:11,640 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 15 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:39:11,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1791219131] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:39:11,641 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:39:11,641 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 23 [2021-12-07 01:39:11,641 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981633044] [2021-12-07 01:39:11,641 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:39:11,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-07 01:39:11,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:39:11,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-07 01:39:11,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2021-12-07 01:39:11,643 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand has 24 states, 23 states have (on average 3.5217391304347827) internal successors, (81), 24 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) [2021-12-07 01:39:11,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:39:11,805 INFO L93 Difference]: Finished difference Result 38 states and 39 transitions. [2021-12-07 01:39:11,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-07 01:39:11,806 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 3.5217391304347827) internal successors, (81), 24 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 30 [2021-12-07 01:39:11,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:39:11,806 INFO L225 Difference]: With dead ends: 38 [2021-12-07 01:39:11,806 INFO L226 Difference]: Without dead ends: 38 [2021-12-07 01:39:11,807 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=206, Invalid=724, Unknown=0, NotChecked=0, Total=930 [2021-12-07 01:39:11,807 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 106 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 01:39:11,807 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 71 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 01:39:11,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-12-07 01:39:11,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2021-12-07 01:39:11,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 34 states have (on average 1.088235294117647) internal successors, (37), 35 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) [2021-12-07 01:39:11,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2021-12-07 01:39:11,809 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 30 [2021-12-07 01:39:11,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:39:11,809 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2021-12-07 01:39:11,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 3.5217391304347827) internal successors, (81), 24 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) [2021-12-07 01:39:11,810 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2021-12-07 01:39:11,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-07 01:39:11,810 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:39:11,810 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:39:11,830 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-12-07 01:39:12,011 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:39:12,012 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-07 01:39:12,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:39:12,013 INFO L85 PathProgramCache]: Analyzing trace with hash 1267943126, now seen corresponding path program 5 times [2021-12-07 01:39:12,014 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:39:12,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044288880] [2021-12-07 01:39:12,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:39:12,014 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:39:12,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:39:12,210 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:39:12,210 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:39:12,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044288880] [2021-12-07 01:39:12,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044288880] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:39:12,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336082268] [2021-12-07 01:39:12,211 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-07 01:39:12,211 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:39:12,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:39:12,211 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:39:12,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-07 01:39:12,260 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-12-07 01:39:12,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:39:12,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 50 conjunts are in the unsatisfiable core [2021-12-07 01:39:12,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:39:12,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-07 01:39:12,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-07 01:39:12,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-07 01:39:12,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-07 01:39:12,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-07 01:39:12,478 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:39:12,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:39:12,487 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_374 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_374) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstpcpy_~from#1.offset| 1)) 0)) is different from false [2021-12-07 01:39:12,494 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_374 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_374) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ 2 |c_ULTIMATE.start_cstpcpy_~from#1.offset|)) 0)) is different from false [2021-12-07 01:39:12,504 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_374 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetArea~0#1.base| v_ArrVal_374) |c_ULTIMATE.start_main_~nondetString~0#1.base|) (+ 2 |c_ULTIMATE.start_main_~nondetString~0#1.offset|)) 0)) is different from false [2021-12-07 01:39:12,510 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 01:39:12,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-07 01:39:12,513 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 01:39:12,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-12-07 01:39:12,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-07 01:39:12,618 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 9 not checked. [2021-12-07 01:39:12,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1336082268] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:39:12,618 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:39:12,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 27 [2021-12-07 01:39:12,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078316737] [2021-12-07 01:39:12,618 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:39:12,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-07 01:39:12,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:39:12,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-07 01:39:12,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=487, Unknown=3, NotChecked=138, Total=702 [2021-12-07 01:39:12,619 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:39:12,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:39:12,863 INFO L93 Difference]: Finished difference Result 56 states and 57 transitions. [2021-12-07 01:39:12,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-07 01:39:12,863 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 27 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 33 [2021-12-07 01:39:12,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:39:12,863 INFO L225 Difference]: With dead ends: 56 [2021-12-07 01:39:12,864 INFO L226 Difference]: Without dead ends: 43 [2021-12-07 01:39:12,864 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 51 SyntacticMatches, 5 SemanticMatches, 34 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=150, Invalid=915, Unknown=3, NotChecked=192, Total=1260 [2021-12-07 01:39:12,864 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 41 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 120 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 01:39:12,865 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 166 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 266 Invalid, 0 Unknown, 120 Unchecked, 0.1s Time] [2021-12-07 01:39:12,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-12-07 01:39:12,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2021-12-07 01:39:12,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 38 states have (on average 1.0789473684210527) internal successors, (41), 39 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) [2021-12-07 01:39:12,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2021-12-07 01:39:12,867 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 33 [2021-12-07 01:39:12,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:39:12,867 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2021-12-07 01:39:12,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:39:12,867 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2021-12-07 01:39:12,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-07 01:39:12,868 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:39:12,868 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:39:12,887 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-12-07 01:39:13,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-12-07 01:39:13,069 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-07 01:39:13,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:39:13,070 INFO L85 PathProgramCache]: Analyzing trace with hash -333254055, now seen corresponding path program 6 times [2021-12-07 01:39:13,070 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:39:13,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713381638] [2021-12-07 01:39:13,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:39:13,071 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:39:13,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:39:13,201 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:39:13,201 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:39:13,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713381638] [2021-12-07 01:39:13,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713381638] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:39:13,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246738253] [2021-12-07 01:39:13,202 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-07 01:39:13,202 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:39:13,202 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:39:13,202 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:39:13,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-07 01:39:13,260 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-12-07 01:39:13,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:39:13,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-07 01:39:13,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:39:13,383 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 18 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:39:13,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:39:13,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-12-07 01:39:13,581 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 18 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:39:13,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246738253] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:39:13,581 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:39:13,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2021-12-07 01:39:13,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7035662] [2021-12-07 01:39:13,581 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:39:13,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-07 01:39:13,582 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:39:13,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-07 01:39:13,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2021-12-07 01:39:13,583 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand has 27 states, 26 states have (on average 3.6153846153846154) internal successors, (94), 27 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:39:13,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:39:13,727 INFO L93 Difference]: Finished difference Result 47 states and 48 transitions. [2021-12-07 01:39:13,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-07 01:39:13,728 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 3.6153846153846154) internal successors, (94), 27 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-12-07 01:39:13,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:39:13,728 INFO L225 Difference]: With dead ends: 47 [2021-12-07 01:39:13,728 INFO L226 Difference]: Without dead ends: 47 [2021-12-07 01:39:13,729 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=244, Invalid=812, Unknown=0, NotChecked=0, Total=1056 [2021-12-07 01:39:13,729 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 126 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 01:39:13,730 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 128 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 01:39:13,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-12-07 01:39:13,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 43. [2021-12-07 01:39:13,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 41 states have (on average 1.0731707317073171) internal successors, (44), 42 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:39:13,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2021-12-07 01:39:13,732 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 37 [2021-12-07 01:39:13,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:39:13,732 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2021-12-07 01:39:13,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 3.6153846153846154) internal successors, (94), 27 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:39:13,732 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2021-12-07 01:39:13,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-07 01:39:13,733 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:39:13,733 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:39:13,752 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-12-07 01:39:13,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-12-07 01:39:13,934 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-07 01:39:13,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:39:13,935 INFO L85 PathProgramCache]: Analyzing trace with hash -1740941126, now seen corresponding path program 3 times [2021-12-07 01:39:13,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:39:13,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443237614] [2021-12-07 01:39:13,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:39:13,936 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:39:13,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:39:14,059 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:39:14,060 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:39:14,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443237614] [2021-12-07 01:39:14,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443237614] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:39:14,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594743443] [2021-12-07 01:39:14,060 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-07 01:39:14,060 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:39:14,060 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:39:14,061 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:39:14,062 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-07 01:39:14,127 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-07 01:39:14,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:39:14,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 50 conjunts are in the unsatisfiable core [2021-12-07 01:39:14,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:39:14,150 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 01:39:14,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-07 01:39:14,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-07 01:39:14,425 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-07 01:39:14,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:39:14,671 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-07 01:39:14,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594743443] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:39:14,672 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:39:14,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 24 [2021-12-07 01:39:14,672 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226247068] [2021-12-07 01:39:14,672 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:39:14,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-07 01:39:14,672 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:39:14,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-07 01:39:14,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2021-12-07 01:39:14,673 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand has 25 states, 24 states have (on average 3.4166666666666665) internal successors, (82), 25 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:39:15,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:39:15,171 INFO L93 Difference]: Finished difference Result 59 states and 60 transitions. [2021-12-07 01:39:15,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-07 01:39:15,171 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 3.4166666666666665) internal successors, (82), 25 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-12-07 01:39:15,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:39:15,172 INFO L225 Difference]: With dead ends: 59 [2021-12-07 01:39:15,172 INFO L226 Difference]: Without dead ends: 59 [2021-12-07 01:39:15,172 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=310, Invalid=1250, Unknown=0, NotChecked=0, Total=1560 [2021-12-07 01:39:15,173 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 93 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 12 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 01:39:15,173 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 108 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 274 Invalid, 0 Unknown, 12 Unchecked, 0.1s Time] [2021-12-07 01:39:15,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-12-07 01:39:15,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 56. [2021-12-07 01:39:15,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 54 states have (on average 1.1111111111111112) internal successors, (60), 55 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:39:15,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2021-12-07 01:39:15,175 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 38 [2021-12-07 01:39:15,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:39:15,175 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2021-12-07 01:39:15,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 3.4166666666666665) internal successors, (82), 25 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:39:15,175 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2021-12-07 01:39:15,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-07 01:39:15,176 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:39:15,176 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:39:15,195 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-12-07 01:39:15,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:39:15,378 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-07 01:39:15,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:39:15,379 INFO L85 PathProgramCache]: Analyzing trace with hash 1647975924, now seen corresponding path program 7 times [2021-12-07 01:39:15,379 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:39:15,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250741551] [2021-12-07 01:39:15,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:39:15,380 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:39:15,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:39:15,581 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 7 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:39:15,581 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:39:15,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250741551] [2021-12-07 01:39:15,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250741551] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:39:15,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915079765] [2021-12-07 01:39:15,582 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-07 01:39:15,582 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:39:15,582 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:39:15,582 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:39:15,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-07 01:39:15,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:39:15,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 59 conjunts are in the unsatisfiable core [2021-12-07 01:39:15,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:39:15,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-07 01:39:15,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-07 01:39:15,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-07 01:39:15,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-07 01:39:15,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-07 01:39:15,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-07 01:39:15,888 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 7 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:39:15,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:39:15,897 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_514 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_514) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstpcpy_~from#1.offset| 1)) 0)) is different from false [2021-12-07 01:39:15,902 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_514 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_514) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ 2 |c_ULTIMATE.start_cstpcpy_~from#1.offset|)) 0)) is different from false [2021-12-07 01:39:15,909 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_514 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_514) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ 3 |c_ULTIMATE.start_cstpcpy_~from#1.offset|)) 0)) is different from false [2021-12-07 01:39:15,917 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_514 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetArea~0#1.base| v_ArrVal_514) |c_ULTIMATE.start_main_~nondetString~0#1.base|) (+ 3 |c_ULTIMATE.start_main_~nondetString~0#1.offset|)) 0)) is different from false [2021-12-07 01:39:15,921 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 01:39:15,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-07 01:39:15,924 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 01:39:15,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-12-07 01:39:15,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-07 01:39:16,040 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 7 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 20 not checked. [2021-12-07 01:39:16,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915079765] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:39:16,040 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:39:16,040 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16] total 31 [2021-12-07 01:39:16,040 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983727774] [2021-12-07 01:39:16,040 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:39:16,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-12-07 01:39:16,041 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:39:16,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-12-07 01:39:16,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=631, Unknown=4, NotChecked=212, Total=930 [2021-12-07 01:39:16,042 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand has 31 states, 31 states have (on average 2.7419354838709675) internal successors, (85), 31 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) [2021-12-07 01:39:16,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:39:16,327 INFO L93 Difference]: Finished difference Result 80 states and 84 transitions. [2021-12-07 01:39:16,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-07 01:39:16,328 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.7419354838709675) internal successors, (85), 31 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 41 [2021-12-07 01:39:16,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:39:16,329 INFO L225 Difference]: With dead ends: 80 [2021-12-07 01:39:16,329 INFO L226 Difference]: Without dead ends: 63 [2021-12-07 01:39:16,330 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 38 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=149, Invalid=1123, Unknown=4, NotChecked=284, Total=1560 [2021-12-07 01:39:16,330 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 45 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 442 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 657 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 201 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 01:39:16,331 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 239 Invalid, 657 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 442 Invalid, 0 Unknown, 201 Unchecked, 0.1s Time] [2021-12-07 01:39:16,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-12-07 01:39:16,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 60. [2021-12-07 01:39:16,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 58 states have (on average 1.103448275862069) internal successors, (64), 59 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:39:16,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 64 transitions. [2021-12-07 01:39:16,334 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 64 transitions. Word has length 41 [2021-12-07 01:39:16,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:39:16,334 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 64 transitions. [2021-12-07 01:39:16,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.7419354838709675) internal successors, (85), 31 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) [2021-12-07 01:39:16,335 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 64 transitions. [2021-12-07 01:39:16,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-07 01:39:16,336 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:39:16,336 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:39:16,355 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-12-07 01:39:16,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:39:16,537 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-07 01:39:16,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:39:16,538 INFO L85 PathProgramCache]: Analyzing trace with hash -1728866697, now seen corresponding path program 8 times [2021-12-07 01:39:16,539 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:39:16,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721717351] [2021-12-07 01:39:16,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:39:16,540 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:39:16,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:39:16,704 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 15 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:39:16,705 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:39:16,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721717351] [2021-12-07 01:39:16,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721717351] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:39:16,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125770568] [2021-12-07 01:39:16,705 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 01:39:16,705 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:39:16,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:39:16,706 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:39:16,706 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-07 01:39:16,759 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-07 01:39:16,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:39:16,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 33 conjunts are in the unsatisfiable core [2021-12-07 01:39:16,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:39:16,890 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 28 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:39:16,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:39:17,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-07 01:39:17,035 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 28 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:39:17,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125770568] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:39:17,035 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:39:17,035 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 29 [2021-12-07 01:39:17,035 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93177717] [2021-12-07 01:39:17,035 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:39:17,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-07 01:39:17,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:39:17,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-07 01:39:17,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=747, Unknown=0, NotChecked=0, Total=870 [2021-12-07 01:39:17,036 INFO L87 Difference]: Start difference. First operand 60 states and 64 transitions. Second operand has 30 states, 29 states have (on average 3.1724137931034484) internal successors, (92), 30 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:39:17,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:39:17,265 INFO L93 Difference]: Finished difference Result 60 states and 63 transitions. [2021-12-07 01:39:17,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-07 01:39:17,265 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 3.1724137931034484) internal successors, (92), 30 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-12-07 01:39:17,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:39:17,266 INFO L225 Difference]: With dead ends: 60 [2021-12-07 01:39:17,266 INFO L226 Difference]: Without dead ends: 60 [2021-12-07 01:39:17,266 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 71 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=270, Invalid=1062, Unknown=0, NotChecked=0, Total=1332 [2021-12-07 01:39:17,267 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 141 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 479 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-07 01:39:17,267 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 192 Invalid, 522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 479 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-07 01:39:17,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-12-07 01:39:17,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-12-07 01:39:17,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 58 states have (on average 1.0862068965517242) 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) [2021-12-07 01:39:17,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 63 transitions. [2021-12-07 01:39:17,268 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 63 transitions. Word has length 45 [2021-12-07 01:39:17,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:39:17,268 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 63 transitions. [2021-12-07 01:39:17,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 3.1724137931034484) internal successors, (92), 30 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:39:17,269 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 63 transitions. [2021-12-07 01:39:17,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-07 01:39:17,269 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:39:17,269 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:39:17,288 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-12-07 01:39:17,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-12-07 01:39:17,470 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-07 01:39:17,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:39:17,471 INFO L85 PathProgramCache]: Analyzing trace with hash 801080082, now seen corresponding path program 9 times [2021-12-07 01:39:17,471 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:39:17,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531305140] [2021-12-07 01:39:17,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:39:17,472 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:39:17,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:39:17,744 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 9 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:39:17,745 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:39:17,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531305140] [2021-12-07 01:39:17,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531305140] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:39:17,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643014282] [2021-12-07 01:39:17,745 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-07 01:39:17,745 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:39:17,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:39:17,746 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:39:17,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-07 01:39:17,830 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-12-07 01:39:17,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:39:17,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 88 conjunts are in the unsatisfiable core [2021-12-07 01:39:17,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:39:17,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-07 01:39:18,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-07 01:39:18,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-07 01:39:18,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-07 01:39:18,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-07 01:39:18,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-07 01:39:18,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:39:18,404 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 01:39:18,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2021-12-07 01:39:18,408 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 9 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:39:18,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:39:18,432 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_625 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_625) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstpcpy_~from#1.offset| 1)) 0)) is different from false [2021-12-07 01:39:18,438 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_625 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_625) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ 2 |c_ULTIMATE.start_cstpcpy_~from#1.offset|)) 0)) is different from false [2021-12-07 01:39:18,447 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_625 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_625) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ 3 |c_ULTIMATE.start_cstpcpy_~from#1.offset|)) 0)) is different from false [2021-12-07 01:39:18,455 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_625 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_625) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstpcpy_~from#1.offset| 4)) 0)) is different from false [2021-12-07 01:39:18,464 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_625 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetArea~0#1.base| v_ArrVal_625) |c_ULTIMATE.start_main_~nondetString~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString~0#1.offset| 4)) 0)) is different from false [2021-12-07 01:39:18,468 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 01:39:18,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-07 01:39:18,471 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 01:39:18,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-12-07 01:39:18,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-07 01:39:18,708 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 9 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 35 not checked. [2021-12-07 01:39:18,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643014282] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:39:18,708 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:39:18,708 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 46 [2021-12-07 01:39:18,708 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742301633] [2021-12-07 01:39:18,708 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:39:18,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-12-07 01:39:18,709 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:39:18,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-12-07 01:39:18,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1513, Unknown=5, NotChecked=410, Total=2070 [2021-12-07 01:39:18,710 INFO L87 Difference]: Start difference. First operand 60 states and 63 transitions. Second operand has 46 states, 46 states have (on average 2.8260869565217392) internal successors, (130), 46 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) [2021-12-07 01:39:19,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:39:19,021 INFO L93 Difference]: Finished difference Result 88 states and 91 transitions. [2021-12-07 01:39:19,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-07 01:39:19,022 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.8260869565217392) internal successors, (130), 46 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) Word has length 49 [2021-12-07 01:39:19,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:39:19,022 INFO L225 Difference]: With dead ends: 88 [2021-12-07 01:39:19,022 INFO L226 Difference]: Without dead ends: 67 [2021-12-07 01:39:19,023 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 73 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 5 IntricatePredicates, 2 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=203, Invalid=2164, Unknown=5, NotChecked=490, Total=2862 [2021-12-07 01:39:19,023 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 30 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 350 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 251 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 01:39:19,023 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 326 Invalid, 613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 350 Invalid, 0 Unknown, 251 Unchecked, 0.1s Time] [2021-12-07 01:39:19,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-12-07 01:39:19,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 64. [2021-12-07 01:39:19,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 62 states have (on average 1.0806451612903225) internal successors, (67), 63 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) [2021-12-07 01:39:19,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 67 transitions. [2021-12-07 01:39:19,025 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 67 transitions. Word has length 49 [2021-12-07 01:39:19,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:39:19,025 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 67 transitions. [2021-12-07 01:39:19,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.8260869565217392) internal successors, (130), 46 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) [2021-12-07 01:39:19,025 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 67 transitions. [2021-12-07 01:39:19,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-07 01:39:19,026 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:39:19,026 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:39:19,045 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2021-12-07 01:39:19,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-12-07 01:39:19,227 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-07 01:39:19,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:39:19,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1870280555, now seen corresponding path program 10 times [2021-12-07 01:39:19,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:39:19,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380215462] [2021-12-07 01:39:19,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:39:19,229 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:39:19,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:39:19,398 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 28 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:39:19,398 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:39:19,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380215462] [2021-12-07 01:39:19,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380215462] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:39:19,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455086908] [2021-12-07 01:39:19,399 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-07 01:39:19,399 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:39:19,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:39:19,399 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:39:19,400 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-07 01:39:19,463 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-07 01:39:19,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:39:19,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 37 conjunts are in the unsatisfiable core [2021-12-07 01:39:19,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:39:19,620 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 50 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:39:19,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:39:19,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-12-07 01:39:19,792 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 50 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:39:19,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455086908] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:39:19,792 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:39:19,792 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 32 [2021-12-07 01:39:19,792 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846099532] [2021-12-07 01:39:19,792 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:39:19,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-07 01:39:19,792 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:39:19,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-07 01:39:19,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=906, Unknown=0, NotChecked=0, Total=1056 [2021-12-07 01:39:19,793 INFO L87 Difference]: Start difference. First operand 64 states and 67 transitions. Second operand has 33 states, 32 states have (on average 3.5) internal successors, (112), 33 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) [2021-12-07 01:39:20,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:39:20,020 INFO L93 Difference]: Finished difference Result 64 states and 66 transitions. [2021-12-07 01:39:20,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-07 01:39:20,020 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 3.5) internal successors, (112), 33 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) Word has length 53 [2021-12-07 01:39:20,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:39:20,021 INFO L225 Difference]: With dead ends: 64 [2021-12-07 01:39:20,021 INFO L226 Difference]: Without dead ends: 64 [2021-12-07 01:39:20,022 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=330, Invalid=1310, Unknown=0, NotChecked=0, Total=1640 [2021-12-07 01:39:20,022 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 158 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 495 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 01:39:20,022 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 194 Invalid, 539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 495 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 01:39:20,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-12-07 01:39:20,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-12-07 01:39:20,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 62 states have (on average 1.064516129032258) internal successors, (66), 63 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:39:20,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2021-12-07 01:39:20,023 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 53 [2021-12-07 01:39:20,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:39:20,024 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2021-12-07 01:39:20,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 3.5) internal successors, (112), 33 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) [2021-12-07 01:39:20,024 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2021-12-07 01:39:20,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-07 01:39:20,024 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:39:20,024 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:39:20,043 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-12-07 01:39:20,225 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-12-07 01:39:20,226 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-07 01:39:20,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:39:20,227 INFO L85 PathProgramCache]: Analyzing trace with hash -795904464, now seen corresponding path program 11 times [2021-12-07 01:39:20,227 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:39:20,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182264027] [2021-12-07 01:39:20,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:39:20,228 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:39:20,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:39:20,528 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 11 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:39:20,528 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:39:20,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182264027] [2021-12-07 01:39:20,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182264027] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:39:20,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483612931] [2021-12-07 01:39:20,528 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-07 01:39:20,528 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:39:20,529 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:39:20,529 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:39:20,530 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-07 01:39:20,716 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-12-07 01:39:20,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:39:20,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 77 conjunts are in the unsatisfiable core [2021-12-07 01:39:20,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:39:20,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-07 01:39:20,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-07 01:39:20,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-07 01:39:20,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-07 01:39:21,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-07 01:39:21,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-07 01:39:21,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-07 01:39:21,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-07 01:39:21,050 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 11 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:39:21,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:39:21,058 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_755 (Array Int Int))) (= 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_755) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstpcpy_~from#1.offset| 1)))) is different from false [2021-12-07 01:39:21,063 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_755 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_755) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ 2 |c_ULTIMATE.start_cstpcpy_~from#1.offset|)) 0)) is different from false [2021-12-07 01:39:21,070 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_755 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_755) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ 3 |c_ULTIMATE.start_cstpcpy_~from#1.offset|)) 0)) is different from false [2021-12-07 01:39:21,077 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_755 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_755) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstpcpy_~from#1.offset| 4)) 0)) is different from false [2021-12-07 01:39:21,085 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_755 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_755) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ 5 |c_ULTIMATE.start_cstpcpy_~from#1.offset|)) 0)) is different from false [2021-12-07 01:39:21,094 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_755 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetArea~0#1.base| v_ArrVal_755) |c_ULTIMATE.start_main_~nondetString~0#1.base|) (+ 5 |c_ULTIMATE.start_main_~nondetString~0#1.offset|)) 0)) is different from false [2021-12-07 01:39:21,097 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 01:39:21,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-07 01:39:21,101 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 01:39:21,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-12-07 01:39:21,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-07 01:39:21,238 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 11 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 54 not checked. [2021-12-07 01:39:21,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483612931] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:39:21,238 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:39:21,238 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20, 20] total 39 [2021-12-07 01:39:21,239 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390583486] [2021-12-07 01:39:21,239 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:39:21,239 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-12-07 01:39:21,239 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:39:21,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-12-07 01:39:21,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=972, Unknown=6, NotChecked=402, Total=1482 [2021-12-07 01:39:21,240 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand has 39 states, 39 states have (on average 3.0) internal successors, (117), 39 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) [2021-12-07 01:39:21,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:39:21,742 INFO L93 Difference]: Finished difference Result 96 states and 98 transitions. [2021-12-07 01:39:21,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-07 01:39:21,743 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.0) internal successors, (117), 39 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 57 [2021-12-07 01:39:21,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:39:21,743 INFO L225 Difference]: With dead ends: 96 [2021-12-07 01:39:21,743 INFO L226 Difference]: Without dead ends: 71 [2021-12-07 01:39:21,744 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 96 SyntacticMatches, 8 SemanticMatches, 48 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=181, Invalid=1729, Unknown=6, NotChecked=534, Total=2450 [2021-12-07 01:39:21,744 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 37 mSDsluCounter, 442 mSDsCounter, 0 mSdLazyCounter, 978 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 460 SdHoareTripleChecker+Invalid, 1347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 978 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 357 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-07 01:39:21,744 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 460 Invalid, 1347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 978 Invalid, 0 Unknown, 357 Unchecked, 0.3s Time] [2021-12-07 01:39:21,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-12-07 01:39:21,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 68. [2021-12-07 01:39:21,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 66 states have (on average 1.0606060606060606) internal successors, (70), 67 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) [2021-12-07 01:39:21,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 70 transitions. [2021-12-07 01:39:21,746 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 70 transitions. Word has length 57 [2021-12-07 01:39:21,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:39:21,746 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 70 transitions. [2021-12-07 01:39:21,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.0) internal successors, (117), 39 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) [2021-12-07 01:39:21,746 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 70 transitions. [2021-12-07 01:39:21,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-07 01:39:21,747 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:39:21,747 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:39:21,766 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2021-12-07 01:39:21,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:39:21,948 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-07 01:39:21,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:39:21,949 INFO L85 PathProgramCache]: Analyzing trace with hash 1548060851, now seen corresponding path program 12 times [2021-12-07 01:39:21,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:39:21,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722966566] [2021-12-07 01:39:21,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:39:21,950 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:39:21,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:39:22,133 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 45 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:39:22,134 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:39:22,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722966566] [2021-12-07 01:39:22,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722966566] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:39:22,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075688192] [2021-12-07 01:39:22,134 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-07 01:39:22,134 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:39:22,134 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:39:22,135 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:39:22,135 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-07 01:39:22,354 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-12-07 01:39:22,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:39:22,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-07 01:39:22,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:39:22,558 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 66 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:39:22,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:39:22,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-12-07 01:39:22,782 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 66 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:39:22,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075688192] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:39:22,782 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:39:22,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 43 [2021-12-07 01:39:22,783 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307620288] [2021-12-07 01:39:22,783 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:39:22,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-12-07 01:39:22,783 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:39:22,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-12-07 01:39:22,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=1611, Unknown=0, NotChecked=0, Total=1892 [2021-12-07 01:39:22,784 INFO L87 Difference]: Start difference. First operand 68 states and 70 transitions. Second operand has 44 states, 43 states have (on average 3.372093023255814) internal successors, (145), 44 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) [2021-12-07 01:39:23,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:39:23,063 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2021-12-07 01:39:23,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-07 01:39:23,063 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 3.372093023255814) internal successors, (145), 44 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 61 [2021-12-07 01:39:23,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:39:23,063 INFO L225 Difference]: With dead ends: 70 [2021-12-07 01:39:23,063 INFO L226 Difference]: Without dead ends: 70 [2021-12-07 01:39:23,064 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 94 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 735 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=551, Invalid=2205, Unknown=0, NotChecked=0, Total=2756 [2021-12-07 01:39:23,065 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 364 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 666 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 364 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 765 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 666 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-07 01:39:23,065 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [364 Valid, 250 Invalid, 765 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 666 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-07 01:39:23,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-12-07 01:39:23,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 68. [2021-12-07 01:39:23,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 66 states have (on average 1.0454545454545454) internal successors, (69), 67 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:39:23,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 69 transitions. [2021-12-07 01:39:23,066 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 69 transitions. Word has length 61 [2021-12-07 01:39:23,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:39:23,066 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 69 transitions. [2021-12-07 01:39:23,067 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 3.372093023255814) internal successors, (145), 44 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) [2021-12-07 01:39:23,067 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 69 transitions. [2021-12-07 01:39:23,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-07 01:39:23,067 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:39:23,067 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:39:23,086 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-12-07 01:39:23,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:39:23,268 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-07 01:39:23,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:39:23,269 INFO L85 PathProgramCache]: Analyzing trace with hash 940963662, now seen corresponding path program 13 times [2021-12-07 01:39:23,269 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:39:23,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249094877] [2021-12-07 01:39:23,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:39:23,270 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:39:23,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:39:23,577 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 13 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:39:23,578 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:39:23,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249094877] [2021-12-07 01:39:23,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249094877] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:39:23,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603776874] [2021-12-07 01:39:23,578 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-07 01:39:23,578 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:39:23,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:39:23,579 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:39:23,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-07 01:39:23,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:39:23,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 84 conjunts are in the unsatisfiable core [2021-12-07 01:39:23,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:39:23,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-07 01:39:23,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-07 01:39:23,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-07 01:39:23,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-07 01:39:23,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-07 01:39:23,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-07 01:39:23,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-07 01:39:23,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-07 01:39:24,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-07 01:39:24,016 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 13 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:39:24,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:39:24,025 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_900 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_900) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstpcpy_~from#1.offset| 1)) 0)) is different from false [2021-12-07 01:39:24,029 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_900 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_900) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ 2 |c_ULTIMATE.start_cstpcpy_~from#1.offset|)) 0)) is different from false [2021-12-07 01:39:24,037 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_900 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_900) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ 3 |c_ULTIMATE.start_cstpcpy_~from#1.offset|)) 0)) is different from false [2021-12-07 01:39:24,044 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_900 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_900) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstpcpy_~from#1.offset| 4)) 0)) is different from false [2021-12-07 01:39:24,051 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_900 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_900) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ 5 |c_ULTIMATE.start_cstpcpy_~from#1.offset|)) 0)) is different from false [2021-12-07 01:39:24,059 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_900 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_900) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ 6 |c_ULTIMATE.start_cstpcpy_~from#1.offset|)) 0)) is different from false [2021-12-07 01:39:24,066 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_900 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetArea~0#1.base| v_ArrVal_900) |c_ULTIMATE.start_main_~nondetString~0#1.base|) (+ 6 |c_ULTIMATE.start_main_~nondetString~0#1.offset|)) 0)) is different from false [2021-12-07 01:39:24,069 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 01:39:24,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-07 01:39:24,073 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 01:39:24,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-12-07 01:39:24,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-07 01:39:24,231 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 13 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 77 not checked. [2021-12-07 01:39:24,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603776874] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:39:24,231 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:39:24,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22, 22] total 43 [2021-12-07 01:39:24,231 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27817594] [2021-12-07 01:39:24,231 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:39:24,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-12-07 01:39:24,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:39:24,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-12-07 01:39:24,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1171, Unknown=7, NotChecked=518, Total=1806 [2021-12-07 01:39:24,232 INFO L87 Difference]: Start difference. First operand 68 states and 69 transitions. Second operand has 43 states, 43 states have (on average 3.0930232558139537) internal successors, (133), 43 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:39:24,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:39:24,836 INFO L93 Difference]: Finished difference Result 104 states and 105 transitions. [2021-12-07 01:39:24,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-07 01:39:24,837 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 3.0930232558139537) internal successors, (133), 43 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 65 [2021-12-07 01:39:24,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:39:24,837 INFO L225 Difference]: With dead ends: 104 [2021-12-07 01:39:24,837 INFO L226 Difference]: Without dead ends: 75 [2021-12-07 01:39:24,838 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 111 SyntacticMatches, 8 SemanticMatches, 56 ConstructedPredicates, 7 IntricatePredicates, 0 DeprecatedPredicates, 415 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=236, Invalid=2335, Unknown=7, NotChecked=728, Total=3306 [2021-12-07 01:39:24,838 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 76 mSDsluCounter, 454 mSDsCounter, 0 mSdLazyCounter, 1024 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 474 SdHoareTripleChecker+Invalid, 1544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1024 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 490 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-07 01:39:24,839 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 474 Invalid, 1544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1024 Invalid, 0 Unknown, 490 Unchecked, 0.3s Time] [2021-12-07 01:39:24,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-12-07 01:39:24,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 72. [2021-12-07 01:39:24,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 70 states have (on average 1.042857142857143) internal successors, (73), 71 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) [2021-12-07 01:39:24,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2021-12-07 01:39:24,840 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 65 [2021-12-07 01:39:24,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:39:24,840 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2021-12-07 01:39:24,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 3.0930232558139537) internal successors, (133), 43 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:39:24,841 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2021-12-07 01:39:24,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-07 01:39:24,841 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:39:24,841 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:39:24,860 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2021-12-07 01:39:25,042 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-12-07 01:39:25,042 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-07 01:39:25,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:39:25,043 INFO L85 PathProgramCache]: Analyzing trace with hash 1553913553, now seen corresponding path program 14 times [2021-12-07 01:39:25,043 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:39:25,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611892640] [2021-12-07 01:39:25,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:39:25,044 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:39:25,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:39:25,227 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 66 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:39:25,227 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:39:25,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611892640] [2021-12-07 01:39:25,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611892640] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:39:25,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152817621] [2021-12-07 01:39:25,228 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 01:39:25,228 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:39:25,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:39:25,229 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:39:25,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-12-07 01:39:25,308 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-07 01:39:25,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:39:25,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 48 conjunts are in the unsatisfiable core [2021-12-07 01:39:25,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:39:25,546 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 91 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:39:25,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:39:25,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-07 01:39:25,834 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 91 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:39:25,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152817621] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:39:25,834 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:39:25,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 20, 20] total 40 [2021-12-07 01:39:25,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047451134] [2021-12-07 01:39:25,835 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:39:25,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-12-07 01:39:25,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:39:25,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-12-07 01:39:25,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=1456, Unknown=0, NotChecked=0, Total=1640 [2021-12-07 01:39:25,836 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand has 41 states, 40 states have (on average 3.5) internal successors, (140), 41 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:39:26,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:39:26,295 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2021-12-07 01:39:26,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-07 01:39:26,295 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 3.5) internal successors, (140), 41 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-12-07 01:39:26,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:39:26,296 INFO L225 Difference]: With dead ends: 79 [2021-12-07 01:39:26,296 INFO L226 Difference]: Without dead ends: 79 [2021-12-07 01:39:26,297 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 113 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=627, Invalid=2679, Unknown=0, NotChecked=0, Total=3306 [2021-12-07 01:39:26,297 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 333 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 821 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 333 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 912 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 821 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-07 01:39:26,297 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [333 Valid, 310 Invalid, 912 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 821 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-07 01:39:26,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-12-07 01:39:26,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 75. [2021-12-07 01:39:26,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 73 states have (on average 1.0410958904109588) internal successors, (76), 74 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:39:26,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2021-12-07 01:39:26,299 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 69 [2021-12-07 01:39:26,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:39:26,299 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2021-12-07 01:39:26,299 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 3.5) internal successors, (140), 41 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:39:26,299 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2021-12-07 01:39:26,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-12-07 01:39:26,300 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:39:26,300 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:39:26,319 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-12-07 01:39:26,500 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-12-07 01:39:26,501 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-07 01:39:26,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:39:26,502 INFO L85 PathProgramCache]: Analyzing trace with hash 926679874, now seen corresponding path program 4 times [2021-12-07 01:39:26,502 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:39:26,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579639701] [2021-12-07 01:39:26,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:39:26,504 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:39:26,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:39:26,732 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 66 proven. 152 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:39:26,732 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:39:26,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579639701] [2021-12-07 01:39:26,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579639701] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:39:26,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401174054] [2021-12-07 01:39:26,733 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-07 01:39:26,733 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:39:26,733 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:39:26,733 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:39:26,734 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-12-07 01:39:26,811 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-07 01:39:26,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:39:26,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 61 conjunts are in the unsatisfiable core [2021-12-07 01:39:26,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:39:26,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-07 01:39:26,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-07 01:39:27,632 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 98 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:39:27,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:39:28,232 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 120 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:39:28,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401174054] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:39:28,232 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:39:28,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19, 19] total 54 [2021-12-07 01:39:28,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59723279] [2021-12-07 01:39:28,232 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:39:28,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-12-07 01:39:28,233 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:39:28,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-12-07 01:39:28,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=331, Invalid=2639, Unknown=0, NotChecked=0, Total=2970 [2021-12-07 01:39:28,234 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand has 55 states, 54 states have (on average 3.740740740740741) internal successors, (202), 55 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) [2021-12-07 01:39:28,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:39:28,638 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2021-12-07 01:39:28,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-07 01:39:28,639 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 54 states have (on average 3.740740740740741) internal successors, (202), 55 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) Word has length 70 [2021-12-07 01:39:28,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:39:28,639 INFO L225 Difference]: With dead ends: 76 [2021-12-07 01:39:28,639 INFO L226 Difference]: Without dead ends: 76 [2021-12-07 01:39:28,640 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 103 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1043 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=553, Invalid=3737, Unknown=0, NotChecked=0, Total=4290 [2021-12-07 01:39:28,641 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 15 mSDsluCounter, 400 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 125 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 01:39:28,641 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 422 Invalid, 528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 397 Invalid, 0 Unknown, 125 Unchecked, 0.1s Time] [2021-12-07 01:39:28,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-12-07 01:39:28,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2021-12-07 01:39:28,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 74 states have (on average 1.0405405405405406) internal successors, (77), 75 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) [2021-12-07 01:39:28,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 77 transitions. [2021-12-07 01:39:28,642 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 77 transitions. Word has length 70 [2021-12-07 01:39:28,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:39:28,643 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 77 transitions. [2021-12-07 01:39:28,643 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 54 states have (on average 3.740740740740741) internal successors, (202), 55 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) [2021-12-07 01:39:28,643 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 77 transitions. [2021-12-07 01:39:28,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-07 01:39:28,643 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:39:28,643 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:39:28,662 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2021-12-07 01:39:28,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:39:28,845 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-07 01:39:28,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:39:28,846 INFO L85 PathProgramCache]: Analyzing trace with hash -1329658260, now seen corresponding path program 15 times [2021-12-07 01:39:28,846 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:39:28,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226736982] [2021-12-07 01:39:28,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:39:28,847 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:39:28,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:39:29,195 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 15 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:39:29,195 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:39:29,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226736982] [2021-12-07 01:39:29,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226736982] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:39:29,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005452005] [2021-12-07 01:39:29,195 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-07 01:39:29,195 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:39:29,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:39:29,196 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:39:29,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-12-07 01:39:29,537 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-12-07 01:39:29,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:39:29,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 97 conjunts are in the unsatisfiable core [2021-12-07 01:39:29,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:39:29,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-07 01:39:29,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-07 01:39:29,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-07 01:39:29,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-07 01:39:29,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-07 01:39:29,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-07 01:39:29,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-07 01:39:29,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-07 01:39:29,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-07 01:39:29,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-07 01:39:29,957 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 15 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:39:29,957 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:39:29,981 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1139 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_1139) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstpcpy_~from#1.offset| 1)) 0)) is different from false [2021-12-07 01:39:29,985 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1139 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_1139) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ 2 |c_ULTIMATE.start_cstpcpy_~from#1.offset|)) 0)) is different from false [2021-12-07 01:39:29,993 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1139 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_1139) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ 3 |c_ULTIMATE.start_cstpcpy_~from#1.offset|)) 0)) is different from false [2021-12-07 01:39:30,000 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1139 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_1139) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstpcpy_~from#1.offset| 4)) 0)) is different from false [2021-12-07 01:39:30,008 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1139 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_1139) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ 5 |c_ULTIMATE.start_cstpcpy_~from#1.offset|)) 0)) is different from false [2021-12-07 01:39:30,015 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1139 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_1139) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ 6 |c_ULTIMATE.start_cstpcpy_~from#1.offset|)) 0)) is different from false [2021-12-07 01:39:30,022 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1139 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_1139) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ 7 |c_ULTIMATE.start_cstpcpy_~from#1.offset|)) 0)) is different from false [2021-12-07 01:39:30,029 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1139 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetArea~0#1.base| v_ArrVal_1139) |c_ULTIMATE.start_main_~nondetString~0#1.base|) (+ 7 |c_ULTIMATE.start_main_~nondetString~0#1.offset|)) 0)) is different from false [2021-12-07 01:39:30,033 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 01:39:30,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-07 01:39:30,036 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 01:39:30,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-12-07 01:39:30,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-07 01:39:30,223 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 15 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 104 not checked. [2021-12-07 01:39:30,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005452005] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:39:30,224 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:39:30,224 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 24] total 47 [2021-12-07 01:39:30,224 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343569061] [2021-12-07 01:39:30,224 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:39:30,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-12-07 01:39:30,224 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:39:30,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-12-07 01:39:30,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1387, Unknown=8, NotChecked=648, Total=2162 [2021-12-07 01:39:30,225 INFO L87 Difference]: Start difference. First operand 76 states and 77 transitions. Second operand has 47 states, 47 states have (on average 3.148936170212766) internal successors, (148), 47 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:39:30,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:39:30,934 INFO L93 Difference]: Finished difference Result 116 states and 117 transitions. [2021-12-07 01:39:30,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-07 01:39:30,934 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 3.148936170212766) internal successors, (148), 47 states have internal predecessors, (148), 0 states have call successors, (0), 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 [2021-12-07 01:39:30,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:39:30,934 INFO L225 Difference]: With dead ends: 116 [2021-12-07 01:39:30,935 INFO L226 Difference]: Without dead ends: 83 [2021-12-07 01:39:30,936 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 126 SyntacticMatches, 10 SemanticMatches, 58 ConstructedPredicates, 8 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=209, Invalid=2467, Unknown=8, NotChecked=856, Total=3540 [2021-12-07 01:39:30,936 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 38 mSDsluCounter, 615 mSDsCounter, 0 mSdLazyCounter, 1438 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 637 SdHoareTripleChecker+Invalid, 2071 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 619 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-07 01:39:30,936 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 637 Invalid, 2071 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1438 Invalid, 0 Unknown, 619 Unchecked, 0.4s Time] [2021-12-07 01:39:30,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-12-07 01:39:30,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 80. [2021-12-07 01:39:30,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 78 states have (on average 1.0384615384615385) internal successors, (81), 79 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) [2021-12-07 01:39:30,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 81 transitions. [2021-12-07 01:39:30,938 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 81 transitions. Word has length 73 [2021-12-07 01:39:30,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:39:30,938 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 81 transitions. [2021-12-07 01:39:30,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 3.148936170212766) internal successors, (148), 47 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:39:30,938 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 81 transitions. [2021-12-07 01:39:30,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-07 01:39:30,938 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:39:30,938 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:39:30,958 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-12-07 01:39:31,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:39:31,140 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-07 01:39:31,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:39:31,141 INFO L85 PathProgramCache]: Analyzing trace with hash 1224585967, now seen corresponding path program 16 times [2021-12-07 01:39:31,141 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:39:31,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661136446] [2021-12-07 01:39:31,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:39:31,142 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:39:31,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:39:31,398 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 91 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:39:31,398 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:39:31,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661136446] [2021-12-07 01:39:31,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661136446] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:39:31,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427309716] [2021-12-07 01:39:31,399 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-07 01:39:31,399 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:39:31,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:39:31,399 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:39:31,400 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-12-07 01:39:31,480 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-07 01:39:31,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:39:31,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 52 conjunts are in the unsatisfiable core [2021-12-07 01:39:31,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:39:31,763 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 128 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:39:31,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:39:32,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-12-07 01:39:32,076 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 128 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:39:32,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427309716] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:39:32,076 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:39:32,076 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21, 21] total 43 [2021-12-07 01:39:32,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717491164] [2021-12-07 01:39:32,076 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:39:32,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-12-07 01:39:32,077 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:39:32,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-12-07 01:39:32,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=1677, Unknown=0, NotChecked=0, Total=1892 [2021-12-07 01:39:32,078 INFO L87 Difference]: Start difference. First operand 80 states and 81 transitions. Second operand has 44 states, 43 states have (on average 3.7209302325581395) internal successors, (160), 44 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) [2021-12-07 01:39:32,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:39:32,594 INFO L93 Difference]: Finished difference Result 87 states and 88 transitions. [2021-12-07 01:39:32,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-07 01:39:32,594 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 3.7209302325581395) internal successors, (160), 44 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) Word has length 77 [2021-12-07 01:39:32,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:39:32,595 INFO L225 Difference]: With dead ends: 87 [2021-12-07 01:39:32,595 INFO L226 Difference]: Without dead ends: 87 [2021-12-07 01:39:32,596 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 570 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=746, Invalid=3160, Unknown=0, NotChecked=0, Total=3906 [2021-12-07 01:39:32,596 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 224 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 867 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 926 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 867 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-07 01:39:32,596 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 320 Invalid, 926 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 867 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-07 01:39:32,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-12-07 01:39:32,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 83. [2021-12-07 01:39:32,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 81 states have (on average 1.037037037037037) internal successors, (84), 82 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) [2021-12-07 01:39:32,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 84 transitions. [2021-12-07 01:39:32,599 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 84 transitions. Word has length 77 [2021-12-07 01:39:32,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:39:32,599 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 84 transitions. [2021-12-07 01:39:32,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 3.7209302325581395) internal successors, (160), 44 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) [2021-12-07 01:39:32,599 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 84 transitions. [2021-12-07 01:39:32,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-12-07 01:39:32,600 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:39:32,600 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:39:32,619 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2021-12-07 01:39:32,801 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-12-07 01:39:32,801 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-07 01:39:32,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:39:32,802 INFO L85 PathProgramCache]: Analyzing trace with hash -692540700, now seen corresponding path program 5 times [2021-12-07 01:39:32,803 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:39:32,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653355407] [2021-12-07 01:39:32,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:39:32,804 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:39:32,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:39:33,076 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 91 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:39:33,076 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:39:33,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653355407] [2021-12-07 01:39:33,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653355407] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:39:33,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094570376] [2021-12-07 01:39:33,076 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-07 01:39:33,076 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:39:33,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:39:33,077 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:39:33,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-12-07 01:39:33,357 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-12-07 01:39:33,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:39:33,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 68 conjunts are in the unsatisfiable core [2021-12-07 01:39:33,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:39:33,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:39:33,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-07 01:39:33,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-07 01:39:33,812 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 120 proven. 161 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:39:33,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:39:34,414 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 153 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:39:34,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094570376] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:39:34,414 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:39:34,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 56 [2021-12-07 01:39:34,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630046696] [2021-12-07 01:39:34,414 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:39:34,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2021-12-07 01:39:34,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:39:34,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-12-07 01:39:34,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=446, Invalid=2746, Unknown=0, NotChecked=0, Total=3192 [2021-12-07 01:39:34,415 INFO L87 Difference]: Start difference. First operand 83 states and 84 transitions. Second operand has 57 states, 56 states have (on average 3.875) internal successors, (217), 57 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) [2021-12-07 01:39:34,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:39:34,841 INFO L93 Difference]: Finished difference Result 86 states and 87 transitions. [2021-12-07 01:39:34,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-07 01:39:34,842 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 56 states have (on average 3.875) internal successors, (217), 57 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 78 [2021-12-07 01:39:34,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:39:34,842 INFO L225 Difference]: With dead ends: 86 [2021-12-07 01:39:34,842 INFO L226 Difference]: Without dead ends: 86 [2021-12-07 01:39:34,843 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 118 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1099 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=858, Invalid=3698, Unknown=0, NotChecked=0, Total=4556 [2021-12-07 01:39:34,843 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 165 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 1099 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 1151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 1099 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-07 01:39:34,843 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 403 Invalid, 1151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 1099 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-07 01:39:34,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-12-07 01:39:34,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 84. [2021-12-07 01:39:34,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 82 states have (on average 1.0365853658536586) internal successors, (85), 83 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) [2021-12-07 01:39:34,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 85 transitions. [2021-12-07 01:39:34,845 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 85 transitions. Word has length 78 [2021-12-07 01:39:34,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:39:34,845 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 85 transitions. [2021-12-07 01:39:34,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 56 states have (on average 3.875) internal successors, (217), 57 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) [2021-12-07 01:39:34,845 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 85 transitions. [2021-12-07 01:39:34,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-12-07 01:39:34,846 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:39:34,846 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:39:34,865 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2021-12-07 01:39:35,046 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-12-07 01:39:35,047 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-07 01:39:35,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:39:35,048 INFO L85 PathProgramCache]: Analyzing trace with hash 1542890378, now seen corresponding path program 17 times [2021-12-07 01:39:35,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:39:35,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015640973] [2021-12-07 01:39:35,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:39:35,049 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:39:35,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:39:35,471 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 17 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:39:35,471 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:39:35,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015640973] [2021-12-07 01:39:35,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015640973] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:39:35,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596863385] [2021-12-07 01:39:35,472 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-07 01:39:35,472 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:39:35,472 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:39:35,472 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:39:35,473 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-12-07 01:39:35,910 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-12-07 01:39:35,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:39:35,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 104 conjunts are in the unsatisfiable core [2021-12-07 01:39:35,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:39:35,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-07 01:39:36,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-07 01:39:36,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-07 01:39:36,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-07 01:39:36,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-07 01:39:36,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-07 01:39:36,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-07 01:39:36,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-07 01:39:36,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-07 01:39:36,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-07 01:39:36,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-07 01:39:36,396 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 17 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:39:36,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:39:36,404 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1406 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_1406) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstpcpy_~from#1.offset| 1)) 0)) is different from false [2021-12-07 01:39:36,409 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1406 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_1406) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ 2 |c_ULTIMATE.start_cstpcpy_~from#1.offset|)) 0)) is different from false [2021-12-07 01:39:36,416 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1406 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_1406) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ 3 |c_ULTIMATE.start_cstpcpy_~from#1.offset|)) 0)) is different from false [2021-12-07 01:39:36,423 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1406 (Array Int Int))) (= 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_1406) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstpcpy_~from#1.offset| 4)))) is different from false [2021-12-07 01:39:36,430 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1406 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_1406) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ 5 |c_ULTIMATE.start_cstpcpy_~from#1.offset|)) 0)) is different from false [2021-12-07 01:39:36,438 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1406 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_1406) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ 6 |c_ULTIMATE.start_cstpcpy_~from#1.offset|)) 0)) is different from false [2021-12-07 01:39:36,445 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1406 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_1406) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ 7 |c_ULTIMATE.start_cstpcpy_~from#1.offset|)) 0)) is different from false [2021-12-07 01:39:36,452 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1406 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_1406) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstpcpy_~from#1.offset| 8)) 0)) is different from false [2021-12-07 01:39:36,460 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1406 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetArea~0#1.base| v_ArrVal_1406) |c_ULTIMATE.start_main_~nondetString~0#1.base|) (+ 8 |c_ULTIMATE.start_main_~nondetString~0#1.offset|)) 0)) is different from false [2021-12-07 01:39:36,463 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 01:39:36,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-07 01:39:36,467 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 01:39:36,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-12-07 01:39:36,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-07 01:39:36,654 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 17 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 135 not checked. [2021-12-07 01:39:36,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596863385] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:39:36,654 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:39:36,654 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26, 26] total 51 [2021-12-07 01:39:36,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697478184] [2021-12-07 01:39:36,654 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:39:36,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-12-07 01:39:36,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:39:36,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-12-07 01:39:36,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1621, Unknown=9, NotChecked=792, Total=2550 [2021-12-07 01:39:36,655 INFO L87 Difference]: Start difference. First operand 84 states and 85 transitions. Second operand has 51 states, 51 states have (on average 3.235294117647059) internal successors, (165), 51 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) [2021-12-07 01:39:37,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:39:37,419 INFO L93 Difference]: Finished difference Result 128 states and 129 transitions. [2021-12-07 01:39:37,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-07 01:39:37,420 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 3.235294117647059) internal successors, (165), 51 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 81 [2021-12-07 01:39:37,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:39:37,420 INFO L225 Difference]: With dead ends: 128 [2021-12-07 01:39:37,420 INFO L226 Difference]: Without dead ends: 91 [2021-12-07 01:39:37,421 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 141 SyntacticMatches, 11 SemanticMatches, 63 ConstructedPredicates, 9 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=224, Invalid=2883, Unknown=9, NotChecked=1044, Total=4160 [2021-12-07 01:39:37,421 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 57 mSDsluCounter, 690 mSDsCounter, 0 mSdLazyCounter, 1566 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 714 SdHoareTripleChecker+Invalid, 2438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 849 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-07 01:39:37,422 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 714 Invalid, 2438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1566 Invalid, 0 Unknown, 849 Unchecked, 0.4s Time] [2021-12-07 01:39:37,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-12-07 01:39:37,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 88. [2021-12-07 01:39:37,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 86 states have (on average 1.0348837209302326) internal successors, (89), 87 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) [2021-12-07 01:39:37,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 89 transitions. [2021-12-07 01:39:37,424 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 89 transitions. Word has length 81 [2021-12-07 01:39:37,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:39:37,424 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 89 transitions. [2021-12-07 01:39:37,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 3.235294117647059) internal successors, (165), 51 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) [2021-12-07 01:39:37,425 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 89 transitions. [2021-12-07 01:39:37,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-12-07 01:39:37,425 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:39:37,425 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:39:37,445 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2021-12-07 01:39:37,626 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-12-07 01:39:37,626 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-07 01:39:37,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:39:37,627 INFO L85 PathProgramCache]: Analyzing trace with hash -1345446643, now seen corresponding path program 18 times [2021-12-07 01:39:37,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:39:37,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582046771] [2021-12-07 01:39:37,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:39:37,629 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:39:37,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:39:37,912 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 120 proven. 223 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:39:37,912 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:39:37,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582046771] [2021-12-07 01:39:37,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582046771] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:39:37,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859844120] [2021-12-07 01:39:37,912 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-07 01:39:37,912 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:39:37,912 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:39:37,913 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:39:37,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-12-07 01:39:38,925 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-12-07 01:39:38,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:39:38,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 49 conjunts are in the unsatisfiable core [2021-12-07 01:39:38,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:39:39,266 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 162 proven. 181 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:39:39,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:39:39,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-12-07 01:39:39,595 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 162 proven. 181 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:39:39,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1859844120] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:39:39,595 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:39:39,595 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 57 [2021-12-07 01:39:39,595 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310636504] [2021-12-07 01:39:39,595 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:39:39,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2021-12-07 01:39:39,596 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:39:39,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-12-07 01:39:39,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=506, Invalid=2800, Unknown=0, NotChecked=0, Total=3306 [2021-12-07 01:39:39,596 INFO L87 Difference]: Start difference. First operand 88 states and 89 transitions. Second operand has 58 states, 57 states have (on average 3.6666666666666665) internal successors, (209), 58 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:39:40,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:39:40,011 INFO L93 Difference]: Finished difference Result 95 states and 96 transitions. [2021-12-07 01:39:40,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-07 01:39:40,012 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 57 states have (on average 3.6666666666666665) internal successors, (209), 58 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-12-07 01:39:40,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:39:40,012 INFO L225 Difference]: With dead ends: 95 [2021-12-07 01:39:40,012 INFO L226 Difference]: Without dead ends: 95 [2021-12-07 01:39:40,013 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1286 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=965, Invalid=3865, Unknown=0, NotChecked=0, Total=4830 [2021-12-07 01:39:40,013 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 332 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 840 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 332 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 934 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 840 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-07 01:39:40,013 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [332 Valid, 309 Invalid, 934 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 840 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-07 01:39:40,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-12-07 01:39:40,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 91. [2021-12-07 01:39:40,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 89 states have (on average 1.0337078651685394) internal successors, (92), 90 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:39:40,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 92 transitions. [2021-12-07 01:39:40,015 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 92 transitions. Word has length 85 [2021-12-07 01:39:40,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:39:40,015 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 92 transitions. [2021-12-07 01:39:40,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 57 states have (on average 3.6666666666666665) internal successors, (209), 58 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:39:40,015 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 92 transitions. [2021-12-07 01:39:40,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-12-07 01:39:40,016 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:39:40,016 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:39:40,036 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2021-12-07 01:39:40,216 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-12-07 01:39:40,217 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-07 01:39:40,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:39:40,218 INFO L85 PathProgramCache]: Analyzing trace with hash 1240827014, now seen corresponding path program 6 times [2021-12-07 01:39:40,218 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:39:40,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918974441] [2021-12-07 01:39:40,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:39:40,219 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:39:40,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:39:40,500 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 120 proven. 232 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:39:40,500 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:39:40,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918974441] [2021-12-07 01:39:40,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918974441] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:39:40,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328957821] [2021-12-07 01:39:40,500 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-07 01:39:40,500 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:39:40,500 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:39:40,501 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:39:40,506 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-12-07 01:39:41,448 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-12-07 01:39:41,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:39:41,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 63 conjunts are in the unsatisfiable core [2021-12-07 01:39:41,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:39:41,471 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 01:39:41,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-07 01:39:41,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-07 01:39:42,596 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 162 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:39:42,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:39:43,454 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 190 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:39:43,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328957821] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:39:43,455 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:39:43,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23, 23] total 66 [2021-12-07 01:39:43,455 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533282733] [2021-12-07 01:39:43,455 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:39:43,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2021-12-07 01:39:43,455 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:39:43,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-12-07 01:39:43,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=531, Invalid=3891, Unknown=0, NotChecked=0, Total=4422 [2021-12-07 01:39:43,456 INFO L87 Difference]: Start difference. First operand 91 states and 92 transitions. Second operand has 67 states, 66 states have (on average 3.787878787878788) internal successors, (250), 67 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:39:44,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:39:44,566 INFO L93 Difference]: Finished difference Result 93 states and 94 transitions. [2021-12-07 01:39:44,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-07 01:39:44,566 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 66 states have (on average 3.787878787878788) internal successors, (250), 67 states have internal predecessors, (250), 0 states have call successors, (0), 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 86 [2021-12-07 01:39:44,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:39:44,567 INFO L225 Difference]: With dead ends: 93 [2021-12-07 01:39:44,567 INFO L226 Difference]: Without dead ends: 93 [2021-12-07 01:39:44,568 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 128 SyntacticMatches, 18 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2505 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1002, Invalid=7008, Unknown=0, NotChecked=0, Total=8010 [2021-12-07 01:39:44,568 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 26 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 462 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 130 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 01:39:44,569 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 402 Invalid, 596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 462 Invalid, 0 Unknown, 130 Unchecked, 0.1s Time] [2021-12-07 01:39:44,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-12-07 01:39:44,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2021-12-07 01:39:44,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 90 states have (on average 1.0333333333333334) internal successors, (93), 91 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) [2021-12-07 01:39:44,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 93 transitions. [2021-12-07 01:39:44,571 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 93 transitions. Word has length 86 [2021-12-07 01:39:44,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:39:44,571 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 93 transitions. [2021-12-07 01:39:44,572 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 66 states have (on average 3.787878787878788) internal successors, (250), 67 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:39:44,572 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 93 transitions. [2021-12-07 01:39:44,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-12-07 01:39:44,572 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:39:44,572 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:39:44,592 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2021-12-07 01:39:44,773 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-12-07 01:39:44,773 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-07 01:39:44,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:39:44,774 INFO L85 PathProgramCache]: Analyzing trace with hash -1305948504, now seen corresponding path program 19 times [2021-12-07 01:39:44,775 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:39:44,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488757981] [2021-12-07 01:39:44,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:39:44,776 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:39:44,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:39:45,166 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 19 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:39:45,166 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:39:45,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488757981] [2021-12-07 01:39:45,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488757981] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:39:45,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310352068] [2021-12-07 01:39:45,166 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-07 01:39:45,166 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:39:45,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:39:45,167 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:39:45,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-12-07 01:39:45,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:39:45,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 113 conjunts are in the unsatisfiable core [2021-12-07 01:39:45,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:39:45,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-07 01:39:45,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-07 01:39:45,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-07 01:39:45,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-07 01:39:45,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-07 01:39:45,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-07 01:39:45,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-07 01:39:45,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-07 01:39:45,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-07 01:39:45,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-07 01:39:45,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-07 01:39:45,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-07 01:39:45,820 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 19 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:39:45,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:39:45,829 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1696 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_1696) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstpcpy_~from#1.offset| 1)) 0)) is different from false [2021-12-07 01:39:45,834 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1696 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_1696) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ 2 |c_ULTIMATE.start_cstpcpy_~from#1.offset|)) 0)) is different from false [2021-12-07 01:39:45,843 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1696 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_1696) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ 3 |c_ULTIMATE.start_cstpcpy_~from#1.offset|)) 0)) is different from false [2021-12-07 01:39:45,851 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1696 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_1696) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstpcpy_~from#1.offset| 4)) 0)) is different from false [2021-12-07 01:39:45,859 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1696 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_1696) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ 5 |c_ULTIMATE.start_cstpcpy_~from#1.offset|)) 0)) is different from false [2021-12-07 01:39:45,869 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1696 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_1696) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ 6 |c_ULTIMATE.start_cstpcpy_~from#1.offset|)) 0)) is different from false [2021-12-07 01:39:45,877 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1696 (Array Int Int))) (= 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_1696) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ 7 |c_ULTIMATE.start_cstpcpy_~from#1.offset|)))) is different from false [2021-12-07 01:39:45,887 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1696 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_1696) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstpcpy_~from#1.offset| 8)) 0)) is different from false [2021-12-07 01:39:45,897 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1696 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_1696) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ 9 |c_ULTIMATE.start_cstpcpy_~from#1.offset|)) 0)) is different from false [2021-12-07 01:39:45,905 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1696 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetArea~0#1.base| v_ArrVal_1696) |c_ULTIMATE.start_main_~nondetString~0#1.base|) (+ 9 |c_ULTIMATE.start_main_~nondetString~0#1.offset|)) 0)) is different from false [2021-12-07 01:39:45,909 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 01:39:45,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-07 01:39:45,912 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 01:39:45,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-12-07 01:39:45,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-07 01:39:46,112 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 19 proven. 191 refuted. 0 times theorem prover too weak. 0 trivial. 170 not checked. [2021-12-07 01:39:46,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310352068] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:39:46,112 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:39:46,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 28, 28] total 55 [2021-12-07 01:39:46,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080377165] [2021-12-07 01:39:46,113 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:39:46,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-12-07 01:39:46,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:39:46,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-12-07 01:39:46,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1873, Unknown=10, NotChecked=950, Total=2970 [2021-12-07 01:39:46,114 INFO L87 Difference]: Start difference. First operand 92 states and 93 transitions. Second operand has 55 states, 55 states have (on average 3.290909090909091) internal successors, (181), 55 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) [2021-12-07 01:39:47,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:39:47,098 INFO L93 Difference]: Finished difference Result 140 states and 141 transitions. [2021-12-07 01:39:47,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-12-07 01:39:47,098 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 3.290909090909091) internal successors, (181), 55 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 89 [2021-12-07 01:39:47,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:39:47,099 INFO L225 Difference]: With dead ends: 140 [2021-12-07 01:39:47,099 INFO L226 Difference]: Without dead ends: 99 [2021-12-07 01:39:47,099 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 156 SyntacticMatches, 12 SemanticMatches, 68 ConstructedPredicates, 10 IntricatePredicates, 0 DeprecatedPredicates, 566 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=239, Invalid=3331, Unknown=10, NotChecked=1250, Total=4830 [2021-12-07 01:39:47,100 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 45 mSDsluCounter, 812 mSDsCounter, 0 mSdLazyCounter, 2002 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 838 SdHoareTripleChecker+Invalid, 2989 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 2002 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 971 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-07 01:39:47,100 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 838 Invalid, 2989 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 2002 Invalid, 0 Unknown, 971 Unchecked, 0.5s Time] [2021-12-07 01:39:47,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-12-07 01:39:47,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 96. [2021-12-07 01:39:47,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 94 states have (on average 1.0319148936170213) internal successors, (97), 95 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:39:47,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 97 transitions. [2021-12-07 01:39:47,101 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 97 transitions. Word has length 89 [2021-12-07 01:39:47,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:39:47,102 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 97 transitions. [2021-12-07 01:39:47,102 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 3.290909090909091) internal successors, (181), 55 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) [2021-12-07 01:39:47,102 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 97 transitions. [2021-12-07 01:39:47,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-12-07 01:39:47,102 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:39:47,102 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:39:47,121 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2021-12-07 01:39:47,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:39:47,304 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-07 01:39:47,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:39:47,305 INFO L85 PathProgramCache]: Analyzing trace with hash 1987843371, now seen corresponding path program 20 times [2021-12-07 01:39:47,305 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:39:47,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103819761] [2021-12-07 01:39:47,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:39:47,306 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:39:47,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:39:47,620 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 153 proven. 268 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:39:47,620 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:39:47,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103819761] [2021-12-07 01:39:47,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103819761] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:39:47,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306230503] [2021-12-07 01:39:47,620 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 01:39:47,621 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:39:47,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:39:47,621 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:39:47,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-12-07 01:39:47,729 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-07 01:39:47,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:39:47,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 63 conjunts are in the unsatisfiable core [2021-12-07 01:39:47,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:39:48,017 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 190 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:39:48,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:39:48,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-07 01:39:48,365 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 190 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:39:48,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306230503] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:39:48,366 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:39:48,366 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26, 26] total 53 [2021-12-07 01:39:48,366 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740227528] [2021-12-07 01:39:48,366 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:39:48,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-12-07 01:39:48,366 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:39:48,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-12-07 01:39:48,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=363, Invalid=2499, Unknown=0, NotChecked=0, Total=2862 [2021-12-07 01:39:48,367 INFO L87 Difference]: Start difference. First operand 96 states and 97 transitions. Second operand has 54 states, 53 states have (on average 3.547169811320755) internal successors, (188), 54 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) [2021-12-07 01:39:48,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:39:48,884 INFO L93 Difference]: Finished difference Result 103 states and 104 transitions. [2021-12-07 01:39:48,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-07 01:39:48,884 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 53 states have (on average 3.547169811320755) internal successors, (188), 54 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) Word has length 93 [2021-12-07 01:39:48,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:39:48,885 INFO L225 Difference]: With dead ends: 103 [2021-12-07 01:39:48,885 INFO L226 Difference]: Without dead ends: 103 [2021-12-07 01:39:48,885 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 155 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1155 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=831, Invalid=3591, Unknown=0, NotChecked=0, Total=4422 [2021-12-07 01:39:48,886 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 424 mSDsluCounter, 451 mSDsCounter, 0 mSdLazyCounter, 1292 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 424 SdHoareTripleChecker+Valid, 478 SdHoareTripleChecker+Invalid, 1417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 1292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-07 01:39:48,886 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [424 Valid, 478 Invalid, 1417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 1292 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-07 01:39:48,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-12-07 01:39:48,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 99. [2021-12-07 01:39:48,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 97 states have (on average 1.0309278350515463) internal successors, (100), 98 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) [2021-12-07 01:39:48,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 100 transitions. [2021-12-07 01:39:48,888 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 100 transitions. Word has length 93 [2021-12-07 01:39:48,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:39:48,888 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 100 transitions. [2021-12-07 01:39:48,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 53 states have (on average 3.547169811320755) internal successors, (188), 54 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) [2021-12-07 01:39:48,888 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 100 transitions. [2021-12-07 01:39:48,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-12-07 01:39:48,888 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:39:48,888 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:39:48,907 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-12-07 01:39:49,089 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-12-07 01:39:49,090 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-07 01:39:49,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:39:49,091 INFO L85 PathProgramCache]: Analyzing trace with hash 1493602344, now seen corresponding path program 7 times [2021-12-07 01:39:49,091 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:39:49,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916239305] [2021-12-07 01:39:49,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:39:49,092 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:39:49,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:39:49,410 INFO L134 CoverageAnalysis]: Checked inductivity of 431 backedges. 153 proven. 278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:39:49,410 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:39:49,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916239305] [2021-12-07 01:39:49,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916239305] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:39:49,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007781061] [2021-12-07 01:39:49,410 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-07 01:39:49,410 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:39:49,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:39:49,411 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:39:49,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-12-07 01:39:49,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:39:49,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 467 conjuncts, 75 conjunts are in the unsatisfiable core [2021-12-07 01:39:49,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:39:49,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:39:49,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-07 01:39:49,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-07 01:39:50,168 INFO L134 CoverageAnalysis]: Checked inductivity of 431 backedges. 190 proven. 241 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:39:50,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:39:51,015 INFO L134 CoverageAnalysis]: Checked inductivity of 431 backedges. 231 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:39:51,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2007781061] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:39:51,016 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:39:51,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25, 25] total 71 [2021-12-07 01:39:51,016 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071285828] [2021-12-07 01:39:51,016 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:39:51,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2021-12-07 01:39:51,016 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:39:51,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2021-12-07 01:39:51,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=4512, Unknown=0, NotChecked=0, Total=5112 [2021-12-07 01:39:51,017 INFO L87 Difference]: Start difference. First operand 99 states and 100 transitions. Second operand has 72 states, 71 states have (on average 3.8450704225352115) internal successors, (273), 72 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:39:51,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:39:51,897 INFO L93 Difference]: Finished difference Result 102 states and 103 transitions. [2021-12-07 01:39:51,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-07 01:39:51,897 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 71 states have (on average 3.8450704225352115) internal successors, (273), 72 states have internal predecessors, (273), 0 states have call successors, (0), 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 94 [2021-12-07 01:39:51,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:39:51,898 INFO L225 Difference]: With dead ends: 102 [2021-12-07 01:39:51,898 INFO L226 Difference]: Without dead ends: 102 [2021-12-07 01:39:51,898 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 139 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2009 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1574, Invalid=7356, Unknown=0, NotChecked=0, Total=8930 [2021-12-07 01:39:51,898 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 239 mSDsluCounter, 475 mSDsCounter, 0 mSdLazyCounter, 1397 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 502 SdHoareTripleChecker+Invalid, 1474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 1397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-07 01:39:51,899 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [239 Valid, 502 Invalid, 1474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 1397 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-07 01:39:51,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-12-07 01:39:51,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 100. [2021-12-07 01:39:51,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 98 states have (on average 1.030612244897959) internal successors, (101), 99 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:39:51,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 101 transitions. [2021-12-07 01:39:51,900 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 101 transitions. Word has length 94 [2021-12-07 01:39:51,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:39:51,901 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 101 transitions. [2021-12-07 01:39:51,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 71 states have (on average 3.8450704225352115) internal successors, (273), 72 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:39:51,901 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 101 transitions. [2021-12-07 01:39:51,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-12-07 01:39:51,901 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:39:51,901 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:39:51,931 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2021-12-07 01:39:52,102 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:39:52,102 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-07 01:39:52,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:39:52,103 INFO L85 PathProgramCache]: Analyzing trace with hash 46237638, now seen corresponding path program 21 times [2021-12-07 01:39:52,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:39:52,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638326495] [2021-12-07 01:39:52,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:39:52,104 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:39:52,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:39:52,605 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 21 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:39:52,605 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:39:52,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638326495] [2021-12-07 01:39:52,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638326495] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:39:52,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728939992] [2021-12-07 01:39:52,605 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-07 01:39:52,605 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:39:52,605 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:39:52,606 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:39:52,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-12-07 01:39:53,545 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-12-07 01:39:53,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:39:53,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 126 conjunts are in the unsatisfiable core [2021-12-07 01:39:53,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:39:53,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-07 01:39:53,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-07 01:39:53,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-07 01:39:54,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-07 01:39:54,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-07 01:39:54,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-07 01:39:54,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-07 01:39:54,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-07 01:39:54,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-07 01:39:54,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-07 01:39:54,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-07 01:39:54,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-07 01:39:54,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-07 01:39:54,112 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 21 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:39:54,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:39:54,143 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2012 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_2012) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstpcpy_~from#1.offset| 1)) 0)) is different from false [2021-12-07 01:39:54,149 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2012 (Array Int Int))) (= 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_2012) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ 2 |c_ULTIMATE.start_cstpcpy_~from#1.offset|)))) is different from false [2021-12-07 01:39:54,159 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2012 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_2012) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ 3 |c_ULTIMATE.start_cstpcpy_~from#1.offset|)) 0)) is different from false [2021-12-07 01:39:54,169 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2012 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_2012) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstpcpy_~from#1.offset| 4)) 0)) is different from false [2021-12-07 01:39:54,178 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2012 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_2012) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ 5 |c_ULTIMATE.start_cstpcpy_~from#1.offset|)) 0)) is different from false [2021-12-07 01:39:54,186 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2012 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_2012) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ 6 |c_ULTIMATE.start_cstpcpy_~from#1.offset|)) 0)) is different from false [2021-12-07 01:39:54,194 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2012 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_2012) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ 7 |c_ULTIMATE.start_cstpcpy_~from#1.offset|)) 0)) is different from false [2021-12-07 01:39:54,203 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2012 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_2012) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstpcpy_~from#1.offset| 8)) 0)) is different from false [2021-12-07 01:39:54,211 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2012 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_2012) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ 9 |c_ULTIMATE.start_cstpcpy_~from#1.offset|)) 0)) is different from false [2021-12-07 01:39:54,225 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2012 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_2012) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstpcpy_~from#1.offset| 10)) 0)) is different from false [2021-12-07 01:39:54,233 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2012 (Array Int Int))) (= 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetArea~0#1.base| v_ArrVal_2012) |c_ULTIMATE.start_main_~nondetString~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString~0#1.offset| 10)))) is different from false [2021-12-07 01:39:54,237 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 01:39:54,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-07 01:39:54,240 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 01:39:54,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-12-07 01:39:54,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-07 01:39:54,468 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 21 proven. 232 refuted. 0 times theorem prover too weak. 0 trivial. 209 not checked. [2021-12-07 01:39:54,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728939992] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:39:54,468 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:39:54,468 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 30] total 59 [2021-12-07 01:39:54,468 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65379751] [2021-12-07 01:39:54,468 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:39:54,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-12-07 01:39:54,469 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:39:54,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-12-07 01:39:54,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=2143, Unknown=11, NotChecked=1122, Total=3422 [2021-12-07 01:39:54,469 INFO L87 Difference]: Start difference. First operand 100 states and 101 transitions. Second operand has 59 states, 59 states have (on average 3.3220338983050848) internal successors, (196), 59 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:39:55,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:39:55,462 INFO L93 Difference]: Finished difference Result 152 states and 153 transitions. [2021-12-07 01:39:55,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-12-07 01:39:55,462 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 3.3220338983050848) internal successors, (196), 59 states have internal predecessors, (196), 0 states have call successors, (0), 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 [2021-12-07 01:39:55,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:39:55,463 INFO L225 Difference]: With dead ends: 152 [2021-12-07 01:39:55,463 INFO L226 Difference]: Without dead ends: 107 [2021-12-07 01:39:55,463 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 171 SyntacticMatches, 13 SemanticMatches, 73 ConstructedPredicates, 11 IntricatePredicates, 0 DeprecatedPredicates, 637 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=254, Invalid=3811, Unknown=11, NotChecked=1474, Total=5550 [2021-12-07 01:39:55,463 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 74 mSDsluCounter, 917 mSDsCounter, 0 mSdLazyCounter, 2258 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 945 SdHoareTripleChecker+Invalid, 3373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 2258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1087 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-07 01:39:55,463 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 945 Invalid, 3373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 2258 Invalid, 0 Unknown, 1087 Unchecked, 0.5s Time] [2021-12-07 01:39:55,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-12-07 01:39:55,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 104. [2021-12-07 01:39:55,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 102 states have (on average 1.0294117647058822) internal successors, (105), 103 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) [2021-12-07 01:39:55,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 105 transitions. [2021-12-07 01:39:55,465 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 105 transitions. Word has length 97 [2021-12-07 01:39:55,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:39:55,465 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 105 transitions. [2021-12-07 01:39:55,465 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 3.3220338983050848) internal successors, (196), 59 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:39:55,466 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 105 transitions. [2021-12-07 01:39:55,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-07 01:39:55,466 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:39:55,466 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:39:55,486 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2021-12-07 01:39:55,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:39:55,667 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-07 01:39:55,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:39:55,668 INFO L85 PathProgramCache]: Analyzing trace with hash 1500748617, now seen corresponding path program 22 times [2021-12-07 01:39:55,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:39:55,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910835826] [2021-12-07 01:39:55,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:39:55,669 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:39:55,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:39:55,985 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 190 proven. 317 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:39:55,985 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:39:55,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910835826] [2021-12-07 01:39:55,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910835826] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:39:55,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011526817] [2021-12-07 01:39:55,985 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-07 01:39:55,985 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:39:55,985 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:39:55,986 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:39:55,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-12-07 01:39:56,083 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-07 01:39:56,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:39:56,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 67 conjunts are in the unsatisfiable core [2021-12-07 01:39:56,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:39:56,385 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 242 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:39:56,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:39:56,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-12-07 01:39:56,771 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 242 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:39:56,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1011526817] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:39:56,772 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:39:56,772 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 56 [2021-12-07 01:39:56,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812420817] [2021-12-07 01:39:56,772 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:39:56,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2021-12-07 01:39:56,772 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:39:56,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-12-07 01:39:56,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=414, Invalid=2778, Unknown=0, NotChecked=0, Total=3192 [2021-12-07 01:39:56,773 INFO L87 Difference]: Start difference. First operand 104 states and 105 transitions. Second operand has 57 states, 56 states have (on average 3.7142857142857144) internal successors, (208), 57 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:39:57,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:39:57,405 INFO L93 Difference]: Finished difference Result 111 states and 112 transitions. [2021-12-07 01:39:57,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-07 01:39:57,405 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 56 states have (on average 3.7142857142857144) internal successors, (208), 57 states have internal predecessors, (208), 0 states have call successors, (0), 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 101 [2021-12-07 01:39:57,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:39:57,406 INFO L225 Difference]: With dead ends: 111 [2021-12-07 01:39:57,406 INFO L226 Difference]: Without dead ends: 111 [2021-12-07 01:39:57,406 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1219 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=939, Invalid=4031, Unknown=0, NotChecked=0, Total=4970 [2021-12-07 01:39:57,406 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 456 mSDsluCounter, 536 mSDsCounter, 0 mSdLazyCounter, 1545 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 456 SdHoareTripleChecker+Valid, 565 SdHoareTripleChecker+Invalid, 1669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 1545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-07 01:39:57,406 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [456 Valid, 565 Invalid, 1669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 1545 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-07 01:39:57,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-12-07 01:39:57,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 107. [2021-12-07 01:39:57,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 105 states have (on average 1.0285714285714285) internal successors, (108), 106 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:39:57,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 108 transitions. [2021-12-07 01:39:57,408 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 108 transitions. Word has length 101 [2021-12-07 01:39:57,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:39:57,408 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 108 transitions. [2021-12-07 01:39:57,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 56 states have (on average 3.7142857142857144) internal successors, (208), 57 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:39:57,409 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 108 transitions. [2021-12-07 01:39:57,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-12-07 01:39:57,409 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:39:57,409 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:39:57,430 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2021-12-07 01:39:57,610 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-12-07 01:39:57,610 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-07 01:39:57,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:39:57,611 INFO L85 PathProgramCache]: Analyzing trace with hash -721433142, now seen corresponding path program 8 times [2021-12-07 01:39:57,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:39:57,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972736173] [2021-12-07 01:39:57,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:39:57,613 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:39:57,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:39:57,905 INFO L134 CoverageAnalysis]: Checked inductivity of 518 backedges. 190 proven. 328 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:39:57,906 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:39:57,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972736173] [2021-12-07 01:39:57,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972736173] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:39:57,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503369314] [2021-12-07 01:39:57,906 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 01:39:57,906 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:39:57,906 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:39:57,907 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:39:57,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-12-07 01:39:58,015 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-07 01:39:58,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:39:58,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 504 conjuncts, 76 conjunts are in the unsatisfiable core [2021-12-07 01:39:58,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:39:58,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:39:58,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-07 01:39:58,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-07 01:39:58,734 INFO L134 CoverageAnalysis]: Checked inductivity of 518 backedges. 231 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:39:58,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:39:59,656 INFO L134 CoverageAnalysis]: Checked inductivity of 518 backedges. 276 proven. 242 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:39:59,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503369314] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:39:59,656 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:39:59,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 27, 27] total 77 [2021-12-07 01:39:59,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007642698] [2021-12-07 01:39:59,657 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:39:59,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2021-12-07 01:39:59,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:39:59,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2021-12-07 01:39:59,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=695, Invalid=5311, Unknown=0, NotChecked=0, Total=6006 [2021-12-07 01:39:59,658 INFO L87 Difference]: Start difference. First operand 107 states and 108 transitions. Second operand has 78 states, 77 states have (on average 3.857142857142857) internal successors, (297), 78 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:40:00,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:40:00,664 INFO L93 Difference]: Finished difference Result 110 states and 111 transitions. [2021-12-07 01:40:00,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-07 01:40:00,664 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 77 states have (on average 3.857142857142857) internal successors, (297), 78 states have internal predecessors, (297), 0 states have call successors, (0), 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 [2021-12-07 01:40:00,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:40:00,665 INFO L225 Difference]: With dead ends: 110 [2021-12-07 01:40:00,665 INFO L226 Difference]: Without dead ends: 110 [2021-12-07 01:40:00,666 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 151 SyntacticMatches, 1 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2396 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1835, Invalid=8671, Unknown=0, NotChecked=0, Total=10506 [2021-12-07 01:40:00,666 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 424 mSDsluCounter, 575 mSDsCounter, 0 mSdLazyCounter, 1679 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 424 SdHoareTripleChecker+Valid, 604 SdHoareTripleChecker+Invalid, 1812 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 1679 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-07 01:40:00,666 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [424 Valid, 604 Invalid, 1812 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 1679 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-07 01:40:00,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-12-07 01:40:00,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 108. [2021-12-07 01:40:00,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 106 states have (on average 1.028301886792453) internal successors, (109), 107 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) [2021-12-07 01:40:00,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 109 transitions. [2021-12-07 01:40:00,668 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 109 transitions. Word has length 102 [2021-12-07 01:40:00,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:40:00,668 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 109 transitions. [2021-12-07 01:40:00,668 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 77 states have (on average 3.857142857142857) internal successors, (297), 78 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:40:00,668 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 109 transitions. [2021-12-07 01:40:00,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-12-07 01:40:00,668 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:40:00,668 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:40:00,688 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-12-07 01:40:00,869 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-12-07 01:40:00,870 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-07 01:40:00,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:40:00,871 INFO L85 PathProgramCache]: Analyzing trace with hash -198390044, now seen corresponding path program 23 times [2021-12-07 01:40:00,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:40:00,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692230631] [2021-12-07 01:40:00,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:40:00,872 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:40:00,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:40:01,422 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 23 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:40:01,422 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:40:01,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692230631] [2021-12-07 01:40:01,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692230631] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:40:01,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97515863] [2021-12-07 01:40:01,422 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-07 01:40:01,422 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:40:01,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:40:01,423 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:40:01,423 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-12-07 01:40:02,013 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-12-07 01:40:02,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:40:02,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 521 conjuncts, 129 conjunts are in the unsatisfiable core [2021-12-07 01:40:02,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:40:02,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-07 01:40:02,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-07 01:40:02,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-07 01:40:02,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-07 01:40:02,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-07 01:40:02,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-07 01:40:02,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-07 01:40:02,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-07 01:40:02,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-07 01:40:02,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-07 01:40:02,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-07 01:40:02,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-07 01:40:02,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-07 01:40:02,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-07 01:40:02,658 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 23 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:40:02,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:40:02,666 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2352 (Array Int Int))) (= 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_2352) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstpcpy_~from#1.offset| 1)))) is different from false [2021-12-07 01:40:02,671 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2352 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_2352) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ 2 |c_ULTIMATE.start_cstpcpy_~from#1.offset|)) 0)) is different from false [2021-12-07 01:40:02,678 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2352 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_2352) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ 3 |c_ULTIMATE.start_cstpcpy_~from#1.offset|)) 0)) is different from false [2021-12-07 01:40:02,685 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2352 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_2352) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstpcpy_~from#1.offset| 4)) 0)) is different from false [2021-12-07 01:40:02,692 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2352 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_2352) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ 5 |c_ULTIMATE.start_cstpcpy_~from#1.offset|)) 0)) is different from false [2021-12-07 01:40:02,699 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2352 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_2352) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ 6 |c_ULTIMATE.start_cstpcpy_~from#1.offset|)) 0)) is different from false [2021-12-07 01:40:02,706 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2352 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_2352) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ 7 |c_ULTIMATE.start_cstpcpy_~from#1.offset|)) 0)) is different from false [2021-12-07 01:40:02,714 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2352 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_2352) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstpcpy_~from#1.offset| 8)) 0)) is different from false [2021-12-07 01:40:02,727 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2352 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_2352) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ 9 |c_ULTIMATE.start_cstpcpy_~from#1.offset|)) 0)) is different from false [2021-12-07 01:40:02,734 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2352 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_2352) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstpcpy_~from#1.offset| 10)) 0)) is different from false [2021-12-07 01:40:02,742 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2352 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_2352) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstpcpy_~from#1.offset| 11)) 0)) is different from false [2021-12-07 01:40:02,749 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2352 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetArea~0#1.base| v_ArrVal_2352) |c_ULTIMATE.start_main_~nondetString~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString~0#1.offset| 11)) 0)) is different from false [2021-12-07 01:40:02,753 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 01:40:02,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-07 01:40:02,756 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 01:40:02,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-12-07 01:40:02,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-07 01:40:02,974 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 23 proven. 277 refuted. 0 times theorem prover too weak. 0 trivial. 252 not checked. [2021-12-07 01:40:02,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97515863] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:40:02,974 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:40:02,974 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 32, 32] total 63 [2021-12-07 01:40:02,974 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865047145] [2021-12-07 01:40:02,974 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:40:02,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2021-12-07 01:40:02,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:40:02,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-12-07 01:40:02,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=2431, Unknown=12, NotChecked=1308, Total=3906 [2021-12-07 01:40:02,975 INFO L87 Difference]: Start difference. First operand 108 states and 109 transitions. Second operand has 63 states, 63 states have (on average 3.380952380952381) internal successors, (213), 63 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) [2021-12-07 01:40:04,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:40:04,222 INFO L93 Difference]: Finished difference Result 164 states and 165 transitions. [2021-12-07 01:40:04,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-12-07 01:40:04,223 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 3.380952380952381) internal successors, (213), 63 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 105 [2021-12-07 01:40:04,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:40:04,223 INFO L225 Difference]: With dead ends: 164 [2021-12-07 01:40:04,223 INFO L226 Difference]: Without dead ends: 115 [2021-12-07 01:40:04,224 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 186 SyntacticMatches, 14 SemanticMatches, 79 ConstructedPredicates, 12 IntricatePredicates, 0 DeprecatedPredicates, 739 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=285, Invalid=4443, Unknown=12, NotChecked=1740, Total=6480 [2021-12-07 01:40:04,224 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 55 mSDsluCounter, 1047 mSDsCounter, 0 mSdLazyCounter, 2642 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 1077 SdHoareTripleChecker+Invalid, 3895 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 2642 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1235 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-07 01:40:04,224 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 1077 Invalid, 3895 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 2642 Invalid, 0 Unknown, 1235 Unchecked, 0.7s Time] [2021-12-07 01:40:04,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-12-07 01:40:04,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 112. [2021-12-07 01:40:04,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 110 states have (on average 1.0272727272727273) internal successors, (113), 111 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) [2021-12-07 01:40:04,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 113 transitions. [2021-12-07 01:40:04,226 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 113 transitions. Word has length 105 [2021-12-07 01:40:04,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:40:04,226 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 113 transitions. [2021-12-07 01:40:04,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 3.380952380952381) internal successors, (213), 63 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) [2021-12-07 01:40:04,227 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 113 transitions. [2021-12-07 01:40:04,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-12-07 01:40:04,227 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:40:04,227 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:40:04,258 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2021-12-07 01:40:04,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-12-07 01:40:04,427 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-07 01:40:04,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:40:04,428 INFO L85 PathProgramCache]: Analyzing trace with hash 1814081383, now seen corresponding path program 24 times [2021-12-07 01:40:04,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:40:04,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644029496] [2021-12-07 01:40:04,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:40:04,428 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:40:04,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:40:04,782 INFO L134 CoverageAnalysis]: Checked inductivity of 601 backedges. 231 proven. 370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:40:04,783 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:40:04,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644029496] [2021-12-07 01:40:04,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644029496] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:40:04,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671242415] [2021-12-07 01:40:04,783 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-07 01:40:04,783 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:40:04,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:40:04,784 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:40:04,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-12-07 01:40:06,944 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-12-07 01:40:06,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:40:06,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 535 conjuncts, 61 conjunts are in the unsatisfiable core [2021-12-07 01:40:06,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:40:07,432 INFO L134 CoverageAnalysis]: Checked inductivity of 601 backedges. 288 proven. 313 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:40:07,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:40:07,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-12-07 01:40:07,921 INFO L134 CoverageAnalysis]: Checked inductivity of 601 backedges. 288 proven. 313 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:40:07,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671242415] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:40:07,921 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:40:07,921 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 72 [2021-12-07 01:40:07,921 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695690188] [2021-12-07 01:40:07,921 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:40:07,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2021-12-07 01:40:07,922 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:40:07,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2021-12-07 01:40:07,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=806, Invalid=4450, Unknown=0, NotChecked=0, Total=5256 [2021-12-07 01:40:07,922 INFO L87 Difference]: Start difference. First operand 112 states and 113 transitions. Second operand has 73 states, 72 states have (on average 3.736111111111111) internal successors, (269), 73 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) [2021-12-07 01:40:08,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:40:08,435 INFO L93 Difference]: Finished difference Result 119 states and 120 transitions. [2021-12-07 01:40:08,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-07 01:40:08,435 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 72 states have (on average 3.736111111111111) internal successors, (269), 73 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) Word has length 109 [2021-12-07 01:40:08,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:40:08,436 INFO L225 Difference]: With dead ends: 119 [2021-12-07 01:40:08,436 INFO L226 Difference]: Without dead ends: 119 [2021-12-07 01:40:08,436 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2105 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1517, Invalid=6139, Unknown=0, NotChecked=0, Total=7656 [2021-12-07 01:40:08,436 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 512 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 1018 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 512 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 1169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 1018 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-07 01:40:08,437 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [512 Valid, 366 Invalid, 1169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 1018 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-07 01:40:08,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-12-07 01:40:08,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 115. [2021-12-07 01:40:08,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 113 states have (on average 1.0265486725663717) internal successors, (116), 114 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) [2021-12-07 01:40:08,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 116 transitions. [2021-12-07 01:40:08,438 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 116 transitions. Word has length 109 [2021-12-07 01:40:08,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:40:08,439 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 116 transitions. [2021-12-07 01:40:08,439 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 72 states have (on average 3.736111111111111) internal successors, (269), 73 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) [2021-12-07 01:40:08,439 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 116 transitions. [2021-12-07 01:40:08,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-12-07 01:40:08,439 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:40:08,439 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:40:08,460 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2021-12-07 01:40:08,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:40:08,640 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-07 01:40:08,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:40:08,641 INFO L85 PathProgramCache]: Analyzing trace with hash 401948012, now seen corresponding path program 9 times [2021-12-07 01:40:08,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:40:08,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2813856] [2021-12-07 01:40:08,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:40:08,642 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:40:08,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:40:09,004 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 231 proven. 382 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:40:09,004 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:40:09,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2813856] [2021-12-07 01:40:09,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2813856] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:40:09,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574256729] [2021-12-07 01:40:09,004 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-07 01:40:09,004 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:40:09,004 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:40:09,005 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:40:09,005 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-12-07 01:40:10,596 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-12-07 01:40:10,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:40:10,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 527 conjuncts, 104 conjunts are in the unsatisfiable core [2021-12-07 01:40:10,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:40:10,624 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 01:40:10,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-07 01:40:10,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-07 01:40:11,538 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 0 proven. 288 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2021-12-07 01:40:11,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:40:12,391 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 0 proven. 288 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2021-12-07 01:40:12,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574256729] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:40:12,391 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:40:12,391 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 17, 17] total 60 [2021-12-07 01:40:12,392 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196293444] [2021-12-07 01:40:12,392 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:40:12,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2021-12-07 01:40:12,392 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:40:12,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-12-07 01:40:12,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=480, Invalid=3180, Unknown=0, NotChecked=0, Total=3660 [2021-12-07 01:40:12,393 INFO L87 Difference]: Start difference. First operand 115 states and 116 transitions. Second operand has 61 states, 60 states have (on average 3.7666666666666666) internal successors, (226), 61 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:40:16,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:40:16,097 INFO L93 Difference]: Finished difference Result 176 states and 177 transitions. [2021-12-07 01:40:16,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-12-07 01:40:16,097 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 60 states have (on average 3.7666666666666666) internal successors, (226), 61 states have internal predecessors, (226), 0 states have call successors, (0), 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 110 [2021-12-07 01:40:16,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:40:16,098 INFO L225 Difference]: With dead ends: 176 [2021-12-07 01:40:16,098 INFO L226 Difference]: Without dead ends: 176 [2021-12-07 01:40:16,099 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2282 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=2290, Invalid=10142, Unknown=0, NotChecked=0, Total=12432 [2021-12-07 01:40:16,099 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 523 mSDsluCounter, 719 mSDsCounter, 0 mSdLazyCounter, 2087 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 523 SdHoareTripleChecker+Valid, 750 SdHoareTripleChecker+Invalid, 2296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 2087 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 74 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-07 01:40:16,099 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [523 Valid, 750 Invalid, 2296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 2087 Invalid, 0 Unknown, 74 Unchecked, 0.7s Time] [2021-12-07 01:40:16,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-12-07 01:40:16,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 164. [2021-12-07 01:40:16,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 162 states have (on average 1.0925925925925926) internal successors, (177), 163 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) [2021-12-07 01:40:16,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 177 transitions. [2021-12-07 01:40:16,102 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 177 transitions. Word has length 110 [2021-12-07 01:40:16,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:40:16,102 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 177 transitions. [2021-12-07 01:40:16,102 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 60 states have (on average 3.7666666666666666) internal successors, (226), 61 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:40:16,102 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 177 transitions. [2021-12-07 01:40:16,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-12-07 01:40:16,102 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:40:16,102 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:40:16,123 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-12-07 01:40:16,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:40:16,303 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-07 01:40:16,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:40:16,304 INFO L85 PathProgramCache]: Analyzing trace with hash 64398338, now seen corresponding path program 25 times [2021-12-07 01:40:16,305 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:40:16,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825152419] [2021-12-07 01:40:16,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:40:16,305 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:40:16,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:40:16,883 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 25 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:40:16,883 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:40:16,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825152419] [2021-12-07 01:40:16,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825152419] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:40:16,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597102682] [2021-12-07 01:40:16,883 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-07 01:40:16,883 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:40:16,883 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:40:16,884 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:40:16,884 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-12-07 01:40:17,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:40:17,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 140 conjunts are in the unsatisfiable core [2021-12-07 01:40:17,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:40:17,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-07 01:40:17,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-07 01:40:17,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-07 01:40:17,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-07 01:40:17,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-07 01:40:17,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-07 01:40:17,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-07 01:40:17,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-07 01:40:17,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-07 01:40:17,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-07 01:40:17,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-07 01:40:17,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-07 01:40:17,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-07 01:40:17,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-07 01:40:17,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-07 01:40:17,821 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 25 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:40:17,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:40:17,830 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2717 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_2717) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstpcpy_~from#1.offset| 1)) 0)) is different from false [2021-12-07 01:40:17,835 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2717 (Array Int Int))) (= 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_2717) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ 2 |c_ULTIMATE.start_cstpcpy_~from#1.offset|)))) is different from false [2021-12-07 01:40:17,844 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2717 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_2717) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ 3 |c_ULTIMATE.start_cstpcpy_~from#1.offset|)) 0)) is different from false [2021-12-07 01:40:17,851 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2717 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_2717) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstpcpy_~from#1.offset| 4)) 0)) is different from false [2021-12-07 01:40:17,858 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2717 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_2717) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ 5 |c_ULTIMATE.start_cstpcpy_~from#1.offset|)) 0)) is different from false [2021-12-07 01:40:17,865 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2717 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_2717) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ 6 |c_ULTIMATE.start_cstpcpy_~from#1.offset|)) 0)) is different from false [2021-12-07 01:40:17,872 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2717 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_2717) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ 7 |c_ULTIMATE.start_cstpcpy_~from#1.offset|)) 0)) is different from false [2021-12-07 01:40:17,879 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2717 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_2717) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstpcpy_~from#1.offset| 8)) 0)) is different from false [2021-12-07 01:40:17,886 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2717 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_2717) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ 9 |c_ULTIMATE.start_cstpcpy_~from#1.offset|)) 0)) is different from false [2021-12-07 01:40:17,893 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2717 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_2717) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstpcpy_~from#1.offset| 10)) 0)) is different from false [2021-12-07 01:40:17,899 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2717 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_2717) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstpcpy_~from#1.offset| 11)) 0)) is different from false [2021-12-07 01:40:17,907 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2717 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_2717) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstpcpy_~from#1.offset| 12)) 0)) is different from false [2021-12-07 01:40:17,914 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2717 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetArea~0#1.base| v_ArrVal_2717) |c_ULTIMATE.start_main_~nondetString~0#1.base|) (+ 12 |c_ULTIMATE.start_main_~nondetString~0#1.offset|)) 0)) is different from false [2021-12-07 01:40:17,917 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 01:40:17,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-07 01:40:17,921 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 01:40:17,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-12-07 01:40:17,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-07 01:40:18,183 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 25 proven. 326 refuted. 0 times theorem prover too weak. 0 trivial. 299 not checked. [2021-12-07 01:40:18,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597102682] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:40:18,183 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:40:18,183 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 34, 34] total 67 [2021-12-07 01:40:18,183 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200109693] [2021-12-07 01:40:18,183 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:40:18,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2021-12-07 01:40:18,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:40:18,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-12-07 01:40:18,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=2737, Unknown=13, NotChecked=1508, Total=4422 [2021-12-07 01:40:18,184 INFO L87 Difference]: Start difference. First operand 164 states and 177 transitions. Second operand has 67 states, 67 states have (on average 3.417910447761194) internal successors, (229), 67 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) [2021-12-07 01:40:19,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:40:19,678 INFO L93 Difference]: Finished difference Result 224 states and 237 transitions. [2021-12-07 01:40:19,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-12-07 01:40:19,678 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 3.417910447761194) internal successors, (229), 67 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 113 [2021-12-07 01:40:19,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:40:19,679 INFO L225 Difference]: With dead ends: 224 [2021-12-07 01:40:19,679 INFO L226 Difference]: Without dead ends: 171 [2021-12-07 01:40:19,680 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 201 SyntacticMatches, 15 SemanticMatches, 83 ConstructedPredicates, 13 IntricatePredicates, 0 DeprecatedPredicates, 791 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=284, Invalid=4867, Unknown=13, NotChecked=1976, Total=7140 [2021-12-07 01:40:19,680 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 49 mSDsluCounter, 1371 mSDsCounter, 0 mSdLazyCounter, 3460 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 1403 SdHoareTripleChecker+Invalid, 4950 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 3460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1471 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-07 01:40:19,680 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 1403 Invalid, 4950 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 3460 Invalid, 0 Unknown, 1471 Unchecked, 0.9s Time] [2021-12-07 01:40:19,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-12-07 01:40:19,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 168. [2021-12-07 01:40:19,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 166 states have (on average 1.0903614457831325) internal successors, (181), 167 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) [2021-12-07 01:40:19,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 181 transitions. [2021-12-07 01:40:19,682 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 181 transitions. Word has length 113 [2021-12-07 01:40:19,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:40:19,683 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 181 transitions. [2021-12-07 01:40:19,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 3.417910447761194) internal successors, (229), 67 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) [2021-12-07 01:40:19,683 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 181 transitions. [2021-12-07 01:40:19,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-12-07 01:40:19,683 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:40:19,683 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:40:19,703 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2021-12-07 01:40:19,884 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-12-07 01:40:19,884 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-07 01:40:19,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:40:19,884 INFO L85 PathProgramCache]: Analyzing trace with hash -1729146491, now seen corresponding path program 26 times [2021-12-07 01:40:19,885 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:40:19,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023893179] [2021-12-07 01:40:19,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:40:19,885 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:40:19,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:40:20,256 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 276 proven. 427 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:40:20,257 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:40:20,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023893179] [2021-12-07 01:40:20,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023893179] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:40:20,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218139094] [2021-12-07 01:40:20,257 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 01:40:20,257 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:40:20,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:40:20,258 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:40:20,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-12-07 01:40:20,377 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-07 01:40:20,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:40:20,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 572 conjuncts, 78 conjunts are in the unsatisfiable core [2021-12-07 01:40:20,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:40:20,781 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 325 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:40:20,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:40:21,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-07 01:40:21,279 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 325 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:40:21,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218139094] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:40:21,279 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:40:21,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 32, 32] total 65 [2021-12-07 01:40:21,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009564182] [2021-12-07 01:40:21,280 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:40:21,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2021-12-07 01:40:21,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:40:21,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-12-07 01:40:21,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=537, Invalid=3753, Unknown=0, NotChecked=0, Total=4290 [2021-12-07 01:40:21,281 INFO L87 Difference]: Start difference. First operand 168 states and 181 transitions. Second operand has 66 states, 65 states have (on average 3.6307692307692307) internal successors, (236), 66 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:40:22,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:40:22,022 INFO L93 Difference]: Finished difference Result 168 states and 180 transitions. [2021-12-07 01:40:22,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-07 01:40:22,023 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 65 states have (on average 3.6307692307692307) internal successors, (236), 66 states have internal predecessors, (236), 0 states have call successors, (0), 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 117 [2021-12-07 01:40:22,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:40:22,023 INFO L225 Difference]: With dead ends: 168 [2021-12-07 01:40:22,023 INFO L226 Difference]: Without dead ends: 168 [2021-12-07 01:40:22,024 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 197 SyntacticMatches, 2 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1764 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1233, Invalid=5409, Unknown=0, NotChecked=0, Total=6642 [2021-12-07 01:40:22,024 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 408 mSDsluCounter, 622 mSDsCounter, 0 mSdLazyCounter, 1839 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 408 SdHoareTripleChecker+Valid, 655 SdHoareTripleChecker+Invalid, 1961 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 1839 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-07 01:40:22,024 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [408 Valid, 655 Invalid, 1961 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 1839 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-07 01:40:22,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-12-07 01:40:22,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 168. [2021-12-07 01:40:22,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 166 states have (on average 1.0843373493975903) internal successors, (180), 167 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:40:22,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 180 transitions. [2021-12-07 01:40:22,026 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 180 transitions. Word has length 117 [2021-12-07 01:40:22,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:40:22,027 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 180 transitions. [2021-12-07 01:40:22,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 65 states have (on average 3.6307692307692307) internal successors, (236), 66 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:40:22,027 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 180 transitions. [2021-12-07 01:40:22,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-12-07 01:40:22,027 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:40:22,027 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:40:22,047 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2021-12-07 01:40:22,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:40:22,228 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-07 01:40:22,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:40:22,229 INFO L85 PathProgramCache]: Analyzing trace with hash 103483168, now seen corresponding path program 27 times [2021-12-07 01:40:22,229 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:40:22,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758445794] [2021-12-07 01:40:22,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:40:22,230 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:40:22,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:40:22,838 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 27 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:40:22,838 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:40:22,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758445794] [2021-12-07 01:40:22,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758445794] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:40:22,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964468782] [2021-12-07 01:40:22,838 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-07 01:40:22,838 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:40:22,838 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:40:22,839 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:40:22,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-12-07 01:40:25,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-12-07 01:40:25,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:40:26,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 595 conjuncts, 149 conjunts are in the unsatisfiable core [2021-12-07 01:40:26,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:40:26,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-07 01:40:26,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-07 01:40:26,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-07 01:40:26,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-07 01:40:26,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-07 01:40:26,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-07 01:40:26,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-07 01:40:26,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-07 01:40:26,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-07 01:40:26,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-07 01:40:26,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-07 01:40:26,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-07 01:40:26,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-07 01:40:26,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-07 01:40:26,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-07 01:40:26,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-07 01:40:26,778 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 27 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:40:26,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:40:26,787 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2982 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_2982) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstpcpy_~from#1.offset| 1)) 0)) is different from false [2021-12-07 01:40:26,791 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2982 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_2982) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ 2 |c_ULTIMATE.start_cstpcpy_~from#1.offset|)) 0)) is different from false [2021-12-07 01:40:26,800 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2982 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_2982) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ 3 |c_ULTIMATE.start_cstpcpy_~from#1.offset|)) 0)) is different from false [2021-12-07 01:40:26,808 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2982 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_2982) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstpcpy_~from#1.offset| 4)) 0)) is different from false [2021-12-07 01:40:26,816 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2982 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_2982) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ 5 |c_ULTIMATE.start_cstpcpy_~from#1.offset|)) 0)) is different from false [2021-12-07 01:40:26,824 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2982 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_2982) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ 6 |c_ULTIMATE.start_cstpcpy_~from#1.offset|)) 0)) is different from false [2021-12-07 01:40:26,832 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2982 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_2982) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ 7 |c_ULTIMATE.start_cstpcpy_~from#1.offset|)) 0)) is different from false [2021-12-07 01:40:26,840 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2982 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_2982) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstpcpy_~from#1.offset| 8)) 0)) is different from false [2021-12-07 01:40:26,848 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2982 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_2982) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ 9 |c_ULTIMATE.start_cstpcpy_~from#1.offset|)) 0)) is different from false [2021-12-07 01:40:26,856 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2982 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_2982) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstpcpy_~from#1.offset| 10)) 0)) is different from false [2021-12-07 01:40:26,864 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2982 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_2982) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstpcpy_~from#1.offset| 11)) 0)) is different from false [2021-12-07 01:40:26,871 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2982 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_2982) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstpcpy_~from#1.offset| 12)) 0)) is different from false [2021-12-07 01:40:26,878 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2982 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstpcpy_~to#1.base| v_ArrVal_2982) |c_ULTIMATE.start_cstpcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstpcpy_~from#1.offset| 13)) 0)) is different from false [2021-12-07 01:40:26,886 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2982 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetArea~0#1.base| v_ArrVal_2982) |c_ULTIMATE.start_main_~nondetString~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString~0#1.offset| 13)) 0)) is different from false [2021-12-07 01:40:26,889 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 01:40:26,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-07 01:40:26,893 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 01:40:26,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-12-07 01:40:26,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-07 01:40:27,168 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 27 proven. 379 refuted. 0 times theorem prover too weak. 0 trivial. 350 not checked. [2021-12-07 01:40:27,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964468782] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:40:27,169 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:40:27,169 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 36, 36] total 71 [2021-12-07 01:40:27,169 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117918824] [2021-12-07 01:40:27,169 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:40:27,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2021-12-07 01:40:27,169 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:40:27,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-12-07 01:40:27,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=3061, Unknown=14, NotChecked=1722, Total=4970 [2021-12-07 01:40:27,170 INFO L87 Difference]: Start difference. First operand 168 states and 180 transitions. Second operand has 71 states, 71 states have (on average 3.4507042253521125) internal successors, (245), 71 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:40:28,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:40:28,718 INFO L93 Difference]: Finished difference Result 232 states and 244 transitions. [2021-12-07 01:40:28,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-12-07 01:40:28,718 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 3.4507042253521125) internal successors, (245), 71 states have internal predecessors, (245), 0 states have call successors, (0), 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 [2021-12-07 01:40:28,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:40:28,719 INFO L225 Difference]: With dead ends: 232 [2021-12-07 01:40:28,719 INFO L226 Difference]: Without dead ends: 175 [2021-12-07 01:40:28,719 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 216 SyntacticMatches, 16 SemanticMatches, 88 ConstructedPredicates, 14 IntricatePredicates, 0 DeprecatedPredicates, 874 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=299, Invalid=5443, Unknown=14, NotChecked=2254, Total=8010 [2021-12-07 01:40:28,720 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 53 mSDsluCounter, 1462 mSDsCounter, 0 mSdLazyCounter, 3690 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 1496 SdHoareTripleChecker+Invalid, 5238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 3690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1528 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-07 01:40:28,720 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 1496 Invalid, 5238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 3690 Invalid, 0 Unknown, 1528 Unchecked, 0.9s Time] [2021-12-07 01:40:28,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-12-07 01:40:28,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 172. [2021-12-07 01:40:28,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 170 states have (on average 1.0823529411764705) internal successors, (184), 171 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:40:28,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 184 transitions. [2021-12-07 01:40:28,722 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 184 transitions. Word has length 121 [2021-12-07 01:40:28,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:40:28,722 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 184 transitions. [2021-12-07 01:40:28,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 3.4507042253521125) internal successors, (245), 71 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:40:28,723 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 184 transitions. [2021-12-07 01:40:28,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-12-07 01:40:28,723 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:40:28,723 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:40:28,745 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2021-12-07 01:40:28,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-12-07 01:40:28,924 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-07 01:40:28,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:40:28,924 INFO L85 PathProgramCache]: Analyzing trace with hash 558596515, now seen corresponding path program 28 times [2021-12-07 01:40:28,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:40:28,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701047764] [2021-12-07 01:40:28,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:40:28,924 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:40:28,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:40:29,292 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 325 proven. 488 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:40:29,292 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:40:29,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701047764] [2021-12-07 01:40:29,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701047764] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:40:29,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13404606] [2021-12-07 01:40:29,292 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-07 01:40:29,292 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:40:29,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:40:29,293 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:40:29,294 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-12-07 01:40:29,435 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-07 01:40:29,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:40:29,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 559 conjuncts, 82 conjunts are in the unsatisfiable core [2021-12-07 01:40:29,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:40:29,878 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 392 proven. 421 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:40:29,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:40:30,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-12-07 01:40:30,456 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 392 proven. 421 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:40:30,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13404606] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:40:30,456 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:40:30,456 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 33, 33] total 67 [2021-12-07 01:40:30,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754016107] [2021-12-07 01:40:30,457 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:40:30,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2021-12-07 01:40:30,457 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:40:30,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-12-07 01:40:30,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=476, Invalid=4080, Unknown=0, NotChecked=0, Total=4556 [2021-12-07 01:40:30,458 INFO L87 Difference]: Start difference. First operand 172 states and 184 transitions. Second operand has 68 states, 67 states have (on average 3.8208955223880596) internal successors, (256), 68 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:40:31,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:40:31,697 INFO L93 Difference]: Finished difference Result 172 states and 183 transitions. [2021-12-07 01:40:31,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-07 01:40:31,698 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 67 states have (on average 3.8208955223880596) internal successors, (256), 68 states have internal predecessors, (256), 0 states have call successors, (0), 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 [2021-12-07 01:40:31,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:40:31,698 INFO L225 Difference]: With dead ends: 172 [2021-12-07 01:40:31,699 INFO L226 Difference]: Without dead ends: 172 [2021-12-07 01:40:31,699 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1488 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1805, Invalid=7897, Unknown=0, NotChecked=0, Total=9702 [2021-12-07 01:40:31,699 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 484 mSDsluCounter, 681 mSDsCounter, 0 mSdLazyCounter, 2012 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 484 SdHoareTripleChecker+Valid, 716 SdHoareTripleChecker+Invalid, 2161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 2012 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-07 01:40:31,699 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [484 Valid, 716 Invalid, 2161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 2012 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-07 01:40:31,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-12-07 01:40:31,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 172. [2021-12-07 01:40:31,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 170 states have (on average 1.076470588235294) internal successors, (183), 171 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) [2021-12-07 01:40:31,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 183 transitions. [2021-12-07 01:40:31,702 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 183 transitions. Word has length 125 [2021-12-07 01:40:31,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:40:31,702 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 183 transitions. [2021-12-07 01:40:31,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 67 states have (on average 3.8208955223880596) internal successors, (256), 68 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:40:31,702 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 183 transitions. [2021-12-07 01:40:31,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-12-07 01:40:31,702 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:40:31,702 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:40:31,727 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-12-07 01:40:31,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:40:31,903 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-07 01:40:31,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:40:31,904 INFO L85 PathProgramCache]: Analyzing trace with hash -1500121026, now seen corresponding path program 29 times [2021-12-07 01:40:31,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:40:31,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552579124] [2021-12-07 01:40:31,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:40:31,905 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:40:31,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:40:32,545 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 29 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:40:32,546 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:40:32,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552579124] [2021-12-07 01:40:32,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552579124] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:40:32,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142667256] [2021-12-07 01:40:32,546 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-07 01:40:32,546 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:40:32,546 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:40:32,546 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:40:32,547 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-12-07 01:40:36,085 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-12-07 01:40:36,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:40:36,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 632 conjuncts, 122 conjunts are in the unsatisfiable core [2021-12-07 01:40:36,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:40:36,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-07 01:40:36,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-07 01:40:36,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-07 01:40:36,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-12-07 01:40:36,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-12-07 01:40:36,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-12-07 01:40:36,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-12-07 01:40:36,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-12-07 01:40:36,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-12-07 01:40:36,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-12-07 01:40:36,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-12-07 01:40:36,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-12-07 01:40:36,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-12-07 01:40:36,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-12-07 01:40:36,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-12-07 01:40:36,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-12-07 01:40:37,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-12-07 01:40:37,083 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 01:40:37,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-12-07 01:40:37,201 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 338 proven. 97 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2021-12-07 01:40:37,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:40:39,803 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 01:40:39,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 22 [2021-12-07 01:40:39,815 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 01:40:39,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 33 [2021-12-07 01:40:39,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-12-07 01:40:40,777 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 338 proven. 97 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2021-12-07 01:40:40,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142667256] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:40:40,777 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:40:40,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 22, 22] total 79 [2021-12-07 01:40:40,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434461652] [2021-12-07 01:40:40,778 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:40:40,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2021-12-07 01:40:40,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:40:40,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2021-12-07 01:40:40,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=585, Invalid=5562, Unknown=15, NotChecked=0, Total=6162 [2021-12-07 01:40:40,779 INFO L87 Difference]: Start difference. First operand 172 states and 183 transitions. Second operand has 79 states, 79 states have (on average 3.3797468354430378) internal successors, (267), 79 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) [2021-12-07 01:40:48,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:40:48,710 INFO L93 Difference]: Finished difference Result 236 states and 237 transitions. [2021-12-07 01:40:48,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2021-12-07 01:40:48,710 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 3.3797468354430378) internal successors, (267), 79 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) Word has length 129 [2021-12-07 01:40:48,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:40:48,711 INFO L225 Difference]: With dead ends: 236 [2021-12-07 01:40:48,711 INFO L226 Difference]: Without dead ends: 175 [2021-12-07 01:40:48,712 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 464 GetRequests, 256 SyntacticMatches, 5 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9093 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=5424, Invalid=36381, Unknown=15, NotChecked=0, Total=41820 [2021-12-07 01:40:48,713 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 147 mSDsluCounter, 897 mSDsCounter, 0 mSdLazyCounter, 4571 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 918 SdHoareTripleChecker+Invalid, 5092 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 4571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 356 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-07 01:40:48,713 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 918 Invalid, 5092 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 4571 Invalid, 0 Unknown, 356 Unchecked, 1.3s Time] [2021-12-07 01:40:48,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-12-07 01:40:48,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2021-12-07 01:40:48,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 1.0114942528735633) internal successors, (176), 174 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) [2021-12-07 01:40:48,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 176 transitions. [2021-12-07 01:40:48,715 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 176 transitions. Word has length 129 [2021-12-07 01:40:48,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:40:48,715 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 176 transitions. [2021-12-07 01:40:48,715 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 3.3797468354430378) internal successors, (267), 79 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) [2021-12-07 01:40:48,715 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 176 transitions. [2021-12-07 01:40:48,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2021-12-07 01:40:48,716 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:40:48,716 INFO L514 BasicCegarLoop]: trace histogram [26, 25, 25, 25, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:40:48,738 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-12-07 01:40:48,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-12-07 01:40:48,917 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-07 01:40:48,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:40:48,918 INFO L85 PathProgramCache]: Analyzing trace with hash -1300212348, now seen corresponding path program 10 times [2021-12-07 01:40:48,918 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:40:48,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306187538] [2021-12-07 01:40:48,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:40:48,919 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:40:49,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:40:49,480 INFO L134 CoverageAnalysis]: Checked inductivity of 1746 backedges. 1111 proven. 569 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-07 01:40:49,480 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:40:49,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306187538] [2021-12-07 01:40:49,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306187538] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:40:49,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8476373] [2021-12-07 01:40:49,480 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-07 01:40:49,480 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:40:49,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:40:49,481 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:40:49,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-12-07 01:40:49,635 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-07 01:40:49,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:40:49,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 829 conjuncts, 76 conjunts are in the unsatisfiable core [2021-12-07 01:40:49,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:40:49,651 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 01:40:49,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-07 01:40:50,723 INFO L134 CoverageAnalysis]: Checked inductivity of 1746 backedges. 1097 proven. 496 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-12-07 01:40:50,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:40:51,524 INFO L134 CoverageAnalysis]: Checked inductivity of 1746 backedges. 1081 proven. 512 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-12-07 01:40:51,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8476373] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:40:51,524 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:40:51,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 38, 38] total 95 [2021-12-07 01:40:51,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850093831] [2021-12-07 01:40:51,524 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:40:51,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2021-12-07 01:40:51,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:40:51,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2021-12-07 01:40:51,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1607, Invalid=7323, Unknown=0, NotChecked=0, Total=8930 [2021-12-07 01:40:51,526 INFO L87 Difference]: Start difference. First operand 175 states and 176 transitions. Second operand has 95 states, 95 states have (on average 3.768421052631579) internal successors, (358), 95 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:40:52,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:40:52,126 INFO L93 Difference]: Finished difference Result 249 states and 250 transitions. [2021-12-07 01:40:52,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-12-07 01:40:52,127 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 3.768421052631579) internal successors, (358), 95 states have internal predecessors, (358), 0 states have call successors, (0), 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 [2021-12-07 01:40:52,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:40:52,127 INFO L225 Difference]: With dead ends: 249 [2021-12-07 01:40:52,127 INFO L226 Difference]: Without dead ends: 182 [2021-12-07 01:40:52,128 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 405 GetRequests, 293 SyntacticMatches, 1 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3256 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2500, Invalid=10156, Unknown=0, NotChecked=0, Total=12656 [2021-12-07 01:40:52,128 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 202 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 903 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 903 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-07 01:40:52,129 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 322 Invalid, 929 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 903 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-07 01:40:52,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-12-07 01:40:52,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 179. [2021-12-07 01:40:52,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 1.0112359550561798) internal successors, (180), 178 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:40:52,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 180 transitions. [2021-12-07 01:40:52,131 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 180 transitions. Word has length 174 [2021-12-07 01:40:52,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:40:52,131 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 180 transitions. [2021-12-07 01:40:52,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 3.768421052631579) internal successors, (358), 95 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:40:52,131 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 180 transitions. [2021-12-07 01:40:52,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-12-07 01:40:52,131 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:40:52,132 INFO L514 BasicCegarLoop]: trace histogram [26, 25, 25, 25, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:40:52,151 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2021-12-07 01:40:52,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-12-07 01:40:52,333 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-07 01:40:52,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:40:52,334 INFO L85 PathProgramCache]: Analyzing trace with hash -1043732767, now seen corresponding path program 11 times [2021-12-07 01:40:52,334 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:40:52,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389450854] [2021-12-07 01:40:52,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:40:52,335 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:40:52,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:40:52,892 INFO L134 CoverageAnalysis]: Checked inductivity of 1811 backedges. 1090 proven. 630 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-12-07 01:40:52,893 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:40:52,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389450854] [2021-12-07 01:40:52,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389450854] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:40:52,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26626693] [2021-12-07 01:40:52,893 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-07 01:40:52,893 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:40:52,893 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:40:52,894 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:40:52,894 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-12-07 01:41:15,075 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 26 check-sat command(s) [2021-12-07 01:41:15,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:41:15,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 896 conjuncts, 92 conjunts are in the unsatisfiable core [2021-12-07 01:41:15,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:41:15,138 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 01:41:15,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-07 01:41:16,512 INFO L134 CoverageAnalysis]: Checked inductivity of 1811 backedges. 1205 proven. 561 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-07 01:41:16,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:41:17,579 INFO L134 CoverageAnalysis]: Checked inductivity of 1811 backedges. 1205 proven. 561 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-07 01:41:17,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26626693] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:41:17,579 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:41:17,580 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 42, 42] total 104 [2021-12-07 01:41:17,580 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189106115] [2021-12-07 01:41:17,580 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:41:17,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2021-12-07 01:41:17,580 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:41:17,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2021-12-07 01:41:17,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2088, Invalid=8624, Unknown=0, NotChecked=0, Total=10712 [2021-12-07 01:41:17,581 INFO L87 Difference]: Start difference. First operand 179 states and 180 transitions. Second operand has 104 states, 104 states have (on average 3.8076923076923075) internal successors, (396), 104 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:41:18,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:41:18,748 INFO L93 Difference]: Finished difference Result 349 states and 352 transitions. [2021-12-07 01:41:18,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-12-07 01:41:18,748 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 3.8076923076923075) internal successors, (396), 104 states have internal predecessors, (396), 0 states have call successors, (0), 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 178 [2021-12-07 01:41:18,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:41:18,749 INFO L225 Difference]: With dead ends: 349 [2021-12-07 01:41:18,749 INFO L226 Difference]: Without dead ends: 195 [2021-12-07 01:41:18,750 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 435 GetRequests, 292 SyntacticMatches, 1 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5002 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=4240, Invalid=16352, Unknown=0, NotChecked=0, Total=20592 [2021-12-07 01:41:18,750 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 189 mSDsluCounter, 368 mSDsCounter, 0 mSdLazyCounter, 1088 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 1129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1088 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-07 01:41:18,750 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 392 Invalid, 1129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1088 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-07 01:41:18,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-12-07 01:41:18,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2021-12-07 01:41:18,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 1.0103092783505154) internal successors, (196), 194 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:41:18,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 196 transitions. [2021-12-07 01:41:18,753 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 196 transitions. Word has length 178 [2021-12-07 01:41:18,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:41:18,753 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 196 transitions. [2021-12-07 01:41:18,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 3.8076923076923075) internal successors, (396), 104 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:41:18,754 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 196 transitions. [2021-12-07 01:41:18,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2021-12-07 01:41:18,754 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:41:18,754 INFO L514 BasicCegarLoop]: trace histogram [26, 25, 25, 25, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:41:18,782 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2021-12-07 01:41:18,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:41:18,955 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-07 01:41:18,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:41:18,957 INFO L85 PathProgramCache]: Analyzing trace with hash -2099967147, now seen corresponding path program 12 times [2021-12-07 01:41:18,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:41:18,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839022673] [2021-12-07 01:41:18,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:41:18,958 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:41:19,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:41:19,598 INFO L134 CoverageAnalysis]: Checked inductivity of 2111 backedges. 1141 proven. 942 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-07 01:41:19,598 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:41:19,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839022673] [2021-12-07 01:41:19,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839022673] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:41:19,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081893858] [2021-12-07 01:41:19,599 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-07 01:41:19,599 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:41:19,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:41:19,600 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:41:19,600 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-12-07 01:52:17,739 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2021-12-07 01:52:17,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:52:18,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 952 conjuncts, 210 conjunts are in the unsatisfiable core [2021-12-07 01:52:18,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:52:18,103 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 01:52:18,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-07 01:52:20,274 INFO L134 CoverageAnalysis]: Checked inductivity of 2111 backedges. 25 proven. 2086 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:52:20,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:52:24,965 INFO L134 CoverageAnalysis]: Checked inductivity of 2111 backedges. 0 proven. 2111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:52:24,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081893858] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:52:24,965 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:52:24,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 52, 52] total 149 [2021-12-07 01:52:24,966 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512111258] [2021-12-07 01:52:24,966 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:52:24,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 149 states [2021-12-07 01:52:24,970 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:52:24,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 149 interpolants. [2021-12-07 01:52:24,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3114, Invalid=18938, Unknown=0, NotChecked=0, Total=22052 [2021-12-07 01:52:24,971 INFO L87 Difference]: Start difference. First operand 195 states and 196 transitions. Second operand has 149 states, 149 states have (on average 3.7651006711409396) internal successors, (561), 149 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:52:29,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:52:29,021 INFO L93 Difference]: Finished difference Result 409 states and 414 transitions. [2021-12-07 01:52:29,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2021-12-07 01:52:29,021 INFO L78 Accepts]: Start accepts. Automaton has has 149 states, 149 states have (on average 3.7651006711409396) internal successors, (561), 149 states have internal predecessors, (561), 0 states have call successors, (0), 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 [2021-12-07 01:52:29,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:52:29,022 INFO L225 Difference]: With dead ends: 409 [2021-12-07 01:52:29,022 INFO L226 Difference]: Without dead ends: 322 [2021-12-07 01:52:29,024 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 506 GetRequests, 293 SyntacticMatches, 0 SemanticMatches, 213 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14239 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=5318, Invalid=40692, Unknown=0, NotChecked=0, Total=46010 [2021-12-07 01:52:29,024 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 280 mSDsluCounter, 1243 mSDsCounter, 0 mSdLazyCounter, 2818 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 1271 SdHoareTripleChecker+Invalid, 4365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 2818 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1505 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:52:29,024 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [280 Valid, 1271 Invalid, 4365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 2818 Invalid, 0 Unknown, 1505 Unchecked, 1.0s Time] [2021-12-07 01:52:29,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2021-12-07 01:52:29,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 221. [2021-12-07 01:52:29,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 1.0272727272727273) internal successors, (226), 220 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:52:29,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 226 transitions. [2021-12-07 01:52:29,027 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 226 transitions. Word has length 194 [2021-12-07 01:52:29,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:52:29,027 INFO L470 AbstractCegarLoop]: Abstraction has 221 states and 226 transitions. [2021-12-07 01:52:29,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 149 states, 149 states have (on average 3.7651006711409396) internal successors, (561), 149 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:52:29,027 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 226 transitions. [2021-12-07 01:52:29,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2021-12-07 01:52:29,028 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:52:29,028 INFO L514 BasicCegarLoop]: trace histogram [27, 26, 26, 26, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:52:29,103 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2021-12-07 01:52:29,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:52:29,229 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-07 01:52:29,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:52:29,230 INFO L85 PathProgramCache]: Analyzing trace with hash 359995383, now seen corresponding path program 13 times [2021-12-07 01:52:29,231 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:52:29,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702895998] [2021-12-07 01:52:29,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:52:29,231 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:52:29,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:52:29,989 INFO L134 CoverageAnalysis]: Checked inductivity of 2298 backedges. 1239 proven. 1031 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-07 01:52:29,989 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:52:29,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702895998] [2021-12-07 01:52:29,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702895998] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:52:29,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872083963] [2021-12-07 01:52:29,990 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-07 01:52:29,990 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:52:29,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:52:29,990 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:52:29,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-12-07 01:52:30,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:52:30,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 989 conjuncts, 100 conjunts are in the unsatisfiable core [2021-12-07 01:52:30,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:52:30,199 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 01:52:30,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-07 01:52:31,880 INFO L134 CoverageAnalysis]: Checked inductivity of 2298 backedges. 1324 proven. 946 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-07 01:52:31,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:52:33,113 INFO L134 CoverageAnalysis]: Checked inductivity of 2298 backedges. 1302 proven. 968 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-07 01:52:33,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872083963] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:52:33,114 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:52:33,114 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 122 [2021-12-07 01:52:33,114 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347215638] [2021-12-07 01:52:33,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:52:33,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 122 states [2021-12-07 01:52:33,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:52:33,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2021-12-07 01:52:33,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2708, Invalid=12054, Unknown=0, NotChecked=0, Total=14762 [2021-12-07 01:52:33,116 INFO L87 Difference]: Start difference. First operand 221 states and 226 transitions. Second operand has 122 states, 122 states have (on average 3.8114754098360657) internal successors, (465), 122 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:52:34,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:52:34,068 INFO L93 Difference]: Finished difference Result 312 states and 316 transitions. [2021-12-07 01:52:34,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-12-07 01:52:34,068 INFO L78 Accepts]: Start accepts. Automaton has has 122 states, 122 states have (on average 3.8114754098360657) internal successors, (465), 122 states have internal predecessors, (465), 0 states have call successors, (0), 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 202 [2021-12-07 01:52:34,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:52:34,069 INFO L225 Difference]: With dead ends: 312 [2021-12-07 01:52:34,069 INFO L226 Difference]: Without dead ends: 221 [2021-12-07 01:52:34,070 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 476 GetRequests, 331 SyntacticMatches, 1 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5352 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=4258, Invalid=16912, Unknown=0, NotChecked=0, Total=21170 [2021-12-07 01:52:34,070 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 117 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 1167 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 413 SdHoareTripleChecker+Invalid, 1188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-07 01:52:34,070 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 413 Invalid, 1188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1167 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-07 01:52:34,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-12-07 01:52:34,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 221. [2021-12-07 01:52:34,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 1.0227272727272727) internal successors, (225), 220 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) [2021-12-07 01:52:34,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 225 transitions. [2021-12-07 01:52:34,073 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 225 transitions. Word has length 202 [2021-12-07 01:52:34,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:52:34,073 INFO L470 AbstractCegarLoop]: Abstraction has 221 states and 225 transitions. [2021-12-07 01:52:34,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 122 states, 122 states have (on average 3.8114754098360657) internal successors, (465), 122 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:52:34,073 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 225 transitions. [2021-12-07 01:52:34,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2021-12-07 01:52:34,074 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:52:34,074 INFO L514 BasicCegarLoop]: trace histogram [27, 26, 26, 26, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:52:34,095 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2021-12-07 01:52:34,274 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:52:34,275 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-07 01:52:34,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:52:34,276 INFO L85 PathProgramCache]: Analyzing trace with hash 263269332, now seen corresponding path program 14 times [2021-12-07 01:52:34,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:52:34,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096093718] [2021-12-07 01:52:34,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:52:34,277 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:52:34,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:52:35,033 INFO L134 CoverageAnalysis]: Checked inductivity of 2387 backedges. 1248 proven. 1124 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-07 01:52:35,033 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:52:35,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096093718] [2021-12-07 01:52:35,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096093718] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:52:35,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084437303] [2021-12-07 01:52:35,033 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 01:52:35,033 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:52:35,033 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:52:35,034 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:52:35,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-12-07 01:52:35,230 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-07 01:52:35,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:52:35,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 1003 conjuncts, 113 conjunts are in the unsatisfiable core [2021-12-07 01:52:35,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:52:35,249 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 01:52:35,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-07 01:52:37,120 INFO L134 CoverageAnalysis]: Checked inductivity of 2387 backedges. 1352 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:52:37,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:52:38,658 INFO L134 CoverageAnalysis]: Checked inductivity of 2387 backedges. 1326 proven. 1061 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:52:38,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084437303] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:52:38,659 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:52:38,659 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 55, 55] total 135 [2021-12-07 01:52:38,659 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869147704] [2021-12-07 01:52:38,659 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:52:38,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 135 states [2021-12-07 01:52:38,659 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:52:38,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 135 interpolants. [2021-12-07 01:52:38,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3446, Invalid=14644, Unknown=0, NotChecked=0, Total=18090 [2021-12-07 01:52:38,661 INFO L87 Difference]: Start difference. First operand 221 states and 225 transitions. Second operand has 135 states, 135 states have (on average 3.785185185185185) internal successors, (511), 135 states have internal predecessors, (511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:52:40,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:52:40,572 INFO L93 Difference]: Finished difference Result 526 states and 529 transitions. [2021-12-07 01:52:40,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-12-07 01:52:40,572 INFO L78 Accepts]: Start accepts. Automaton has has 135 states, 135 states have (on average 3.785185185185185) internal successors, (511), 135 states have internal predecessors, (511), 0 states have call successors, (0), 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 206 [2021-12-07 01:52:40,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:52:40,573 INFO L225 Difference]: With dead ends: 526 [2021-12-07 01:52:40,574 INFO L226 Difference]: Without dead ends: 324 [2021-12-07 01:52:40,575 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 515 GetRequests, 328 SyntacticMatches, 1 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8637 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=7180, Invalid=27976, Unknown=0, NotChecked=0, Total=35156 [2021-12-07 01:52:40,575 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 154 mSDsluCounter, 509 mSDsCounter, 0 mSdLazyCounter, 1586 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 538 SdHoareTripleChecker+Invalid, 1638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 1586 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-07 01:52:40,575 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 538 Invalid, 1638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 1586 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-07 01:52:40,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2021-12-07 01:52:40,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 323. [2021-12-07 01:52:40,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 1.0093167701863355) internal successors, (325), 322 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:52:40,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 325 transitions. [2021-12-07 01:52:40,578 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 325 transitions. Word has length 206 [2021-12-07 01:52:40,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:52:40,578 INFO L470 AbstractCegarLoop]: Abstraction has 323 states and 325 transitions. [2021-12-07 01:52:40,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 135 states, 135 states have (on average 3.785185185185185) internal successors, (511), 135 states have internal predecessors, (511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:52:40,579 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 325 transitions. [2021-12-07 01:52:40,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2021-12-07 01:52:40,579 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:52:40,580 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:52:40,599 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2021-12-07 01:52:40,780 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-12-07 01:52:40,781 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-07 01:52:40,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:52:40,782 INFO L85 PathProgramCache]: Analyzing trace with hash 1335733926, now seen corresponding path program 15 times [2021-12-07 01:52:40,782 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:52:40,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711729296] [2021-12-07 01:52:40,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:52:40,783 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:52:40,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:52:41,711 INFO L134 CoverageAnalysis]: Checked inductivity of 2576 backedges. 1128 proven. 1448 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:52:41,711 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:52:41,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711729296] [2021-12-07 01:52:41,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711729296] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:52:41,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277572467] [2021-12-07 01:52:41,711 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-07 01:52:41,711 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:52:41,712 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:52:41,712 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:52:41,713 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1047c449-ae4f-43c3-b229-a708695fb906/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-12-07 01:53:25,303 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 26 check-sat command(s) [2021-12-07 01:53:25,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:53:25,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 1008 conjuncts, 184 conjunts are in the unsatisfiable core [2021-12-07 01:53:25,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:53:25,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-07 01:53:25,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-07 01:53:27,505 INFO L134 CoverageAnalysis]: Checked inductivity of 2576 backedges. 0 proven. 1250 refuted. 0 times theorem prover too weak. 1326 trivial. 0 not checked. [2021-12-07 01:53:27,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:53:29,816 INFO L134 CoverageAnalysis]: Checked inductivity of 2576 backedges. 0 proven. 1250 refuted. 0 times theorem prover too weak. 1326 trivial. 0 not checked. [2021-12-07 01:53:29,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277572467] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:53:29,816 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:53:29,817 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 30, 30] total 112 [2021-12-07 01:53:29,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547019091] [2021-12-07 01:53:29,817 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:53:29,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 113 states [2021-12-07 01:53:29,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:53:29,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2021-12-07 01:53:29,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1611, Invalid=11045, Unknown=0, NotChecked=0, Total=12656 [2021-12-07 01:53:29,818 INFO L87 Difference]: Start difference. First operand 323 states and 325 transitions. Second operand has 113 states, 112 states have (on average 3.875) internal successors, (434), 113 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)