./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety/test-0234-2.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_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/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_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety/test-0234-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/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_1980aaee-45ae-45cf-962c-28a00549fde8/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 3248e88e6fd49fdcf0a9f78f1aa9e69276951d353f75f39f6bb30d51b2e53989 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-07 01:08:10,064 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-07 01:08:10,065 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-07 01:08:10,086 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-07 01:08:10,087 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-07 01:08:10,088 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-07 01:08:10,089 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-07 01:08:10,091 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-07 01:08:10,092 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-07 01:08:10,093 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-07 01:08:10,094 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-07 01:08:10,095 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-07 01:08:10,095 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-07 01:08:10,096 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-07 01:08:10,097 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-07 01:08:10,098 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-07 01:08:10,099 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-07 01:08:10,100 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-07 01:08:10,102 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-07 01:08:10,103 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-07 01:08:10,105 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-07 01:08:10,106 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-07 01:08:10,107 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-07 01:08:10,108 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-07 01:08:10,110 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-07 01:08:10,111 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-07 01:08:10,111 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-07 01:08:10,112 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-07 01:08:10,112 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-07 01:08:10,113 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-07 01:08:10,113 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-07 01:08:10,114 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-07 01:08:10,115 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-07 01:08:10,115 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-07 01:08:10,116 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-07 01:08:10,116 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-07 01:08:10,117 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-07 01:08:10,117 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-07 01:08:10,117 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-07 01:08:10,118 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-07 01:08:10,119 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-07 01:08:10,120 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-07 01:08:10,143 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-07 01:08:10,143 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-07 01:08:10,143 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-07 01:08:10,144 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-07 01:08:10,144 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-07 01:08:10,144 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-07 01:08:10,145 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-07 01:08:10,145 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-07 01:08:10,145 INFO L138 SettingsManager]: * Use SBE=true [2021-12-07 01:08:10,146 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-07 01:08:10,146 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-07 01:08:10,146 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-07 01:08:10,146 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-07 01:08:10,146 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-07 01:08:10,146 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-07 01:08:10,147 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-07 01:08:10,147 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-07 01:08:10,147 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-07 01:08:10,147 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-07 01:08:10,147 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-07 01:08:10,147 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-07 01:08:10,148 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-07 01:08:10,148 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-07 01:08:10,148 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-07 01:08:10,148 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-07 01:08:10,148 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-07 01:08:10,148 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-07 01:08:10,149 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-07 01:08:10,149 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-07 01:08:10,149 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-07 01:08:10,149 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-07 01:08:10,149 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_1980aaee-45ae-45cf-962c-28a00549fde8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3248e88e6fd49fdcf0a9f78f1aa9e69276951d353f75f39f6bb30d51b2e53989 [2021-12-07 01:08:10,357 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-07 01:08:10,372 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-07 01:08:10,374 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-07 01:08:10,375 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-07 01:08:10,375 INFO L275 PluginConnector]: CDTParser initialized [2021-12-07 01:08:10,376 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/memsafety/test-0234-2.i [2021-12-07 01:08:10,417 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/data/f4b4b2d7d/1a5bcdd030944196bd3d88004d4fa033/FLAG34306a372 [2021-12-07 01:08:10,854 INFO L306 CDTParser]: Found 1 translation units. [2021-12-07 01:08:10,854 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/sv-benchmarks/c/memsafety/test-0234-2.i [2021-12-07 01:08:10,868 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/data/f4b4b2d7d/1a5bcdd030944196bd3d88004d4fa033/FLAG34306a372 [2021-12-07 01:08:10,880 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/data/f4b4b2d7d/1a5bcdd030944196bd3d88004d4fa033 [2021-12-07 01:08:10,883 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-07 01:08:10,884 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-07 01:08:10,886 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-07 01:08:10,886 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-07 01:08:10,888 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-07 01:08:10,889 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 01:08:10" (1/1) ... [2021-12-07 01:08:10,890 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d9eb045 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:08:10, skipping insertion in model container [2021-12-07 01:08:10,890 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 01:08:10" (1/1) ... [2021-12-07 01:08:10,895 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-07 01:08:10,929 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-07 01:08:11,174 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-07 01:08:11,180 INFO L203 MainTranslator]: Completed pre-run [2021-12-07 01:08:11,209 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-07 01:08:11,236 INFO L208 MainTranslator]: Completed translation [2021-12-07 01:08:11,237 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:08:11 WrapperNode [2021-12-07 01:08:11,237 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-07 01:08:11,238 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-07 01:08:11,238 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-07 01:08:11,238 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-07 01:08:11,243 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:08:11" (1/1) ... [2021-12-07 01:08:11,256 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:08:11" (1/1) ... [2021-12-07 01:08:11,277 INFO L137 Inliner]: procedures = 188, calls = 58, calls flagged for inlining = 14, calls inlined = 14, statements flattened = 197 [2021-12-07 01:08:11,277 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-07 01:08:11,278 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-07 01:08:11,278 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-07 01:08:11,278 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-07 01:08:11,284 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:08:11" (1/1) ... [2021-12-07 01:08:11,284 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:08:11" (1/1) ... [2021-12-07 01:08:11,288 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:08:11" (1/1) ... [2021-12-07 01:08:11,288 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:08:11" (1/1) ... [2021-12-07 01:08:11,296 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:08:11" (1/1) ... [2021-12-07 01:08:11,300 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:08:11" (1/1) ... [2021-12-07 01:08:11,302 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:08:11" (1/1) ... [2021-12-07 01:08:11,305 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-07 01:08:11,306 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-07 01:08:11,306 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-07 01:08:11,306 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-07 01:08:11,306 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:08:11" (1/1) ... [2021-12-07 01:08:11,314 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-07 01:08:11,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:08:11,334 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-07 01:08:11,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-07 01:08:11,362 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-07 01:08:11,363 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-07 01:08:11,363 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-07 01:08:11,363 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-07 01:08:11,363 INFO L130 BoogieDeclarations]: Found specification of procedure zalloc_or_die [2021-12-07 01:08:11,363 INFO L138 BoogieDeclarations]: Found implementation of procedure zalloc_or_die [2021-12-07 01:08:11,363 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-07 01:08:11,363 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-07 01:08:11,363 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-07 01:08:11,363 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-07 01:08:11,363 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-07 01:08:11,453 INFO L236 CfgBuilder]: Building ICFG [2021-12-07 01:08:11,455 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-07 01:08:11,785 INFO L277 CfgBuilder]: Performing block encoding [2021-12-07 01:08:11,791 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-07 01:08:11,791 INFO L301 CfgBuilder]: Removed 10 assume(true) statements. [2021-12-07 01:08:11,793 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 01:08:11 BoogieIcfgContainer [2021-12-07 01:08:11,793 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-07 01:08:11,794 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-07 01:08:11,795 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-07 01:08:11,797 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-07 01:08:11,797 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 01:08:10" (1/3) ... [2021-12-07 01:08:11,798 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34bf0952 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 01:08:11, skipping insertion in model container [2021-12-07 01:08:11,798 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:08:11" (2/3) ... [2021-12-07 01:08:11,798 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34bf0952 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 01:08:11, skipping insertion in model container [2021-12-07 01:08:11,798 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 01:08:11" (3/3) ... [2021-12-07 01:08:11,799 INFO L111 eAbstractionObserver]: Analyzing ICFG test-0234-2.i [2021-12-07 01:08:11,803 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-07 01:08:11,803 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 70 error locations. [2021-12-07 01:08:11,836 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-07 01:08:11,842 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 01:08:11,842 INFO L340 AbstractCegarLoop]: Starting to check reachability of 70 error locations. [2021-12-07 01:08:11,856 INFO L276 IsEmpty]: Start isEmpty. Operand has 182 states, 104 states have (on average 1.8846153846153846) internal successors, (196), 174 states have internal predecessors, (196), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-07 01:08:11,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-12-07 01:08:11,861 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:08:11,861 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-12-07 01:08:11,862 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr32REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-12-07 01:08:11,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:08:11,866 INFO L85 PathProgramCache]: Analyzing trace with hash 930118, now seen corresponding path program 1 times [2021-12-07 01:08:11,873 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:08:11,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515891960] [2021-12-07 01:08:11,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:08:11,874 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:08:11,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:08:11,966 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 01:08:11,967 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:08:11,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515891960] [2021-12-07 01:08:11,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515891960] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:08:11,967 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:08:11,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-07 01:08:11,969 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260893805] [2021-12-07 01:08:11,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:08:11,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-07 01:08:11,972 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:08:11,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-07 01:08:11,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-07 01:08:11,995 INFO L87 Difference]: Start difference. First operand has 182 states, 104 states have (on average 1.8846153846153846) internal successors, (196), 174 states have internal predecessors, (196), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:08:12,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:08:12,015 INFO L93 Difference]: Finished difference Result 182 states and 197 transitions. [2021-12-07 01:08:12,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-07 01:08:12,017 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 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 4 [2021-12-07 01:08:12,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:08:12,024 INFO L225 Difference]: With dead ends: 182 [2021-12-07 01:08:12,024 INFO L226 Difference]: Without dead ends: 180 [2021-12-07 01:08:12,025 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-07 01:08:12,028 INFO L933 BasicCegarLoop]: 197 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:08:12,029 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 01:08:12,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-12-07 01:08:12,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 180. [2021-12-07 01:08:12,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 103 states have (on average 1.7766990291262137) internal successors, (183), 172 states have internal predecessors, (183), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-07 01:08:12,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 195 transitions. [2021-12-07 01:08:12,064 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 195 transitions. Word has length 4 [2021-12-07 01:08:12,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:08:12,064 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 195 transitions. [2021-12-07 01:08:12,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:08:12,064 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 195 transitions. [2021-12-07 01:08:12,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-07 01:08:12,064 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:08:12,065 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-07 01:08:12,065 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-07 01:08:12,065 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting zalloc_or_dieErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-12-07 01:08:12,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:08:12,066 INFO L85 PathProgramCache]: Analyzing trace with hash 889833681, now seen corresponding path program 1 times [2021-12-07 01:08:12,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:08:12,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669232454] [2021-12-07 01:08:12,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:08:12,066 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:08:12,079 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 01:08:12,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [792082318] [2021-12-07 01:08:12,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:08:12,079 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:08:12,080 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:08:12,080 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:08:12,081 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-07 01:08:12,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:08:12,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-07 01:08:12,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:08:12,182 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-07 01:08:12,187 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 01:08:12,187 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:08:12,187 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:08:12,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669232454] [2021-12-07 01:08:12,187 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 01:08:12,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792082318] [2021-12-07 01:08:12,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792082318] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:08:12,188 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:08:12,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-07 01:08:12,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306838013] [2021-12-07 01:08:12,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:08:12,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 01:08:12,190 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:08:12,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 01:08:12,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:08:12,191 INFO L87 Difference]: Start difference. First operand 180 states and 195 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:08:12,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:08:12,292 INFO L93 Difference]: Finished difference Result 179 states and 194 transitions. [2021-12-07 01:08:12,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 01:08:12,293 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 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 01:08:12,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:08:12,295 INFO L225 Difference]: With dead ends: 179 [2021-12-07 01:08:12,295 INFO L226 Difference]: Without dead ends: 179 [2021-12-07 01:08:12,295 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 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 01:08:12,297 INFO L933 BasicCegarLoop]: 189 mSDtfsCounter, 9 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 01:08:12,297 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 302 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 01:08:12,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-12-07 01:08:12,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2021-12-07 01:08:12,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 103 states have (on average 1.766990291262136) internal successors, (182), 171 states have internal predecessors, (182), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-07 01:08:12,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 194 transitions. [2021-12-07 01:08:12,312 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 194 transitions. Word has length 6 [2021-12-07 01:08:12,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:08:12,312 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 194 transitions. [2021-12-07 01:08:12,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:08:12,313 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 194 transitions. [2021-12-07 01:08:12,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-07 01:08:12,313 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:08:12,313 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:08:12,334 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-07 01:08:12,514 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:08:12,515 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-12-07 01:08:12,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:08:12,518 INFO L85 PathProgramCache]: Analyzing trace with hash 1815040656, now seen corresponding path program 1 times [2021-12-07 01:08:12,518 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:08:12,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252962376] [2021-12-07 01:08:12,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:08:12,520 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:08:12,562 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 01:08:12,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1810503252] [2021-12-07 01:08:12,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:08:12,564 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:08:12,564 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:08:12,567 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:08:12,569 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-07 01:08:12,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:08:12,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-07 01:08:12,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:08:12,754 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-07 01:08:12,803 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 01:08:12,803 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:08:12,803 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:08:12,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252962376] [2021-12-07 01:08:12,804 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 01:08:12,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810503252] [2021-12-07 01:08:12,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810503252] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:08:12,804 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:08:12,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-07 01:08:12,804 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585954749] [2021-12-07 01:08:12,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:08:12,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 01:08:12,805 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:08:12,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 01:08:12,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:08:12,805 INFO L87 Difference]: Start difference. First operand 179 states and 194 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:08:12,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:08:12,811 INFO L93 Difference]: Finished difference Result 178 states and 193 transitions. [2021-12-07 01:08:12,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 01:08:12,811 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 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 01:08:12,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:08:12,812 INFO L225 Difference]: With dead ends: 178 [2021-12-07 01:08:12,812 INFO L226 Difference]: Without dead ends: 178 [2021-12-07 01:08:12,812 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 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 01:08:12,813 INFO L933 BasicCegarLoop]: 191 mSDtfsCounter, 0 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:08:12,814 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 325 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 58 Unchecked, 0.0s Time] [2021-12-07 01:08:12,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-12-07 01:08:12,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 178. [2021-12-07 01:08:12,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 103 states have (on average 1.7572815533980584) internal successors, (181), 170 states have internal predecessors, (181), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-07 01:08:12,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 193 transitions. [2021-12-07 01:08:12,823 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 193 transitions. Word has length 7 [2021-12-07 01:08:12,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:08:12,823 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 193 transitions. [2021-12-07 01:08:12,823 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:08:12,823 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 193 transitions. [2021-12-07 01:08:12,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-07 01:08:12,825 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:08:12,825 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:08:12,844 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-07 01:08:13,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:08:13,027 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-12-07 01:08:13,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:08:13,029 INFO L85 PathProgramCache]: Analyzing trace with hash -1487051478, now seen corresponding path program 1 times [2021-12-07 01:08:13,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:08:13,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892504045] [2021-12-07 01:08:13,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:08:13,031 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:08:13,096 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 01:08:13,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1538341468] [2021-12-07 01:08:13,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:08:13,098 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:08:13,098 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:08:13,101 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:08:13,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-07 01:08:13,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:08:13,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 533 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-07 01:08:13,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:08:13,487 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-07 01:08:13,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 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 12 treesize of output 14 [2021-12-07 01:08:13,499 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 69 proven. 8 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-12-07 01:08:13,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:08:13,687 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-07 01:08:13,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 11 [2021-12-07 01:08:13,735 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 69 proven. 8 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-12-07 01:08:13,735 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:08:13,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892504045] [2021-12-07 01:08:13,735 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 01:08:13,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538341468] [2021-12-07 01:08:13,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538341468] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:08:13,736 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:08:13,736 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 13 [2021-12-07 01:08:13,736 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567308389] [2021-12-07 01:08:13,736 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:08:13,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-07 01:08:13,737 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:08:13,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-07 01:08:13,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-12-07 01:08:13,738 INFO L87 Difference]: Start difference. First operand 178 states and 193 transitions. Second operand has 14 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 states have internal predecessors, (45), 2 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-07 01:08:22,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:08:22,094 INFO L93 Difference]: Finished difference Result 223 states and 243 transitions. [2021-12-07 01:08:22,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-07 01:08:22,095 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 states have internal predecessors, (45), 2 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 73 [2021-12-07 01:08:22,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:08:22,098 INFO L225 Difference]: With dead ends: 223 [2021-12-07 01:08:22,098 INFO L226 Difference]: Without dead ends: 223 [2021-12-07 01:08:22,099 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 132 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=120, Invalid=386, Unknown=0, NotChecked=0, Total=506 [2021-12-07 01:08:22,100 INFO L933 BasicCegarLoop]: 153 mSDtfsCounter, 125 mSDsluCounter, 1131 mSDsCounter, 0 mSdLazyCounter, 590 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 1284 SdHoareTripleChecker+Invalid, 893 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 300 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-07 01:08:22,100 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 1284 Invalid, 893 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 590 Invalid, 0 Unknown, 300 Unchecked, 0.2s Time] [2021-12-07 01:08:22,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-12-07 01:08:22,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 187. [2021-12-07 01:08:22,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 112 states have (on average 1.7053571428571428) internal successors, (191), 177 states have internal predecessors, (191), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2021-12-07 01:08:22,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 204 transitions. [2021-12-07 01:08:22,113 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 204 transitions. Word has length 73 [2021-12-07 01:08:22,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:08:22,114 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 204 transitions. [2021-12-07 01:08:22,114 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 states have internal predecessors, (45), 2 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-07 01:08:22,114 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 204 transitions. [2021-12-07 01:08:22,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-07 01:08:22,116 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:08:22,116 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:08:22,136 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-07 01:08:22,317 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:08:22,317 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-12-07 01:08:22,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:08:22,319 INFO L85 PathProgramCache]: Analyzing trace with hash -1487051477, now seen corresponding path program 1 times [2021-12-07 01:08:22,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:08:22,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623821959] [2021-12-07 01:08:22,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:08:22,321 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:08:22,366 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 01:08:22,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1845840435] [2021-12-07 01:08:22,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:08:22,367 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:08:22,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:08:22,368 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:08:22,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-07 01:08:22,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:08:22,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 533 conjuncts, 53 conjunts are in the unsatisfiable core [2021-12-07 01:08:22,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:08:22,540 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 0 case distinctions, treesize of input 8 treesize of output 7 [2021-12-07 01:08:22,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:08:22,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 21 treesize of output 21 [2021-12-07 01:08:22,959 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-07 01:08:22,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-07 01:08:22,986 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 69 proven. 8 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-12-07 01:08:22,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:08:23,064 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:08:23,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623821959] [2021-12-07 01:08:23,064 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 01:08:23,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845840435] [2021-12-07 01:08:23,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845840435] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:08:23,064 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-07 01:08:23,064 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-12-07 01:08:23,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776621457] [2021-12-07 01:08:23,065 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-07 01:08:23,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-07 01:08:23,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:08:23,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-07 01:08:23,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-12-07 01:08:23,066 INFO L87 Difference]: Start difference. First operand 187 states and 204 transitions. Second operand has 12 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-07 01:08:23,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:08:23,574 INFO L93 Difference]: Finished difference Result 186 states and 202 transitions. [2021-12-07 01:08:23,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-07 01:08:23,575 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 73 [2021-12-07 01:08:23,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:08:23,577 INFO L225 Difference]: With dead ends: 186 [2021-12-07 01:08:23,577 INFO L226 Difference]: Without dead ends: 186 [2021-12-07 01:08:23,577 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-12-07 01:08:23,578 INFO L933 BasicCegarLoop]: 176 mSDtfsCounter, 2 mSDsluCounter, 943 mSDsCounter, 0 mSdLazyCounter, 516 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1119 SdHoareTripleChecker+Invalid, 833 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 311 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-07 01:08:23,579 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1119 Invalid, 833 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 516 Invalid, 0 Unknown, 311 Unchecked, 0.3s Time] [2021-12-07 01:08:23,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-12-07 01:08:23,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 186. [2021-12-07 01:08:23,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 112 states have (on average 1.6875) internal successors, (189), 176 states have internal predecessors, (189), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2021-12-07 01:08:23,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 202 transitions. [2021-12-07 01:08:23,589 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 202 transitions. Word has length 73 [2021-12-07 01:08:23,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:08:23,590 INFO L470 AbstractCegarLoop]: Abstraction has 186 states and 202 transitions. [2021-12-07 01:08:23,590 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-07 01:08:23,590 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 202 transitions. [2021-12-07 01:08:23,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-12-07 01:08:23,593 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:08:23,593 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:08:23,614 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-07 01:08:23,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:08:23,794 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-12-07 01:08:23,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:08:23,794 INFO L85 PathProgramCache]: Analyzing trace with hash 120292531, now seen corresponding path program 1 times [2021-12-07 01:08:23,794 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:08:23,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692766122] [2021-12-07 01:08:23,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:08:23,795 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:08:23,811 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 01:08:23,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1215535657] [2021-12-07 01:08:23,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:08:23,812 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:08:23,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:08:23,813 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:08:23,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-07 01:08:23,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:08:23,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 548 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-07 01:08:23,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:08:24,079 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-07 01:08:24,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 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 12 treesize of output 14 [2021-12-07 01:08:24,089 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 73 proven. 9 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-12-07 01:08:24,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:08:24,248 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-07 01:08:24,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 11 [2021-12-07 01:08:24,286 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 73 proven. 9 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-12-07 01:08:24,287 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:08:24,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692766122] [2021-12-07 01:08:24,287 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 01:08:24,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215535657] [2021-12-07 01:08:24,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215535657] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:08:24,287 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:08:24,287 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 13 [2021-12-07 01:08:24,288 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413164253] [2021-12-07 01:08:24,288 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:08:24,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-07 01:08:24,288 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:08:24,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-07 01:08:24,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-12-07 01:08:24,289 INFO L87 Difference]: Start difference. First operand 186 states and 202 transitions. Second operand has 14 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 2 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-07 01:08:24,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:08:24,524 INFO L93 Difference]: Finished difference Result 220 states and 240 transitions. [2021-12-07 01:08:24,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-07 01:08:24,524 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 2 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 74 [2021-12-07 01:08:24,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:08:24,526 INFO L225 Difference]: With dead ends: 220 [2021-12-07 01:08:24,526 INFO L226 Difference]: Without dead ends: 220 [2021-12-07 01:08:24,526 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 134 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-12-07 01:08:24,527 INFO L933 BasicCegarLoop]: 146 mSDtfsCounter, 108 mSDsluCounter, 1126 mSDsCounter, 0 mSdLazyCounter, 554 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 1272 SdHoareTripleChecker+Invalid, 753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 193 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-07 01:08:24,527 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 1272 Invalid, 753 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 554 Invalid, 0 Unknown, 193 Unchecked, 0.2s Time] [2021-12-07 01:08:24,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-12-07 01:08:24,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 184. [2021-12-07 01:08:24,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 111 states have (on average 1.6846846846846846) internal successors, (187), 175 states have internal predecessors, (187), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2021-12-07 01:08:24,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 200 transitions. [2021-12-07 01:08:24,534 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 200 transitions. Word has length 74 [2021-12-07 01:08:24,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:08:24,534 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 200 transitions. [2021-12-07 01:08:24,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 2 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-07 01:08:24,535 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 200 transitions. [2021-12-07 01:08:24,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-12-07 01:08:24,537 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:08:24,537 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:08:24,568 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-07 01:08:24,737 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:08:24,738 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-12-07 01:08:24,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:08:24,738 INFO L85 PathProgramCache]: Analyzing trace with hash 1167639435, now seen corresponding path program 1 times [2021-12-07 01:08:24,738 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:08:24,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244930190] [2021-12-07 01:08:24,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:08:24,738 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:08:24,750 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 01:08:24,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [887952233] [2021-12-07 01:08:24,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:08:24,750 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:08:24,750 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:08:24,751 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:08:24,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-07 01:08:24,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:08:24,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 33 conjunts are in the unsatisfiable core [2021-12-07 01:08:24,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:08:24,975 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-07 01:08:24,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 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 12 treesize of output 14 [2021-12-07 01:08:25,034 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-07 01:08:25,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 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 12 treesize of output 14 [2021-12-07 01:08:25,044 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 80 proven. 16 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-12-07 01:08:25,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:08:25,264 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-07 01:08:25,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 11 [2021-12-07 01:08:25,291 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 80 proven. 16 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-12-07 01:08:25,291 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:08:25,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244930190] [2021-12-07 01:08:25,291 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 01:08:25,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887952233] [2021-12-07 01:08:25,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [887952233] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:08:25,291 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:08:25,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 14 [2021-12-07 01:08:25,292 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945346629] [2021-12-07 01:08:25,292 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:08:25,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-07 01:08:25,292 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:08:25,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-07 01:08:25,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-12-07 01:08:25,293 INFO L87 Difference]: Start difference. First operand 184 states and 200 transitions. Second operand has 15 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 2 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-07 01:08:33,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:08:33,627 INFO L93 Difference]: Finished difference Result 243 states and 267 transitions. [2021-12-07 01:08:33,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-07 01:08:33,627 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 2 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 75 [2021-12-07 01:08:33,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:08:33,629 INFO L225 Difference]: With dead ends: 243 [2021-12-07 01:08:33,629 INFO L226 Difference]: Without dead ends: 243 [2021-12-07 01:08:33,630 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 131 SyntacticMatches, 8 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=126, Invalid=474, Unknown=0, NotChecked=0, Total=600 [2021-12-07 01:08:33,630 INFO L933 BasicCegarLoop]: 152 mSDtfsCounter, 203 mSDsluCounter, 1078 mSDsCounter, 0 mSdLazyCounter, 664 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 1230 SdHoareTripleChecker+Invalid, 787 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 119 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-07 01:08:33,630 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 1230 Invalid, 787 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 664 Invalid, 0 Unknown, 119 Unchecked, 0.2s Time] [2021-12-07 01:08:33,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-12-07 01:08:33,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 208. [2021-12-07 01:08:33,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 132 states have (on average 1.5909090909090908) internal successors, (210), 195 states have internal predecessors, (210), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (11), 8 states have call predecessors, (11), 8 states have call successors, (11) [2021-12-07 01:08:33,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 229 transitions. [2021-12-07 01:08:33,637 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 229 transitions. Word has length 75 [2021-12-07 01:08:33,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:08:33,637 INFO L470 AbstractCegarLoop]: Abstraction has 208 states and 229 transitions. [2021-12-07 01:08:33,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 2 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-07 01:08:33,637 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 229 transitions. [2021-12-07 01:08:33,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-12-07 01:08:33,638 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:08:33,639 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:08:33,659 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-07 01:08:33,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:08:33,840 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-12-07 01:08:33,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:08:33,841 INFO L85 PathProgramCache]: Analyzing trace with hash 1167639436, now seen corresponding path program 1 times [2021-12-07 01:08:33,842 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:08:33,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868036558] [2021-12-07 01:08:33,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:08:33,843 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:08:33,883 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 01:08:33,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [267043563] [2021-12-07 01:08:33,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:08:33,884 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:08:33,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:08:33,885 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:08:33,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-07 01:08:33,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:08:33,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 73 conjunts are in the unsatisfiable core [2021-12-07 01:08:33,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:08:34,013 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 0 case distinctions, treesize of input 8 treesize of output 7 [2021-12-07 01:08:34,542 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-07 01:08:34,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-12-07 01:08:34,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 21 treesize of output 21 [2021-12-07 01:08:34,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:08:34,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2021-12-07 01:08:34,715 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-12-07 01:08:34,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2021-12-07 01:08:34,773 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 80 proven. 24 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-12-07 01:08:34,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:08:34,870 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:08:34,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868036558] [2021-12-07 01:08:34,870 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 01:08:34,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267043563] [2021-12-07 01:08:34,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267043563] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:08:34,870 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-07 01:08:34,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-12-07 01:08:34,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755959645] [2021-12-07 01:08:34,870 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-07 01:08:34,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-07 01:08:34,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:08:34,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-07 01:08:34,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-12-07 01:08:34,871 INFO L87 Difference]: Start difference. First operand 208 states and 229 transitions. Second operand has 16 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-07 01:08:35,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:08:35,551 INFO L93 Difference]: Finished difference Result 213 states and 236 transitions. [2021-12-07 01:08:35,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-07 01:08:35,551 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 75 [2021-12-07 01:08:35,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:08:35,553 INFO L225 Difference]: With dead ends: 213 [2021-12-07 01:08:35,553 INFO L226 Difference]: Without dead ends: 213 [2021-12-07 01:08:35,553 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-12-07 01:08:35,554 INFO L933 BasicCegarLoop]: 172 mSDtfsCounter, 3 mSDsluCounter, 1171 mSDsCounter, 0 mSdLazyCounter, 495 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 1343 SdHoareTripleChecker+Invalid, 1085 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 583 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-07 01:08:35,554 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 1343 Invalid, 1085 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 495 Invalid, 0 Unknown, 583 Unchecked, 0.4s Time] [2021-12-07 01:08:35,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-12-07 01:08:35,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 213. [2021-12-07 01:08:35,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 136 states have (on average 1.5735294117647058) internal successors, (214), 198 states have internal predecessors, (214), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (13), 10 states have call predecessors, (13), 9 states have call successors, (13) [2021-12-07 01:08:35,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 236 transitions. [2021-12-07 01:08:35,559 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 236 transitions. Word has length 75 [2021-12-07 01:08:35,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:08:35,560 INFO L470 AbstractCegarLoop]: Abstraction has 213 states and 236 transitions. [2021-12-07 01:08:35,560 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-07 01:08:35,560 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 236 transitions. [2021-12-07 01:08:35,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-12-07 01:08:35,561 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:08:35,561 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:08:35,583 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-07 01:08:35,762 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:08:35,763 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-12-07 01:08:35,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:08:35,764 INFO L85 PathProgramCache]: Analyzing trace with hash -866159368, now seen corresponding path program 1 times [2021-12-07 01:08:35,765 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:08:35,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034103443] [2021-12-07 01:08:35,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:08:35,766 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:08:35,806 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 01:08:35,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2017513606] [2021-12-07 01:08:35,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:08:35,807 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:08:35,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:08:35,808 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:08:35,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-07 01:08:35,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:08:35,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 565 conjuncts, 33 conjunts are in the unsatisfiable core [2021-12-07 01:08:35,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:08:36,018 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-07 01:08:36,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 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 12 treesize of output 14 [2021-12-07 01:08:36,081 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-07 01:08:36,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 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 12 treesize of output 14 [2021-12-07 01:08:36,091 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 83 proven. 17 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-12-07 01:08:36,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:08:36,312 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-07 01:08:36,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 11 [2021-12-07 01:08:36,338 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 83 proven. 17 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-12-07 01:08:36,338 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:08:36,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034103443] [2021-12-07 01:08:36,339 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 01:08:36,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017513606] [2021-12-07 01:08:36,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2017513606] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:08:36,339 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:08:36,339 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 14 [2021-12-07 01:08:36,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096840571] [2021-12-07 01:08:36,339 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:08:36,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-07 01:08:36,340 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:08:36,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-07 01:08:36,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-12-07 01:08:36,340 INFO L87 Difference]: Start difference. First operand 213 states and 236 transitions. Second operand has 15 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 2 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-07 01:08:44,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:08:44,663 INFO L93 Difference]: Finished difference Result 262 states and 288 transitions. [2021-12-07 01:08:44,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-07 01:08:44,663 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 2 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 76 [2021-12-07 01:08:44,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:08:44,665 INFO L225 Difference]: With dead ends: 262 [2021-12-07 01:08:44,665 INFO L226 Difference]: Without dead ends: 262 [2021-12-07 01:08:44,665 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 134 SyntacticMatches, 8 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=126, Invalid=474, Unknown=0, NotChecked=0, Total=600 [2021-12-07 01:08:44,666 INFO L933 BasicCegarLoop]: 153 mSDtfsCounter, 202 mSDsluCounter, 1197 mSDsCounter, 0 mSdLazyCounter, 656 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 1350 SdHoareTripleChecker+Invalid, 885 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 656 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 226 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-07 01:08:44,666 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 1350 Invalid, 885 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 656 Invalid, 0 Unknown, 226 Unchecked, 0.2s Time] [2021-12-07 01:08:44,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-12-07 01:08:44,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 214. [2021-12-07 01:08:44,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 137 states have (on average 1.5693430656934306) internal successors, (215), 201 states have internal predecessors, (215), 8 states have call successors, (8), 4 states have call predecessors, (8), 5 states have return successors, (11), 8 states have call predecessors, (11), 8 states have call successors, (11) [2021-12-07 01:08:44,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 234 transitions. [2021-12-07 01:08:44,672 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 234 transitions. Word has length 76 [2021-12-07 01:08:44,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:08:44,672 INFO L470 AbstractCegarLoop]: Abstraction has 214 states and 234 transitions. [2021-12-07 01:08:44,673 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 2 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-07 01:08:44,673 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 234 transitions. [2021-12-07 01:08:44,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-12-07 01:08:44,674 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:08:44,674 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:08:44,694 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-07 01:08:44,874 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-12-07 01:08:44,876 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-12-07 01:08:44,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:08:44,877 INFO L85 PathProgramCache]: Analyzing trace with hash 1837084129, now seen corresponding path program 1 times [2021-12-07 01:08:44,877 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:08:44,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072777558] [2021-12-07 01:08:44,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:08:44,878 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:08:44,916 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 01:08:44,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1383458959] [2021-12-07 01:08:44,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:08:44,917 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:08:44,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:08:44,918 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:08:44,921 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-07 01:08:45,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:08:45,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-07 01:08:45,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:08:45,101 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 32 proven. 8 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-12-07 01:08:45,101 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:08:45,121 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 01:08:45,195 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 32 proven. 8 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-12-07 01:08:45,195 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:08:45,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072777558] [2021-12-07 01:08:45,196 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 01:08:45,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383458959] [2021-12-07 01:08:45,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383458959] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:08:45,196 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:08:45,196 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-12-07 01:08:45,196 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044639665] [2021-12-07 01:08:45,196 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:08:45,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-07 01:08:45,197 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:08:45,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-07 01:08:45,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-12-07 01:08:45,197 INFO L87 Difference]: Start difference. First operand 214 states and 234 transitions. Second operand has 10 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-07 01:08:45,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:08:45,338 INFO L93 Difference]: Finished difference Result 232 states and 259 transitions. [2021-12-07 01:08:45,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-07 01:08:45,338 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 76 [2021-12-07 01:08:45,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:08:45,340 INFO L225 Difference]: With dead ends: 232 [2021-12-07 01:08:45,340 INFO L226 Difference]: Without dead ends: 232 [2021-12-07 01:08:45,340 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-12-07 01:08:45,341 INFO L933 BasicCegarLoop]: 154 mSDtfsCounter, 332 mSDsluCounter, 819 mSDsCounter, 0 mSdLazyCounter, 344 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 335 SdHoareTripleChecker+Valid, 973 SdHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 01:08:45,341 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [335 Valid, 973 Invalid, 348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 344 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 01:08:45,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-12-07 01:08:45,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 213. [2021-12-07 01:08:45,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 137 states have (on average 1.562043795620438) internal successors, (214), 200 states have internal predecessors, (214), 8 states have call successors, (8), 4 states have call predecessors, (8), 5 states have return successors, (11), 8 states have call predecessors, (11), 8 states have call successors, (11) [2021-12-07 01:08:45,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 233 transitions. [2021-12-07 01:08:45,347 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 233 transitions. Word has length 76 [2021-12-07 01:08:45,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:08:45,347 INFO L470 AbstractCegarLoop]: Abstraction has 213 states and 233 transitions. [2021-12-07 01:08:45,347 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-07 01:08:45,347 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 233 transitions. [2021-12-07 01:08:45,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-12-07 01:08:45,348 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:08:45,348 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:08:45,372 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-12-07 01:08:45,549 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-07 01:08:45,549 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-12-07 01:08:45,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:08:45,551 INFO L85 PathProgramCache]: Analyzing trace with hash 206288802, now seen corresponding path program 1 times [2021-12-07 01:08:45,551 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:08:45,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490760744] [2021-12-07 01:08:45,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:08:45,552 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:08:45,590 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 01:08:45,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1476894943] [2021-12-07 01:08:45,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:08:45,590 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:08:45,591 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:08:45,591 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:08:45,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-07 01:08:45,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:08:45,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 575 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-07 01:08:45,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:08:45,732 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2021-12-07 01:08:45,732 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:08:45,732 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:08:45,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490760744] [2021-12-07 01:08:45,732 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 01:08:45,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476894943] [2021-12-07 01:08:45,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1476894943] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:08:45,732 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:08:45,732 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-07 01:08:45,733 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54592713] [2021-12-07 01:08:45,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:08:45,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 01:08:45,733 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:08:45,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 01:08:45,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:08:45,733 INFO L87 Difference]: Start difference. First operand 213 states and 233 transitions. Second operand has 3 states, 2 states have (on average 13.0) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-07 01:08:45,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:08:45,792 INFO L93 Difference]: Finished difference Result 220 states and 244 transitions. [2021-12-07 01:08:45,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 01:08:45,793 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 13.0) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 78 [2021-12-07 01:08:45,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:08:45,794 INFO L225 Difference]: With dead ends: 220 [2021-12-07 01:08:45,794 INFO L226 Difference]: Without dead ends: 220 [2021-12-07 01:08:45,794 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 76 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 01:08:45,795 INFO L933 BasicCegarLoop]: 154 mSDtfsCounter, 151 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 01:08:45,795 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 184 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 01:08:45,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-12-07 01:08:45,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 212. [2021-12-07 01:08:45,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 137 states have (on average 1.5547445255474452) internal successors, (213), 199 states have internal predecessors, (213), 8 states have call successors, (8), 4 states have call predecessors, (8), 5 states have return successors, (11), 8 states have call predecessors, (11), 8 states have call successors, (11) [2021-12-07 01:08:45,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 232 transitions. [2021-12-07 01:08:45,800 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 232 transitions. Word has length 78 [2021-12-07 01:08:45,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:08:45,801 INFO L470 AbstractCegarLoop]: Abstraction has 212 states and 232 transitions. [2021-12-07 01:08:45,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 13.0) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-07 01:08:45,801 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 232 transitions. [2021-12-07 01:08:45,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-12-07 01:08:45,801 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:08:45,802 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:08:45,821 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-07 01:08:46,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-07 01:08:46,003 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-12-07 01:08:46,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:08:46,004 INFO L85 PathProgramCache]: Analyzing trace with hash 176026633, now seen corresponding path program 1 times [2021-12-07 01:08:46,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:08:46,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778457029] [2021-12-07 01:08:46,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:08:46,006 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:08:46,046 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 01:08:46,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [706371771] [2021-12-07 01:08:46,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:08:46,047 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:08:46,048 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:08:46,049 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:08:46,050 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-07 01:08:46,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:08:46,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 596 conjuncts, 40 conjunts are in the unsatisfiable core [2021-12-07 01:08:46,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:08:46,263 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-07 01:08:46,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-12-07 01:08:46,321 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-07 01:08:46,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-12-07 01:08:46,395 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-07 01:08:46,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 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 12 treesize of output 14 [2021-12-07 01:08:46,412 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 73 proven. 40 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-07 01:08:46,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:08:46,566 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:08:46,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778457029] [2021-12-07 01:08:46,566 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 01:08:46,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706371771] [2021-12-07 01:08:46,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706371771] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:08:46,566 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-07 01:08:46,566 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-12-07 01:08:46,567 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470376399] [2021-12-07 01:08:46,567 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-07 01:08:46,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-07 01:08:46,567 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:08:46,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-07 01:08:46,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-12-07 01:08:46,567 INFO L87 Difference]: Start difference. First operand 212 states and 232 transitions. Second operand has 14 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-07 01:08:50,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:08:50,941 INFO L93 Difference]: Finished difference Result 306 states and 340 transitions. [2021-12-07 01:08:50,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-07 01:08:50,941 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 82 [2021-12-07 01:08:50,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:08:50,943 INFO L225 Difference]: With dead ends: 306 [2021-12-07 01:08:50,943 INFO L226 Difference]: Without dead ends: 306 [2021-12-07 01:08:50,943 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 86 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=139, Invalid=563, Unknown=0, NotChecked=0, Total=702 [2021-12-07 01:08:50,944 INFO L933 BasicCegarLoop]: 147 mSDtfsCounter, 175 mSDsluCounter, 1161 mSDsCounter, 0 mSdLazyCounter, 660 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 1308 SdHoareTripleChecker+Invalid, 1000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 660 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 336 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-07 01:08:50,944 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 1308 Invalid, 1000 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 660 Invalid, 0 Unknown, 336 Unchecked, 0.2s Time] [2021-12-07 01:08:50,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2021-12-07 01:08:50,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 271. [2021-12-07 01:08:50,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 188 states have (on average 1.4414893617021276) internal successors, (271), 249 states have internal predecessors, (271), 13 states have call successors, (13), 8 states have call predecessors, (13), 9 states have return successors, (21), 13 states have call predecessors, (21), 13 states have call successors, (21) [2021-12-07 01:08:50,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 305 transitions. [2021-12-07 01:08:50,951 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 305 transitions. Word has length 82 [2021-12-07 01:08:50,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:08:50,952 INFO L470 AbstractCegarLoop]: Abstraction has 271 states and 305 transitions. [2021-12-07 01:08:50,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-07 01:08:50,952 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 305 transitions. [2021-12-07 01:08:50,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-12-07 01:08:50,952 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:08:50,953 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:08:50,986 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-12-07 01:08:51,153 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:08:51,154 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-12-07 01:08:51,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:08:51,155 INFO L85 PathProgramCache]: Analyzing trace with hash 176026634, now seen corresponding path program 1 times [2021-12-07 01:08:51,155 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:08:51,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682534449] [2021-12-07 01:08:51,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:08:51,156 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:08:51,192 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 01:08:51,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [402959549] [2021-12-07 01:08:51,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:08:51,193 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:08:51,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:08:51,194 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:08:51,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-07 01:08:51,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:08:51,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 596 conjuncts, 81 conjunts are in the unsatisfiable core [2021-12-07 01:08:51,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:08:51,385 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 0 case distinctions, treesize of input 8 treesize of output 7 [2021-12-07 01:08:51,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:08:51,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 21 treesize of output 21 [2021-12-07 01:08:51,931 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-07 01:08:51,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-12-07 01:08:52,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:08:52,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2021-12-07 01:08:52,163 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-12-07 01:08:52,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 33 [2021-12-07 01:08:52,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:08:52,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2021-12-07 01:08:52,328 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-12-07 01:08:52,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2021-12-07 01:08:52,464 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 73 proven. 48 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-07 01:08:52,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:08:52,597 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:08:52,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682534449] [2021-12-07 01:08:52,597 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 01:08:52,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402959549] [2021-12-07 01:08:52,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402959549] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:08:52,597 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-07 01:08:52,597 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-12-07 01:08:52,597 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061044894] [2021-12-07 01:08:52,597 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-07 01:08:52,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-07 01:08:52,598 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:08:52,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-07 01:08:52,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-12-07 01:08:52,598 INFO L87 Difference]: Start difference. First operand 271 states and 305 transitions. Second operand has 17 states, 15 states have (on average 4.133333333333334) internal successors, (62), 15 states have internal predecessors, (62), 3 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-07 01:08:53,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:08:53,275 INFO L93 Difference]: Finished difference Result 295 states and 337 transitions. [2021-12-07 01:08:53,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-07 01:08:53,276 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 4.133333333333334) internal successors, (62), 15 states have internal predecessors, (62), 3 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 82 [2021-12-07 01:08:53,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:08:53,277 INFO L225 Difference]: With dead ends: 295 [2021-12-07 01:08:53,277 INFO L226 Difference]: Without dead ends: 295 [2021-12-07 01:08:53,278 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2021-12-07 01:08:53,278 INFO L933 BasicCegarLoop]: 167 mSDtfsCounter, 7 mSDsluCounter, 1026 mSDsCounter, 0 mSdLazyCounter, 466 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 1193 SdHoareTripleChecker+Invalid, 854 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 380 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-07 01:08:53,278 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 1193 Invalid, 854 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 466 Invalid, 0 Unknown, 380 Unchecked, 0.4s Time] [2021-12-07 01:08:53,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2021-12-07 01:08:53,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 295. [2021-12-07 01:08:53,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 209 states have (on average 1.4114832535885167) internal successors, (295), 272 states have internal predecessors, (295), 14 states have call successors, (14), 9 states have call predecessors, (14), 11 states have return successors, (28), 13 states have call predecessors, (28), 14 states have call successors, (28) [2021-12-07 01:08:53,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 337 transitions. [2021-12-07 01:08:53,285 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 337 transitions. Word has length 82 [2021-12-07 01:08:53,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:08:53,286 INFO L470 AbstractCegarLoop]: Abstraction has 295 states and 337 transitions. [2021-12-07 01:08:53,286 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 4.133333333333334) internal successors, (62), 15 states have internal predecessors, (62), 3 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-07 01:08:53,286 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 337 transitions. [2021-12-07 01:08:53,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-07 01:08:53,287 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:08:53,287 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:08:53,307 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-12-07 01:08:53,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:08:53,488 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-12-07 01:08:53,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:08:53,489 INFO L85 PathProgramCache]: Analyzing trace with hash 1738443822, now seen corresponding path program 1 times [2021-12-07 01:08:53,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:08:53,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683512394] [2021-12-07 01:08:53,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:08:53,490 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:08:53,506 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 01:08:53,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1359133827] [2021-12-07 01:08:53,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:08:53,507 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:08:53,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:08:53,508 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:08:53,509 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-07 01:08:53,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:08:53,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 611 conjuncts, 52 conjunts are in the unsatisfiable core [2021-12-07 01:08:53,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:08:53,745 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-07 01:08:53,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-12-07 01:08:53,858 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-12-07 01:08:53,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 33 [2021-12-07 01:08:53,984 INFO L354 Elim1Store]: treesize reduction 28, result has 28.2 percent of original size [2021-12-07 01:08:53,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 22 [2021-12-07 01:08:54,033 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 75 proven. 51 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-07 01:08:54,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:08:54,206 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:08:54,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683512394] [2021-12-07 01:08:54,207 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 01:08:54,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359133827] [2021-12-07 01:08:54,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359133827] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:08:54,207 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-07 01:08:54,207 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-12-07 01:08:54,207 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197586819] [2021-12-07 01:08:54,207 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-07 01:08:54,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-07 01:08:54,207 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:08:54,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-07 01:08:54,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-12-07 01:08:54,208 INFO L87 Difference]: Start difference. First operand 295 states and 337 transitions. Second operand has 21 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 18 states have internal predecessors, (63), 3 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-07 01:08:54,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:08:54,472 INFO L93 Difference]: Finished difference Result 398 states and 457 transitions. [2021-12-07 01:08:54,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-07 01:08:54,473 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 18 states have internal predecessors, (63), 3 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 83 [2021-12-07 01:08:54,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:08:54,474 INFO L225 Difference]: With dead ends: 398 [2021-12-07 01:08:54,474 INFO L226 Difference]: Without dead ends: 398 [2021-12-07 01:08:54,475 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 81 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=126, Invalid=804, Unknown=0, NotChecked=0, Total=930 [2021-12-07 01:08:54,475 INFO L933 BasicCegarLoop]: 145 mSDtfsCounter, 161 mSDsluCounter, 1907 mSDsCounter, 0 mSdLazyCounter, 552 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 2052 SdHoareTripleChecker+Invalid, 1123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 564 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-07 01:08:54,475 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 2052 Invalid, 1123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 552 Invalid, 0 Unknown, 564 Unchecked, 0.2s Time] [2021-12-07 01:08:54,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2021-12-07 01:08:54,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 364. [2021-12-07 01:08:54,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 268 states have (on average 1.3544776119402986) internal successors, (363), 332 states have internal predecessors, (363), 18 states have call successors, (18), 13 states have call predecessors, (18), 17 states have return successors, (36), 18 states have call predecessors, (36), 18 states have call successors, (36) [2021-12-07 01:08:54,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 417 transitions. [2021-12-07 01:08:54,484 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 417 transitions. Word has length 83 [2021-12-07 01:08:54,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:08:54,484 INFO L470 AbstractCegarLoop]: Abstraction has 364 states and 417 transitions. [2021-12-07 01:08:54,485 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 18 states have internal predecessors, (63), 3 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-07 01:08:54,485 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 417 transitions. [2021-12-07 01:08:54,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-07 01:08:54,485 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:08:54,485 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:08:54,505 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-12-07 01:08:54,686 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-07 01:08:54,686 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-12-07 01:08:54,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:08:54,687 INFO L85 PathProgramCache]: Analyzing trace with hash 1738443823, now seen corresponding path program 1 times [2021-12-07 01:08:54,687 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:08:54,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445335935] [2021-12-07 01:08:54,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:08:54,687 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:08:54,700 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 01:08:54,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [538631176] [2021-12-07 01:08:54,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:08:54,700 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:08:54,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:08:54,701 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:08:54,702 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-07 01:08:54,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:08:54,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 611 conjuncts, 96 conjunts are in the unsatisfiable core [2021-12-07 01:08:54,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:08:54,928 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 0 case distinctions, treesize of input 8 treesize of output 7 [2021-12-07 01:08:55,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:08:55,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 21 treesize of output 21 [2021-12-07 01:08:55,570 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-07 01:08:55,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-12-07 01:08:55,841 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 01:08:55,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 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 25 [2021-12-07 01:08:55,901 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-12-07 01:08:55,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 33 [2021-12-07 01:08:56,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:08:56,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2021-12-07 01:08:56,105 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-12-07 01:08:56,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2021-12-07 01:08:56,253 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 70 proven. 57 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-07 01:08:56,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:08:56,391 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:08:56,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445335935] [2021-12-07 01:08:56,391 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 01:08:56,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538631176] [2021-12-07 01:08:56,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [538631176] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:08:56,392 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-07 01:08:56,392 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2021-12-07 01:08:56,392 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256704416] [2021-12-07 01:08:56,392 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-07 01:08:56,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-07 01:08:56,392 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:08:56,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-07 01:08:56,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-12-07 01:08:56,393 INFO L87 Difference]: Start difference. First operand 364 states and 417 transitions. Second operand has 22 states, 20 states have (on average 3.25) internal successors, (65), 19 states have internal predecessors, (65), 3 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-07 01:08:57,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:08:57,677 INFO L93 Difference]: Finished difference Result 470 states and 539 transitions. [2021-12-07 01:08:57,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-07 01:08:57,677 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 3.25) internal successors, (65), 19 states have internal predecessors, (65), 3 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 83 [2021-12-07 01:08:57,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:08:57,679 INFO L225 Difference]: With dead ends: 470 [2021-12-07 01:08:57,679 INFO L226 Difference]: Without dead ends: 470 [2021-12-07 01:08:57,680 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=115, Invalid=877, Unknown=0, NotChecked=0, Total=992 [2021-12-07 01:08:57,680 INFO L933 BasicCegarLoop]: 164 mSDtfsCounter, 6 mSDsluCounter, 1470 mSDsCounter, 0 mSdLazyCounter, 469 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 1634 SdHoareTripleChecker+Invalid, 1239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 763 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-07 01:08:57,680 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 1634 Invalid, 1239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 469 Invalid, 0 Unknown, 763 Unchecked, 0.5s Time] [2021-12-07 01:08:57,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2021-12-07 01:08:57,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 380. [2021-12-07 01:08:57,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 280 states have (on average 1.3357142857142856) internal successors, (374), 343 states have internal predecessors, (374), 20 states have call successors, (20), 15 states have call predecessors, (20), 19 states have return successors, (36), 21 states have call predecessors, (36), 20 states have call successors, (36) [2021-12-07 01:08:57,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 430 transitions. [2021-12-07 01:08:57,690 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 430 transitions. Word has length 83 [2021-12-07 01:08:57,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:08:57,690 INFO L470 AbstractCegarLoop]: Abstraction has 380 states and 430 transitions. [2021-12-07 01:08:57,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 3.25) internal successors, (65), 19 states have internal predecessors, (65), 3 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-07 01:08:57,690 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 430 transitions. [2021-12-07 01:08:57,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-07 01:08:57,691 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:08:57,691 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:08:57,726 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-12-07 01:08:57,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-07 01:08:57,892 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-12-07 01:08:57,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:08:57,892 INFO L85 PathProgramCache]: Analyzing trace with hash 1675509245, now seen corresponding path program 2 times [2021-12-07 01:08:57,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:08:57,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192626022] [2021-12-07 01:08:57,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:08:57,892 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:08:57,902 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 01:08:57,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [397155644] [2021-12-07 01:08:57,903 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 01:08:57,903 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:08:57,903 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:08:57,903 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:08:57,904 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-07 01:08:58,037 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-07 01:08:58,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:08:58,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 611 conjuncts, 105 conjunts are in the unsatisfiable core [2021-12-07 01:08:58,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:08:58,069 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 0 case distinctions, treesize of input 8 treesize of output 7 [2021-12-07 01:08:58,853 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-07 01:08:58,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-12-07 01:08:58,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 21 treesize of output 21 [2021-12-07 01:08:59,385 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 01:08:59,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 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 25 [2021-12-07 01:08:59,443 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-12-07 01:08:59,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 33 [2021-12-07 01:08:59,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:08:59,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2021-12-07 01:08:59,683 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-12-07 01:08:59,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2021-12-07 01:08:59,842 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 75 proven. 51 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-07 01:08:59,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:09:00,007 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:09:00,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192626022] [2021-12-07 01:09:00,007 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 01:09:00,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397155644] [2021-12-07 01:09:00,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397155644] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:09:00,008 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-07 01:09:00,008 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2021-12-07 01:09:00,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817787445] [2021-12-07 01:09:00,008 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-07 01:09:00,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-07 01:09:00,008 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:09:00,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-07 01:09:00,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=666, Unknown=0, NotChecked=0, Total=756 [2021-12-07 01:09:00,009 INFO L87 Difference]: Start difference. First operand 380 states and 430 transitions. Second operand has 26 states, 23 states have (on average 2.739130434782609) internal successors, (63), 22 states have internal predecessors, (63), 3 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-07 01:09:01,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:09:01,024 INFO L93 Difference]: Finished difference Result 388 states and 439 transitions. [2021-12-07 01:09:01,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-07 01:09:01,024 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 23 states have (on average 2.739130434782609) internal successors, (63), 22 states have internal predecessors, (63), 3 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 83 [2021-12-07 01:09:01,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:09:01,026 INFO L225 Difference]: With dead ends: 388 [2021-12-07 01:09:01,026 INFO L226 Difference]: Without dead ends: 388 [2021-12-07 01:09:01,027 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=123, Invalid=933, Unknown=0, NotChecked=0, Total=1056 [2021-12-07 01:09:01,027 INFO L933 BasicCegarLoop]: 164 mSDtfsCounter, 4 mSDsluCounter, 1187 mSDsCounter, 0 mSdLazyCounter, 465 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 1351 SdHoareTripleChecker+Invalid, 1079 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 607 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-07 01:09:01,027 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 1351 Invalid, 1079 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 465 Invalid, 0 Unknown, 607 Unchecked, 0.6s Time] [2021-12-07 01:09:01,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2021-12-07 01:09:01,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 332. [2021-12-07 01:09:01,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 241 states have (on average 1.3734439834024896) internal successors, (331), 304 states have internal predecessors, (331), 15 states have call successors, (15), 12 states have call predecessors, (15), 15 states have return successors, (25), 15 states have call predecessors, (25), 15 states have call successors, (25) [2021-12-07 01:09:01,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 371 transitions. [2021-12-07 01:09:01,034 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 371 transitions. Word has length 83 [2021-12-07 01:09:01,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:09:01,035 INFO L470 AbstractCegarLoop]: Abstraction has 332 states and 371 transitions. [2021-12-07 01:09:01,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 23 states have (on average 2.739130434782609) internal successors, (63), 22 states have internal predecessors, (63), 3 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-07 01:09:01,035 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 371 transitions. [2021-12-07 01:09:01,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-07 01:09:01,036 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:09:01,036 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:09:01,056 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-12-07 01:09:01,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-07 01:09:01,237 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-12-07 01:09:01,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:09:01,238 INFO L85 PathProgramCache]: Analyzing trace with hash 1161858360, now seen corresponding path program 1 times [2021-12-07 01:09:01,239 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:09:01,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191927686] [2021-12-07 01:09:01,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:09:01,239 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:09:01,257 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 01:09:01,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [659059519] [2021-12-07 01:09:01,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:09:01,258 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:09:01,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:09:01,259 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:09:01,261 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-07 01:09:01,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:09:01,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 604 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-07 01:09:01,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:09:01,520 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2021-12-07 01:09:01,520 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:09:01,520 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:09:01,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191927686] [2021-12-07 01:09:01,520 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 01:09:01,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659059519] [2021-12-07 01:09:01,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659059519] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:09:01,521 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:09:01,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 01:09:01,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462027178] [2021-12-07 01:09:01,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:09:01,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-07 01:09:01,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:09:01,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-07 01:09:01,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-07 01:09:01,522 INFO L87 Difference]: Start difference. First operand 332 states and 371 transitions. Second operand has 4 states, 3 states have (on average 10.333333333333334) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-07 01:09:01,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:09:01,623 INFO L93 Difference]: Finished difference Result 373 states and 422 transitions. [2021-12-07 01:09:01,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-07 01:09:01,623 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 10.333333333333334) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 83 [2021-12-07 01:09:01,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:09:01,625 INFO L225 Difference]: With dead ends: 373 [2021-12-07 01:09:01,625 INFO L226 Difference]: Without dead ends: 373 [2021-12-07 01:09:01,625 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 81 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 01:09:01,626 INFO L933 BasicCegarLoop]: 160 mSDtfsCounter, 269 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 01:09:01,626 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [271 Valid, 273 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 01:09:01,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2021-12-07 01:09:01,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 331. [2021-12-07 01:09:01,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 241 states have (on average 1.3692946058091287) internal successors, (330), 303 states have internal predecessors, (330), 15 states have call successors, (15), 12 states have call predecessors, (15), 15 states have return successors, (25), 15 states have call predecessors, (25), 15 states have call successors, (25) [2021-12-07 01:09:01,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 370 transitions. [2021-12-07 01:09:01,633 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 370 transitions. Word has length 83 [2021-12-07 01:09:01,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:09:01,633 INFO L470 AbstractCegarLoop]: Abstraction has 331 states and 370 transitions. [2021-12-07 01:09:01,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 10.333333333333334) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-07 01:09:01,633 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 370 transitions. [2021-12-07 01:09:01,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-07 01:09:01,634 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:09:01,634 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:09:01,654 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2021-12-07 01:09:01,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-07 01:09:01,835 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-12-07 01:09:01,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:09:01,837 INFO L85 PathProgramCache]: Analyzing trace with hash 1161858361, now seen corresponding path program 1 times [2021-12-07 01:09:01,837 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:09:01,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655167719] [2021-12-07 01:09:01,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:09:01,838 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:09:01,873 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 01:09:01,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [197358841] [2021-12-07 01:09:01,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:09:01,874 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:09:01,874 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:09:01,876 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:09:01,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-07 01:09:02,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:09:02,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 604 conjuncts, 83 conjunts are in the unsatisfiable core [2021-12-07 01:09:02,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:09:02,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 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 12 treesize of output 9 [2021-12-07 01:09:02,126 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-07 01:09:02,135 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 0 case distinctions, treesize of input 10 treesize of output 9 [2021-12-07 01:09:05,063 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-07 01:09:05,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-12-07 01:09:05,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 20 treesize of output 22 [2021-12-07 01:09:05,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:09:05,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 20 treesize of output 22 [2021-12-07 01:09:05,939 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-07 01:09:05,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-12-07 01:09:07,108 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 01:09:08,273 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 80 proven. 24 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-12-07 01:09:08,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:09:08,597 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:09:08,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655167719] [2021-12-07 01:09:08,597 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 01:09:08,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197358841] [2021-12-07 01:09:08,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197358841] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:09:08,597 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-07 01:09:08,597 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-12-07 01:09:08,597 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237450799] [2021-12-07 01:09:08,597 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-07 01:09:08,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-07 01:09:08,598 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:09:08,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-07 01:09:08,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=448, Unknown=0, NotChecked=0, Total=506 [2021-12-07 01:09:08,598 INFO L87 Difference]: Start difference. First operand 331 states and 370 transitions. Second operand has 20 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 17 states have internal predecessors, (55), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-07 01:09:09,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:09:09,256 INFO L93 Difference]: Finished difference Result 398 states and 455 transitions. [2021-12-07 01:09:09,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-07 01:09:09,257 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 17 states have internal predecessors, (55), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) Word has length 83 [2021-12-07 01:09:09,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:09:09,258 INFO L225 Difference]: With dead ends: 398 [2021-12-07 01:09:09,258 INFO L226 Difference]: Without dead ends: 398 [2021-12-07 01:09:09,259 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=95, Invalid=775, Unknown=0, NotChecked=0, Total=870 [2021-12-07 01:09:09,259 INFO L933 BasicCegarLoop]: 169 mSDtfsCounter, 3 mSDsluCounter, 1316 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 1485 SdHoareTripleChecker+Invalid, 1191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1106 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 01:09:09,259 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 1485 Invalid, 1191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 79 Invalid, 0 Unknown, 1106 Unchecked, 0.1s Time] [2021-12-07 01:09:09,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2021-12-07 01:09:09,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 383. [2021-12-07 01:09:09,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 285 states have (on average 1.3368421052631578) internal successors, (381), 348 states have internal predecessors, (381), 20 states have call successors, (20), 12 states have call predecessors, (20), 18 states have return successors, (38), 22 states have call predecessors, (38), 20 states have call successors, (38) [2021-12-07 01:09:09,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 439 transitions. [2021-12-07 01:09:09,267 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 439 transitions. Word has length 83 [2021-12-07 01:09:09,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:09:09,267 INFO L470 AbstractCegarLoop]: Abstraction has 383 states and 439 transitions. [2021-12-07 01:09:09,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 17 states have internal predecessors, (55), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-07 01:09:09,267 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 439 transitions. [2021-12-07 01:09:09,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-12-07 01:09:09,268 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:09:09,268 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:09:09,289 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-12-07 01:09:09,469 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:09:09,470 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-12-07 01:09:09,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:09:09,472 INFO L85 PathProgramCache]: Analyzing trace with hash -1942816332, now seen corresponding path program 1 times [2021-12-07 01:09:09,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:09:09,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267417243] [2021-12-07 01:09:09,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:09:09,473 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:09:09,485 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 01:09:09,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1436614934] [2021-12-07 01:09:09,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:09:09,486 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:09:09,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:09:09,486 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:09:09,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-07 01:09:09,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:09:09,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 619 conjuncts, 77 conjunts are in the unsatisfiable core [2021-12-07 01:09:09,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:09:09,666 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-07 01:09:09,676 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 0 case distinctions, treesize of input 10 treesize of output 9 [2021-12-07 01:09:11,079 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-07 01:09:11,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-12-07 01:09:11,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 20 treesize of output 22 [2021-12-07 01:09:11,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:09:11,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2021-12-07 01:09:11,643 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-12-07 01:09:11,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2021-12-07 01:09:13,123 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 83 proven. 27 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-12-07 01:09:13,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:09:13,634 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:09:13,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267417243] [2021-12-07 01:09:13,634 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 01:09:13,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436614934] [2021-12-07 01:09:13,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436614934] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:09:13,634 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-07 01:09:13,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2021-12-07 01:09:13,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238081740] [2021-12-07 01:09:13,634 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-07 01:09:13,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-07 01:09:13,635 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:09:13,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-07 01:09:13,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2021-12-07 01:09:13,635 INFO L87 Difference]: Start difference. First operand 383 states and 439 transitions. Second operand has 24 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 21 states have internal predecessors, (56), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-07 01:09:13,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:09:13,988 INFO L93 Difference]: Finished difference Result 617 states and 735 transitions. [2021-12-07 01:09:13,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-07 01:09:13,989 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 21 states have internal predecessors, (56), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 84 [2021-12-07 01:09:13,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:09:13,991 INFO L225 Difference]: With dead ends: 617 [2021-12-07 01:09:13,991 INFO L226 Difference]: Without dead ends: 617 [2021-12-07 01:09:13,992 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=94, Invalid=776, Unknown=0, NotChecked=0, Total=870 [2021-12-07 01:09:13,992 INFO L933 BasicCegarLoop]: 302 mSDtfsCounter, 143 mSDsluCounter, 2944 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 3246 SdHoareTripleChecker+Invalid, 1826 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1735 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 01:09:13,992 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 3246 Invalid, 1826 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 85 Invalid, 0 Unknown, 1735 Unchecked, 0.1s Time] [2021-12-07 01:09:13,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2021-12-07 01:09:14,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 395. [2021-12-07 01:09:14,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 295 states have (on average 1.3322033898305086) internal successors, (393), 360 states have internal predecessors, (393), 20 states have call successors, (20), 12 states have call predecessors, (20), 20 states have return successors, (46), 22 states have call predecessors, (46), 20 states have call successors, (46) [2021-12-07 01:09:14,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 459 transitions. [2021-12-07 01:09:14,002 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 459 transitions. Word has length 84 [2021-12-07 01:09:14,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:09:14,003 INFO L470 AbstractCegarLoop]: Abstraction has 395 states and 459 transitions. [2021-12-07 01:09:14,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 21 states have internal predecessors, (56), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-07 01:09:14,003 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 459 transitions. [2021-12-07 01:09:14,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-12-07 01:09:14,004 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:09:14,004 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:09:14,036 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2021-12-07 01:09:14,204 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:09:14,205 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-12-07 01:09:14,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:09:14,205 INFO L85 PathProgramCache]: Analyzing trace with hash 401179046, now seen corresponding path program 2 times [2021-12-07 01:09:14,205 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:09:14,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098266013] [2021-12-07 01:09:14,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:09:14,206 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:09:14,226 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 01:09:14,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [497660493] [2021-12-07 01:09:14,227 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 01:09:14,227 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:09:14,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:09:14,229 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:09:14,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-07 01:09:14,455 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-07 01:09:14,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:09:14,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 619 conjuncts, 63 conjunts are in the unsatisfiable core [2021-12-07 01:09:14,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:09:14,490 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-07 01:09:14,502 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 0 case distinctions, treesize of input 10 treesize of output 9 [2021-12-07 01:09:17,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:09:17,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 20 treesize of output 22 [2021-12-07 01:09:17,216 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-07 01:09:17,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-12-07 01:09:18,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:09:18,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 20 treesize of output 22 [2021-12-07 01:09:18,085 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-07 01:09:18,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-07 01:09:20,133 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 83 proven. 26 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-12-07 01:09:20,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:09:20,454 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:09:20,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098266013] [2021-12-07 01:09:20,455 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 01:09:20,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497660493] [2021-12-07 01:09:20,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497660493] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:09:20,455 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-07 01:09:20,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-12-07 01:09:20,455 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264838564] [2021-12-07 01:09:20,455 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-07 01:09:20,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-07 01:09:20,455 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:09:20,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-07 01:09:20,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-12-07 01:09:20,456 INFO L87 Difference]: Start difference. First operand 395 states and 459 transitions. Second operand has 17 states, 16 states have (on average 3.5) internal successors, (56), 15 states have internal predecessors, (56), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-07 01:09:21,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:09:21,140 INFO L93 Difference]: Finished difference Result 470 states and 556 transitions. [2021-12-07 01:09:21,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-07 01:09:21,141 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.5) internal successors, (56), 15 states have internal predecessors, (56), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) Word has length 84 [2021-12-07 01:09:21,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:09:21,142 INFO L225 Difference]: With dead ends: 470 [2021-12-07 01:09:21,143 INFO L226 Difference]: Without dead ends: 470 [2021-12-07 01:09:21,143 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=84, Invalid=618, Unknown=0, NotChecked=0, Total=702 [2021-12-07 01:09:21,143 INFO L933 BasicCegarLoop]: 169 mSDtfsCounter, 5 mSDsluCounter, 1311 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 1480 SdHoareTripleChecker+Invalid, 1132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1047 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 01:09:21,143 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 1480 Invalid, 1132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 79 Invalid, 0 Unknown, 1047 Unchecked, 0.1s Time] [2021-12-07 01:09:21,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2021-12-07 01:09:21,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 408. [2021-12-07 01:09:21,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 303 states have (on average 1.3234323432343233) internal successors, (401), 368 states have internal predecessors, (401), 25 states have call successors, (25), 12 states have call predecessors, (25), 20 states have return successors, (56), 27 states have call predecessors, (56), 25 states have call successors, (56) [2021-12-07 01:09:21,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 482 transitions. [2021-12-07 01:09:21,152 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 482 transitions. Word has length 84 [2021-12-07 01:09:21,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:09:21,152 INFO L470 AbstractCegarLoop]: Abstraction has 408 states and 482 transitions. [2021-12-07 01:09:21,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.5) internal successors, (56), 15 states have internal predecessors, (56), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-07 01:09:21,152 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 482 transitions. [2021-12-07 01:09:21,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-12-07 01:09:21,153 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:09:21,153 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:09:21,173 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-12-07 01:09:21,354 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2021-12-07 01:09:21,354 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-12-07 01:09:21,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:09:21,356 INFO L85 PathProgramCache]: Analyzing trace with hash 596515993, now seen corresponding path program 3 times [2021-12-07 01:09:21,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:09:21,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127219231] [2021-12-07 01:09:21,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:09:21,357 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:09:21,372 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 01:09:21,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1884978719] [2021-12-07 01:09:21,373 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-07 01:09:21,373 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:09:21,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:09:21,374 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:09:21,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-07 01:09:21,563 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-07 01:09:21,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:09:21,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-07 01:09:21,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:09:21,633 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2021-12-07 01:09:21,633 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:09:21,634 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:09:21,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127219231] [2021-12-07 01:09:21,634 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 01:09:21,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884978719] [2021-12-07 01:09:21,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884978719] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:09:21,634 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:09:21,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-07 01:09:21,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905671858] [2021-12-07 01:09:21,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:09:21,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-07 01:09:21,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:09:21,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-07 01:09:21,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-07 01:09:21,635 INFO L87 Difference]: Start difference. First operand 408 states and 482 transitions. Second operand has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 1 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-07 01:09:21,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:09:21,694 INFO L93 Difference]: Finished difference Result 364 states and 400 transitions. [2021-12-07 01:09:21,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-07 01:09:21,695 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 1 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 85 [2021-12-07 01:09:21,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:09:21,696 INFO L225 Difference]: With dead ends: 364 [2021-12-07 01:09:21,696 INFO L226 Difference]: Without dead ends: 309 [2021-12-07 01:09:21,696 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-07 01:09:21,697 INFO L933 BasicCegarLoop]: 176 mSDtfsCounter, 17 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 514 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 01:09:21,697 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 514 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 01:09:21,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2021-12-07 01:09:21,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 279. [2021-12-07 01:09:21,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 198 states have (on average 1.4141414141414141) internal successors, (280), 257 states have internal predecessors, (280), 13 states have call successors, (13), 8 states have call predecessors, (13), 8 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-12-07 01:09:21,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 306 transitions. [2021-12-07 01:09:21,702 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 306 transitions. Word has length 85 [2021-12-07 01:09:21,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:09:21,702 INFO L470 AbstractCegarLoop]: Abstraction has 279 states and 306 transitions. [2021-12-07 01:09:21,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 1 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-07 01:09:21,702 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 306 transitions. [2021-12-07 01:09:21,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-12-07 01:09:21,702 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:09:21,703 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:09:21,722 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2021-12-07 01:09:21,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:09:21,904 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-12-07 01:09:21,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:09:21,905 INFO L85 PathProgramCache]: Analyzing trace with hash -1074937127, now seen corresponding path program 4 times [2021-12-07 01:09:21,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:09:21,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507800113] [2021-12-07 01:09:21,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:09:21,906 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:09:21,949 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 01:09:21,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1190703641] [2021-12-07 01:09:21,949 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-07 01:09:21,949 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:09:21,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:09:21,950 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:09:21,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-12-07 01:09:22,168 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-07 01:09:22,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:09:22,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 694 conjuncts, 87 conjunts are in the unsatisfiable core [2021-12-07 01:09:22,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:09:22,208 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-07 01:09:22,212 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-07 01:09:23,164 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-07 01:09:23,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-12-07 01:09:23,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 26 [2021-12-07 01:09:23,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:09:23,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 26 [2021-12-07 01:09:23,437 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-07 01:09:23,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-07 01:09:24,565 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 100 proven. 49 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-12-07 01:09:24,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:09:24,840 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:09:24,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507800113] [2021-12-07 01:09:24,840 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 01:09:24,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190703641] [2021-12-07 01:09:24,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190703641] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:09:24,840 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-07 01:09:24,840 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2021-12-07 01:09:24,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444127346] [2021-12-07 01:09:24,841 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-07 01:09:24,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-07 01:09:24,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:09:24,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-07 01:09:24,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2021-12-07 01:09:24,842 INFO L87 Difference]: Start difference. First operand 279 states and 306 transitions. Second operand has 22 states, 20 states have (on average 3.05) internal successors, (61), 19 states have internal predecessors, (61), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-07 01:09:25,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:09:25,152 INFO L93 Difference]: Finished difference Result 361 states and 412 transitions. [2021-12-07 01:09:25,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-07 01:09:25,152 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 3.05) internal successors, (61), 19 states have internal predecessors, (61), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) Word has length 89 [2021-12-07 01:09:25,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:09:25,154 INFO L225 Difference]: With dead ends: 361 [2021-12-07 01:09:25,154 INFO L226 Difference]: Without dead ends: 361 [2021-12-07 01:09:25,154 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=101, Invalid=891, Unknown=0, NotChecked=0, Total=992 [2021-12-07 01:09:25,154 INFO L933 BasicCegarLoop]: 167 mSDtfsCounter, 2 mSDsluCounter, 1403 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1570 SdHoareTripleChecker+Invalid, 1163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1080 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 01:09:25,155 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1570 Invalid, 1163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 77 Invalid, 0 Unknown, 1080 Unchecked, 0.1s Time] [2021-12-07 01:09:25,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2021-12-07 01:09:25,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 322. [2021-12-07 01:09:25,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 235 states have (on average 1.374468085106383) internal successors, (323), 294 states have internal predecessors, (323), 17 states have call successors, (17), 8 states have call predecessors, (17), 10 states have return successors, (24), 19 states have call predecessors, (24), 17 states have call successors, (24) [2021-12-07 01:09:25,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 364 transitions. [2021-12-07 01:09:25,161 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 364 transitions. Word has length 89 [2021-12-07 01:09:25,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:09:25,161 INFO L470 AbstractCegarLoop]: Abstraction has 322 states and 364 transitions. [2021-12-07 01:09:25,161 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 3.05) internal successors, (61), 19 states have internal predecessors, (61), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-07 01:09:25,161 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 364 transitions. [2021-12-07 01:09:25,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-12-07 01:09:25,161 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:09:25,162 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:09:25,182 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2021-12-07 01:09:25,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:09:25,363 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-12-07 01:09:25,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:09:25,364 INFO L85 PathProgramCache]: Analyzing trace with hash 206067916, now seen corresponding path program 5 times [2021-12-07 01:09:25,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:09:25,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597101366] [2021-12-07 01:09:25,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:09:25,365 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:09:25,418 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 01:09:25,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [156733338] [2021-12-07 01:09:25,419 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-07 01:09:25,420 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:09:25,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:09:25,422 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:09:25,425 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-12-07 01:09:25,531 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-07 01:09:25,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:09:25,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-07 01:09:25,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:09:25,619 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 111 proven. 1 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-12-07 01:09:25,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:09:25,810 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 11 proven. 47 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2021-12-07 01:09:25,810 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:09:25,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597101366] [2021-12-07 01:09:25,811 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 01:09:25,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156733338] [2021-12-07 01:09:25,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156733338] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:09:25,811 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:09:25,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-12-07 01:09:25,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364085028] [2021-12-07 01:09:25,811 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:09:25,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-07 01:09:25,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:09:25,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-07 01:09:25,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-12-07 01:09:25,812 INFO L87 Difference]: Start difference. First operand 322 states and 364 transitions. Second operand has 10 states, 10 states have (on average 5.9) internal successors, (59), 10 states have internal predecessors, (59), 2 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-07 01:09:26,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:09:26,032 INFO L93 Difference]: Finished difference Result 381 states and 418 transitions. [2021-12-07 01:09:26,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-07 01:09:26,032 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.9) internal successors, (59), 10 states have internal predecessors, (59), 2 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 90 [2021-12-07 01:09:26,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:09:26,034 INFO L225 Difference]: With dead ends: 381 [2021-12-07 01:09:26,034 INFO L226 Difference]: Without dead ends: 321 [2021-12-07 01:09:26,034 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=167, Unknown=0, NotChecked=0, Total=272 [2021-12-07 01:09:26,035 INFO L933 BasicCegarLoop]: 177 mSDtfsCounter, 60 mSDsluCounter, 513 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 690 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 01:09:26,035 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 690 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 01:09:26,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2021-12-07 01:09:26,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 321. [2021-12-07 01:09:26,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 238 states have (on average 1.3697478991596639) internal successors, (326), 297 states have internal predecessors, (326), 13 states have call successors, (13), 10 states have call predecessors, (13), 10 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-12-07 01:09:26,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 352 transitions. [2021-12-07 01:09:26,040 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 352 transitions. Word has length 90 [2021-12-07 01:09:26,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:09:26,040 INFO L470 AbstractCegarLoop]: Abstraction has 321 states and 352 transitions. [2021-12-07 01:09:26,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.9) internal successors, (59), 10 states have internal predecessors, (59), 2 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-07 01:09:26,040 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 352 transitions. [2021-12-07 01:09:26,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-12-07 01:09:26,041 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:09:26,041 INFO L514 BasicCegarLoop]: trace histogram [22, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:09:26,060 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2021-12-07 01:09:26,242 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-12-07 01:09:26,242 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-12-07 01:09:26,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:09:26,244 INFO L85 PathProgramCache]: Analyzing trace with hash 1476348313, now seen corresponding path program 6 times [2021-12-07 01:09:26,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:09:26,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70372399] [2021-12-07 01:09:26,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:09:26,245 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:09:26,266 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 01:09:26,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [250433157] [2021-12-07 01:09:26,266 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-07 01:09:26,266 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:09:26,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:09:26,267 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:09:26,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-12-07 01:09:28,086 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-12-07 01:09:28,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:09:28,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 21 conjunts are in the unsatisfiable core [2021-12-07 01:09:28,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:09:28,171 INFO L134 CoverageAnalysis]: Checked inductivity of 498 backedges. 110 proven. 3 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2021-12-07 01:09:28,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:09:28,390 INFO L134 CoverageAnalysis]: Checked inductivity of 498 backedges. 110 proven. 3 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2021-12-07 01:09:28,390 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:09:28,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70372399] [2021-12-07 01:09:28,390 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 01:09:28,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250433157] [2021-12-07 01:09:28,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250433157] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:09:28,390 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:09:28,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-12-07 01:09:28,390 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548007771] [2021-12-07 01:09:28,390 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:09:28,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-07 01:09:28,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:09:28,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-07 01:09:28,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-12-07 01:09:28,391 INFO L87 Difference]: Start difference. First operand 321 states and 352 transitions. Second operand has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 12 states have internal predecessors, (52), 1 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-07 01:09:28,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:09:28,651 INFO L93 Difference]: Finished difference Result 377 states and 416 transitions. [2021-12-07 01:09:28,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-07 01:09:28,652 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 12 states have internal predecessors, (52), 1 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 105 [2021-12-07 01:09:28,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:09:28,653 INFO L225 Difference]: With dead ends: 377 [2021-12-07 01:09:28,653 INFO L226 Difference]: Without dead ends: 337 [2021-12-07 01:09:28,653 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=141, Invalid=239, Unknown=0, NotChecked=0, Total=380 [2021-12-07 01:09:28,654 INFO L933 BasicCegarLoop]: 175 mSDtfsCounter, 86 mSDsluCounter, 855 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 1030 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 01:09:28,654 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 1030 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 01:09:28,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2021-12-07 01:09:28,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 337. [2021-12-07 01:09:28,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 254 states have (on average 1.330708661417323) internal successors, (338), 313 states have internal predecessors, (338), 13 states have call successors, (13), 10 states have call predecessors, (13), 10 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-12-07 01:09:28,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 364 transitions. [2021-12-07 01:09:28,659 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 364 transitions. Word has length 105 [2021-12-07 01:09:28,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:09:28,659 INFO L470 AbstractCegarLoop]: Abstraction has 337 states and 364 transitions. [2021-12-07 01:09:28,659 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 12 states have internal predecessors, (52), 1 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-07 01:09:28,659 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 364 transitions. [2021-12-07 01:09:28,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-12-07 01:09:28,659 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:09:28,660 INFO L514 BasicCegarLoop]: trace histogram [26, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:09:28,680 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2021-12-07 01:09:28,860 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-12-07 01:09:28,861 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-12-07 01:09:28,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:09:28,862 INFO L85 PathProgramCache]: Analyzing trace with hash -1993448487, now seen corresponding path program 7 times [2021-12-07 01:09:28,862 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:09:28,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373332373] [2021-12-07 01:09:28,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:09:28,863 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:09:28,914 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 01:09:28,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [373073882] [2021-12-07 01:09:28,915 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-07 01:09:28,919 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:09:28,919 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:09:28,920 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:09:28,921 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-12-07 01:09:29,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:09:29,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 994 conjuncts, 72 conjunts are in the unsatisfiable core [2021-12-07 01:09:29,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:09:29,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 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 12 treesize of output 9 [2021-12-07 01:09:29,740 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-07 01:09:30,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:09:30,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 14 [2021-12-07 01:09:30,079 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-07 01:09:30,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-12-07 01:09:30,270 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-12-07 01:09:30,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 33 [2021-12-07 01:09:30,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-07 01:09:30,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-07 01:09:30,353 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 326 proven. 116 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2021-12-07 01:09:30,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:09:30,568 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:09:30,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373332373] [2021-12-07 01:09:30,568 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 01:09:30,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373073882] [2021-12-07 01:09:30,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373073882] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:09:30,568 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-07 01:09:30,568 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-12-07 01:09:30,568 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124513998] [2021-12-07 01:09:30,568 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-07 01:09:30,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-07 01:09:30,569 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:09:30,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-07 01:09:30,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-12-07 01:09:30,569 INFO L87 Difference]: Start difference. First operand 337 states and 364 transitions. Second operand has 16 states, 14 states have (on average 4.214285714285714) internal successors, (59), 14 states have internal predecessors, (59), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-07 01:09:31,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:09:31,099 INFO L93 Difference]: Finished difference Result 511 states and 552 transitions. [2021-12-07 01:09:31,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-07 01:09:31,100 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 4.214285714285714) internal successors, (59), 14 states have internal predecessors, (59), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 109 [2021-12-07 01:09:31,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:09:31,102 INFO L225 Difference]: With dead ends: 511 [2021-12-07 01:09:31,102 INFO L226 Difference]: Without dead ends: 511 [2021-12-07 01:09:31,102 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2021-12-07 01:09:31,102 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 172 mSDsluCounter, 939 mSDsCounter, 0 mSdLazyCounter, 887 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 1054 SdHoareTripleChecker+Invalid, 1117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 887 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 219 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-07 01:09:31,103 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 1054 Invalid, 1117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 887 Invalid, 0 Unknown, 219 Unchecked, 0.4s Time] [2021-12-07 01:09:31,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2021-12-07 01:09:31,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 345. [2021-12-07 01:09:31,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 262 states have (on average 1.33206106870229) internal successors, (349), 321 states have internal predecessors, (349), 13 states have call successors, (13), 10 states have call predecessors, (13), 10 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-12-07 01:09:31,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 375 transitions. [2021-12-07 01:09:31,108 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 375 transitions. Word has length 109 [2021-12-07 01:09:31,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:09:31,109 INFO L470 AbstractCegarLoop]: Abstraction has 345 states and 375 transitions. [2021-12-07 01:09:31,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 4.214285714285714) internal successors, (59), 14 states have internal predecessors, (59), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-07 01:09:31,112 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 375 transitions. [2021-12-07 01:09:31,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-12-07 01:09:31,112 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:09:31,112 INFO L514 BasicCegarLoop]: trace histogram [26, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:09:31,138 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2021-12-07 01:09:31,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-12-07 01:09:31,314 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-12-07 01:09:31,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:09:31,315 INFO L85 PathProgramCache]: Analyzing trace with hash -148581798, now seen corresponding path program 1 times [2021-12-07 01:09:31,315 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:09:31,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701244284] [2021-12-07 01:09:31,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:09:31,316 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:09:31,342 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 01:09:31,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [764945065] [2021-12-07 01:09:31,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:09:31,343 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:09:31,343 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:09:31,343 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:09:31,345 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-12-07 01:09:31,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:09:31,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 1011 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-07 01:09:31,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:09:31,595 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2021-12-07 01:09:31,595 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:09:31,595 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:09:31,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701244284] [2021-12-07 01:09:31,595 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 01:09:31,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764945065] [2021-12-07 01:09:31,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764945065] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:09:31,596 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:09:31,596 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-07 01:09:31,596 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650173686] [2021-12-07 01:09:31,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:09:31,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 01:09:31,596 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:09:31,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 01:09:31,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:09:31,597 INFO L87 Difference]: Start difference. First operand 345 states and 375 transitions. Second operand has 3 states, 2 states have (on average 17.0) internal successors, (34), 3 states have internal predecessors, (34), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-07 01:09:31,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:09:31,693 INFO L93 Difference]: Finished difference Result 350 states and 383 transitions. [2021-12-07 01:09:31,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 01:09:31,693 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 17.0) internal successors, (34), 3 states have internal predecessors, (34), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 111 [2021-12-07 01:09:31,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:09:31,695 INFO L225 Difference]: With dead ends: 350 [2021-12-07 01:09:31,695 INFO L226 Difference]: Without dead ends: 350 [2021-12-07 01:09:31,695 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 109 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 01:09:31,695 INFO L933 BasicCegarLoop]: 153 mSDtfsCounter, 137 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 01:09:31,695 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 189 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 01:09:31,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2021-12-07 01:09:31,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 344. [2021-12-07 01:09:31,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 262 states have (on average 1.3282442748091603) internal successors, (348), 320 states have internal predecessors, (348), 13 states have call successors, (13), 10 states have call predecessors, (13), 10 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-12-07 01:09:31,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 374 transitions. [2021-12-07 01:09:31,701 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 374 transitions. Word has length 111 [2021-12-07 01:09:31,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:09:31,701 INFO L470 AbstractCegarLoop]: Abstraction has 344 states and 374 transitions. [2021-12-07 01:09:31,701 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 17.0) internal successors, (34), 3 states have internal predecessors, (34), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-07 01:09:31,701 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 374 transitions. [2021-12-07 01:09:31,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-12-07 01:09:31,702 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:09:31,702 INFO L514 BasicCegarLoop]: trace histogram [26, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:09:31,723 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2021-12-07 01:09:31,902 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:09:31,902 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-12-07 01:09:31,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:09:31,903 INFO L85 PathProgramCache]: Analyzing trace with hash 1499809857, now seen corresponding path program 1 times [2021-12-07 01:09:31,903 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:09:31,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755568168] [2021-12-07 01:09:31,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:09:31,903 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:09:31,921 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 01:09:31,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1018740522] [2021-12-07 01:09:31,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:09:31,922 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:09:31,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:09:31,922 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:09:31,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-12-07 01:09:32,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:09:32,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 1032 conjuncts, 59 conjunts are in the unsatisfiable core [2021-12-07 01:09:32,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:09:32,241 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-07 01:09:32,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-12-07 01:09:32,338 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-12-07 01:09:32,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 33 [2021-12-07 01:09:32,459 INFO L354 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2021-12-07 01:09:32,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 30 [2021-12-07 01:09:32,634 INFO L354 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2021-12-07 01:09:32,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 38 [2021-12-07 01:09:32,791 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 178 proven. 360 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-12-07 01:09:32,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:09:32,860 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:09:32,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755568168] [2021-12-07 01:09:32,860 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 01:09:32,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018740522] [2021-12-07 01:09:32,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018740522] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:09:32,860 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-07 01:09:32,860 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2021-12-07 01:09:32,860 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112662966] [2021-12-07 01:09:32,860 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-07 01:09:32,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-07 01:09:32,863 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:09:32,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-07 01:09:32,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-12-07 01:09:32,864 INFO L87 Difference]: Start difference. First operand 344 states and 374 transitions. Second operand has 23 states, 21 states have (on average 3.9523809523809526) internal successors, (83), 20 states have internal predecessors, (83), 4 states have call successors, (6), 2 states have call predecessors, (6), 6 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-07 01:09:37,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:09:37,244 INFO L93 Difference]: Finished difference Result 588 states and 644 transitions. [2021-12-07 01:09:37,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-07 01:09:37,245 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 3.9523809523809526) internal successors, (83), 20 states have internal predecessors, (83), 4 states have call successors, (6), 2 states have call predecessors, (6), 6 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) Word has length 115 [2021-12-07 01:09:37,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:09:37,247 INFO L225 Difference]: With dead ends: 588 [2021-12-07 01:09:37,247 INFO L226 Difference]: Without dead ends: 588 [2021-12-07 01:09:37,247 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 108 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=150, Invalid=970, Unknown=2, NotChecked=0, Total=1122 [2021-12-07 01:09:37,248 INFO L933 BasicCegarLoop]: 147 mSDtfsCounter, 183 mSDsluCounter, 1934 mSDsCounter, 0 mSdLazyCounter, 523 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 2081 SdHoareTripleChecker+Invalid, 1110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 584 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-07 01:09:37,248 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 2081 Invalid, 1110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 523 Invalid, 0 Unknown, 584 Unchecked, 0.2s Time] [2021-12-07 01:09:37,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 588 states. [2021-12-07 01:09:37,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 588 to 555. [2021-12-07 01:09:37,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 555 states, 452 states have (on average 1.247787610619469) internal successors, (564), 510 states have internal predecessors, (564), 24 states have call successors, (24), 20 states have call predecessors, (24), 20 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2021-12-07 01:09:37,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 612 transitions. [2021-12-07 01:09:37,255 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 612 transitions. Word has length 115 [2021-12-07 01:09:37,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:09:37,256 INFO L470 AbstractCegarLoop]: Abstraction has 555 states and 612 transitions. [2021-12-07 01:09:37,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 3.9523809523809526) internal successors, (83), 20 states have internal predecessors, (83), 4 states have call successors, (6), 2 states have call predecessors, (6), 6 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-07 01:09:37,256 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 612 transitions. [2021-12-07 01:09:37,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-12-07 01:09:37,256 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:09:37,256 INFO L514 BasicCegarLoop]: trace histogram [26, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:09:37,277 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2021-12-07 01:09:37,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-12-07 01:09:37,457 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-12-07 01:09:37,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:09:37,457 INFO L85 PathProgramCache]: Analyzing trace with hash 1499809858, now seen corresponding path program 1 times [2021-12-07 01:09:37,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:09:37,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076328841] [2021-12-07 01:09:37,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:09:37,457 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:09:37,484 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 01:09:37,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [154596167] [2021-12-07 01:09:37,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:09:37,485 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:09:37,485 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:09:37,486 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:09:37,486 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-12-07 01:09:39,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:09:39,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 1032 conjuncts, 143 conjunts are in the unsatisfiable core [2021-12-07 01:09:39,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:09:39,382 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-07 01:09:49,063 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 01:09:49,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 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 20 treesize of output 26 [2021-12-07 01:09:54,653 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-07 01:09:54,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-12-07 01:09:57,498 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-12-07 01:09:57,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 33 [2021-12-07 01:09:57,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 20 treesize of output 22 [2021-12-07 01:10:02,451 INFO L354 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2021-12-07 01:10:02,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 45 [2021-12-07 01:10:02,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 20 treesize of output 22 [2021-12-07 01:10:04,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:10:04,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2021-12-07 01:10:04,820 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-12-07 01:10:04,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 25 [2021-12-07 01:10:19,345 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 100 proven. 425 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-12-07 01:10:19,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:10:19,805 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:10:19,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076328841] [2021-12-07 01:10:19,805 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 01:10:19,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154596167] [2021-12-07 01:10:19,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154596167] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:10:19,805 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-07 01:10:19,805 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2021-12-07 01:10:19,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795501545] [2021-12-07 01:10:19,806 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-07 01:10:19,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-12-07 01:10:19,806 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:10:19,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-12-07 01:10:19,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1345, Unknown=0, NotChecked=0, Total=1482 [2021-12-07 01:10:19,807 INFO L87 Difference]: Start difference. First operand 555 states and 612 transitions. Second operand has 37 states, 33 states have (on average 2.4242424242424243) internal successors, (80), 32 states have internal predecessors, (80), 4 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-07 01:10:22,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:10:22,397 INFO L93 Difference]: Finished difference Result 564 states and 622 transitions. [2021-12-07 01:10:22,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-07 01:10:22,398 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 33 states have (on average 2.4242424242424243) internal successors, (80), 32 states have internal predecessors, (80), 4 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 115 [2021-12-07 01:10:22,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:10:22,400 INFO L225 Difference]: With dead ends: 564 [2021-12-07 01:10:22,400 INFO L226 Difference]: Without dead ends: 564 [2021-12-07 01:10:22,402 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 94 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 382 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=208, Invalid=2144, Unknown=0, NotChecked=0, Total=2352 [2021-12-07 01:10:22,402 INFO L933 BasicCegarLoop]: 157 mSDtfsCounter, 3 mSDsluCounter, 1757 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 1914 SdHoareTripleChecker+Invalid, 1172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1088 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 01:10:22,402 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 1914 Invalid, 1172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 78 Invalid, 0 Unknown, 1088 Unchecked, 0.1s Time] [2021-12-07 01:10:22,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2021-12-07 01:10:22,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 562. [2021-12-07 01:10:22,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 562 states, 459 states have (on average 1.2461873638344227) internal successors, (572), 517 states have internal predecessors, (572), 24 states have call successors, (24), 20 states have call predecessors, (24), 20 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2021-12-07 01:10:22,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 562 states to 562 states and 620 transitions. [2021-12-07 01:10:22,413 INFO L78 Accepts]: Start accepts. Automaton has 562 states and 620 transitions. Word has length 115 [2021-12-07 01:10:22,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:10:22,414 INFO L470 AbstractCegarLoop]: Abstraction has 562 states and 620 transitions. [2021-12-07 01:10:22,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 33 states have (on average 2.4242424242424243) internal successors, (80), 32 states have internal predecessors, (80), 4 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-07 01:10:22,414 INFO L276 IsEmpty]: Start isEmpty. Operand 562 states and 620 transitions. [2021-12-07 01:10:22,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-12-07 01:10:22,415 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:10:22,415 INFO L514 BasicCegarLoop]: trace histogram [26, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:10:22,442 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2021-12-07 01:10:22,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-12-07 01:10:22,615 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-12-07 01:10:22,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:10:22,616 INFO L85 PathProgramCache]: Analyzing trace with hash -750534634, now seen corresponding path program 1 times [2021-12-07 01:10:22,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:10:22,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036645720] [2021-12-07 01:10:22,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:10:22,616 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:10:22,637 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 01:10:22,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1516007331] [2021-12-07 01:10:22,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:10:22,638 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:10:22,638 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:10:22,639 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:10:22,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-12-07 01:10:22,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:10:22,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 1040 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-07 01:10:22,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:10:22,923 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2021-12-07 01:10:22,924 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:10:22,924 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:10:22,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036645720] [2021-12-07 01:10:22,924 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 01:10:22,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516007331] [2021-12-07 01:10:22,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516007331] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:10:22,924 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:10:22,924 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 01:10:22,924 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378677530] [2021-12-07 01:10:22,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:10:22,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-07 01:10:22,925 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:10:22,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-07 01:10:22,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-07 01:10:22,925 INFO L87 Difference]: Start difference. First operand 562 states and 620 transitions. Second operand has 4 states, 3 states have (on average 13.0) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-07 01:10:23,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:10:23,011 INFO L93 Difference]: Finished difference Result 596 states and 657 transitions. [2021-12-07 01:10:23,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-07 01:10:23,012 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 13.0) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 116 [2021-12-07 01:10:23,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:10:23,014 INFO L225 Difference]: With dead ends: 596 [2021-12-07 01:10:23,014 INFO L226 Difference]: Without dead ends: 596 [2021-12-07 01:10:23,014 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 114 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 01:10:23,014 INFO L933 BasicCegarLoop]: 158 mSDtfsCounter, 244 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 01:10:23,014 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [245 Valid, 270 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 01:10:23,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 596 states. [2021-12-07 01:10:23,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 596 to 561. [2021-12-07 01:10:23,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 561 states, 459 states have (on average 1.2440087145969498) internal successors, (571), 516 states have internal predecessors, (571), 24 states have call successors, (24), 20 states have call predecessors, (24), 20 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2021-12-07 01:10:23,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 561 states to 561 states and 619 transitions. [2021-12-07 01:10:23,022 INFO L78 Accepts]: Start accepts. Automaton has 561 states and 619 transitions. Word has length 116 [2021-12-07 01:10:23,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:10:23,022 INFO L470 AbstractCegarLoop]: Abstraction has 561 states and 619 transitions. [2021-12-07 01:10:23,022 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 13.0) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-07 01:10:23,022 INFO L276 IsEmpty]: Start isEmpty. Operand 561 states and 619 transitions. [2021-12-07 01:10:23,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-12-07 01:10:23,023 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:10:23,023 INFO L514 BasicCegarLoop]: trace histogram [26, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:10:23,044 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2021-12-07 01:10:23,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-12-07 01:10:23,223 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-12-07 01:10:23,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:10:23,224 INFO L85 PathProgramCache]: Analyzing trace with hash -750534633, now seen corresponding path program 1 times [2021-12-07 01:10:23,224 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:10:23,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281040456] [2021-12-07 01:10:23,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:10:23,224 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:10:23,248 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 01:10:23,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1502623569] [2021-12-07 01:10:23,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:10:23,248 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:10:23,248 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:10:23,249 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:10:23,250 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-12-07 01:10:23,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:10:23,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 1040 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-07 01:10:23,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:10:23,629 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 64 proven. 106 refuted. 0 times theorem prover too weak. 446 trivial. 0 not checked. [2021-12-07 01:10:23,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:10:23,689 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 01:10:23,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2021-12-07 01:10:23,923 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 64 proven. 106 refuted. 0 times theorem prover too weak. 446 trivial. 0 not checked. [2021-12-07 01:10:23,924 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:10:23,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281040456] [2021-12-07 01:10:23,924 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 01:10:23,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502623569] [2021-12-07 01:10:23,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502623569] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:10:23,924 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:10:23,924 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-12-07 01:10:23,924 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116567299] [2021-12-07 01:10:23,925 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:10:23,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-07 01:10:23,925 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:10:23,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-07 01:10:23,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-12-07 01:10:23,926 INFO L87 Difference]: Start difference. First operand 561 states and 619 transitions. Second operand has 18 states, 17 states have (on average 4.705882352941177) internal successors, (80), 16 states have internal predecessors, (80), 3 states have call successors, (9), 1 states have call predecessors, (9), 3 states have return successors, (10), 5 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-07 01:10:24,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:10:24,137 INFO L93 Difference]: Finished difference Result 569 states and 630 transitions. [2021-12-07 01:10:24,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-07 01:10:24,137 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 4.705882352941177) internal successors, (80), 16 states have internal predecessors, (80), 3 states have call successors, (9), 1 states have call predecessors, (9), 3 states have return successors, (10), 5 states have call predecessors, (10), 3 states have call successors, (10) Word has length 116 [2021-12-07 01:10:24,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:10:24,139 INFO L225 Difference]: With dead ends: 569 [2021-12-07 01:10:24,139 INFO L226 Difference]: Without dead ends: 569 [2021-12-07 01:10:24,139 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-12-07 01:10:24,140 INFO L933 BasicCegarLoop]: 146 mSDtfsCounter, 588 mSDsluCounter, 1242 mSDsCounter, 0 mSdLazyCounter, 480 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 589 SdHoareTripleChecker+Valid, 1388 SdHoareTripleChecker+Invalid, 493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-07 01:10:24,140 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [589 Valid, 1388 Invalid, 493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 480 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-07 01:10:24,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2021-12-07 01:10:24,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 560. [2021-12-07 01:10:24,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 560 states, 459 states have (on average 1.2418300653594772) internal successors, (570), 515 states have internal predecessors, (570), 24 states have call successors, (24), 20 states have call predecessors, (24), 20 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2021-12-07 01:10:24,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 560 states to 560 states and 618 transitions. [2021-12-07 01:10:24,147 INFO L78 Accepts]: Start accepts. Automaton has 560 states and 618 transitions. Word has length 116 [2021-12-07 01:10:24,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:10:24,147 INFO L470 AbstractCegarLoop]: Abstraction has 560 states and 618 transitions. [2021-12-07 01:10:24,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 4.705882352941177) internal successors, (80), 16 states have internal predecessors, (80), 3 states have call successors, (9), 1 states have call predecessors, (9), 3 states have return successors, (10), 5 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-07 01:10:24,147 INFO L276 IsEmpty]: Start isEmpty. Operand 560 states and 618 transitions. [2021-12-07 01:10:24,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-12-07 01:10:24,148 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:10:24,148 INFO L514 BasicCegarLoop]: trace histogram [26, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:10:24,169 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2021-12-07 01:10:24,348 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:10:24,348 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-12-07 01:10:24,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:10:24,349 INFO L85 PathProgramCache]: Analyzing trace with hash 290724311, now seen corresponding path program 1 times [2021-12-07 01:10:24,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:10:24,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049180290] [2021-12-07 01:10:24,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:10:24,349 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:10:24,368 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 01:10:24,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [68598676] [2021-12-07 01:10:24,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:10:24,369 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:10:24,369 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:10:24,369 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:10:24,370 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-12-07 01:10:24,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:10:24,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 1057 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-07 01:10:24,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:10:24,657 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2021-12-07 01:10:24,657 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:10:24,657 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:10:24,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049180290] [2021-12-07 01:10:24,657 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 01:10:24,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68598676] [2021-12-07 01:10:24,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68598676] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:10:24,657 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:10:24,658 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-07 01:10:24,658 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670506324] [2021-12-07 01:10:24,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:10:24,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 01:10:24,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:10:24,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 01:10:24,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:10:24,658 INFO L87 Difference]: Start difference. First operand 560 states and 618 transitions. Second operand has 3 states, 2 states have (on average 20.5) internal successors, (41), 3 states have internal predecessors, (41), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-07 01:10:24,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:10:24,721 INFO L93 Difference]: Finished difference Result 589 states and 649 transitions. [2021-12-07 01:10:24,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 01:10:24,721 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 20.5) internal successors, (41), 3 states have internal predecessors, (41), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 118 [2021-12-07 01:10:24,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:10:24,723 INFO L225 Difference]: With dead ends: 589 [2021-12-07 01:10:24,723 INFO L226 Difference]: Without dead ends: 589 [2021-12-07 01:10:24,723 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 116 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 01:10:24,724 INFO L933 BasicCegarLoop]: 159 mSDtfsCounter, 65 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 01:10:24,724 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 253 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 01:10:24,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2021-12-07 01:10:24,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 559. [2021-12-07 01:10:24,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 559 states, 459 states have (on average 1.2396514161220045) internal successors, (569), 514 states have internal predecessors, (569), 24 states have call successors, (24), 20 states have call predecessors, (24), 20 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2021-12-07 01:10:24,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 617 transitions. [2021-12-07 01:10:24,730 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 617 transitions. Word has length 118 [2021-12-07 01:10:24,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:10:24,731 INFO L470 AbstractCegarLoop]: Abstraction has 559 states and 617 transitions. [2021-12-07 01:10:24,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 20.5) internal successors, (41), 3 states have internal predecessors, (41), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-07 01:10:24,731 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 617 transitions. [2021-12-07 01:10:24,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-12-07 01:10:24,731 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:10:24,731 INFO L514 BasicCegarLoop]: trace histogram [26, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:10:24,766 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2021-12-07 01:10:24,932 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:10:24,933 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-12-07 01:10:24,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:10:24,934 INFO L85 PathProgramCache]: Analyzing trace with hash 290724312, now seen corresponding path program 1 times [2021-12-07 01:10:24,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:10:24,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692778865] [2021-12-07 01:10:24,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:10:24,935 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:10:24,989 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 01:10:24,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1494563322] [2021-12-07 01:10:24,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:10:24,990 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:10:24,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:10:24,991 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:10:24,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-12-07 01:10:25,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:10:25,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 1057 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-07 01:10:25,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:10:25,322 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2021-12-07 01:10:25,322 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:10:25,322 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:10:25,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692778865] [2021-12-07 01:10:25,322 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 01:10:25,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494563322] [2021-12-07 01:10:25,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494563322] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:10:25,323 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:10:25,323 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-07 01:10:25,323 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938726517] [2021-12-07 01:10:25,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:10:25,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 01:10:25,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:10:25,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 01:10:25,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:10:25,324 INFO L87 Difference]: Start difference. First operand 559 states and 617 transitions. Second operand has 3 states, 2 states have (on average 20.5) internal successors, (41), 3 states have internal predecessors, (41), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-07 01:10:25,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:10:25,415 INFO L93 Difference]: Finished difference Result 562 states and 622 transitions. [2021-12-07 01:10:25,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 01:10:25,416 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 20.5) internal successors, (41), 3 states have internal predecessors, (41), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 118 [2021-12-07 01:10:25,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:10:25,418 INFO L225 Difference]: With dead ends: 562 [2021-12-07 01:10:25,418 INFO L226 Difference]: Without dead ends: 562 [2021-12-07 01:10:25,418 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 116 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 01:10:25,418 INFO L933 BasicCegarLoop]: 153 mSDtfsCounter, 121 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 01:10:25,419 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 195 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 01:10:25,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2021-12-07 01:10:25,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 558. [2021-12-07 01:10:25,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 558 states, 459 states have (on average 1.2374727668845316) internal successors, (568), 513 states have internal predecessors, (568), 24 states have call successors, (24), 20 states have call predecessors, (24), 20 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2021-12-07 01:10:25,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 616 transitions. [2021-12-07 01:10:25,425 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 616 transitions. Word has length 118 [2021-12-07 01:10:25,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:10:25,426 INFO L470 AbstractCegarLoop]: Abstraction has 558 states and 616 transitions. [2021-12-07 01:10:25,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 20.5) internal successors, (41), 3 states have internal predecessors, (41), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-07 01:10:25,426 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 616 transitions. [2021-12-07 01:10:25,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-12-07 01:10:25,427 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:10:25,427 INFO L514 BasicCegarLoop]: trace histogram [26, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:10:25,448 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2021-12-07 01:10:25,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-12-07 01:10:25,628 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-12-07 01:10:25,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:10:25,629 INFO L85 PathProgramCache]: Analyzing trace with hash -1282214337, now seen corresponding path program 1 times [2021-12-07 01:10:25,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:10:25,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16323984] [2021-12-07 01:10:25,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:10:25,630 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:10:25,687 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 01:10:25,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [89501784] [2021-12-07 01:10:25,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:10:25,687 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:10:25,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:10:25,688 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:10:25,689 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-12-07 01:10:25,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:10:25,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 1078 conjuncts, 92 conjunts are in the unsatisfiable core [2021-12-07 01:10:25,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:10:26,075 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-07 01:10:26,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-12-07 01:10:26,221 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-12-07 01:10:26,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 33 [2021-12-07 01:10:28,434 INFO L354 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2021-12-07 01:10:28,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 45 [2021-12-07 01:10:28,640 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-12-07 01:10:28,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 42 [2021-12-07 01:10:37,052 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-12-07 01:10:37,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 54 [2021-12-07 01:10:38,017 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 69 proven. 466 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-12-07 01:10:38,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:10:38,102 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:10:38,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16323984] [2021-12-07 01:10:38,102 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 01:10:38,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89501784] [2021-12-07 01:10:38,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89501784] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:10:38,102 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-07 01:10:38,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2021-12-07 01:10:38,102 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450266103] [2021-12-07 01:10:38,102 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-07 01:10:38,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-12-07 01:10:38,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:10:38,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-12-07 01:10:38,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1185, Unknown=5, NotChecked=0, Total=1332 [2021-12-07 01:10:38,103 INFO L87 Difference]: Start difference. First operand 558 states and 616 transitions. Second operand has 35 states, 33 states have (on average 2.727272727272727) internal successors, (90), 30 states have internal predecessors, (90), 5 states have call successors, (6), 2 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-07 01:10:42,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:10:42,464 INFO L93 Difference]: Finished difference Result 829 states and 916 transitions. [2021-12-07 01:10:42,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-07 01:10:42,464 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 33 states have (on average 2.727272727272727) internal successors, (90), 30 states have internal predecessors, (90), 5 states have call successors, (6), 2 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 122 [2021-12-07 01:10:42,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:10:42,467 INFO L225 Difference]: With dead ends: 829 [2021-12-07 01:10:42,467 INFO L226 Difference]: Without dead ends: 829 [2021-12-07 01:10:42,468 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 15.3s TimeCoverageRelationStatistics Valid=223, Invalid=1840, Unknown=7, NotChecked=0, Total=2070 [2021-12-07 01:10:42,468 INFO L933 BasicCegarLoop]: 145 mSDtfsCounter, 124 mSDsluCounter, 2199 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 2344 SdHoareTripleChecker+Invalid, 1016 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 639 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 01:10:42,468 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 2344 Invalid, 1016 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 375 Invalid, 0 Unknown, 639 Unchecked, 0.1s Time] [2021-12-07 01:10:42,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 829 states. [2021-12-07 01:10:42,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 829 to 796. [2021-12-07 01:10:42,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 796 states, 674 states have (on average 1.2062314540059347) internal successors, (813), 728 states have internal predecessors, (813), 37 states have call successors, (37), 30 states have call predecessors, (37), 30 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2021-12-07 01:10:42,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 796 states to 796 states and 887 transitions. [2021-12-07 01:10:42,478 INFO L78 Accepts]: Start accepts. Automaton has 796 states and 887 transitions. Word has length 122 [2021-12-07 01:10:42,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:10:42,478 INFO L470 AbstractCegarLoop]: Abstraction has 796 states and 887 transitions. [2021-12-07 01:10:42,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 33 states have (on average 2.727272727272727) internal successors, (90), 30 states have internal predecessors, (90), 5 states have call successors, (6), 2 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-07 01:10:42,478 INFO L276 IsEmpty]: Start isEmpty. Operand 796 states and 887 transitions. [2021-12-07 01:10:42,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-12-07 01:10:42,479 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:10:42,479 INFO L514 BasicCegarLoop]: trace histogram [26, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:10:42,500 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2021-12-07 01:10:42,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-12-07 01:10:42,679 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-12-07 01:10:42,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:10:42,680 INFO L85 PathProgramCache]: Analyzing trace with hash -1282214336, now seen corresponding path program 1 times [2021-12-07 01:10:42,680 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:10:42,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303362364] [2021-12-07 01:10:42,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:10:42,680 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:10:42,701 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 01:10:42,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [406471713] [2021-12-07 01:10:42,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:10:42,702 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:10:42,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:10:42,702 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:10:42,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-12-07 01:10:43,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:10:43,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 1078 conjuncts, 161 conjunts are in the unsatisfiable core [2021-12-07 01:10:43,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:10:43,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 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 12 treesize of output 9 [2021-12-07 01:10:43,458 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-07 01:10:43,787 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-07 01:10:43,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-12-07 01:10:43,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 14 [2021-12-07 01:10:44,045 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-12-07 01:10:44,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 33 [2021-12-07 01:10:44,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 14 [2021-12-07 01:10:44,535 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 01:10:44,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 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 12 treesize of output 18 [2021-12-07 01:10:44,558 INFO L354 Elim1Store]: treesize reduction 42, result has 27.6 percent of original size [2021-12-07 01:10:44,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 30 [2021-12-07 01:10:44,863 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 01:10:44,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 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 16 treesize of output 22 [2021-12-07 01:10:44,910 INFO L354 Elim1Store]: treesize reduction 96, result has 27.8 percent of original size [2021-12-07 01:10:44,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 32 treesize of output 57 [2021-12-07 01:10:47,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:10:47,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 4 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 01:10:47,321 INFO L354 Elim1Store]: treesize reduction 44, result has 32.3 percent of original size [2021-12-07 01:10:47,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 31 treesize of output 39 [2021-12-07 01:10:47,922 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 69 proven. 438 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-12-07 01:10:47,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:10:48,340 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:10:48,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303362364] [2021-12-07 01:10:48,340 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 01:10:48,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406471713] [2021-12-07 01:10:48,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406471713] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:10:48,340 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-07 01:10:48,340 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2021-12-07 01:10:48,340 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104168245] [2021-12-07 01:10:48,340 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-07 01:10:48,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-12-07 01:10:48,341 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:10:48,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-12-07 01:10:48,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1280, Unknown=1, NotChecked=0, Total=1406 [2021-12-07 01:10:48,341 INFO L87 Difference]: Start difference. First operand 796 states and 887 transitions. Second operand has 35 states, 32 states have (on average 2.5625) internal successors, (82), 30 states have internal predecessors, (82), 6 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-07 01:10:49,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:10:49,339 INFO L93 Difference]: Finished difference Result 834 states and 928 transitions. [2021-12-07 01:10:49,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-07 01:10:49,339 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 32 states have (on average 2.5625) internal successors, (82), 30 states have internal predecessors, (82), 6 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 122 [2021-12-07 01:10:49,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:10:49,342 INFO L225 Difference]: With dead ends: 834 [2021-12-07 01:10:49,342 INFO L226 Difference]: Without dead ends: 834 [2021-12-07 01:10:49,342 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 97 SyntacticMatches, 13 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 536 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=198, Invalid=1963, Unknown=1, NotChecked=0, Total=2162 [2021-12-07 01:10:49,343 INFO L933 BasicCegarLoop]: 150 mSDtfsCounter, 12 mSDsluCounter, 1671 mSDsCounter, 0 mSdLazyCounter, 597 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 1821 SdHoareTripleChecker+Invalid, 1346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 741 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-07 01:10:49,343 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 1821 Invalid, 1346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 597 Invalid, 0 Unknown, 741 Unchecked, 0.4s Time] [2021-12-07 01:10:49,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 834 states. [2021-12-07 01:10:49,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 834 to 818. [2021-12-07 01:10:49,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 818 states, 694 states have (on average 1.2031700288184437) internal successors, (835), 749 states have internal predecessors, (835), 38 states have call successors, (38), 31 states have call predecessors, (38), 31 states have return successors, (38), 37 states have call predecessors, (38), 38 states have call successors, (38) [2021-12-07 01:10:49,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 818 states to 818 states and 911 transitions. [2021-12-07 01:10:49,352 INFO L78 Accepts]: Start accepts. Automaton has 818 states and 911 transitions. Word has length 122 [2021-12-07 01:10:49,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:10:49,352 INFO L470 AbstractCegarLoop]: Abstraction has 818 states and 911 transitions. [2021-12-07 01:10:49,352 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 32 states have (on average 2.5625) internal successors, (82), 30 states have internal predecessors, (82), 6 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-07 01:10:49,353 INFO L276 IsEmpty]: Start isEmpty. Operand 818 states and 911 transitions. [2021-12-07 01:10:49,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-12-07 01:10:49,353 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:10:49,353 INFO L514 BasicCegarLoop]: trace histogram [26, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:10:49,378 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2021-12-07 01:10:49,554 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:10:49,554 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-12-07 01:10:49,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:10:49,554 INFO L85 PathProgramCache]: Analyzing trace with hash -1093938706, now seen corresponding path program 1 times [2021-12-07 01:10:49,555 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:10:49,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859003457] [2021-12-07 01:10:49,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:10:49,555 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:10:49,577 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 01:10:49,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1874552018] [2021-12-07 01:10:49,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:10:49,577 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:10:49,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:10:49,578 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:10:49,578 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-12-07 01:10:49,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:10:49,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 1086 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-07 01:10:49,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:10:49,900 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2021-12-07 01:10:49,900 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:10:49,900 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:10:49,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859003457] [2021-12-07 01:10:49,900 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 01:10:49,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874552018] [2021-12-07 01:10:49,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874552018] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:10:49,900 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:10:49,900 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 01:10:49,900 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801413961] [2021-12-07 01:10:49,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:10:49,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-07 01:10:49,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:10:49,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-07 01:10:49,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-07 01:10:49,901 INFO L87 Difference]: Start difference. First operand 818 states and 911 transitions. Second operand has 4 states, 3 states have (on average 15.333333333333334) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-07 01:10:49,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:10:49,987 INFO L93 Difference]: Finished difference Result 847 states and 941 transitions. [2021-12-07 01:10:49,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-07 01:10:49,988 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 15.333333333333334) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 123 [2021-12-07 01:10:49,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:10:49,990 INFO L225 Difference]: With dead ends: 847 [2021-12-07 01:10:49,990 INFO L226 Difference]: Without dead ends: 847 [2021-12-07 01:10:49,991 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 121 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 01:10:49,991 INFO L933 BasicCegarLoop]: 155 mSDtfsCounter, 214 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 01:10:49,991 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 267 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 01:10:49,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 847 states. [2021-12-07 01:10:49,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 847 to 817. [2021-12-07 01:10:49,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 817 states, 694 states have (on average 1.201729106628242) internal successors, (834), 748 states have internal predecessors, (834), 38 states have call successors, (38), 31 states have call predecessors, (38), 31 states have return successors, (38), 37 states have call predecessors, (38), 38 states have call successors, (38) [2021-12-07 01:10:50,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 817 states to 817 states and 910 transitions. [2021-12-07 01:10:50,000 INFO L78 Accepts]: Start accepts. Automaton has 817 states and 910 transitions. Word has length 123 [2021-12-07 01:10:50,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:10:50,000 INFO L470 AbstractCegarLoop]: Abstraction has 817 states and 910 transitions. [2021-12-07 01:10:50,000 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 15.333333333333334) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-07 01:10:50,001 INFO L276 IsEmpty]: Start isEmpty. Operand 817 states and 910 transitions. [2021-12-07 01:10:50,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-12-07 01:10:50,001 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:10:50,001 INFO L514 BasicCegarLoop]: trace histogram [26, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:10:50,025 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-12-07 01:10:50,202 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:10:50,202 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-12-07 01:10:50,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:10:50,204 INFO L85 PathProgramCache]: Analyzing trace with hash -1093938705, now seen corresponding path program 1 times [2021-12-07 01:10:50,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:10:50,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247508493] [2021-12-07 01:10:50,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:10:50,205 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:10:50,309 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 01:10:50,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [453508023] [2021-12-07 01:10:50,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:10:50,311 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:10:50,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:10:50,312 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:10:50,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-12-07 01:10:51,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:10:51,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 1086 conjuncts, 137 conjunts are in the unsatisfiable core [2021-12-07 01:10:51,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:10:51,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 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 12 treesize of output 9 [2021-12-07 01:10:51,411 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-07 01:10:51,666 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 01:10:51,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 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 12 treesize of output 18 [2021-12-07 01:10:51,679 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-07 01:10:51,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-12-07 01:10:51,846 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-12-07 01:10:51,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 33 [2021-12-07 01:10:51,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 14 [2021-12-07 01:10:52,074 INFO L354 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2021-12-07 01:10:52,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 45 [2021-12-07 01:10:52,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 14 [2021-12-07 01:10:54,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:10:54,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-07 01:10:54,359 INFO L354 Elim1Store]: treesize reduction 16, result has 51.5 percent of original size [2021-12-07 01:10:54,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 32 [2021-12-07 01:10:54,428 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 178 proven. 264 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2021-12-07 01:10:54,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:10:54,646 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:10:54,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247508493] [2021-12-07 01:10:54,646 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 01:10:54,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453508023] [2021-12-07 01:10:54,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453508023] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:10:54,646 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-07 01:10:54,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2021-12-07 01:10:54,647 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145739887] [2021-12-07 01:10:54,647 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-07 01:10:54,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-07 01:10:54,647 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:10:54,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-07 01:10:54,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=553, Unknown=1, NotChecked=0, Total=650 [2021-12-07 01:10:54,647 INFO L87 Difference]: Start difference. First operand 817 states and 910 transitions. Second operand has 24 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 19 states have internal predecessors, (73), 5 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-07 01:10:55,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:10:55,097 INFO L93 Difference]: Finished difference Result 966 states and 1071 transitions. [2021-12-07 01:10:55,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-07 01:10:55,098 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 19 states have internal predecessors, (73), 5 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 123 [2021-12-07 01:10:55,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:10:55,101 INFO L225 Difference]: With dead ends: 966 [2021-12-07 01:10:55,101 INFO L226 Difference]: Without dead ends: 966 [2021-12-07 01:10:55,101 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 122 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=124, Invalid=805, Unknown=1, NotChecked=0, Total=930 [2021-12-07 01:10:55,101 INFO L933 BasicCegarLoop]: 113 mSDtfsCounter, 146 mSDsluCounter, 1324 mSDsCounter, 0 mSdLazyCounter, 902 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 1437 SdHoareTripleChecker+Invalid, 1699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 902 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 783 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-07 01:10:55,102 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 1437 Invalid, 1699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 902 Invalid, 0 Unknown, 783 Unchecked, 0.4s Time] [2021-12-07 01:10:55,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 966 states. [2021-12-07 01:10:55,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 966 to 825. [2021-12-07 01:10:55,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 825 states, 702 states have (on average 1.2037037037037037) internal successors, (845), 756 states have internal predecessors, (845), 38 states have call successors, (38), 31 states have call predecessors, (38), 31 states have return successors, (38), 37 states have call predecessors, (38), 38 states have call successors, (38) [2021-12-07 01:10:55,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 825 states to 825 states and 921 transitions. [2021-12-07 01:10:55,110 INFO L78 Accepts]: Start accepts. Automaton has 825 states and 921 transitions. Word has length 123 [2021-12-07 01:10:55,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:10:55,111 INFO L470 AbstractCegarLoop]: Abstraction has 825 states and 921 transitions. [2021-12-07 01:10:55,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 19 states have internal predecessors, (73), 5 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-07 01:10:55,111 INFO L276 IsEmpty]: Start isEmpty. Operand 825 states and 921 transitions. [2021-12-07 01:10:55,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-12-07 01:10:55,111 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:10:55,111 INFO L514 BasicCegarLoop]: trace histogram [26, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:10:55,137 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2021-12-07 01:10:55,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-12-07 01:10:55,313 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-12-07 01:10:55,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:10:55,314 INFO L85 PathProgramCache]: Analyzing trace with hash 991893615, now seen corresponding path program 1 times [2021-12-07 01:10:55,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:10:55,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957644746] [2021-12-07 01:10:55,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:10:55,315 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:10:55,383 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 01:10:55,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1733634712] [2021-12-07 01:10:55,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:10:55,384 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:10:55,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:10:55,385 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:10:55,386 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-12-07 01:10:55,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:10:55,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 1103 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-07 01:10:55,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:10:55,762 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2021-12-07 01:10:55,762 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:10:55,762 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:10:55,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957644746] [2021-12-07 01:10:55,762 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 01:10:55,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733634712] [2021-12-07 01:10:55,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733634712] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:10:55,763 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:10:55,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-07 01:10:55,763 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459424482] [2021-12-07 01:10:55,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:10:55,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 01:10:55,763 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:10:55,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 01:10:55,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:10:55,763 INFO L87 Difference]: Start difference. First operand 825 states and 921 transitions. Second operand has 3 states, 2 states have (on average 24.0) internal successors, (48), 3 states have internal predecessors, (48), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-07 01:10:55,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:10:55,832 INFO L93 Difference]: Finished difference Result 852 states and 949 transitions. [2021-12-07 01:10:55,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 01:10:55,832 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 24.0) internal successors, (48), 3 states have internal predecessors, (48), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 125 [2021-12-07 01:10:55,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:10:55,835 INFO L225 Difference]: With dead ends: 852 [2021-12-07 01:10:55,835 INFO L226 Difference]: Without dead ends: 852 [2021-12-07 01:10:55,835 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 123 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 01:10:55,835 INFO L933 BasicCegarLoop]: 159 mSDtfsCounter, 51 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 01:10:55,836 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 259 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 01:10:55,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 852 states. [2021-12-07 01:10:55,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 852 to 824. [2021-12-07 01:10:55,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 824 states, 702 states have (on average 1.2022792022792024) internal successors, (844), 755 states have internal predecessors, (844), 38 states have call successors, (38), 31 states have call predecessors, (38), 31 states have return successors, (38), 37 states have call predecessors, (38), 38 states have call successors, (38) [2021-12-07 01:10:55,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 824 states to 824 states and 920 transitions. [2021-12-07 01:10:55,847 INFO L78 Accepts]: Start accepts. Automaton has 824 states and 920 transitions. Word has length 125 [2021-12-07 01:10:55,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:10:55,847 INFO L470 AbstractCegarLoop]: Abstraction has 824 states and 920 transitions. [2021-12-07 01:10:55,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 24.0) internal successors, (48), 3 states have internal predecessors, (48), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-07 01:10:55,847 INFO L276 IsEmpty]: Start isEmpty. Operand 824 states and 920 transitions. [2021-12-07 01:10:55,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-12-07 01:10:55,848 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:10:55,848 INFO L514 BasicCegarLoop]: trace histogram [26, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:10:55,869 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2021-12-07 01:10:56,048 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-12-07 01:10:56,049 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr25REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-12-07 01:10:56,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:10:56,050 INFO L85 PathProgramCache]: Analyzing trace with hash 991893616, now seen corresponding path program 1 times [2021-12-07 01:10:56,051 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:10:56,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868694116] [2021-12-07 01:10:56,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:10:56,052 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:10:56,114 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 01:10:56,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1949288750] [2021-12-07 01:10:56,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:10:56,114 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:10:56,114 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:10:56,115 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:10:56,117 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-12-07 01:10:56,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:10:56,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 1103 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-07 01:10:56,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:10:56,527 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2021-12-07 01:10:56,527 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:10:56,527 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:10:56,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868694116] [2021-12-07 01:10:56,527 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 01:10:56,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949288750] [2021-12-07 01:10:56,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949288750] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:10:56,528 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:10:56,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-07 01:10:56,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214798116] [2021-12-07 01:10:56,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:10:56,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 01:10:56,528 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:10:56,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 01:10:56,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:10:56,529 INFO L87 Difference]: Start difference. First operand 824 states and 920 transitions. Second operand has 3 states, 2 states have (on average 24.0) internal successors, (48), 3 states have internal predecessors, (48), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-07 01:10:56,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:10:56,633 INFO L93 Difference]: Finished difference Result 825 states and 922 transitions. [2021-12-07 01:10:56,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 01:10:56,633 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 24.0) internal successors, (48), 3 states have internal predecessors, (48), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 125 [2021-12-07 01:10:56,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:10:56,636 INFO L225 Difference]: With dead ends: 825 [2021-12-07 01:10:56,636 INFO L226 Difference]: Without dead ends: 825 [2021-12-07 01:10:56,636 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 123 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 01:10:56,636 INFO L933 BasicCegarLoop]: 152 mSDtfsCounter, 107 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 01:10:56,636 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 200 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 01:10:56,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 825 states. [2021-12-07 01:10:56,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 825 to 823. [2021-12-07 01:10:56,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 823 states, 702 states have (on average 1.2008547008547008) internal successors, (843), 754 states have internal predecessors, (843), 38 states have call successors, (38), 31 states have call predecessors, (38), 31 states have return successors, (38), 37 states have call predecessors, (38), 38 states have call successors, (38) [2021-12-07 01:10:56,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 823 states to 823 states and 919 transitions. [2021-12-07 01:10:56,644 INFO L78 Accepts]: Start accepts. Automaton has 823 states and 919 transitions. Word has length 125 [2021-12-07 01:10:56,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:10:56,645 INFO L470 AbstractCegarLoop]: Abstraction has 823 states and 919 transitions. [2021-12-07 01:10:56,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 24.0) internal successors, (48), 3 states have internal predecessors, (48), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-07 01:10:56,645 INFO L276 IsEmpty]: Start isEmpty. Operand 823 states and 919 transitions. [2021-12-07 01:10:56,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-12-07 01:10:56,645 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:10:56,645 INFO L514 BasicCegarLoop]: trace histogram [26, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:10:56,667 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2021-12-07 01:10:56,846 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-12-07 01:10:56,846 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr27REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-12-07 01:10:56,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:10:56,847 INFO L85 PathProgramCache]: Analyzing trace with hash -334021032, now seen corresponding path program 1 times [2021-12-07 01:10:56,847 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:10:56,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069110941] [2021-12-07 01:10:56,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:10:56,848 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:10:56,898 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 01:10:56,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [308499] [2021-12-07 01:10:56,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:10:56,899 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:10:56,899 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:10:56,900 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:10:56,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-12-07 01:10:57,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:10:57,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 1124 conjuncts, 123 conjunts are in the unsatisfiable core [2021-12-07 01:10:57,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:10:57,375 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-07 01:10:57,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-12-07 01:10:57,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 14 [2021-12-07 01:10:57,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:10:57,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 14 [2021-12-07 01:10:57,557 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-07 01:10:57,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-12-07 01:10:57,746 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 01:10:57,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 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 12 treesize of output 18 [2021-12-07 01:10:57,767 INFO L354 Elim1Store]: treesize reduction 28, result has 28.2 percent of original size [2021-12-07 01:10:57,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 22 [2021-12-07 01:10:58,009 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 01:10:58,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 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 16 treesize of output 22 [2021-12-07 01:10:58,049 INFO L354 Elim1Store]: treesize reduction 58, result has 21.6 percent of original size [2021-12-07 01:10:58,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 30 [2021-12-07 01:10:58,319 INFO L354 Elim1Store]: treesize reduction 96, result has 17.9 percent of original size [2021-12-07 01:10:58,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 27 treesize of output 38 [2021-12-07 01:10:58,342 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 01:10:58,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 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 19 treesize of output 25 [2021-12-07 01:10:58,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:10:58,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 22 treesize of output 24 [2021-12-07 01:10:58,711 INFO L354 Elim1Store]: treesize reduction 92, result has 18.6 percent of original size [2021-12-07 01:10:58,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 14 case distinctions, treesize of input 31 treesize of output 39 [2021-12-07 01:11:00,800 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 32 proven. 402 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2021-12-07 01:11:00,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:11:01,765 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:11:01,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069110941] [2021-12-07 01:11:01,765 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 01:11:01,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308499] [2021-12-07 01:11:01,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308499] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:11:01,765 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-07 01:11:01,765 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2021-12-07 01:11:01,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578684549] [2021-12-07 01:11:01,765 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-07 01:11:01,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-12-07 01:11:01,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:11:01,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-12-07 01:11:01,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1054, Unknown=0, NotChecked=0, Total=1190 [2021-12-07 01:11:01,767 INFO L87 Difference]: Start difference. First operand 823 states and 919 transitions. Second operand has 28 states, 25 states have (on average 3.16) internal successors, (79), 22 states have internal predecessors, (79), 5 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-07 01:11:02,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:11:02,272 INFO L93 Difference]: Finished difference Result 904 states and 1013 transitions. [2021-12-07 01:11:02,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-07 01:11:02,272 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 25 states have (on average 3.16) internal successors, (79), 22 states have internal predecessors, (79), 5 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 129 [2021-12-07 01:11:02,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:11:02,275 INFO L225 Difference]: With dead ends: 904 [2021-12-07 01:11:02,275 INFO L226 Difference]: Without dead ends: 904 [2021-12-07 01:11:02,275 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 102 SyntacticMatches, 25 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=195, Invalid=1697, Unknown=0, NotChecked=0, Total=1892 [2021-12-07 01:11:02,276 INFO L933 BasicCegarLoop]: 155 mSDtfsCounter, 21 mSDsluCounter, 1905 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 2060 SdHoareTripleChecker+Invalid, 1577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1400 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 01:11:02,276 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 2060 Invalid, 1577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 169 Invalid, 0 Unknown, 1400 Unchecked, 0.1s Time] [2021-12-07 01:11:02,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 904 states. [2021-12-07 01:11:02,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 904 to 885. [2021-12-07 01:11:02,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 885 states, 756 states have (on average 1.1944444444444444) internal successors, (903), 809 states have internal predecessors, (903), 45 states have call successors, (45), 32 states have call predecessors, (45), 32 states have return successors, (45), 43 states have call predecessors, (45), 45 states have call successors, (45) [2021-12-07 01:11:02,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 885 states to 885 states and 993 transitions. [2021-12-07 01:11:02,285 INFO L78 Accepts]: Start accepts. Automaton has 885 states and 993 transitions. Word has length 129 [2021-12-07 01:11:02,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:11:02,285 INFO L470 AbstractCegarLoop]: Abstraction has 885 states and 993 transitions. [2021-12-07 01:11:02,285 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 25 states have (on average 3.16) internal successors, (79), 22 states have internal predecessors, (79), 5 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-07 01:11:02,285 INFO L276 IsEmpty]: Start isEmpty. Operand 885 states and 993 transitions. [2021-12-07 01:11:02,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-12-07 01:11:02,286 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:11:02,286 INFO L514 BasicCegarLoop]: trace histogram [26, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:11:02,319 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2021-12-07 01:11:02,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-12-07 01:11:02,487 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr26REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-12-07 01:11:02,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:11:02,488 INFO L85 PathProgramCache]: Analyzing trace with hash -334021033, now seen corresponding path program 1 times [2021-12-07 01:11:02,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:11:02,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784764630] [2021-12-07 01:11:02,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:11:02,489 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:11:02,584 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 01:11:02,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1418576635] [2021-12-07 01:11:02,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:11:02,584 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:11:02,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:11:02,585 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:11:02,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-12-07 01:11:02,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:11:02,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 1124 conjuncts, 51 conjunts are in the unsatisfiable core [2021-12-07 01:11:02,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:11:02,951 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-07 01:11:02,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 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 12 treesize of output 14 [2021-12-07 01:11:03,015 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-07 01:11:03,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 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 12 treesize of output 14 [2021-12-07 01:11:03,081 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-07 01:11:03,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 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 12 treesize of output 14 [2021-12-07 01:11:03,147 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-07 01:11:03,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 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 12 treesize of output 14 [2021-12-07 01:11:03,214 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-07 01:11:03,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 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 12 treesize of output 14 [2021-12-07 01:11:03,281 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-07 01:11:03,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 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 12 treesize of output 14 [2021-12-07 01:11:03,343 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2021-12-07 01:11:03,343 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:11:03,343 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:11:03,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784764630] [2021-12-07 01:11:03,344 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 01:11:03,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418576635] [2021-12-07 01:11:03,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418576635] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:11:03,344 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:11:03,344 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-07 01:11:03,344 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210968048] [2021-12-07 01:11:03,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:11:03,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-07 01:11:03,344 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:11:03,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-07 01:11:03,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-07 01:11:03,345 INFO L87 Difference]: Start difference. First operand 885 states and 993 transitions. Second operand has 7 states, 6 states have (on average 8.666666666666666) internal successors, (52), 5 states have internal predecessors, (52), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-07 01:11:03,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:11:03,484 INFO L93 Difference]: Finished difference Result 1615 states and 1805 transitions. [2021-12-07 01:11:03,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-07 01:11:03,485 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 8.666666666666666) internal successors, (52), 5 states have internal predecessors, (52), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 129 [2021-12-07 01:11:03,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:11:03,489 INFO L225 Difference]: With dead ends: 1615 [2021-12-07 01:11:03,491 INFO L226 Difference]: Without dead ends: 1615 [2021-12-07 01:11:03,491 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 112 SyntacticMatches, 11 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-12-07 01:11:03,492 INFO L933 BasicCegarLoop]: 136 mSDtfsCounter, 56 mSDsluCounter, 436 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 572 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 143 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 01:11:03,492 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 572 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 172 Invalid, 0 Unknown, 143 Unchecked, 0.1s Time] [2021-12-07 01:11:03,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1615 states. [2021-12-07 01:11:03,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1615 to 1565. [2021-12-07 01:11:03,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1565 states, 1373 states have (on average 1.1755280407865987) internal successors, (1614), 1427 states have internal predecessors, (1614), 77 states have call successors, (77), 63 states have call predecessors, (77), 63 states have return successors, (77), 74 states have call predecessors, (77), 77 states have call successors, (77) [2021-12-07 01:11:03,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1565 states to 1565 states and 1768 transitions. [2021-12-07 01:11:03,515 INFO L78 Accepts]: Start accepts. Automaton has 1565 states and 1768 transitions. Word has length 129 [2021-12-07 01:11:03,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:11:03,516 INFO L470 AbstractCegarLoop]: Abstraction has 1565 states and 1768 transitions. [2021-12-07 01:11:03,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 8.666666666666666) internal successors, (52), 5 states have internal predecessors, (52), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-07 01:11:03,516 INFO L276 IsEmpty]: Start isEmpty. Operand 1565 states and 1768 transitions. [2021-12-07 01:11:03,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-12-07 01:11:03,517 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:11:03,517 INFO L514 BasicCegarLoop]: trace histogram [26, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:11:03,539 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-12-07 01:11:03,718 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-12-07 01:11:03,718 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-12-07 01:11:03,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:11:03,720 INFO L85 PathProgramCache]: Analyzing trace with hash -1764717332, now seen corresponding path program 1 times [2021-12-07 01:11:03,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:11:03,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016188851] [2021-12-07 01:11:03,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:11:03,721 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:11:03,814 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 01:11:03,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [977346005] [2021-12-07 01:11:03,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:11:03,814 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:11:03,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:11:03,815 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:11:03,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-12-07 01:11:04,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:11:04,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 1132 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-07 01:11:04,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:11:04,206 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2021-12-07 01:11:04,206 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:11:04,207 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:11:04,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016188851] [2021-12-07 01:11:04,207 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 01:11:04,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977346005] [2021-12-07 01:11:04,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977346005] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:11:04,207 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:11:04,207 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 01:11:04,207 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830980805] [2021-12-07 01:11:04,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:11:04,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-07 01:11:04,208 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:11:04,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-07 01:11:04,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-07 01:11:04,208 INFO L87 Difference]: Start difference. First operand 1565 states and 1768 transitions. Second operand has 4 states, 3 states have (on average 17.666666666666668) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-07 01:11:04,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:11:04,314 INFO L93 Difference]: Finished difference Result 1590 states and 1792 transitions. [2021-12-07 01:11:04,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-07 01:11:04,314 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 17.666666666666668) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 130 [2021-12-07 01:11:04,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:11:04,319 INFO L225 Difference]: With dead ends: 1590 [2021-12-07 01:11:04,319 INFO L226 Difference]: Without dead ends: 1590 [2021-12-07 01:11:04,319 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 127 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 01:11:04,319 INFO L933 BasicCegarLoop]: 154 mSDtfsCounter, 188 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 01:11:04,319 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 266 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 01:11:04,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1590 states. [2021-12-07 01:11:04,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1590 to 1564. [2021-12-07 01:11:04,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1564 states, 1373 states have (on average 1.1740713765477058) internal successors, (1612), 1426 states have internal predecessors, (1612), 77 states have call successors, (77), 63 states have call predecessors, (77), 63 states have return successors, (77), 74 states have call predecessors, (77), 77 states have call successors, (77) [2021-12-07 01:11:04,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1564 states to 1564 states and 1766 transitions. [2021-12-07 01:11:04,335 INFO L78 Accepts]: Start accepts. Automaton has 1564 states and 1766 transitions. Word has length 130 [2021-12-07 01:11:04,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:11:04,335 INFO L470 AbstractCegarLoop]: Abstraction has 1564 states and 1766 transitions. [2021-12-07 01:11:04,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 17.666666666666668) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-07 01:11:04,335 INFO L276 IsEmpty]: Start isEmpty. Operand 1564 states and 1766 transitions. [2021-12-07 01:11:04,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-12-07 01:11:04,335 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:11:04,336 INFO L514 BasicCegarLoop]: trace histogram [26, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:11:04,358 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-12-07 01:11:04,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:11:04,537 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr29REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-12-07 01:11:04,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:11:04,538 INFO L85 PathProgramCache]: Analyzing trace with hash -1764717331, now seen corresponding path program 1 times [2021-12-07 01:11:04,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:11:04,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253453511] [2021-12-07 01:11:04,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:11:04,539 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:11:04,636 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 01:11:04,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [561686305] [2021-12-07 01:11:04,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:11:04,637 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:11:04,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:11:04,638 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:11:04,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-12-07 01:11:04,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:11:04,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 1132 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-07 01:11:04,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:11:05,243 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 170 refuted. 0 times theorem prover too weak. 446 trivial. 0 not checked. [2021-12-07 01:11:05,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:11:05,304 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 01:11:05,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2021-12-07 01:11:05,662 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 170 refuted. 0 times theorem prover too weak. 446 trivial. 0 not checked. [2021-12-07 01:11:05,662 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:11:05,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253453511] [2021-12-07 01:11:05,662 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 01:11:05,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561686305] [2021-12-07 01:11:05,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561686305] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:11:05,662 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:11:05,662 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-12-07 01:11:05,662 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603525156] [2021-12-07 01:11:05,663 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:11:05,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-07 01:11:05,663 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:11:05,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-07 01:11:05,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-12-07 01:11:05,663 INFO L87 Difference]: Start difference. First operand 1564 states and 1766 transitions. Second operand has 18 states, 17 states have (on average 6.588235294117647) internal successors, (112), 16 states have internal predecessors, (112), 3 states have call successors, (11), 1 states have call predecessors, (11), 3 states have return successors, (12), 4 states have call predecessors, (12), 3 states have call successors, (12) [2021-12-07 01:11:05,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:11:05,840 INFO L93 Difference]: Finished difference Result 1563 states and 1764 transitions. [2021-12-07 01:11:05,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-07 01:11:05,841 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 6.588235294117647) internal successors, (112), 16 states have internal predecessors, (112), 3 states have call successors, (11), 1 states have call predecessors, (11), 3 states have return successors, (12), 4 states have call predecessors, (12), 3 states have call successors, (12) Word has length 130 [2021-12-07 01:11:05,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:11:05,845 INFO L225 Difference]: With dead ends: 1563 [2021-12-07 01:11:05,845 INFO L226 Difference]: Without dead ends: 1563 [2021-12-07 01:11:05,846 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-12-07 01:11:05,846 INFO L933 BasicCegarLoop]: 142 mSDtfsCounter, 530 mSDsluCounter, 1042 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 530 SdHoareTripleChecker+Valid, 1184 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 01:11:05,846 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [530 Valid, 1184 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 01:11:05,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1563 states. [2021-12-07 01:11:05,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1563 to 1563. [2021-12-07 01:11:05,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1563 states, 1373 states have (on average 1.1726147123088129) internal successors, (1610), 1425 states have internal predecessors, (1610), 77 states have call successors, (77), 63 states have call predecessors, (77), 63 states have return successors, (77), 74 states have call predecessors, (77), 77 states have call successors, (77) [2021-12-07 01:11:05,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1563 states to 1563 states and 1764 transitions. [2021-12-07 01:11:05,861 INFO L78 Accepts]: Start accepts. Automaton has 1563 states and 1764 transitions. Word has length 130 [2021-12-07 01:11:05,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:11:05,861 INFO L470 AbstractCegarLoop]: Abstraction has 1563 states and 1764 transitions. [2021-12-07 01:11:05,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 6.588235294117647) internal successors, (112), 16 states have internal predecessors, (112), 3 states have call successors, (11), 1 states have call predecessors, (11), 3 states have return successors, (12), 4 states have call predecessors, (12), 3 states have call successors, (12) [2021-12-07 01:11:05,862 INFO L276 IsEmpty]: Start isEmpty. Operand 1563 states and 1764 transitions. [2021-12-07 01:11:05,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-12-07 01:11:05,862 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:11:05,862 INFO L514 BasicCegarLoop]: trace histogram [26, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:11:05,884 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2021-12-07 01:11:06,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-12-07 01:11:06,063 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr31REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-12-07 01:11:06,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:11:06,064 INFO L85 PathProgramCache]: Analyzing trace with hash 618729134, now seen corresponding path program 1 times [2021-12-07 01:11:06,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:11:06,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697984960] [2021-12-07 01:11:06,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:11:06,066 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:11:06,170 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 01:11:06,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1089160654] [2021-12-07 01:11:06,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:11:06,170 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:11:06,170 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:11:06,171 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:11:06,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-12-07 01:11:06,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:11:06,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 1149 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-07 01:11:06,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:11:06,583 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2021-12-07 01:11:06,583 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:11:06,583 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:11:06,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697984960] [2021-12-07 01:11:06,584 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 01:11:06,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089160654] [2021-12-07 01:11:06,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089160654] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:11:06,584 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:11:06,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-07 01:11:06,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48078920] [2021-12-07 01:11:06,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:11:06,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 01:11:06,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:11:06,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 01:11:06,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:11:06,588 INFO L87 Difference]: Start difference. First operand 1563 states and 1764 transitions. Second operand has 3 states, 2 states have (on average 27.5) internal successors, (55), 3 states have internal predecessors, (55), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-07 01:11:06,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:11:06,686 INFO L93 Difference]: Finished difference Result 1562 states and 1762 transitions. [2021-12-07 01:11:06,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 01:11:06,687 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 27.5) internal successors, (55), 3 states have internal predecessors, (55), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 132 [2021-12-07 01:11:06,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:11:06,691 INFO L225 Difference]: With dead ends: 1562 [2021-12-07 01:11:06,691 INFO L226 Difference]: Without dead ends: 1562 [2021-12-07 01:11:06,692 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 130 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 01:11:06,692 INFO L933 BasicCegarLoop]: 152 mSDtfsCounter, 92 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 01:11:06,692 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 206 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 01:11:06,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1562 states. [2021-12-07 01:11:06,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1562 to 1562. [2021-12-07 01:11:06,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1562 states, 1373 states have (on average 1.17115804806992) internal successors, (1608), 1424 states have internal predecessors, (1608), 77 states have call successors, (77), 63 states have call predecessors, (77), 63 states have return successors, (77), 74 states have call predecessors, (77), 77 states have call successors, (77) [2021-12-07 01:11:06,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1562 states to 1562 states and 1762 transitions. [2021-12-07 01:11:06,707 INFO L78 Accepts]: Start accepts. Automaton has 1562 states and 1762 transitions. Word has length 132 [2021-12-07 01:11:06,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:11:06,708 INFO L470 AbstractCegarLoop]: Abstraction has 1562 states and 1762 transitions. [2021-12-07 01:11:06,708 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 27.5) internal successors, (55), 3 states have internal predecessors, (55), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-07 01:11:06,708 INFO L276 IsEmpty]: Start isEmpty. Operand 1562 states and 1762 transitions. [2021-12-07 01:11:06,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-12-07 01:11:06,708 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:11:06,709 INFO L514 BasicCegarLoop]: trace histogram [26, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:11:06,731 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2021-12-07 01:11:06,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:11:06,910 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr32REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-12-07 01:11:06,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:11:06,911 INFO L85 PathProgramCache]: Analyzing trace with hash -1688061163, now seen corresponding path program 1 times [2021-12-07 01:11:06,911 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:11:06,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67115504] [2021-12-07 01:11:06,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:11:06,912 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:11:07,012 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 01:11:07,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1533456380] [2021-12-07 01:11:07,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:11:07,013 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:11:07,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:11:07,014 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:11:07,015 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-12-07 01:11:07,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:11:07,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 1170 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-07 01:11:07,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:11:07,617 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2021-12-07 01:11:07,617 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:11:07,618 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:11:07,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67115504] [2021-12-07 01:11:07,618 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 01:11:07,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533456380] [2021-12-07 01:11:07,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533456380] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:11:07,618 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:11:07,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 01:11:07,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354170084] [2021-12-07 01:11:07,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:11:07,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-07 01:11:07,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:11:07,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-07 01:11:07,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-07 01:11:07,619 INFO L87 Difference]: Start difference. First operand 1562 states and 1762 transitions. Second operand has 5 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-07 01:11:07,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:11:07,715 INFO L93 Difference]: Finished difference Result 1585 states and 1785 transitions. [2021-12-07 01:11:07,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-07 01:11:07,715 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 136 [2021-12-07 01:11:07,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:11:07,720 INFO L225 Difference]: With dead ends: 1585 [2021-12-07 01:11:07,720 INFO L226 Difference]: Without dead ends: 1585 [2021-12-07 01:11:07,720 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-12-07 01:11:07,721 INFO L933 BasicCegarLoop]: 125 mSDtfsCounter, 405 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 405 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 01:11:07,721 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [405 Valid, 184 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 01:11:07,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1585 states. [2021-12-07 01:11:07,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1585 to 1555. [2021-12-07 01:11:07,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1555 states, 1369 states have (on average 1.168736303871439) internal successors, (1600), 1417 states have internal predecessors, (1600), 77 states have call successors, (77), 63 states have call predecessors, (77), 63 states have return successors, (77), 74 states have call predecessors, (77), 77 states have call successors, (77) [2021-12-07 01:11:07,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1555 states to 1555 states and 1754 transitions. [2021-12-07 01:11:07,740 INFO L78 Accepts]: Start accepts. Automaton has 1555 states and 1754 transitions. Word has length 136 [2021-12-07 01:11:07,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:11:07,740 INFO L470 AbstractCegarLoop]: Abstraction has 1555 states and 1754 transitions. [2021-12-07 01:11:07,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-07 01:11:07,740 INFO L276 IsEmpty]: Start isEmpty. Operand 1555 states and 1754 transitions. [2021-12-07 01:11:07,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-12-07 01:11:07,741 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:11:07,741 INFO L514 BasicCegarLoop]: trace histogram [26, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:11:07,763 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-12-07 01:11:07,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:11:07,943 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr33REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-12-07 01:11:07,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:11:07,944 INFO L85 PathProgramCache]: Analyzing trace with hash -1688061162, now seen corresponding path program 1 times [2021-12-07 01:11:07,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:11:07,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620427820] [2021-12-07 01:11:07,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:11:07,945 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:11:08,002 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 01:11:08,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [139980789] [2021-12-07 01:11:08,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:11:08,002 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:11:08,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:11:08,003 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:11:08,009 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-12-07 01:11:08,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:11:08,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 1170 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-07 01:11:08,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:11:08,685 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2021-12-07 01:11:08,685 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:11:08,685 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:11:08,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620427820] [2021-12-07 01:11:08,685 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 01:11:08,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139980789] [2021-12-07 01:11:08,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139980789] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:11:08,685 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:11:08,685 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 01:11:08,685 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392353561] [2021-12-07 01:11:08,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:11:08,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-07 01:11:08,686 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:11:08,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-07 01:11:08,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-07 01:11:08,686 INFO L87 Difference]: Start difference. First operand 1555 states and 1754 transitions. Second operand has 5 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-07 01:11:08,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:11:08,789 INFO L93 Difference]: Finished difference Result 1556 states and 1755 transitions. [2021-12-07 01:11:08,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-07 01:11:08,790 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 136 [2021-12-07 01:11:08,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:11:08,794 INFO L225 Difference]: With dead ends: 1556 [2021-12-07 01:11:08,794 INFO L226 Difference]: Without dead ends: 1556 [2021-12-07 01:11:08,794 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-12-07 01:11:08,795 INFO L933 BasicCegarLoop]: 139 mSDtfsCounter, 240 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 01:11:08,795 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [240 Valid, 189 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 01:11:08,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1556 states. [2021-12-07 01:11:08,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1556 to 1554. [2021-12-07 01:11:08,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1554 states, 1369 states have (on average 1.1680058436815193) internal successors, (1599), 1416 states have internal predecessors, (1599), 77 states have call successors, (77), 63 states have call predecessors, (77), 63 states have return successors, (77), 74 states have call predecessors, (77), 77 states have call successors, (77) [2021-12-07 01:11:08,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1554 states to 1554 states and 1753 transitions. [2021-12-07 01:11:08,811 INFO L78 Accepts]: Start accepts. Automaton has 1554 states and 1753 transitions. Word has length 136 [2021-12-07 01:11:08,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:11:08,811 INFO L470 AbstractCegarLoop]: Abstraction has 1554 states and 1753 transitions. [2021-12-07 01:11:08,811 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-07 01:11:08,811 INFO L276 IsEmpty]: Start isEmpty. Operand 1554 states and 1753 transitions. [2021-12-07 01:11:08,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-12-07 01:11:08,812 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:11:08,812 INFO L514 BasicCegarLoop]: trace histogram [26, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:11:08,834 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2021-12-07 01:11:09,013 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-12-07 01:11:09,013 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr34REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-12-07 01:11:09,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:11:09,015 INFO L85 PathProgramCache]: Analyzing trace with hash 1270864121, now seen corresponding path program 1 times [2021-12-07 01:11:09,015 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:11:09,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140157558] [2021-12-07 01:11:09,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:11:09,016 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:11:09,073 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 01:11:09,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1906979340] [2021-12-07 01:11:09,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:11:09,073 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:11:09,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:11:09,074 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:11:09,075 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-12-07 01:11:09,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:11:09,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 1186 conjuncts, 35 conjunts are in the unsatisfiable core [2021-12-07 01:11:09,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:11:09,869 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 11 treesize of output 7 [2021-12-07 01:11:09,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-12-07 01:11:09,898 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2021-12-07 01:11:09,898 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:11:09,899 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:11:09,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140157558] [2021-12-07 01:11:09,899 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 01:11:09,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906979340] [2021-12-07 01:11:09,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906979340] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:11:09,899 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:11:09,899 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-07 01:11:09,899 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273578724] [2021-12-07 01:11:09,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:11:09,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-07 01:11:09,900 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:11:09,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-07 01:11:09,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-07 01:11:09,900 INFO L87 Difference]: Start difference. First operand 1554 states and 1753 transitions. Second operand has 8 states, 7 states have (on average 8.714285714285714) internal successors, (61), 7 states have internal predecessors, (61), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-07 01:11:10,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:11:10,129 INFO L93 Difference]: Finished difference Result 1604 states and 1803 transitions. [2021-12-07 01:11:10,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-07 01:11:10,129 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 8.714285714285714) internal successors, (61), 7 states have internal predecessors, (61), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 138 [2021-12-07 01:11:10,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:11:10,134 INFO L225 Difference]: With dead ends: 1604 [2021-12-07 01:11:10,134 INFO L226 Difference]: Without dead ends: 1604 [2021-12-07 01:11:10,134 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-12-07 01:11:10,135 INFO L933 BasicCegarLoop]: 143 mSDtfsCounter, 312 mSDsluCounter, 423 mSDsCounter, 0 mSdLazyCounter, 345 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 566 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-07 01:11:10,135 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [312 Valid, 566 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 345 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-07 01:11:10,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1604 states. [2021-12-07 01:11:10,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1604 to 1554. [2021-12-07 01:11:10,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1554 states, 1370 states have (on average 1.167883211678832) internal successors, (1600), 1416 states have internal predecessors, (1600), 77 states have call successors, (77), 63 states have call predecessors, (77), 63 states have return successors, (77), 74 states have call predecessors, (77), 77 states have call successors, (77) [2021-12-07 01:11:10,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1554 states to 1554 states and 1754 transitions. [2021-12-07 01:11:10,151 INFO L78 Accepts]: Start accepts. Automaton has 1554 states and 1754 transitions. Word has length 138 [2021-12-07 01:11:10,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:11:10,151 INFO L470 AbstractCegarLoop]: Abstraction has 1554 states and 1754 transitions. [2021-12-07 01:11:10,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 8.714285714285714) internal successors, (61), 7 states have internal predecessors, (61), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-07 01:11:10,151 INFO L276 IsEmpty]: Start isEmpty. Operand 1554 states and 1754 transitions. [2021-12-07 01:11:10,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-12-07 01:11:10,152 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:11:10,152 INFO L514 BasicCegarLoop]: trace histogram [26, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:11:10,175 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2021-12-07 01:11:10,352 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-12-07 01:11:10,353 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr35REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-12-07 01:11:10,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:11:10,353 INFO L85 PathProgramCache]: Analyzing trace with hash 1270864122, now seen corresponding path program 1 times [2021-12-07 01:11:10,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:11:10,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681476751] [2021-12-07 01:11:10,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:11:10,353 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:11:10,381 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 01:11:10,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1963424335] [2021-12-07 01:11:10,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:11:10,381 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:11:10,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:11:10,382 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:11:10,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-12-07 01:11:10,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:11:10,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 1186 conjuncts, 51 conjunts are in the unsatisfiable core [2021-12-07 01:11:10,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:11:11,534 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 11 treesize of output 7 [2021-12-07 01:11:11,537 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 11 treesize of output 7 [2021-12-07 01:11:11,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2021-12-07 01:11:11,591 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 26 treesize of output 14 [2021-12-07 01:11:11,636 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2021-12-07 01:11:11,636 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:11:11,636 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:11:11,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681476751] [2021-12-07 01:11:11,636 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 01:11:11,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963424335] [2021-12-07 01:11:11,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963424335] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:11:11,636 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:11:11,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-07 01:11:11,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642691273] [2021-12-07 01:11:11,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:11:11,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-07 01:11:11,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:11:11,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-07 01:11:11,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-12-07 01:11:11,638 INFO L87 Difference]: Start difference. First operand 1554 states and 1754 transitions. Second operand has 10 states, 9 states have (on average 6.777777777777778) internal successors, (61), 9 states have internal predecessors, (61), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-07 01:11:12,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:11:12,127 INFO L93 Difference]: Finished difference Result 1624 states and 1827 transitions. [2021-12-07 01:11:12,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-07 01:11:12,129 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 6.777777777777778) internal successors, (61), 9 states have internal predecessors, (61), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 138 [2021-12-07 01:11:12,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:11:12,134 INFO L225 Difference]: With dead ends: 1624 [2021-12-07 01:11:12,134 INFO L226 Difference]: Without dead ends: 1624 [2021-12-07 01:11:12,134 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-12-07 01:11:12,134 INFO L933 BasicCegarLoop]: 128 mSDtfsCounter, 1018 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1018 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-07 01:11:12,134 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1018 Valid, 402 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-07 01:11:12,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1624 states. [2021-12-07 01:11:12,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1624 to 1590. [2021-12-07 01:11:12,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1590 states, 1406 states have (on average 1.1849217638691323) internal successors, (1666), 1452 states have internal predecessors, (1666), 77 states have call successors, (77), 63 states have call predecessors, (77), 63 states have return successors, (77), 74 states have call predecessors, (77), 77 states have call successors, (77) [2021-12-07 01:11:12,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1590 states to 1590 states and 1820 transitions. [2021-12-07 01:11:12,154 INFO L78 Accepts]: Start accepts. Automaton has 1590 states and 1820 transitions. Word has length 138 [2021-12-07 01:11:12,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:11:12,154 INFO L470 AbstractCegarLoop]: Abstraction has 1590 states and 1820 transitions. [2021-12-07 01:11:12,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 6.777777777777778) internal successors, (61), 9 states have internal predecessors, (61), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-07 01:11:12,154 INFO L276 IsEmpty]: Start isEmpty. Operand 1590 states and 1820 transitions. [2021-12-07 01:11:12,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-12-07 01:11:12,155 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:11:12,155 INFO L514 BasicCegarLoop]: trace histogram [26, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:11:12,178 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-12-07 01:11:12,356 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:11:12,356 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr36REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-12-07 01:11:12,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:11:12,356 INFO L85 PathProgramCache]: Analyzing trace with hash 1529712317, now seen corresponding path program 1 times [2021-12-07 01:11:12,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:11:12,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208629840] [2021-12-07 01:11:12,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:11:12,357 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:11:12,381 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 01:11:12,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1307611736] [2021-12-07 01:11:12,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:11:12,381 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:11:12,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:11:12,382 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:11:12,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-12-07 01:11:12,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:11:12,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 1202 conjuncts, 97 conjunts are in the unsatisfiable core [2021-12-07 01:11:12,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:11:12,921 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-07 01:11:12,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-07 01:11:13,581 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 13 treesize of output 9 [2021-12-07 01:11:13,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:11:13,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-12-07 01:11:13,674 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 21 treesize of output 20 [2021-12-07 01:11:13,678 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 11 treesize of output 7 [2021-12-07 01:11:13,715 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 01:11:13,751 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 01:11:13,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 16 [2021-12-07 01:11:13,772 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 175 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2021-12-07 01:11:13,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:11:13,831 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 84 treesize of output 80 [2021-12-07 01:11:19,960 WARN L227 SmtUtils]: Spent 6.04s on a formula simplification. DAG size of input: 34 DAG size of output: 30 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-07 01:11:22,005 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_12062 Int) (v_arrayElimCell_238 Int)) (let ((.cse0 (let ((.cse1 (let ((.cse2 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_l0_insert_~item~4#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_l0_insert_~item~4#1.base|) |c_ULTIMATE.start_l0_insert_~item~4#1.offset| v_ArrVal_12062)))) (store .cse2 |c_ULTIMATE.start_l0_insert_~list#1.base| (store (select .cse2 |c_ULTIMATE.start_l0_insert_~list#1.base|) |c_ULTIMATE.start_l0_insert_~list#1.offset| |c_ULTIMATE.start_l0_insert_~item~4#1.base|))))) (select .cse1 (select (select .cse1 |c_~#list~0.base|) |c_~#list~0.offset|))))) (or (and (= |c_~#list~0.offset| |c_ULTIMATE.start_l0_insert_~list#1.offset|) (= |c_ULTIMATE.start_l0_insert_~list#1.base| |c_~#list~0.base|) (= (select |c_#valid| (select .cse0 (+ |c_ULTIMATE.start_l0_insert_~item~4#1.offset| 4))) 1)) (= (select |c_#valid| (select .cse0 (+ v_arrayElimCell_238 4))) 1)))) is different from false [2021-12-07 01:11:22,476 INFO L354 Elim1Store]: treesize reduction 196, result has 54.3 percent of original size [2021-12-07 01:11:22,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 10 new quantified variables, introduced 36 case distinctions, treesize of input 18992 treesize of output 18408 [2021-12-07 01:11:23,154 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:11:23,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208629840] [2021-12-07 01:11:23,154 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 01:11:23,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307611736] [2021-12-07 01:11:23,154 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-12-07 01:11:23,155 INFO L186 FreeRefinementEngine]: Found 0 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:11:23,155 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-12-07 01:11:23,155 ERROR L172 FreeRefinementEngine]: Strategy CAMEL failed to provide any proof altough trace is infeasible [2021-12-07 01:11:23,155 INFO L628 BasicCegarLoop]: Counterexample might be feasible [2021-12-07 01:11:23,159 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr36REQUIRES_VIOLATION (69 of 70 remaining) [2021-12-07 01:11:23,161 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATION (68 of 70 remaining) [2021-12-07 01:11:23,161 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATION (67 of 70 remaining) [2021-12-07 01:11:23,161 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATION (66 of 70 remaining) [2021-12-07 01:11:23,161 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATION (65 of 70 remaining) [2021-12-07 01:11:23,161 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATION (64 of 70 remaining) [2021-12-07 01:11:23,161 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATION (63 of 70 remaining) [2021-12-07 01:11:23,161 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATION (62 of 70 remaining) [2021-12-07 01:11:23,161 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATION (61 of 70 remaining) [2021-12-07 01:11:23,161 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATION (60 of 70 remaining) [2021-12-07 01:11:23,161 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATION (59 of 70 remaining) [2021-12-07 01:11:23,161 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATION (58 of 70 remaining) [2021-12-07 01:11:23,161 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATION (57 of 70 remaining) [2021-12-07 01:11:23,162 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12REQUIRES_VIOLATION (56 of 70 remaining) [2021-12-07 01:11:23,162 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATION (55 of 70 remaining) [2021-12-07 01:11:23,162 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATION (54 of 70 remaining) [2021-12-07 01:11:23,162 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15REQUIRES_VIOLATION (53 of 70 remaining) [2021-12-07 01:11:23,162 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr16REQUIRES_VIOLATION (52 of 70 remaining) [2021-12-07 01:11:23,162 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr17REQUIRES_VIOLATION (51 of 70 remaining) [2021-12-07 01:11:23,162 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr18REQUIRES_VIOLATION (50 of 70 remaining) [2021-12-07 01:11:23,162 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr19REQUIRES_VIOLATION (49 of 70 remaining) [2021-12-07 01:11:23,162 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr20REQUIRES_VIOLATION (48 of 70 remaining) [2021-12-07 01:11:23,162 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr21REQUIRES_VIOLATION (47 of 70 remaining) [2021-12-07 01:11:23,162 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr22REQUIRES_VIOLATION (46 of 70 remaining) [2021-12-07 01:11:23,162 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr23REQUIRES_VIOLATION (45 of 70 remaining) [2021-12-07 01:11:23,162 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr24REQUIRES_VIOLATION (44 of 70 remaining) [2021-12-07 01:11:23,162 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr25REQUIRES_VIOLATION (43 of 70 remaining) [2021-12-07 01:11:23,163 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr26REQUIRES_VIOLATION (42 of 70 remaining) [2021-12-07 01:11:23,163 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr27REQUIRES_VIOLATION (41 of 70 remaining) [2021-12-07 01:11:23,163 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr28REQUIRES_VIOLATION (40 of 70 remaining) [2021-12-07 01:11:23,163 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr29REQUIRES_VIOLATION (39 of 70 remaining) [2021-12-07 01:11:23,163 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr30REQUIRES_VIOLATION (38 of 70 remaining) [2021-12-07 01:11:23,163 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr31REQUIRES_VIOLATION (37 of 70 remaining) [2021-12-07 01:11:23,163 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr32REQUIRES_VIOLATION (36 of 70 remaining) [2021-12-07 01:11:23,163 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr33REQUIRES_VIOLATION (35 of 70 remaining) [2021-12-07 01:11:23,163 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr34REQUIRES_VIOLATION (34 of 70 remaining) [2021-12-07 01:11:23,163 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr35REQUIRES_VIOLATION (33 of 70 remaining) [2021-12-07 01:11:23,163 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr37REQUIRES_VIOLATION (32 of 70 remaining) [2021-12-07 01:11:23,163 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr38REQUIRES_VIOLATION (31 of 70 remaining) [2021-12-07 01:11:23,163 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr39REQUIRES_VIOLATION (30 of 70 remaining) [2021-12-07 01:11:23,163 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr40REQUIRES_VIOLATION (29 of 70 remaining) [2021-12-07 01:11:23,164 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr41REQUIRES_VIOLATION (28 of 70 remaining) [2021-12-07 01:11:23,164 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr42REQUIRES_VIOLATION (27 of 70 remaining) [2021-12-07 01:11:23,164 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr43REQUIRES_VIOLATION (26 of 70 remaining) [2021-12-07 01:11:23,164 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr44ASSERT_VIOLATIONMEMORY_FREE (25 of 70 remaining) [2021-12-07 01:11:23,164 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr45ASSERT_VIOLATIONMEMORY_FREE (24 of 70 remaining) [2021-12-07 01:11:23,164 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr46ASSERT_VIOLATIONMEMORY_FREE (23 of 70 remaining) [2021-12-07 01:11:23,164 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr47REQUIRES_VIOLATION (22 of 70 remaining) [2021-12-07 01:11:23,164 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr48REQUIRES_VIOLATION (21 of 70 remaining) [2021-12-07 01:11:23,164 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr49ASSERT_VIOLATIONMEMORY_FREE (20 of 70 remaining) [2021-12-07 01:11:23,164 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr50ASSERT_VIOLATIONMEMORY_FREE (19 of 70 remaining) [2021-12-07 01:11:23,164 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr51ASSERT_VIOLATIONMEMORY_FREE (18 of 70 remaining) [2021-12-07 01:11:23,164 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr52REQUIRES_VIOLATION (17 of 70 remaining) [2021-12-07 01:11:23,164 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr53REQUIRES_VIOLATION (16 of 70 remaining) [2021-12-07 01:11:23,165 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr54ASSERT_VIOLATIONMEMORY_FREE (15 of 70 remaining) [2021-12-07 01:11:23,165 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr55ASSERT_VIOLATIONMEMORY_FREE (14 of 70 remaining) [2021-12-07 01:11:23,165 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_FREE (13 of 70 remaining) [2021-12-07 01:11:23,165 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr57REQUIRES_VIOLATION (12 of 70 remaining) [2021-12-07 01:11:23,165 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr58REQUIRES_VIOLATION (11 of 70 remaining) [2021-12-07 01:11:23,165 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr59ASSERT_VIOLATIONMEMORY_FREE (10 of 70 remaining) [2021-12-07 01:11:23,165 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr60ASSERT_VIOLATIONMEMORY_FREE (9 of 70 remaining) [2021-12-07 01:11:23,165 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr61ASSERT_VIOLATIONMEMORY_FREE (8 of 70 remaining) [2021-12-07 01:11:23,165 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr62REQUIRES_VIOLATION (7 of 70 remaining) [2021-12-07 01:11:23,165 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr63REQUIRES_VIOLATION (6 of 70 remaining) [2021-12-07 01:11:23,165 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr64ASSERT_VIOLATIONMEMORY_FREE (5 of 70 remaining) [2021-12-07 01:11:23,165 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr65ASSERT_VIOLATIONMEMORY_FREE (4 of 70 remaining) [2021-12-07 01:11:23,165 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_FREE (3 of 70 remaining) [2021-12-07 01:11:23,165 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr67ASSERT_VIOLATIONMEMORY_LEAK (2 of 70 remaining) [2021-12-07 01:11:23,166 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location zalloc_or_dieErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE (1 of 70 remaining) [2021-12-07 01:11:23,166 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE (0 of 70 remaining) [2021-12-07 01:11:23,189 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2021-12-07 01:11:23,366 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:11:23,368 INFO L732 BasicCegarLoop]: Path program histogram: [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:11:23,370 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-07 01:11:23,385 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.12 01:11:23 BoogieIcfgContainer [2021-12-07 01:11:23,385 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-07 01:11:23,386 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-07 01:11:23,386 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-07 01:11:23,386 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-07 01:11:23,386 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 01:08:11" (3/4) ... [2021-12-07 01:11:23,388 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-12-07 01:11:23,388 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-07 01:11:23,389 INFO L158 Benchmark]: Toolchain (without parser) took 192504.77ms. Allocated memory was 90.2MB in the beginning and 406.8MB in the end (delta: 316.7MB). Free memory was 52.1MB in the beginning and 83.0MB in the end (delta: -30.9MB). Peak memory consumption was 285.4MB. Max. memory is 16.1GB. [2021-12-07 01:11:23,389 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 90.2MB. Free memory was 70.2MB in the beginning and 70.2MB in the end (delta: 77.0kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-07 01:11:23,389 INFO L158 Benchmark]: CACSL2BoogieTranslator took 351.35ms. Allocated memory is still 90.2MB. Free memory was 51.8MB in the beginning and 55.0MB in the end (delta: -3.1MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2021-12-07 01:11:23,389 INFO L158 Benchmark]: Boogie Procedure Inliner took 39.63ms. Allocated memory is still 90.2MB. Free memory was 55.0MB in the beginning and 52.5MB in the end (delta: 2.4MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-12-07 01:11:23,389 INFO L158 Benchmark]: Boogie Preprocessor took 27.47ms. Allocated memory is still 90.2MB. Free memory was 52.2MB in the beginning and 50.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-07 01:11:23,389 INFO L158 Benchmark]: RCFGBuilder took 487.52ms. Allocated memory was 90.2MB in the beginning and 109.1MB in the end (delta: 18.9MB). Free memory was 50.1MB in the beginning and 78.0MB in the end (delta: -28.0MB). Peak memory consumption was 23.8MB. Max. memory is 16.1GB. [2021-12-07 01:11:23,389 INFO L158 Benchmark]: TraceAbstraction took 191590.88ms. Allocated memory was 109.1MB in the beginning and 406.8MB in the end (delta: 297.8MB). Free memory was 77.4MB in the beginning and 83.0MB in the end (delta: -5.6MB). Peak memory consumption was 305.9MB. Max. memory is 16.1GB. [2021-12-07 01:11:23,389 INFO L158 Benchmark]: Witness Printer took 2.65ms. Allocated memory is still 406.8MB. Free memory is still 83.0MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-07 01:11:23,390 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 90.2MB. Free memory was 70.2MB in the beginning and 70.2MB in the end (delta: 77.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 351.35ms. Allocated memory is still 90.2MB. Free memory was 51.8MB in the beginning and 55.0MB in the end (delta: -3.1MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 39.63ms. Allocated memory is still 90.2MB. Free memory was 55.0MB in the beginning and 52.5MB in the end (delta: 2.4MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 27.47ms. Allocated memory is still 90.2MB. Free memory was 52.2MB in the beginning and 50.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 487.52ms. Allocated memory was 90.2MB in the beginning and 109.1MB in the end (delta: 18.9MB). Free memory was 50.1MB in the beginning and 78.0MB in the end (delta: -28.0MB). Peak memory consumption was 23.8MB. Max. memory is 16.1GB. * TraceAbstraction took 191590.88ms. Allocated memory was 109.1MB in the beginning and 406.8MB in the end (delta: 297.8MB). Free memory was 77.4MB in the beginning and 83.0MB in the end (delta: -5.6MB). Peak memory consumption was 305.9MB. Max. memory is 16.1GB. * Witness Printer took 2.65ms. Allocated memory is still 406.8MB. Free memory is still 83.0MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 747]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L766] static struct L0 *list; [L768] CALL l0_insert(&list) [L708] CALL, EXPR zalloc_or_die(sizeof *item) [L667] CALL, EXPR calloc_model(1U, size) [L641] void *ptr = malloc(nmemb * size); [L642] EXPR, FCALL memset(ptr, 0, nmemb * size) [L642] return memset(ptr, 0, nmemb * size); [L667] RET, EXPR calloc_model(1U, size) [L667] void *ptr = calloc_model(1U, size); [L668] COND TRUE \read(*ptr) [L669] return ptr; [L708] RET, EXPR zalloc_or_die(sizeof *item) [L708] struct L0 *item = zalloc_or_die(sizeof *item); [L710] CALL l1_insert(&item->down) [L699] CALL, EXPR zalloc_or_die(sizeof *item) [L667] CALL, EXPR calloc_model(1U, size) [L641] void *ptr = malloc(nmemb * size); [L642] EXPR, FCALL memset(ptr, 0, nmemb * size) [L642] return memset(ptr, 0, nmemb * size); [L667] RET, EXPR calloc_model(1U, size) [L667] void *ptr = calloc_model(1U, size); [L668] COND TRUE \read(*ptr) [L669] return ptr; [L699] RET, EXPR zalloc_or_die(sizeof *item) [L699] struct L1 *item = zalloc_or_die(sizeof *item); [L701] CALL l2_insert(&item->down) [L690] CALL, EXPR zalloc_or_die(sizeof *item) [L667] CALL, EXPR calloc_model(1U, size) [L641] void *ptr = malloc(nmemb * size); [L642] EXPR, FCALL memset(ptr, 0, nmemb * size) [L642] return memset(ptr, 0, nmemb * size); [L667] RET, EXPR calloc_model(1U, size) [L667] void *ptr = calloc_model(1U, size); [L668] COND TRUE \read(*ptr) [L669] return ptr; [L690] RET, EXPR zalloc_or_die(sizeof *item) [L690] struct L2 *item = zalloc_or_die(sizeof *item); [L692] CALL l3_insert(&item->down) [L681] CALL, EXPR zalloc_or_die(sizeof *item) [L667] CALL, EXPR calloc_model(1U, size) [L641] void *ptr = malloc(nmemb * size); [L642] EXPR, FCALL memset(ptr, 0, nmemb * size) [L642] return memset(ptr, 0, nmemb * size); [L667] RET, EXPR calloc_model(1U, size) [L667] void *ptr = calloc_model(1U, size); [L668] COND TRUE \read(*ptr) [L669] return ptr; [L681] RET, EXPR zalloc_or_die(sizeof *item) [L681] struct L3 *item = zalloc_or_die(sizeof *item); [L683] CALL l4_insert(&item->down) [L674] CALL, EXPR zalloc_or_die(sizeof *item) [L667] CALL, EXPR calloc_model(1U, size) [L641] void *ptr = malloc(nmemb * size); [L642] EXPR, FCALL memset(ptr, 0, nmemb * size) [L642] return memset(ptr, 0, nmemb * size); [L667] RET, EXPR calloc_model(1U, size) [L667] void *ptr = calloc_model(1U, size); [L668] COND TRUE \read(*ptr) [L669] return ptr; [L674] RET, EXPR zalloc_or_die(sizeof *item) [L674] struct L4 *item = zalloc_or_die(sizeof *item); [L675] CALL, EXPR zalloc_or_die(119U) [L667] CALL, EXPR calloc_model(1U, size) [L641] void *ptr = malloc(nmemb * size); [L642] EXPR, FCALL memset(ptr, 0, nmemb * size) [L642] return memset(ptr, 0, nmemb * size); [L667] RET, EXPR calloc_model(1U, size) [L667] void *ptr = calloc_model(1U, size); [L668] COND TRUE \read(*ptr) [L669] return ptr; [L675] RET, EXPR zalloc_or_die(119U) [L675] item->down = zalloc_or_die(119U) [L676] EXPR \read(**list) [L676] item->next = *list [L677] *list = item [L683] RET l4_insert(&item->down) [L684] COND FALSE !(__VERIFIER_nondet_int()) [L685] EXPR \read(**list) [L685] item->next = *list [L686] *list = item [L692] RET l3_insert(&item->down) [L693] COND FALSE !(__VERIFIER_nondet_int()) [L694] EXPR \read(**list) [L694] item->next = *list [L695] *list = item [L701] RET l2_insert(&item->down) [L702] COND FALSE !(__VERIFIER_nondet_int()) [L703] EXPR \read(**list) [L703] item->next = *list [L704] *list = item [L710] RET l1_insert(&item->down) [L711] COND FALSE !(__VERIFIER_nondet_int()) [L712] EXPR \read(**list) [L712] item->next = *list [L713] *list = item [L768] RET l0_insert(&list) [L769] COND FALSE !(__VERIFIER_nondet_int()) [L770] EXPR \read(*list) [L770] CALL l0_destroy(list) [L757] EXPR list->down [L757] CALL l1_destroy(list->down) [L747] list->down - UnprovableResult [Line: 675]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 675]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 676]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 676]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 676]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 676]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 677]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 677]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 685]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 685]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 685]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 685]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 686]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 686]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 694]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 694]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 694]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 694]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 695]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 695]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 703]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 703]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 703]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 703]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 704]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 704]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 712]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 712]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 712]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 712]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 713]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 713]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 770]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 770]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 757]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 757]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 747]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 737]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 737]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 727]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 727]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 718]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 718]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 719]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 719]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 719]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 728]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 728]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 729]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 729]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 729]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 738]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 738]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 739]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 739]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 739]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 748]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 748]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 749]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 749]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 749]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 758]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 758]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 759]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 759]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 759]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 764]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 182 locations, 70 error locations. Started 1 CEGAR loops. OverallTime: 191.5s, OverallIterations: 48, TraceHistogramMax: 26, PathProgramHistogramMax: 7, EmptinessCheckTime: 0.0s, AutomataDifference: 53.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 7109 SdHoareTripleChecker+Valid, 7.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 7102 mSDsluCounter, 46706 SdHoareTripleChecker+Invalid, 6.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 15005 IncrementalHoareTripleChecker+Unchecked, 39251 mSDsCounter, 319 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 13186 IncrementalHoareTripleChecker+Invalid, 28510 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 319 mSolverCounterUnsat, 7455 mSDtfsCounter, 13186 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 5870 GetRequests, 4998 SyntacticMatches, 90 SemanticMatches, 782 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2968 ImplicationChecksByTransitivity, 81.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1590occurred in iteration=47, InterpolantAutomatonStates: 545, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 47 MinimizatonAttempts, 1553 StatesRemovedByMinimization, 37 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.3s SsaConstructionTime, 8.3s SatisfiabilityAnalysisTime, 111.1s InterpolantComputationTime, 4729 NumberOfCodeBlocks, 4536 NumberOfCodeBlocksAsserted, 55 NumberOfCheckSat, 5487 ConstructedInterpolants, 1124 QuantifiedInterpolants, 42339 SizeOfPredicates, 660 NumberOfNonLiveVariables, 37811 ConjunctsInSsa, 2192 ConjunctsInUnsatCore, 57 InterpolantComputations, 20 PerfectInterpolantSequences, 16993/20766 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-12-07 01:11:23,482 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/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_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety/test-0234-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/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 3248e88e6fd49fdcf0a9f78f1aa9e69276951d353f75f39f6bb30d51b2e53989 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-07 01:11:24,957 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-07 01:11:24,959 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-07 01:11:24,980 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-07 01:11:24,981 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-07 01:11:24,982 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-07 01:11:24,983 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-07 01:11:24,985 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-07 01:11:24,986 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-07 01:11:24,987 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-07 01:11:24,988 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-07 01:11:24,989 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-07 01:11:24,990 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-07 01:11:24,991 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-07 01:11:24,992 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-07 01:11:24,993 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-07 01:11:24,994 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-07 01:11:24,995 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-07 01:11:25,012 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-07 01:11:25,014 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-07 01:11:25,015 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-07 01:11:25,016 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-07 01:11:25,017 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-07 01:11:25,018 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-07 01:11:25,021 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-07 01:11:25,021 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-07 01:11:25,022 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-07 01:11:25,023 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-07 01:11:25,023 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-07 01:11:25,024 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-07 01:11:25,024 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-07 01:11:25,025 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-07 01:11:25,026 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-07 01:11:25,026 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-07 01:11:25,027 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-07 01:11:25,028 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-07 01:11:25,028 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-07 01:11:25,029 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-07 01:11:25,029 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-07 01:11:25,030 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-07 01:11:25,030 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-07 01:11:25,031 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-12-07 01:11:25,052 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-07 01:11:25,052 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-07 01:11:25,052 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-07 01:11:25,052 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-07 01:11:25,053 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-07 01:11:25,053 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-07 01:11:25,054 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-07 01:11:25,054 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-07 01:11:25,054 INFO L138 SettingsManager]: * Use SBE=true [2021-12-07 01:11:25,054 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-07 01:11:25,054 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-07 01:11:25,054 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-07 01:11:25,054 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-07 01:11:25,054 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-07 01:11:25,055 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-07 01:11:25,055 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-07 01:11:25,055 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-07 01:11:25,055 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-07 01:11:25,055 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-07 01:11:25,055 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-07 01:11:25,055 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-07 01:11:25,055 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-07 01:11:25,056 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-07 01:11:25,056 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-07 01:11:25,056 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-07 01:11:25,056 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-07 01:11:25,056 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-07 01:11:25,056 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-07 01:11:25,056 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-07 01:11:25,057 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-07 01:11:25,057 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-07 01:11:25,057 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-07 01:11:25,057 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-07 01:11:25,057 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-07 01:11:25,057 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3248e88e6fd49fdcf0a9f78f1aa9e69276951d353f75f39f6bb30d51b2e53989 [2021-12-07 01:11:25,295 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-07 01:11:25,309 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-07 01:11:25,311 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-07 01:11:25,312 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-07 01:11:25,312 INFO L275 PluginConnector]: CDTParser initialized [2021-12-07 01:11:25,313 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/memsafety/test-0234-2.i [2021-12-07 01:11:25,360 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/data/35d6b2018/3a43f80a74874178ad23e0fcc3d1e2b0/FLAG9e07c8596 [2021-12-07 01:11:25,808 INFO L306 CDTParser]: Found 1 translation units. [2021-12-07 01:11:25,808 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/sv-benchmarks/c/memsafety/test-0234-2.i [2021-12-07 01:11:25,822 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/data/35d6b2018/3a43f80a74874178ad23e0fcc3d1e2b0/FLAG9e07c8596 [2021-12-07 01:11:26,356 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/data/35d6b2018/3a43f80a74874178ad23e0fcc3d1e2b0 [2021-12-07 01:11:26,358 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-07 01:11:26,359 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-07 01:11:26,360 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-07 01:11:26,361 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-07 01:11:26,363 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-07 01:11:26,363 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 01:11:26" (1/1) ... [2021-12-07 01:11:26,364 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a9a8794 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:11:26, skipping insertion in model container [2021-12-07 01:11:26,364 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 01:11:26" (1/1) ... [2021-12-07 01:11:26,369 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-07 01:11:26,397 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-07 01:11:26,639 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-07 01:11:26,650 INFO L203 MainTranslator]: Completed pre-run [2021-12-07 01:11:26,699 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-07 01:11:26,737 INFO L208 MainTranslator]: Completed translation [2021-12-07 01:11:26,738 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:11:26 WrapperNode [2021-12-07 01:11:26,738 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-07 01:11:26,739 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-07 01:11:26,739 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-07 01:11:26,739 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-07 01:11:26,744 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:11:26" (1/1) ... [2021-12-07 01:11:26,760 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:11:26" (1/1) ... [2021-12-07 01:11:26,782 INFO L137 Inliner]: procedures = 189, calls = 58, calls flagged for inlining = 14, calls inlined = 14, statements flattened = 193 [2021-12-07 01:11:26,782 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-07 01:11:26,782 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-07 01:11:26,782 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-07 01:11:26,783 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-07 01:11:26,789 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:11:26" (1/1) ... [2021-12-07 01:11:26,789 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:11:26" (1/1) ... [2021-12-07 01:11:26,792 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:11:26" (1/1) ... [2021-12-07 01:11:26,793 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:11:26" (1/1) ... [2021-12-07 01:11:26,802 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:11:26" (1/1) ... [2021-12-07 01:11:26,806 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:11:26" (1/1) ... [2021-12-07 01:11:26,809 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:11:26" (1/1) ... [2021-12-07 01:11:26,812 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-07 01:11:26,813 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-07 01:11:26,813 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-07 01:11:26,813 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-07 01:11:26,814 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:11:26" (1/1) ... [2021-12-07 01:11:26,819 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-07 01:11:26,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:11:26,839 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-07 01:11:26,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-07 01:11:26,884 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-07 01:11:26,884 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-07 01:11:26,884 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-07 01:11:26,884 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-07 01:11:26,884 INFO L130 BoogieDeclarations]: Found specification of procedure zalloc_or_die [2021-12-07 01:11:26,884 INFO L138 BoogieDeclarations]: Found implementation of procedure zalloc_or_die [2021-12-07 01:11:26,885 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-07 01:11:26,885 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-07 01:11:26,885 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-07 01:11:26,885 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-07 01:11:26,885 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-07 01:11:26,974 INFO L236 CfgBuilder]: Building ICFG [2021-12-07 01:11:26,975 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-07 01:11:27,501 INFO L277 CfgBuilder]: Performing block encoding [2021-12-07 01:11:27,507 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-07 01:11:27,507 INFO L301 CfgBuilder]: Removed 10 assume(true) statements. [2021-12-07 01:11:27,508 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 01:11:27 BoogieIcfgContainer [2021-12-07 01:11:27,509 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-07 01:11:27,510 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-07 01:11:27,510 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-07 01:11:27,512 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-07 01:11:27,512 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 01:11:26" (1/3) ... [2021-12-07 01:11:27,513 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c00c473 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 01:11:27, skipping insertion in model container [2021-12-07 01:11:27,513 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:11:26" (2/3) ... [2021-12-07 01:11:27,513 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c00c473 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 01:11:27, skipping insertion in model container [2021-12-07 01:11:27,513 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 01:11:27" (3/3) ... [2021-12-07 01:11:27,514 INFO L111 eAbstractionObserver]: Analyzing ICFG test-0234-2.i [2021-12-07 01:11:27,518 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-07 01:11:27,518 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 70 error locations. [2021-12-07 01:11:27,549 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-07 01:11:27,554 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 01:11:27,554 INFO L340 AbstractCegarLoop]: Starting to check reachability of 70 error locations. [2021-12-07 01:11:27,567 INFO L276 IsEmpty]: Start isEmpty. Operand has 177 states, 99 states have (on average 1.9292929292929293) internal successors, (191), 169 states have internal predecessors, (191), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-07 01:11:27,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-12-07 01:11:27,571 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:11:27,572 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-12-07 01:11:27,572 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr32REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-12-07 01:11:27,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:11:27,576 INFO L85 PathProgramCache]: Analyzing trace with hash 929958, now seen corresponding path program 1 times [2021-12-07 01:11:27,583 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:11:27,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1539519321] [2021-12-07 01:11:27,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:11:27,588 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:11:27,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:11:27,589 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:11:27,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-07 01:11:27,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:11:27,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 22 conjuncts, 1 conjunts are in the unsatisfiable core [2021-12-07 01:11:27,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:11:27,672 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 01:11:27,672 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:11:27,672 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:11:27,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1539519321] [2021-12-07 01:11:27,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1539519321] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:11:27,673 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:11:27,673 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-07 01:11:27,674 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030828744] [2021-12-07 01:11:27,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:11:27,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-07 01:11:27,678 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:11:27,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-07 01:11:27,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-07 01:11:27,701 INFO L87 Difference]: Start difference. First operand has 177 states, 99 states have (on average 1.9292929292929293) internal successors, (191), 169 states have internal predecessors, (191), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:11:27,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:11:27,720 INFO L93 Difference]: Finished difference Result 177 states and 192 transitions. [2021-12-07 01:11:27,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-07 01:11:27,721 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 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 4 [2021-12-07 01:11:27,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:11:27,728 INFO L225 Difference]: With dead ends: 177 [2021-12-07 01:11:27,728 INFO L226 Difference]: Without dead ends: 175 [2021-12-07 01:11:27,729 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-07 01:11:27,733 INFO L933 BasicCegarLoop]: 192 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:11:27,734 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 01:11:27,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-12-07 01:11:27,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2021-12-07 01:11:27,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 98 states have (on average 1.816326530612245) internal successors, (178), 167 states have internal predecessors, (178), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-07 01:11:27,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 190 transitions. [2021-12-07 01:11:27,778 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 190 transitions. Word has length 4 [2021-12-07 01:11:27,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:11:27,778 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 190 transitions. [2021-12-07 01:11:27,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:11:27,778 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 190 transitions. [2021-12-07 01:11:27,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-07 01:11:27,779 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:11:27,779 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-07 01:11:27,788 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-12-07 01:11:27,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:11:27,981 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting zalloc_or_dieErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-12-07 01:11:27,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:11:27,984 INFO L85 PathProgramCache]: Analyzing trace with hash 889828716, now seen corresponding path program 1 times [2021-12-07 01:11:27,986 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:11:27,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1769943341] [2021-12-07 01:11:27,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:11:27,989 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:11:27,989 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:11:27,992 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:11:27,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-07 01:11:28,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:11:28,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-07 01:11:28,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:11:28,146 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-07 01:11:28,153 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 01:11:28,153 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:11:28,154 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:11:28,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1769943341] [2021-12-07 01:11:28,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1769943341] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:11:28,154 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:11:28,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-07 01:11:28,154 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354842444] [2021-12-07 01:11:28,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:11:28,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 01:11:28,155 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:11:28,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 01:11:28,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:11:28,156 INFO L87 Difference]: Start difference. First operand 175 states and 190 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:11:28,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:11:28,359 INFO L93 Difference]: Finished difference Result 174 states and 189 transitions. [2021-12-07 01:11:28,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 01:11:28,360 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 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 01:11:28,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:11:28,362 INFO L225 Difference]: With dead ends: 174 [2021-12-07 01:11:28,362 INFO L226 Difference]: Without dead ends: 174 [2021-12-07 01:11:28,363 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 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 01:11:28,364 INFO L933 BasicCegarLoop]: 184 mSDtfsCounter, 9 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-07 01:11:28,365 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 292 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-07 01:11:28,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-12-07 01:11:28,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 174. [2021-12-07 01:11:28,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 98 states have (on average 1.8061224489795917) internal successors, (177), 166 states have internal predecessors, (177), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-07 01:11:28,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 189 transitions. [2021-12-07 01:11:28,379 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 189 transitions. Word has length 6 [2021-12-07 01:11:28,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:11:28,380 INFO L470 AbstractCegarLoop]: Abstraction has 174 states and 189 transitions. [2021-12-07 01:11:28,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:11:28,380 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 189 transitions. [2021-12-07 01:11:28,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-07 01:11:28,380 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:11:28,381 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:11:28,388 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-12-07 01:11:28,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:11:28,582 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-12-07 01:11:28,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:11:28,585 INFO L85 PathProgramCache]: Analyzing trace with hash 1814886736, now seen corresponding path program 1 times [2021-12-07 01:11:28,587 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:11:28,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1626888644] [2021-12-07 01:11:28,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:11:28,590 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:11:28,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:11:28,593 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:11:28,596 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-12-07 01:11:28,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:11:28,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-07 01:11:28,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:11:28,820 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-07 01:11:28,845 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 01:11:28,845 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:11:28,845 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:11:28,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1626888644] [2021-12-07 01:11:28,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1626888644] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:11:28,845 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:11:28,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 01:11:28,846 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175584009] [2021-12-07 01:11:28,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:11:28,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-07 01:11:28,846 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:11:28,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-07 01:11:28,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-07 01:11:28,847 INFO L87 Difference]: Start difference. First operand 174 states and 189 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:11:29,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:11:29,128 INFO L93 Difference]: Finished difference Result 183 states and 198 transitions. [2021-12-07 01:11:29,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-07 01:11:29,129 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 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 01:11:29,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:11:29,131 INFO L225 Difference]: With dead ends: 183 [2021-12-07 01:11:29,131 INFO L226 Difference]: Without dead ends: 183 [2021-12-07 01:11:29,131 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 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 01:11:29,132 INFO L933 BasicCegarLoop]: 178 mSDtfsCounter, 16 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 479 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-07 01:11:29,132 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 479 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-07 01:11:29,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-12-07 01:11:29,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 183. [2021-12-07 01:11:29,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 106 states have (on average 1.7547169811320755) internal successors, (186), 174 states have internal predecessors, (186), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-07 01:11:29,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 198 transitions. [2021-12-07 01:11:29,142 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 198 transitions. Word has length 7 [2021-12-07 01:11:29,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:11:29,143 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 198 transitions. [2021-12-07 01:11:29,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:11:29,143 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 198 transitions. [2021-12-07 01:11:29,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-07 01:11:29,144 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:11:29,145 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:11:29,151 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-12-07 01:11:29,345 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:11:29,346 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-12-07 01:11:29,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:11:29,348 INFO L85 PathProgramCache]: Analyzing trace with hash 1349329703, now seen corresponding path program 1 times [2021-12-07 01:11:29,351 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:11:29,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1685800102] [2021-12-07 01:11:29,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:11:29,352 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:11:29,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:11:29,355 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:11:29,357 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-12-07 01:11:29,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:11:29,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-07 01:11:29,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:11:29,711 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-07 01:11:29,711 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:11:29,711 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:11:29,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1685800102] [2021-12-07 01:11:29,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1685800102] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:11:29,711 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:11:29,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-07 01:11:29,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058077074] [2021-12-07 01:11:29,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:11:29,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-07 01:11:29,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:11:29,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-07 01:11:29,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-07 01:11:29,713 INFO L87 Difference]: Start difference. First operand 183 states and 198 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-07 01:11:29,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:11:29,768 INFO L93 Difference]: Finished difference Result 195 states and 210 transitions. [2021-12-07 01:11:29,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-07 01:11:29,769 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 66 [2021-12-07 01:11:29,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:11:29,770 INFO L225 Difference]: With dead ends: 195 [2021-12-07 01:11:29,770 INFO L226 Difference]: Without dead ends: 185 [2021-12-07 01:11:29,770 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-07 01:11:29,771 INFO L933 BasicCegarLoop]: 179 mSDtfsCounter, 18 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 523 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:11:29,771 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 523 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 01:11:29,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-12-07 01:11:29,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2021-12-07 01:11:29,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 108 states have (on average 1.7407407407407407) internal successors, (188), 176 states have internal predecessors, (188), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-07 01:11:29,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 200 transitions. [2021-12-07 01:11:29,780 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 200 transitions. Word has length 66 [2021-12-07 01:11:29,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:11:29,780 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 200 transitions. [2021-12-07 01:11:29,780 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-07 01:11:29,780 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 200 transitions. [2021-12-07 01:11:29,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-12-07 01:11:29,782 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:11:29,782 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:11:29,792 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-12-07 01:11:29,982 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:11:29,984 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-12-07 01:11:29,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:11:29,985 INFO L85 PathProgramCache]: Analyzing trace with hash -545319389, now seen corresponding path program 1 times [2021-12-07 01:11:29,987 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:11:29,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [58005562] [2021-12-07 01:11:29,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:11:29,988 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:11:29,988 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:11:29,990 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:11:29,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-12-07 01:11:30,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:11:30,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-07 01:11:30,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:11:30,338 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 51 proven. 1 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-12-07 01:11:30,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:11:30,533 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 15 proven. 45 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-12-07 01:11:30,533 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:11:30,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [58005562] [2021-12-07 01:11:30,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [58005562] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:11:30,533 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:11:30,533 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-12-07 01:11:30,533 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467267838] [2021-12-07 01:11:30,534 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:11:30,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-07 01:11:30,534 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:11:30,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-07 01:11:30,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-12-07 01:11:30,535 INFO L87 Difference]: Start difference. First operand 185 states and 200 transitions. Second operand has 10 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 2 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-07 01:11:30,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:11:30,744 INFO L93 Difference]: Finished difference Result 204 states and 220 transitions. [2021-12-07 01:11:30,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-07 01:11:30,745 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 2 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) Word has length 71 [2021-12-07 01:11:30,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:11:30,746 INFO L225 Difference]: With dead ends: 204 [2021-12-07 01:11:30,746 INFO L226 Difference]: Without dead ends: 189 [2021-12-07 01:11:30,746 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2021-12-07 01:11:30,747 INFO L933 BasicCegarLoop]: 180 mSDtfsCounter, 40 mSDsluCounter, 867 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 1047 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 01:11:30,747 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 1047 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 01:11:30,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-12-07 01:11:30,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2021-12-07 01:11:30,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 112 states have (on average 1.7142857142857142) internal successors, (192), 180 states have internal predecessors, (192), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-07 01:11:30,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 204 transitions. [2021-12-07 01:11:30,755 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 204 transitions. Word has length 71 [2021-12-07 01:11:30,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:11:30,755 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 204 transitions. [2021-12-07 01:11:30,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 2 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-07 01:11:30,756 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 204 transitions. [2021-12-07 01:11:30,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-12-07 01:11:30,758 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:11:30,758 INFO L514 BasicCegarLoop]: trace histogram [20, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:11:30,773 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-12-07 01:11:30,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:11:30,959 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-12-07 01:11:30,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:11:30,961 INFO L85 PathProgramCache]: Analyzing trace with hash -91152857, now seen corresponding path program 2 times [2021-12-07 01:11:30,963 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:11:30,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [957649285] [2021-12-07 01:11:30,964 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 01:11:30,965 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:11:30,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:11:30,967 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:11:30,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-12-07 01:11:31,090 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-07 01:11:31,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:11:31,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-07 01:11:31,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:11:31,191 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 0 case distinctions, treesize of input 8 treesize of output 7 [2021-12-07 01:11:31,310 INFO L134 CoverageAnalysis]: Checked inductivity of 395 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2021-12-07 01:11:31,310 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:11:31,310 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:11:31,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [957649285] [2021-12-07 01:11:31,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [957649285] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:11:31,310 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:11:31,310 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-07 01:11:31,311 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766424073] [2021-12-07 01:11:31,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:11:31,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 01:11:31,311 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:11:31,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 01:11:31,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:11:31,311 INFO L87 Difference]: Start difference. First operand 189 states and 204 transitions. Second operand has 3 states, 2 states have (on average 12.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-07 01:11:31,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:11:31,316 INFO L93 Difference]: Finished difference Result 188 states and 203 transitions. [2021-12-07 01:11:31,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 01:11:31,316 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 12.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 86 [2021-12-07 01:11:31,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:11:31,318 INFO L225 Difference]: With dead ends: 188 [2021-12-07 01:11:31,318 INFO L226 Difference]: Without dead ends: 188 [2021-12-07 01:11:31,318 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 84 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 01:11:31,319 INFO L933 BasicCegarLoop]: 186 mSDtfsCounter, 0 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:11:31,320 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 315 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 58 Unchecked, 0.0s Time] [2021-12-07 01:11:31,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-12-07 01:11:31,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 188. [2021-12-07 01:11:31,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 112 states have (on average 1.7053571428571428) internal successors, (191), 179 states have internal predecessors, (191), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-07 01:11:31,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 203 transitions. [2021-12-07 01:11:31,329 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 203 transitions. Word has length 86 [2021-12-07 01:11:31,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:11:31,329 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 203 transitions. [2021-12-07 01:11:31,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 12.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-07 01:11:31,330 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 203 transitions. [2021-12-07 01:11:31,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-12-07 01:11:31,331 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:11:31,332 INFO L514 BasicCegarLoop]: trace histogram [22, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:11:31,339 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-12-07 01:11:31,532 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:11:31,533 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-12-07 01:11:31,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:11:31,534 INFO L85 PathProgramCache]: Analyzing trace with hash 520677226, now seen corresponding path program 1 times [2021-12-07 01:11:31,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:11:31,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1524541525] [2021-12-07 01:11:31,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:11:31,544 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:11:31,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:11:31,546 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:11:31,549 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-12-07 01:11:31,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:11:31,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 575 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-07 01:11:31,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:11:31,963 INFO L134 CoverageAnalysis]: Checked inductivity of 498 backedges. 155 proven. 10 refuted. 0 times theorem prover too weak. 333 trivial. 0 not checked. [2021-12-07 01:11:31,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:11:32,340 INFO L134 CoverageAnalysis]: Checked inductivity of 498 backedges. 0 proven. 160 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2021-12-07 01:11:32,340 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:11:32,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1524541525] [2021-12-07 01:11:32,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1524541525] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:11:32,340 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:11:32,340 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-12-07 01:11:32,340 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133938713] [2021-12-07 01:11:32,340 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:11:32,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-07 01:11:32,341 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:11:32,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-07 01:11:32,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2021-12-07 01:11:32,342 INFO L87 Difference]: Start difference. First operand 188 states and 203 transitions. Second operand has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 2 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (12), 1 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-07 01:11:32,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:11:32,963 INFO L93 Difference]: Finished difference Result 220 states and 237 transitions. [2021-12-07 01:11:32,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-07 01:11:32,964 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 2 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (12), 1 states have call predecessors, (12), 2 states have call successors, (12) Word has length 95 [2021-12-07 01:11:32,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:11:32,966 INFO L225 Difference]: With dead ends: 220 [2021-12-07 01:11:32,966 INFO L226 Difference]: Without dead ends: 195 [2021-12-07 01:11:32,966 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=252, Invalid=504, Unknown=0, NotChecked=0, Total=756 [2021-12-07 01:11:32,967 INFO L933 BasicCegarLoop]: 188 mSDtfsCounter, 65 mSDsluCounter, 1592 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 1780 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-07 01:11:32,968 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 1780 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-07 01:11:32,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-12-07 01:11:32,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2021-12-07 01:11:32,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 119 states have (on average 1.6638655462184875) internal successors, (198), 186 states have internal predecessors, (198), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-07 01:11:32,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 210 transitions. [2021-12-07 01:11:32,974 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 210 transitions. Word has length 95 [2021-12-07 01:11:32,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:11:32,975 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 210 transitions. [2021-12-07 01:11:32,975 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 2 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (12), 1 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-07 01:11:32,975 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 210 transitions. [2021-12-07 01:11:32,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-12-07 01:11:32,977 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:11:32,977 INFO L514 BasicCegarLoop]: trace histogram [45, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:11:32,989 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-12-07 01:11:33,178 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:11:33,179 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-12-07 01:11:33,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:11:33,180 INFO L85 PathProgramCache]: Analyzing trace with hash 947433240, now seen corresponding path program 2 times [2021-12-07 01:11:33,182 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:11:33,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [475563918] [2021-12-07 01:11:33,183 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 01:11:33,183 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:11:33,184 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:11:33,184 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:11:33,185 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-12-07 01:11:34,078 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-07 01:11:34,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:11:34,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 828 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-07 01:11:34,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:11:34,277 INFO L134 CoverageAnalysis]: Checked inductivity of 1395 backedges. 305 proven. 15 refuted. 0 times theorem prover too weak. 1075 trivial. 0 not checked. [2021-12-07 01:11:34,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:11:34,722 INFO L134 CoverageAnalysis]: Checked inductivity of 1395 backedges. 305 proven. 15 refuted. 0 times theorem prover too weak. 1075 trivial. 0 not checked. [2021-12-07 01:11:34,722 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:11:34,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [475563918] [2021-12-07 01:11:34,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [475563918] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:11:34,722 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:11:34,722 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-12-07 01:11:34,723 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162311059] [2021-12-07 01:11:34,723 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:11:34,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-07 01:11:34,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:11:34,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-07 01:11:34,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2021-12-07 01:11:34,724 INFO L87 Difference]: Start difference. First operand 195 states and 210 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 1 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-07 01:11:35,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:11:35,464 INFO L93 Difference]: Finished difference Result 212 states and 232 transitions. [2021-12-07 01:11:35,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-07 01:11:35,465 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 1 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 118 [2021-12-07 01:11:35,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:11:35,467 INFO L225 Difference]: With dead ends: 212 [2021-12-07 01:11:35,467 INFO L226 Difference]: Without dead ends: 202 [2021-12-07 01:11:35,468 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=345, Invalid=647, Unknown=0, NotChecked=0, Total=992 [2021-12-07 01:11:35,468 INFO L933 BasicCegarLoop]: 182 mSDtfsCounter, 100 mSDsluCounter, 1421 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 1603 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-07 01:11:35,468 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 1603 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-07 01:11:35,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-12-07 01:11:35,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 202. [2021-12-07 01:11:35,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 126 states have (on average 1.626984126984127) internal successors, (205), 193 states have internal predecessors, (205), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-07 01:11:35,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 217 transitions. [2021-12-07 01:11:35,473 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 217 transitions. Word has length 118 [2021-12-07 01:11:35,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:11:35,474 INFO L470 AbstractCegarLoop]: Abstraction has 202 states and 217 transitions. [2021-12-07 01:11:35,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 1 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-07 01:11:35,474 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 217 transitions. [2021-12-07 01:11:35,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-12-07 01:11:35,477 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:11:35,477 INFO L514 BasicCegarLoop]: trace histogram [52, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:11:35,492 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-12-07 01:11:35,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:11:35,678 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-12-07 01:11:35,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:11:35,680 INFO L85 PathProgramCache]: Analyzing trace with hash -1737051862, now seen corresponding path program 3 times [2021-12-07 01:11:35,682 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:11:35,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1226981179] [2021-12-07 01:11:35,683 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-07 01:11:35,683 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:11:35,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:11:35,685 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:11:35,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-12-07 01:11:35,913 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-07 01:11:35,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:11:35,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-07 01:11:35,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:11:35,979 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-07 01:11:36,216 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-07 01:11:36,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 34 [2021-12-07 01:11:36,237 INFO L134 CoverageAnalysis]: Checked inductivity of 1773 backedges. 853 proven. 124 refuted. 0 times theorem prover too weak. 796 trivial. 0 not checked. [2021-12-07 01:11:36,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:11:36,577 INFO L134 CoverageAnalysis]: Checked inductivity of 1773 backedges. 853 proven. 124 refuted. 0 times theorem prover too weak. 796 trivial. 0 not checked. [2021-12-07 01:11:36,577 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:11:36,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1226981179] [2021-12-07 01:11:36,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1226981179] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:11:36,577 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:11:36,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2021-12-07 01:11:36,578 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797607892] [2021-12-07 01:11:36,578 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:11:36,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-07 01:11:36,578 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:11:36,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-07 01:11:36,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-12-07 01:11:36,579 INFO L87 Difference]: Start difference. First operand 202 states and 217 transitions. Second operand has 11 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 2 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-07 01:11:37,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:11:37,318 INFO L93 Difference]: Finished difference Result 235 states and 254 transitions. [2021-12-07 01:11:37,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-07 01:11:37,319 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 2 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 125 [2021-12-07 01:11:37,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:11:37,321 INFO L225 Difference]: With dead ends: 235 [2021-12-07 01:11:37,321 INFO L226 Difference]: Without dead ends: 235 [2021-12-07 01:11:37,322 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 230 SyntacticMatches, 9 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2021-12-07 01:11:37,322 INFO L933 BasicCegarLoop]: 149 mSDtfsCounter, 109 mSDsluCounter, 850 mSDsCounter, 0 mSdLazyCounter, 531 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 999 SdHoareTripleChecker+Invalid, 764 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 232 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-07 01:11:37,322 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 999 Invalid, 764 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 531 Invalid, 0 Unknown, 232 Unchecked, 0.6s Time] [2021-12-07 01:11:37,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-12-07 01:11:37,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 200. [2021-12-07 01:11:37,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 126 states have (on average 1.6111111111111112) internal successors, (203), 191 states have internal predecessors, (203), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-07 01:11:37,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 215 transitions. [2021-12-07 01:11:37,328 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 215 transitions. Word has length 125 [2021-12-07 01:11:37,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:11:37,329 INFO L470 AbstractCegarLoop]: Abstraction has 200 states and 215 transitions. [2021-12-07 01:11:37,329 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 2 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-07 01:11:37,329 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 215 transitions. [2021-12-07 01:11:37,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-12-07 01:11:37,330 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:11:37,330 INFO L514 BasicCegarLoop]: trace histogram [52, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:11:37,339 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (10)] Ended with exit code 0 [2021-12-07 01:11:37,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:11:37,531 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-12-07 01:11:37,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:11:37,531 INFO L85 PathProgramCache]: Analyzing trace with hash -1737051861, now seen corresponding path program 1 times [2021-12-07 01:11:37,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:11:37,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [515088861] [2021-12-07 01:11:37,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:11:37,532 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:11:37,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:11:37,533 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:11:37,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-12-07 01:11:38,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:11:38,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 905 conjuncts, 21 conjunts are in the unsatisfiable core [2021-12-07 01:11:38,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:11:38,875 INFO L134 CoverageAnalysis]: Checked inductivity of 1773 backedges. 620 proven. 78 refuted. 0 times theorem prover too weak. 1075 trivial. 0 not checked. [2021-12-07 01:11:38,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:11:39,890 INFO L134 CoverageAnalysis]: Checked inductivity of 1773 backedges. 620 proven. 78 refuted. 0 times theorem prover too weak. 1075 trivial. 0 not checked. [2021-12-07 01:11:39,891 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:11:39,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [515088861] [2021-12-07 01:11:39,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [515088861] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:11:39,891 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:11:39,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-12-07 01:11:39,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961203005] [2021-12-07 01:11:39,891 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:11:39,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-07 01:11:39,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:11:39,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-07 01:11:39,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=706, Unknown=0, NotChecked=0, Total=992 [2021-12-07 01:11:39,892 INFO L87 Difference]: Start difference. First operand 200 states and 215 transitions. Second operand has 32 states, 32 states have (on average 1.9375) internal successors, (62), 32 states have internal predecessors, (62), 1 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-07 01:11:43,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:11:43,209 INFO L93 Difference]: Finished difference Result 248 states and 294 transitions. [2021-12-07 01:11:43,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-12-07 01:11:43,210 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.9375) internal successors, (62), 32 states have internal predecessors, (62), 1 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 125 [2021-12-07 01:11:43,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:11:43,212 INFO L225 Difference]: With dead ends: 248 [2021-12-07 01:11:43,212 INFO L226 Difference]: Without dead ends: 238 [2021-12-07 01:11:43,214 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1195, Invalid=2345, Unknown=0, NotChecked=0, Total=3540 [2021-12-07 01:11:43,215 INFO L933 BasicCegarLoop]: 192 mSDtfsCounter, 383 mSDsluCounter, 2962 mSDsCounter, 0 mSdLazyCounter, 829 mSolverCounterSat, 226 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 383 SdHoareTripleChecker+Valid, 3154 SdHoareTripleChecker+Invalid, 1055 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 226 IncrementalHoareTripleChecker+Valid, 829 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-07 01:11:43,215 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [383 Valid, 3154 Invalid, 1055 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [226 Valid, 829 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-07 01:11:43,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-12-07 01:11:43,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 218. [2021-12-07 01:11:43,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 144 states have (on average 1.5555555555555556) internal successors, (224), 209 states have internal predecessors, (224), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-07 01:11:43,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 236 transitions. [2021-12-07 01:11:43,224 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 236 transitions. Word has length 125 [2021-12-07 01:11:43,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:11:43,224 INFO L470 AbstractCegarLoop]: Abstraction has 218 states and 236 transitions. [2021-12-07 01:11:43,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.9375) internal successors, (62), 32 states have internal predecessors, (62), 1 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-07 01:11:43,224 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 236 transitions. [2021-12-07 01:11:43,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-12-07 01:11:43,225 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:11:43,225 INFO L514 BasicCegarLoop]: trace histogram [66, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:11:43,241 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (11)] Ended with exit code 0 [2021-12-07 01:11:43,426 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:11:43,427 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-12-07 01:11:43,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:11:43,428 INFO L85 PathProgramCache]: Analyzing trace with hash -2102947477, now seen corresponding path program 2 times [2021-12-07 01:11:43,431 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:11:43,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1058367138] [2021-12-07 01:11:43,431 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 01:11:43,432 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:11:43,432 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:11:43,434 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:11:43,436 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-12-07 01:11:44,562 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-07 01:11:44,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:11:44,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 1059 conjuncts, 35 conjunts are in the unsatisfiable core [2021-12-07 01:11:44,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:11:45,165 INFO L134 CoverageAnalysis]: Checked inductivity of 2676 backedges. 1250 proven. 351 refuted. 0 times theorem prover too weak. 1075 trivial. 0 not checked. [2021-12-07 01:11:45,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:11:47,961 INFO L134 CoverageAnalysis]: Checked inductivity of 2676 backedges. 1250 proven. 351 refuted. 0 times theorem prover too weak. 1075 trivial. 0 not checked. [2021-12-07 01:11:47,961 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:11:47,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1058367138] [2021-12-07 01:11:47,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1058367138] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:11:47,961 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:11:47,961 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 60 [2021-12-07 01:11:47,961 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485459625] [2021-12-07 01:11:47,961 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:11:47,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2021-12-07 01:11:47,962 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:11:47,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-12-07 01:11:47,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=958, Invalid=2582, Unknown=0, NotChecked=0, Total=3540 [2021-12-07 01:11:47,964 INFO L87 Difference]: Start difference. First operand 218 states and 236 transitions. Second operand has 60 states, 60 states have (on average 1.5) internal successors, (90), 60 states have internal predecessors, (90), 1 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-07 01:12:03,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:12:03,089 INFO L93 Difference]: Finished difference Result 276 states and 336 transitions. [2021-12-07 01:12:03,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-12-07 01:12:03,090 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 1.5) internal successors, (90), 60 states have internal predecessors, (90), 1 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 139 [2021-12-07 01:12:03,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:12:03,092 INFO L225 Difference]: With dead ends: 276 [2021-12-07 01:12:03,092 INFO L226 Difference]: Without dead ends: 266 [2021-12-07 01:12:03,094 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2140 ImplicationChecksByTransitivity, 13.3s TimeCoverageRelationStatistics Valid=3526, Invalid=6980, Unknown=0, NotChecked=0, Total=10506 [2021-12-07 01:12:03,095 INFO L933 BasicCegarLoop]: 196 mSDtfsCounter, 868 mSDsluCounter, 5905 mSDsCounter, 0 mSdLazyCounter, 1963 mSolverCounterSat, 569 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 868 SdHoareTripleChecker+Valid, 6101 SdHoareTripleChecker+Invalid, 2532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 569 IncrementalHoareTripleChecker+Valid, 1963 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2021-12-07 01:12:03,095 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [868 Valid, 6101 Invalid, 2532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [569 Valid, 1963 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2021-12-07 01:12:03,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-12-07 01:12:03,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 246. [2021-12-07 01:12:03,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 172 states have (on average 1.4651162790697674) internal successors, (252), 237 states have internal predecessors, (252), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-07 01:12:03,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 264 transitions. [2021-12-07 01:12:03,102 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 264 transitions. Word has length 139 [2021-12-07 01:12:03,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:12:03,102 INFO L470 AbstractCegarLoop]: Abstraction has 246 states and 264 transitions. [2021-12-07 01:12:03,102 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 1.5) internal successors, (90), 60 states have internal predecessors, (90), 1 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-07 01:12:03,103 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 264 transitions. [2021-12-07 01:12:03,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-12-07 01:12:03,104 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:12:03,104 INFO L514 BasicCegarLoop]: trace histogram [94, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:12:03,126 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2021-12-07 01:12:03,304 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:12:03,305 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-12-07 01:12:03,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:12:03,306 INFO L85 PathProgramCache]: Analyzing trace with hash 1254425067, now seen corresponding path program 3 times [2021-12-07 01:12:03,309 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:12:03,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [274176166] [2021-12-07 01:12:03,309 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-07 01:12:03,310 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:12:03,310 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:12:03,311 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:12:03,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-12-07 01:12:03,573 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-07 01:12:03,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:12:03,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 29 conjunts are in the unsatisfiable core [2021-12-07 01:12:03,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:12:04,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:12:04,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 14 [2021-12-07 01:12:04,437 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-07 01:12:04,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2021-12-07 01:12:04,473 INFO L134 CoverageAnalysis]: Checked inductivity of 5070 backedges. 2365 proven. 502 refuted. 0 times theorem prover too weak. 2203 trivial. 0 not checked. [2021-12-07 01:12:04,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:12:04,809 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:12:04,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [274176166] [2021-12-07 01:12:04,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [274176166] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:12:04,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [526677315] [2021-12-07 01:12:04,810 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-07 01:12:04,810 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-07 01:12:04,810 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-07 01:12:04,810 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-07 01:12:04,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-12-07 01:12:05,244 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-07 01:12:05,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:12:05,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 34 conjunts are in the unsatisfiable core [2021-12-07 01:12:05,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:12:05,329 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-07 01:12:06,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:12:06,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 14 [2021-12-07 01:12:06,249 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-07 01:12:06,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2021-12-07 01:12:06,292 INFO L134 CoverageAnalysis]: Checked inductivity of 5070 backedges. 2365 proven. 502 refuted. 0 times theorem prover too weak. 2203 trivial. 0 not checked. [2021-12-07 01:12:06,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:12:06,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [526677315] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:12:06,455 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:12:06,456 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-12-07 01:12:06,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274897091] [2021-12-07 01:12:06,456 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:12:06,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-07 01:12:06,456 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:12:06,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-07 01:12:06,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2021-12-07 01:12:06,457 INFO L87 Difference]: Start difference. First operand 246 states and 264 transitions. Second operand has 20 states, 17 states have (on average 3.0) internal successors, (51), 15 states have internal predecessors, (51), 3 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (8), 5 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-07 01:12:08,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:12:08,866 INFO L93 Difference]: Finished difference Result 279 states and 301 transitions. [2021-12-07 01:12:08,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-07 01:12:08,866 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 3.0) internal successors, (51), 15 states have internal predecessors, (51), 3 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (8), 5 states have call predecessors, (8), 3 states have call successors, (8) Word has length 167 [2021-12-07 01:12:08,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:12:08,870 INFO L225 Difference]: With dead ends: 279 [2021-12-07 01:12:08,870 INFO L226 Difference]: Without dead ends: 279 [2021-12-07 01:12:08,871 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 314 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=91, Invalid=665, Unknown=0, NotChecked=0, Total=756 [2021-12-07 01:12:08,871 INFO L933 BasicCegarLoop]: 108 mSDtfsCounter, 358 mSDsluCounter, 1118 mSDsCounter, 0 mSdLazyCounter, 1171 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 358 SdHoareTripleChecker+Valid, 1226 SdHoareTripleChecker+Invalid, 1296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 112 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-07 01:12:08,871 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [358 Valid, 1226 Invalid, 1296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1171 Invalid, 0 Unknown, 112 Unchecked, 2.1s Time] [2021-12-07 01:12:08,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2021-12-07 01:12:08,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 244. [2021-12-07 01:12:08,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 172 states have (on average 1.4534883720930232) internal successors, (250), 235 states have internal predecessors, (250), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-07 01:12:08,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 262 transitions. [2021-12-07 01:12:08,877 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 262 transitions. Word has length 167 [2021-12-07 01:12:08,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:12:08,878 INFO L470 AbstractCegarLoop]: Abstraction has 244 states and 262 transitions. [2021-12-07 01:12:08,878 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 3.0) internal successors, (51), 15 states have internal predecessors, (51), 3 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (8), 5 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-07 01:12:08,878 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 262 transitions. [2021-12-07 01:12:08,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2021-12-07 01:12:08,879 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:12:08,879 INFO L514 BasicCegarLoop]: trace histogram [94, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:12:08,892 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2021-12-07 01:12:09,093 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2021-12-07 01:12:09,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt [2021-12-07 01:12:09,280 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-12-07 01:12:09,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:12:09,281 INFO L85 PathProgramCache]: Analyzing trace with hash -1383321525, now seen corresponding path program 1 times [2021-12-07 01:12:09,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:12:09,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1853441208] [2021-12-07 01:12:09,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:12:09,285 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:12:09,285 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:12:09,286 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:12:09,286 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-12-07 01:12:10,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:12:10,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 1381 conjuncts, 63 conjunts are in the unsatisfiable core [2021-12-07 01:12:10,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:12:12,425 INFO L134 CoverageAnalysis]: Checked inductivity of 5070 backedges. 2510 proven. 1485 refuted. 0 times theorem prover too weak. 1075 trivial. 0 not checked. [2021-12-07 01:12:12,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:12:20,869 INFO L134 CoverageAnalysis]: Checked inductivity of 5070 backedges. 2510 proven. 1485 refuted. 0 times theorem prover too weak. 1075 trivial. 0 not checked. [2021-12-07 01:12:20,870 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:12:20,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1853441208] [2021-12-07 01:12:20,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1853441208] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:12:20,870 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:12:20,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 116 [2021-12-07 01:12:20,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145994676] [2021-12-07 01:12:20,870 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:12:20,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2021-12-07 01:12:20,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:12:20,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2021-12-07 01:12:20,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3478, Invalid=9862, Unknown=0, NotChecked=0, Total=13340 [2021-12-07 01:12:20,875 INFO L87 Difference]: Start difference. First operand 244 states and 262 transitions. Second operand has 116 states, 116 states have (on average 1.2758620689655173) internal successors, (148), 116 states have internal predecessors, (148), 1 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-07 01:13:48,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:13:48,885 INFO L93 Difference]: Finished difference Result 330 states and 418 transitions. [2021-12-07 01:13:48,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2021-12-07 01:13:48,886 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 116 states have (on average 1.2758620689655173) internal successors, (148), 116 states have internal predecessors, (148), 1 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 169 [2021-12-07 01:13:48,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:13:48,887 INFO L225 Difference]: With dead ends: 330 [2021-12-07 01:13:48,887 INFO L226 Difference]: Without dead ends: 320 [2021-12-07 01:13:48,895 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6550 ImplicationChecksByTransitivity, 81.6s TimeCoverageRelationStatistics Valid=11646, Invalid=23136, Unknown=0, NotChecked=0, Total=34782 [2021-12-07 01:13:48,896 INFO L933 BasicCegarLoop]: 194 mSDtfsCounter, 2855 mSDsluCounter, 11084 mSDsCounter, 0 mSdLazyCounter, 5377 mSolverCounterSat, 1768 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2855 SdHoareTripleChecker+Valid, 11278 SdHoareTripleChecker+Invalid, 7145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1768 IncrementalHoareTripleChecker+Valid, 5377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.4s IncrementalHoareTripleChecker+Time [2021-12-07 01:13:48,896 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2855 Valid, 11278 Invalid, 7145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1768 Valid, 5377 Invalid, 0 Unknown, 0 Unchecked, 14.4s Time] [2021-12-07 01:13:48,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2021-12-07 01:13:48,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 300. [2021-12-07 01:13:48,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 228 states have (on average 1.3421052631578947) internal successors, (306), 291 states have internal predecessors, (306), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-07 01:13:48,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 318 transitions. [2021-12-07 01:13:48,905 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 318 transitions. Word has length 169 [2021-12-07 01:13:48,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:13:48,906 INFO L470 AbstractCegarLoop]: Abstraction has 300 states and 318 transitions. [2021-12-07 01:13:48,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 116 states have (on average 1.2758620689655173) internal successors, (148), 116 states have internal predecessors, (148), 1 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-07 01:13:48,906 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 318 transitions. [2021-12-07 01:13:48,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2021-12-07 01:13:48,907 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:13:48,908 INFO L514 BasicCegarLoop]: trace histogram [150, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:13:48,927 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-12-07 01:13:49,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:13:49,109 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-12-07 01:13:49,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:13:49,111 INFO L85 PathProgramCache]: Analyzing trace with hash 1329697099, now seen corresponding path program 2 times [2021-12-07 01:13:49,114 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:13:49,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [422687264] [2021-12-07 01:13:49,115 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 01:13:49,115 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:13:49,115 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:13:49,117 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:13:49,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-12-07 01:13:50,950 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-07 01:13:50,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:13:51,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 1997 conjuncts, 119 conjunts are in the unsatisfiable core [2021-12-07 01:13:51,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:13:57,225 INFO L134 CoverageAnalysis]: Checked inductivity of 12210 backedges. 5030 proven. 6105 refuted. 0 times theorem prover too weak. 1075 trivial. 0 not checked. [2021-12-07 01:13:57,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:14:21,057 INFO L134 CoverageAnalysis]: Checked inductivity of 12210 backedges. 5030 proven. 6105 refuted. 0 times theorem prover too weak. 1075 trivial. 0 not checked. [2021-12-07 01:14:21,058 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:14:21,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [422687264] [2021-12-07 01:14:21,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [422687264] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:14:21,058 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:14:21,058 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [115, 115] total 228 [2021-12-07 01:14:21,058 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583566433] [2021-12-07 01:14:21,058 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:14:21,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 228 states [2021-12-07 01:14:21,059 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:14:21,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 228 interpolants. [2021-12-07 01:14:21,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7969, Invalid=43787, Unknown=0, NotChecked=0, Total=51756 [2021-12-07 01:14:21,067 INFO L87 Difference]: Start difference. First operand 300 states and 318 transitions. Second operand has 228 states, 228 states have (on average 1.1403508771929824) internal successors, (260), 228 states have internal predecessors, (260), 1 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-07 01:15:19,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:15:19,930 INFO L93 Difference]: Finished difference Result 339 states and 380 transitions. [2021-12-07 01:15:19,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2021-12-07 01:15:19,931 INFO L78 Accepts]: Start accepts. Automaton has has 228 states, 228 states have (on average 1.1403508771929824) internal successors, (260), 228 states have internal predecessors, (260), 1 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 225 [2021-12-07 01:15:19,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:15:19,933 INFO L225 Difference]: With dead ends: 339 [2021-12-07 01:15:19,933 INFO L226 Difference]: Without dead ends: 329 [2021-12-07 01:15:19,937 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 472 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 250 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19225 ImplicationChecksByTransitivity, 30.2s TimeCoverageRelationStatistics Valid=10995, Invalid=52257, Unknown=0, NotChecked=0, Total=63252 [2021-12-07 01:15:19,937 INFO L933 BasicCegarLoop]: 194 mSDtfsCounter, 2849 mSDsluCounter, 21892 mSDsCounter, 0 mSdLazyCounter, 16707 mSolverCounterSat, 1743 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 45.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2849 SdHoareTripleChecker+Valid, 22086 SdHoareTripleChecker+Invalid, 18450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1743 IncrementalHoareTripleChecker+Valid, 16707 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 52.4s IncrementalHoareTripleChecker+Time [2021-12-07 01:15:19,937 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2849 Valid, 22086 Invalid, 18450 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1743 Valid, 16707 Invalid, 0 Unknown, 0 Unchecked, 52.4s Time] [2021-12-07 01:15:19,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2021-12-07 01:15:19,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 309. [2021-12-07 01:15:19,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 237 states have (on average 1.3291139240506329) internal successors, (315), 300 states have internal predecessors, (315), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-07 01:15:19,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 327 transitions. [2021-12-07 01:15:19,944 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 327 transitions. Word has length 225 [2021-12-07 01:15:19,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:15:19,945 INFO L470 AbstractCegarLoop]: Abstraction has 309 states and 327 transitions. [2021-12-07 01:15:19,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 228 states, 228 states have (on average 1.1403508771929824) internal successors, (260), 228 states have internal predecessors, (260), 1 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-07 01:15:19,945 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 327 transitions. [2021-12-07 01:15:19,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2021-12-07 01:15:19,946 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:15:19,946 INFO L514 BasicCegarLoop]: trace histogram [159, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:15:19,969 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-12-07 01:15:20,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:15:20,148 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-12-07 01:15:20,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:15:20,149 INFO L85 PathProgramCache]: Analyzing trace with hash 337465913, now seen corresponding path program 3 times [2021-12-07 01:15:20,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:15:20,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1947449403] [2021-12-07 01:15:20,152 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-07 01:15:20,152 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:15:20,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:15:20,153 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:15:20,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-12-07 01:15:20,637 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-07 01:15:20,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:15:20,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-07 01:15:20,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:15:20,695 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-07 01:15:20,974 INFO L354 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2021-12-07 01:15:20,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 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 30 [2021-12-07 01:15:21,921 INFO L354 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2021-12-07 01:15:21,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 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 29 treesize of output 38 [2021-12-07 01:15:22,079 INFO L134 CoverageAnalysis]: Checked inductivity of 13650 backedges. 3797 proven. 2262 refuted. 0 times theorem prover too weak. 7591 trivial. 0 not checked. [2021-12-07 01:15:22,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:15:22,206 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:15:22,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1947449403] [2021-12-07 01:15:22,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1947449403] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:15:22,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [295924721] [2021-12-07 01:15:22,206 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-07 01:15:22,206 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-07 01:15:22,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-07 01:15:22,207 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-07 01:15:22,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2021-12-07 01:15:23,184 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-07 01:15:23,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:15:23,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-07 01:15:23,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:15:23,529 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-07 01:15:23,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 33 [2021-12-07 01:15:24,369 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-12-07 01:15:24,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 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 26 [2021-12-07 01:15:24,391 INFO L134 CoverageAnalysis]: Checked inductivity of 13650 backedges. 3797 proven. 2262 refuted. 0 times theorem prover too weak. 7591 trivial. 0 not checked. [2021-12-07 01:15:24,391 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:15:25,731 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-07 01:15:25,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2021-12-07 01:15:25,765 INFO L134 CoverageAnalysis]: Checked inductivity of 13650 backedges. 3797 proven. 1175 refuted. 0 times theorem prover too weak. 8678 trivial. 0 not checked. [2021-12-07 01:15:25,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [295924721] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:15:25,765 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:15:25,766 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 10] total 24 [2021-12-07 01:15:25,766 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003711476] [2021-12-07 01:15:25,766 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:15:25,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-07 01:15:25,767 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:15:25,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-07 01:15:25,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=619, Unknown=0, NotChecked=0, Total=702 [2021-12-07 01:15:25,767 INFO L87 Difference]: Start difference. First operand 309 states and 327 transitions. Second operand has 25 states, 23 states have (on average 3.217391304347826) internal successors, (74), 20 states have internal predecessors, (74), 3 states have call successors, (9), 3 states have call predecessors, (9), 6 states have return successors, (10), 6 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-07 01:15:27,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:15:27,349 INFO L93 Difference]: Finished difference Result 592 states and 627 transitions. [2021-12-07 01:15:27,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-07 01:15:27,350 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 3.217391304347826) internal successors, (74), 20 states have internal predecessors, (74), 3 states have call successors, (9), 3 states have call predecessors, (9), 6 states have return successors, (10), 6 states have call predecessors, (10), 3 states have call successors, (10) Word has length 234 [2021-12-07 01:15:27,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:15:27,352 INFO L225 Difference]: With dead ends: 592 [2021-12-07 01:15:27,352 INFO L226 Difference]: Without dead ends: 592 [2021-12-07 01:15:27,352 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 714 GetRequests, 664 SyntacticMatches, 16 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=171, Invalid=1089, Unknown=0, NotChecked=0, Total=1260 [2021-12-07 01:15:27,353 INFO L933 BasicCegarLoop]: 149 mSDtfsCounter, 368 mSDsluCounter, 2071 mSDsCounter, 0 mSdLazyCounter, 733 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 368 SdHoareTripleChecker+Valid, 2220 SdHoareTripleChecker+Invalid, 2110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 733 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1374 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-07 01:15:27,353 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [368 Valid, 2220 Invalid, 2110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 733 Invalid, 0 Unknown, 1374 Unchecked, 1.2s Time] [2021-12-07 01:15:27,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2021-12-07 01:15:27,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 468. [2021-12-07 01:15:27,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 468 states, 392 states have (on average 1.2168367346938775) internal successors, (477), 455 states have internal predecessors, (477), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-07 01:15:27,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 493 transitions. [2021-12-07 01:15:27,362 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 493 transitions. Word has length 234 [2021-12-07 01:15:27,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:15:27,363 INFO L470 AbstractCegarLoop]: Abstraction has 468 states and 493 transitions. [2021-12-07 01:15:27,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 3.217391304347826) internal successors, (74), 20 states have internal predecessors, (74), 3 states have call successors, (9), 3 states have call predecessors, (9), 6 states have return successors, (10), 6 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-07 01:15:27,363 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 493 transitions. [2021-12-07 01:15:27,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2021-12-07 01:15:27,364 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:15:27,364 INFO L514 BasicCegarLoop]: trace histogram [159, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:15:27,371 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (18)] Ended with exit code 0 [2021-12-07 01:15:27,602 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2021-12-07 01:15:27,765 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:15:27,766 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-12-07 01:15:27,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:15:27,767 INFO L85 PathProgramCache]: Analyzing trace with hash 337465914, now seen corresponding path program 1 times [2021-12-07 01:15:27,770 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:15:27,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [970003698] [2021-12-07 01:15:27,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:15:27,771 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:15:27,771 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:15:27,771 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:15:27,772 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-12-07 01:15:30,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:15:30,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 2096 conjuncts, 44 conjunts are in the unsatisfiable core [2021-12-07 01:15:30,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:15:30,644 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-07 01:15:30,649 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-07 01:15:33,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:15:33,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 14 [2021-12-07 01:15:33,099 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-07 01:15:33,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2021-12-07 01:15:37,597 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 01:15:37,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 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 12 treesize of output 18 [2021-12-07 01:15:37,686 INFO L134 CoverageAnalysis]: Checked inductivity of 13650 backedges. 3797 proven. 2263 refuted. 0 times theorem prover too weak. 7590 trivial. 0 not checked. [2021-12-07 01:15:37,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:15:38,192 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:15:38,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [970003698] [2021-12-07 01:15:38,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [970003698] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:15:38,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [628262577] [2021-12-07 01:15:38,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:15:38,193 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-07 01:15:38,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-07 01:15:38,194 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-07 01:15:38,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2021-12-07 01:16:03,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:16:05,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 2096 conjuncts, 50 conjunts are in the unsatisfiable core [2021-12-07 01:16:05,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:16:05,074 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-07 01:16:05,084 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-07 01:16:07,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:16:07,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 14 [2021-12-07 01:16:07,381 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-07 01:16:07,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2021-12-07 01:16:07,775 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 01:16:07,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 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 12 treesize of output 18 [2021-12-07 01:16:07,818 INFO L134 CoverageAnalysis]: Checked inductivity of 13650 backedges. 3797 proven. 2263 refuted. 0 times theorem prover too weak. 7590 trivial. 0 not checked. [2021-12-07 01:16:07,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:16:08,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [628262577] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:16:08,180 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:16:08,180 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-12-07 01:16:08,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331362316] [2021-12-07 01:16:08,180 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:16:08,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-07 01:16:08,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:16:08,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-07 01:16:08,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=229, Unknown=3, NotChecked=0, Total=272 [2021-12-07 01:16:08,181 INFO L87 Difference]: Start difference. First operand 468 states and 493 transitions. Second operand has 15 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 states have internal predecessors, (51), 3 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-07 01:16:09,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:16:09,720 INFO L93 Difference]: Finished difference Result 468 states and 492 transitions. [2021-12-07 01:16:09,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-07 01:16:09,720 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 states have internal predecessors, (51), 3 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 234 [2021-12-07 01:16:09,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:16:09,722 INFO L225 Difference]: With dead ends: 468 [2021-12-07 01:16:09,722 INFO L226 Difference]: Without dead ends: 468 [2021-12-07 01:16:09,722 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 479 GetRequests, 457 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=67, Invalid=392, Unknown=3, NotChecked=0, Total=462 [2021-12-07 01:16:09,723 INFO L933 BasicCegarLoop]: 168 mSDtfsCounter, 1 mSDsluCounter, 1111 mSDsCounter, 0 mSdLazyCounter, 757 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 1279 SdHoareTripleChecker+Invalid, 958 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 757 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 186 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-07 01:16:09,723 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 1279 Invalid, 958 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 757 Invalid, 0 Unknown, 186 Unchecked, 1.2s Time] [2021-12-07 01:16:09,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2021-12-07 01:16:09,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 468. [2021-12-07 01:16:09,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 468 states, 392 states have (on average 1.2142857142857142) internal successors, (476), 455 states have internal predecessors, (476), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-07 01:16:09,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 492 transitions. [2021-12-07 01:16:09,733 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 492 transitions. Word has length 234 [2021-12-07 01:16:09,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:16:09,733 INFO L470 AbstractCegarLoop]: Abstraction has 468 states and 492 transitions. [2021-12-07 01:16:09,733 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 states have internal predecessors, (51), 3 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-07 01:16:09,733 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 492 transitions. [2021-12-07 01:16:09,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2021-12-07 01:16:09,734 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:16:09,734 INFO L514 BasicCegarLoop]: trace histogram [159, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:16:09,760 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (19)] Ended with exit code 0 [2021-12-07 01:16:10,042 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (20)] Forceful destruction successful, exit code 0 [2021-12-07 01:16:10,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt [2021-12-07 01:16:10,135 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-12-07 01:16:10,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:16:10,136 INFO L85 PathProgramCache]: Analyzing trace with hash -1071414732, now seen corresponding path program 1 times [2021-12-07 01:16:10,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:16:10,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1005136662] [2021-12-07 01:16:10,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:16:10,139 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:16:10,140 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:16:10,140 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:16:10,141 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-12-07 01:16:11,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:16:12,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 2116 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-07 01:16:12,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:16:12,302 INFO L134 CoverageAnalysis]: Checked inductivity of 13650 backedges. 264 proven. 1175 refuted. 0 times theorem prover too weak. 12211 trivial. 0 not checked. [2021-12-07 01:16:12,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:16:12,385 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 8 treesize of output 6 [2021-12-07 01:16:12,925 INFO L134 CoverageAnalysis]: Checked inductivity of 13650 backedges. 264 proven. 1175 refuted. 0 times theorem prover too weak. 12211 trivial. 0 not checked. [2021-12-07 01:16:12,925 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:16:12,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1005136662] [2021-12-07 01:16:12,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1005136662] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:16:12,925 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:16:12,926 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-12-07 01:16:12,926 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141945801] [2021-12-07 01:16:12,926 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:16:12,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-07 01:16:12,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:16:12,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-07 01:16:12,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-12-07 01:16:12,927 INFO L87 Difference]: Start difference. First operand 468 states and 492 transitions. Second operand has 18 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 3 states have call successors, (8), 1 states have call predecessors, (8), 3 states have return successors, (9), 5 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-07 01:16:14,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:16:14,876 INFO L93 Difference]: Finished difference Result 486 states and 516 transitions. [2021-12-07 01:16:14,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-07 01:16:14,877 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 3 states have call successors, (8), 1 states have call predecessors, (8), 3 states have return successors, (9), 5 states have call predecessors, (9), 3 states have call successors, (9) Word has length 237 [2021-12-07 01:16:14,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:16:14,878 INFO L225 Difference]: With dead ends: 486 [2021-12-07 01:16:14,879 INFO L226 Difference]: Without dead ends: 486 [2021-12-07 01:16:14,879 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 480 GetRequests, 458 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2021-12-07 01:16:14,879 INFO L933 BasicCegarLoop]: 147 mSDtfsCounter, 787 mSDsluCounter, 1125 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 788 SdHoareTripleChecker+Valid, 1272 SdHoareTripleChecker+Invalid, 502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-07 01:16:14,879 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [788 Valid, 1272 Invalid, 502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 481 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-07 01:16:14,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2021-12-07 01:16:14,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 467. [2021-12-07 01:16:14,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 392 states have (on average 1.2091836734693877) internal successors, (474), 454 states have internal predecessors, (474), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-07 01:16:14,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 490 transitions. [2021-12-07 01:16:14,887 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 490 transitions. Word has length 237 [2021-12-07 01:16:14,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:16:14,887 INFO L470 AbstractCegarLoop]: Abstraction has 467 states and 490 transitions. [2021-12-07 01:16:14,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 3 states have call successors, (8), 1 states have call predecessors, (8), 3 states have return successors, (9), 5 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-07 01:16:14,888 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 490 transitions. [2021-12-07 01:16:14,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2021-12-07 01:16:14,889 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:16:14,889 INFO L514 BasicCegarLoop]: trace histogram [159, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:16:14,914 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-12-07 01:16:15,089 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:16:15,090 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-12-07 01:16:15,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:16:15,092 INFO L85 PathProgramCache]: Analyzing trace with hash 1680652070, now seen corresponding path program 1 times [2021-12-07 01:16:15,095 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:16:15,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1395391258] [2021-12-07 01:16:15,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:16:15,096 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:16:15,096 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:16:15,098 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:16:15,101 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-12-07 01:16:18,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:16:18,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 2131 conjuncts, 29 conjunts are in the unsatisfiable core [2021-12-07 01:16:18,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:16:18,239 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-07 01:16:18,443 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-07 01:16:18,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 33 [2021-12-07 01:16:18,704 INFO L354 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2021-12-07 01:16:18,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 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 20 treesize of output 29 [2021-12-07 01:16:21,660 INFO L354 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2021-12-07 01:16:21,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 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 19 treesize of output 28 [2021-12-07 01:16:21,931 INFO L134 CoverageAnalysis]: Checked inductivity of 13650 backedges. 2711 proven. 2438 refuted. 1087 times theorem prover too weak. 7414 trivial. 0 not checked. [2021-12-07 01:16:21,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:16:22,085 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:16:22,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1395391258] [2021-12-07 01:16:22,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1395391258] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:16:22,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1700985968] [2021-12-07 01:16:22,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:16:22,085 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-07 01:16:22,085 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-07 01:16:22,086 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-07 01:16:22,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-12-07 01:16:41,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:16:41,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 2131 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-07 01:16:41,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:16:41,655 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-07 01:16:41,819 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-07 01:16:41,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 33 [2021-12-07 01:16:41,971 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-07 01:16:41,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 34 [2021-12-07 01:16:44,785 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-12-07 01:16:44,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 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 26 [2021-12-07 01:16:44,828 INFO L134 CoverageAnalysis]: Checked inductivity of 13650 backedges. 2711 proven. 1263 refuted. 2174 times theorem prover too weak. 7502 trivial. 0 not checked. [2021-12-07 01:16:44,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:16:50,250 INFO L134 CoverageAnalysis]: Checked inductivity of 13650 backedges. 2711 proven. 1263 refuted. 0 times theorem prover too weak. 9676 trivial. 0 not checked. [2021-12-07 01:16:50,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1700985968] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:16:50,250 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:16:50,250 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 11, 9] total 19 [2021-12-07 01:16:50,251 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849657790] [2021-12-07 01:16:50,251 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:16:50,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-07 01:16:50,251 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:16:50,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-07 01:16:50,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=401, Unknown=1, NotChecked=0, Total=462 [2021-12-07 01:16:50,252 INFO L87 Difference]: Start difference. First operand 467 states and 490 transitions. Second operand has 20 states, 18 states have (on average 4.277777777777778) internal successors, (77), 16 states have internal predecessors, (77), 3 states have call successors, (10), 3 states have call predecessors, (10), 6 states have return successors, (11), 5 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-07 01:17:07,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:17:07,642 INFO L93 Difference]: Finished difference Result 826 states and 864 transitions. [2021-12-07 01:17:07,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-07 01:17:07,643 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 4.277777777777778) internal successors, (77), 16 states have internal predecessors, (77), 3 states have call successors, (10), 3 states have call predecessors, (10), 6 states have return successors, (11), 5 states have call predecessors, (11), 3 states have call successors, (11) Word has length 240 [2021-12-07 01:17:07,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:17:07,645 INFO L225 Difference]: With dead ends: 826 [2021-12-07 01:17:07,645 INFO L226 Difference]: Without dead ends: 826 [2021-12-07 01:17:07,646 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 737 GetRequests, 687 SyntacticMatches, 22 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 25.7s TimeCoverageRelationStatistics Valid=129, Invalid=740, Unknown=1, NotChecked=0, Total=870 [2021-12-07 01:17:07,646 INFO L933 BasicCegarLoop]: 144 mSDtfsCounter, 366 mSDsluCounter, 1479 mSDsCounter, 0 mSdLazyCounter, 570 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 366 SdHoareTripleChecker+Valid, 1623 SdHoareTripleChecker+Invalid, 1286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 713 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-07 01:17:07,646 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [366 Valid, 1623 Invalid, 1286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 570 Invalid, 0 Unknown, 713 Unchecked, 0.9s Time] [2021-12-07 01:17:07,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 826 states. [2021-12-07 01:17:07,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 826 to 790. [2021-12-07 01:17:07,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 790 states, 707 states have (on average 1.1357850070721358) internal successors, (803), 768 states have internal predecessors, (803), 13 states have call successors, (13), 8 states have call predecessors, (13), 8 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-12-07 01:17:07,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 790 states to 790 states and 829 transitions. [2021-12-07 01:17:07,658 INFO L78 Accepts]: Start accepts. Automaton has 790 states and 829 transitions. Word has length 240 [2021-12-07 01:17:07,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:17:07,659 INFO L470 AbstractCegarLoop]: Abstraction has 790 states and 829 transitions. [2021-12-07 01:17:07,659 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 4.277777777777778) internal successors, (77), 16 states have internal predecessors, (77), 3 states have call successors, (10), 3 states have call predecessors, (10), 6 states have return successors, (11), 5 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-07 01:17:07,659 INFO L276 IsEmpty]: Start isEmpty. Operand 790 states and 829 transitions. [2021-12-07 01:17:07,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2021-12-07 01:17:07,660 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:17:07,660 INFO L514 BasicCegarLoop]: trace histogram [159, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:17:07,683 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (23)] Ended with exit code 0 [2021-12-07 01:17:07,922 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (22)] Ended with exit code 0 [2021-12-07 01:17:08,061 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:17:08,062 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-12-07 01:17:08,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:17:08,063 INFO L85 PathProgramCache]: Analyzing trace with hash 1680652071, now seen corresponding path program 1 times [2021-12-07 01:17:08,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:17:08,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1852545392] [2021-12-07 01:17:08,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:17:08,067 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:17:08,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:17:08,067 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:17:08,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-12-07 01:17:10,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:17:11,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 2131 conjuncts, 59 conjunts are in the unsatisfiable core [2021-12-07 01:17:11,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:17:11,060 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-07 01:17:11,065 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-07 01:17:11,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:17:11,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 14 [2021-12-07 01:17:11,488 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-07 01:17:11,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-12-07 01:17:13,868 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 01:17:13,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 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 12 treesize of output 18 [2021-12-07 01:17:18,509 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 01:17:18,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 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 16 treesize of output 22 [2021-12-07 01:17:19,369 INFO L134 CoverageAnalysis]: Checked inductivity of 13650 backedges. 2711 proven. 3527 refuted. 0 times theorem prover too weak. 7412 trivial. 0 not checked. [2021-12-07 01:17:19,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:17:20,296 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:17:20,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1852545392] [2021-12-07 01:17:20,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1852545392] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:17:20,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [865630269] [2021-12-07 01:17:20,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:17:20,297 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-07 01:17:20,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-07 01:17:20,298 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-07 01:17:20,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2021-12-07 01:17:56,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:17:58,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 2131 conjuncts, 58 conjunts are in the unsatisfiable core [2021-12-07 01:17:58,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:17:58,164 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-07 01:17:58,169 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-07 01:17:58,685 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-07 01:17:58,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 34 [2021-12-07 01:17:58,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 14 [2021-12-07 01:18:00,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:18:00,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 14 [2021-12-07 01:18:00,950 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-07 01:18:00,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2021-12-07 01:18:01,374 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 01:18:01,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 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 12 treesize of output 18 [2021-12-07 01:18:01,595 INFO L134 CoverageAnalysis]: Checked inductivity of 13650 backedges. 2711 proven. 3527 refuted. 0 times theorem prover too weak. 7412 trivial. 0 not checked. [2021-12-07 01:18:01,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:18:02,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [865630269] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:18:02,171 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:18:02,172 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 15] total 23 [2021-12-07 01:18:02,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716728696] [2021-12-07 01:18:02,172 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:18:02,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-07 01:18:02,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:18:02,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-07 01:18:02,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=671, Unknown=3, NotChecked=0, Total=756 [2021-12-07 01:18:02,173 INFO L87 Difference]: Start difference. First operand 790 states and 829 transitions. Second operand has 24 states, 22 states have (on average 3.9545454545454546) internal successors, (87), 19 states have internal predecessors, (87), 4 states have call successors, (8), 3 states have call predecessors, (8), 6 states have return successors, (9), 7 states have call predecessors, (9), 4 states have call successors, (9) [2021-12-07 01:18:04,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:18:04,431 INFO L93 Difference]: Finished difference Result 816 states and 860 transitions. [2021-12-07 01:18:04,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-07 01:18:04,431 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 3.9545454545454546) internal successors, (87), 19 states have internal predecessors, (87), 4 states have call successors, (8), 3 states have call predecessors, (8), 6 states have return successors, (9), 7 states have call predecessors, (9), 4 states have call successors, (9) Word has length 240 [2021-12-07 01:18:04,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:18:04,434 INFO L225 Difference]: With dead ends: 816 [2021-12-07 01:18:04,434 INFO L226 Difference]: Without dead ends: 816 [2021-12-07 01:18:04,434 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 506 GetRequests, 470 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=144, Invalid=1113, Unknown=3, NotChecked=0, Total=1260 [2021-12-07 01:18:04,435 INFO L933 BasicCegarLoop]: 164 mSDtfsCounter, 3 mSDsluCounter, 2095 mSDsCounter, 0 mSdLazyCounter, 834 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 2259 SdHoareTripleChecker+Invalid, 1504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 834 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 655 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-07 01:18:04,435 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 2259 Invalid, 1504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 834 Invalid, 0 Unknown, 655 Unchecked, 1.5s Time] [2021-12-07 01:18:04,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 816 states. [2021-12-07 01:18:04,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 816 to 816. [2021-12-07 01:18:04,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 816 states, 731 states have (on average 1.1381668946648427) internal successors, (832), 793 states have internal predecessors, (832), 14 states have call successors, (14), 9 states have call predecessors, (14), 9 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2021-12-07 01:18:04,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 816 states to 816 states and 860 transitions. [2021-12-07 01:18:04,447 INFO L78 Accepts]: Start accepts. Automaton has 816 states and 860 transitions. Word has length 240 [2021-12-07 01:18:04,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:18:04,447 INFO L470 AbstractCegarLoop]: Abstraction has 816 states and 860 transitions. [2021-12-07 01:18:04,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 3.9545454545454546) internal successors, (87), 19 states have internal predecessors, (87), 4 states have call successors, (8), 3 states have call predecessors, (8), 6 states have return successors, (9), 7 states have call predecessors, (9), 4 states have call successors, (9) [2021-12-07 01:18:04,448 INFO L276 IsEmpty]: Start isEmpty. Operand 816 states and 860 transitions. [2021-12-07 01:18:04,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2021-12-07 01:18:04,449 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:18:04,449 INFO L514 BasicCegarLoop]: trace histogram [159, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:18:04,475 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (24)] Ended with exit code 0 [2021-12-07 01:18:04,766 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (25)] Ended with exit code 0 [2021-12-07 01:18:04,850 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt [2021-12-07 01:18:04,850 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-12-07 01:18:04,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:18:04,851 INFO L85 PathProgramCache]: Analyzing trace with hash 560606651, now seen corresponding path program 1 times [2021-12-07 01:18:04,854 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:18:04,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [460272995] [2021-12-07 01:18:04,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:18:04,854 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:18:04,855 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:18:04,855 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:18:04,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-12-07 01:18:07,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:18:07,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 2137 conjuncts, 42 conjunts are in the unsatisfiable core [2021-12-07 01:18:07,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:18:07,885 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-07 01:18:07,891 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-07 01:18:10,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:18:10,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 14 [2021-12-07 01:18:10,362 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-07 01:18:10,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 23 [2021-12-07 01:18:14,927 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 01:18:14,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 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 12 treesize of output 18 [2021-12-07 01:18:15,146 INFO L134 CoverageAnalysis]: Checked inductivity of 13650 backedges. 3797 proven. 2263 refuted. 0 times theorem prover too weak. 7590 trivial. 0 not checked. [2021-12-07 01:18:15,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:18:15,764 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:18:15,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [460272995] [2021-12-07 01:18:15,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [460272995] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:18:15,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1837182159] [2021-12-07 01:18:15,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:18:15,765 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-07 01:18:15,765 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-07 01:18:15,765 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-07 01:18:15,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2021-12-07 01:18:49,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:18:51,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 2137 conjuncts, 52 conjunts are in the unsatisfiable core [2021-12-07 01:18:51,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:18:51,168 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-07 01:18:51,174 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-07 01:18:51,712 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-07 01:18:51,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2021-12-07 01:18:51,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 14 [2021-12-07 01:18:56,242 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 01:18:56,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 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 12 treesize of output 18 [2021-12-07 01:18:56,418 INFO L134 CoverageAnalysis]: Checked inductivity of 13650 backedges. 3797 proven. 2263 refuted. 0 times theorem prover too weak. 7590 trivial. 0 not checked. [2021-12-07 01:18:56,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:18:56,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1837182159] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:18:56,839 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:18:56,839 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17] total 18 [2021-12-07 01:18:56,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917556154] [2021-12-07 01:18:56,839 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:18:56,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-07 01:18:56,840 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:18:56,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-07 01:18:56,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=362, Unknown=3, NotChecked=0, Total=420 [2021-12-07 01:18:56,840 INFO L87 Difference]: Start difference. First operand 816 states and 860 transitions. Second operand has 19 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 15 states have internal predecessors, (68), 3 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-07 01:18:58,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:18:58,344 INFO L93 Difference]: Finished difference Result 822 states and 869 transitions. [2021-12-07 01:18:58,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-07 01:18:58,345 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 15 states have internal predecessors, (68), 3 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) Word has length 241 [2021-12-07 01:18:58,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:18:58,347 INFO L225 Difference]: With dead ends: 822 [2021-12-07 01:18:58,348 INFO L226 Difference]: Without dead ends: 822 [2021-12-07 01:18:58,348 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 506 GetRequests, 480 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 11.5s TimeCoverageRelationStatistics Valid=79, Invalid=518, Unknown=3, NotChecked=0, Total=600 [2021-12-07 01:18:58,348 INFO L933 BasicCegarLoop]: 160 mSDtfsCounter, 3 mSDsluCounter, 1454 mSDsCounter, 0 mSdLazyCounter, 664 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 1614 SdHoareTripleChecker+Invalid, 977 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 298 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-07 01:18:58,348 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 1614 Invalid, 977 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 664 Invalid, 0 Unknown, 298 Unchecked, 1.2s Time] [2021-12-07 01:18:58,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 822 states. [2021-12-07 01:18:58,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 822 to 820. [2021-12-07 01:18:58,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 820 states, 735 states have (on average 1.1428571428571428) internal successors, (840), 797 states have internal predecessors, (840), 14 states have call successors, (14), 9 states have call predecessors, (14), 9 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2021-12-07 01:18:58,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 820 states to 820 states and 868 transitions. [2021-12-07 01:18:58,360 INFO L78 Accepts]: Start accepts. Automaton has 820 states and 868 transitions. Word has length 241 [2021-12-07 01:18:58,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:18:58,360 INFO L470 AbstractCegarLoop]: Abstraction has 820 states and 868 transitions. [2021-12-07 01:18:58,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 15 states have internal predecessors, (68), 3 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-07 01:18:58,360 INFO L276 IsEmpty]: Start isEmpty. Operand 820 states and 868 transitions. [2021-12-07 01:18:58,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2021-12-07 01:18:58,361 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:18:58,361 INFO L514 BasicCegarLoop]: trace histogram [159, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:18:58,389 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-12-07 01:18:58,712 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (27)] Ended with exit code 0 [2021-12-07 01:18:58,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt [2021-12-07 01:18:58,763 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-12-07 01:18:58,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:18:58,763 INFO L85 PathProgramCache]: Analyzing trace with hash 560606650, now seen corresponding path program 1 times [2021-12-07 01:18:58,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:18:58,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [572006861] [2021-12-07 01:18:58,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:18:58,765 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:18:58,765 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:18:58,765 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:18:58,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-12-07 01:19:00,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:19:00,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 2137 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-07 01:19:00,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:19:01,067 INFO L134 CoverageAnalysis]: Checked inductivity of 13650 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13650 trivial. 0 not checked. [2021-12-07 01:19:01,067 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:19:01,067 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:19:01,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [572006861] [2021-12-07 01:19:01,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [572006861] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:19:01,067 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:19:01,067 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 01:19:01,067 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483873438] [2021-12-07 01:19:01,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:19:01,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-07 01:19:01,068 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:19:01,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-07 01:19:01,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-07 01:19:01,068 INFO L87 Difference]: Start difference. First operand 820 states and 868 transitions. Second operand has 4 states, 3 states have (on average 10.333333333333334) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-07 01:19:01,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:19:01,336 INFO L93 Difference]: Finished difference Result 858 states and 909 transitions. [2021-12-07 01:19:01,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-07 01:19:01,336 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 10.333333333333334) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 241 [2021-12-07 01:19:01,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:19:01,339 INFO L225 Difference]: With dead ends: 858 [2021-12-07 01:19:01,339 INFO L226 Difference]: Without dead ends: 858 [2021-12-07 01:19:01,339 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 239 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 01:19:01,340 INFO L933 BasicCegarLoop]: 155 mSDtfsCounter, 259 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-07 01:19:01,340 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [261 Valid, 268 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-07 01:19:01,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 858 states. [2021-12-07 01:19:01,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 858 to 818. [2021-12-07 01:19:01,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 818 states, 735 states have (on average 1.1374149659863946) internal successors, (836), 795 states have internal predecessors, (836), 14 states have call successors, (14), 9 states have call predecessors, (14), 9 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2021-12-07 01:19:01,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 818 states to 818 states and 864 transitions. [2021-12-07 01:19:01,355 INFO L78 Accepts]: Start accepts. Automaton has 818 states and 864 transitions. Word has length 241 [2021-12-07 01:19:01,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:19:01,356 INFO L470 AbstractCegarLoop]: Abstraction has 818 states and 864 transitions. [2021-12-07 01:19:01,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 10.333333333333334) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-07 01:19:01,356 INFO L276 IsEmpty]: Start isEmpty. Operand 818 states and 864 transitions. [2021-12-07 01:19:01,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2021-12-07 01:19:01,357 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:19:01,357 INFO L514 BasicCegarLoop]: trace histogram [159, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:19:01,392 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (28)] Ended with exit code 0 [2021-12-07 01:19:01,557 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:19:01,558 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-12-07 01:19:01,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:19:01,558 INFO L85 PathProgramCache]: Analyzing trace with hash 1872079772, now seen corresponding path program 1 times [2021-12-07 01:19:01,559 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:19:01,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1889385871] [2021-12-07 01:19:01,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:19:01,559 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:19:01,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:19:01,560 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:19:01,561 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-12-07 01:19:03,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:19:03,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 2151 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-07 01:19:03,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:19:03,981 INFO L134 CoverageAnalysis]: Checked inductivity of 13650 backedges. 176 proven. 1263 refuted. 0 times theorem prover too weak. 12211 trivial. 0 not checked. [2021-12-07 01:19:03,981 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:19:04,069 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 8 treesize of output 6 [2021-12-07 01:19:04,639 INFO L134 CoverageAnalysis]: Checked inductivity of 13650 backedges. 176 proven. 1263 refuted. 0 times theorem prover too weak. 12211 trivial. 0 not checked. [2021-12-07 01:19:04,639 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:19:04,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1889385871] [2021-12-07 01:19:04,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1889385871] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:19:04,639 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:19:04,640 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-12-07 01:19:04,640 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278092767] [2021-12-07 01:19:04,640 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:19:04,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-07 01:19:04,640 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:19:04,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-07 01:19:04,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-12-07 01:19:04,641 INFO L87 Difference]: Start difference. First operand 818 states and 864 transitions. Second operand has 18 states, 17 states have (on average 4.0) internal successors, (68), 16 states have internal predecessors, (68), 3 states have call successors, (9), 1 states have call predecessors, (9), 3 states have return successors, (10), 5 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-07 01:19:06,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:19:06,543 INFO L93 Difference]: Finished difference Result 831 states and 882 transitions. [2021-12-07 01:19:06,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-07 01:19:06,544 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 4.0) internal successors, (68), 16 states have internal predecessors, (68), 3 states have call successors, (9), 1 states have call predecessors, (9), 3 states have return successors, (10), 5 states have call predecessors, (10), 3 states have call successors, (10) Word has length 243 [2021-12-07 01:19:06,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:19:06,547 INFO L225 Difference]: With dead ends: 831 [2021-12-07 01:19:06,547 INFO L226 Difference]: Without dead ends: 831 [2021-12-07 01:19:06,547 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 492 GetRequests, 470 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2021-12-07 01:19:06,547 INFO L933 BasicCegarLoop]: 144 mSDtfsCounter, 734 mSDsluCounter, 1241 mSDsCounter, 0 mSdLazyCounter, 480 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 735 SdHoareTripleChecker+Valid, 1385 SdHoareTripleChecker+Invalid, 497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-07 01:19:06,547 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [735 Valid, 1385 Invalid, 497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 480 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-07 01:19:06,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 831 states. [2021-12-07 01:19:06,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 831 to 817. [2021-12-07 01:19:06,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 817 states, 735 states have (on average 1.1360544217687074) internal successors, (835), 794 states have internal predecessors, (835), 14 states have call successors, (14), 9 states have call predecessors, (14), 9 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2021-12-07 01:19:06,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 817 states to 817 states and 863 transitions. [2021-12-07 01:19:06,558 INFO L78 Accepts]: Start accepts. Automaton has 817 states and 863 transitions. Word has length 243 [2021-12-07 01:19:06,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:19:06,559 INFO L470 AbstractCegarLoop]: Abstraction has 817 states and 863 transitions. [2021-12-07 01:19:06,559 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 4.0) internal successors, (68), 16 states have internal predecessors, (68), 3 states have call successors, (9), 1 states have call predecessors, (9), 3 states have return successors, (10), 5 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-07 01:19:06,559 INFO L276 IsEmpty]: Start isEmpty. Operand 817 states and 863 transitions. [2021-12-07 01:19:06,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2021-12-07 01:19:06,560 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:19:06,560 INFO L514 BasicCegarLoop]: trace histogram [159, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:19:06,595 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (29)] Ended with exit code 0 [2021-12-07 01:19:06,760 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:19:06,761 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-12-07 01:19:06,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:19:06,761 INFO L85 PathProgramCache]: Analyzing trace with hash 978159155, now seen corresponding path program 1 times [2021-12-07 01:19:06,762 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:19:06,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2034847762] [2021-12-07 01:19:06,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:19:06,762 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:19:06,762 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:19:06,763 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:19:06,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-12-07 01:19:09,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:19:09,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 2166 conjuncts, 40 conjunts are in the unsatisfiable core [2021-12-07 01:19:09,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:19:09,630 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-07 01:19:09,935 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-07 01:19:09,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 37 [2021-12-07 01:19:10,302 INFO L354 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2021-12-07 01:19:10,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 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 30 [2021-12-07 01:19:10,717 INFO L354 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2021-12-07 01:19:10,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 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 25 treesize of output 34 [2021-12-07 01:19:14,119 INFO L354 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2021-12-07 01:19:14,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 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 25 treesize of output 34 [2021-12-07 01:19:16,681 INFO L134 CoverageAnalysis]: Checked inductivity of 13650 backedges. 1447 proven. 3701 refuted. 1087 times theorem prover too weak. 7415 trivial. 0 not checked. [2021-12-07 01:19:16,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:19:17,050 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:19:17,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2034847762] [2021-12-07 01:19:17,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2034847762] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:19:17,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1439009430] [2021-12-07 01:19:17,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:19:17,050 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-07 01:19:17,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-07 01:19:17,051 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-07 01:19:17,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2021-12-07 01:19:37,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:19:37,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 2166 conjuncts, 49 conjunts are in the unsatisfiable core [2021-12-07 01:19:37,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:19:37,439 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-07 01:19:37,872 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-07 01:19:37,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 35 [2021-12-07 01:19:38,554 INFO L354 Elim1Store]: treesize reduction 30, result has 45.5 percent of original size [2021-12-07 01:19:38,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 36 treesize of output 53 [2021-12-07 01:19:39,030 INFO L354 Elim1Store]: treesize reduction 14, result has 64.1 percent of original size [2021-12-07 01:19:39,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 52 [2021-12-07 01:19:42,606 INFO L354 Elim1Store]: treesize reduction 14, result has 64.1 percent of original size [2021-12-07 01:19:42,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 50 [2021-12-07 01:19:44,211 INFO L134 CoverageAnalysis]: Checked inductivity of 13650 backedges. 1535 proven. 4788 refuted. 0 times theorem prover too weak. 7327 trivial. 0 not checked. [2021-12-07 01:19:44,211 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:19:44,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1439009430] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:19:44,503 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:19:44,504 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 28] total 36 [2021-12-07 01:19:44,504 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726394790] [2021-12-07 01:19:44,504 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:19:44,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-12-07 01:19:44,504 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:19:44,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-12-07 01:19:44,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=1502, Unknown=1, NotChecked=0, Total=1722 [2021-12-07 01:19:44,505 INFO L87 Difference]: Start difference. First operand 817 states and 863 transitions. Second operand has 37 states, 34 states have (on average 3.235294117647059) internal successors, (110), 29 states have internal predecessors, (110), 6 states have call successors, (9), 2 states have call predecessors, (9), 7 states have return successors, (10), 10 states have call predecessors, (10), 6 states have call successors, (10) [2021-12-07 01:19:45,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:19:45,785 INFO L93 Difference]: Finished difference Result 1546 states and 1634 transitions. [2021-12-07 01:19:45,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-07 01:19:45,786 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 34 states have (on average 3.235294117647059) internal successors, (110), 29 states have internal predecessors, (110), 6 states have call successors, (9), 2 states have call predecessors, (9), 7 states have return successors, (10), 10 states have call predecessors, (10), 6 states have call successors, (10) Word has length 246 [2021-12-07 01:19:45,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:19:45,790 INFO L225 Difference]: With dead ends: 1546 [2021-12-07 01:19:45,790 INFO L226 Difference]: Without dead ends: 1546 [2021-12-07 01:19:45,791 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 532 GetRequests, 468 SyntacticMatches, 15 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 927 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=313, Invalid=2236, Unknown=1, NotChecked=0, Total=2550 [2021-12-07 01:19:45,791 INFO L933 BasicCegarLoop]: 141 mSDtfsCounter, 154 mSDsluCounter, 1788 mSDsCounter, 0 mSdLazyCounter, 369 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 1929 SdHoareTripleChecker+Invalid, 1005 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 635 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-07 01:19:45,791 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 1929 Invalid, 1005 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 369 Invalid, 0 Unknown, 635 Unchecked, 0.6s Time] [2021-12-07 01:19:45,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1546 states. [2021-12-07 01:19:45,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1546 to 1504. [2021-12-07 01:19:45,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1504 states, 1401 states have (on average 1.0999286224125624) internal successors, (1541), 1461 states have internal predecessors, (1541), 26 states have call successors, (26), 18 states have call predecessors, (26), 18 states have return successors, (26), 24 states have call predecessors, (26), 26 states have call successors, (26) [2021-12-07 01:19:45,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1504 states to 1504 states and 1593 transitions. [2021-12-07 01:19:45,811 INFO L78 Accepts]: Start accepts. Automaton has 1504 states and 1593 transitions. Word has length 246 [2021-12-07 01:19:45,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:19:45,811 INFO L470 AbstractCegarLoop]: Abstraction has 1504 states and 1593 transitions. [2021-12-07 01:19:45,811 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 34 states have (on average 3.235294117647059) internal successors, (110), 29 states have internal predecessors, (110), 6 states have call successors, (9), 2 states have call predecessors, (9), 7 states have return successors, (10), 10 states have call predecessors, (10), 6 states have call successors, (10) [2021-12-07 01:19:45,811 INFO L276 IsEmpty]: Start isEmpty. Operand 1504 states and 1593 transitions. [2021-12-07 01:19:45,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2021-12-07 01:19:45,812 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:19:45,812 INFO L514 BasicCegarLoop]: trace histogram [159, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:19:45,853 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (30)] Ended with exit code 0 [2021-12-07 01:19:46,049 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (31)] Ended with exit code 0 [2021-12-07 01:19:46,213 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt [2021-12-07 01:19:46,214 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-12-07 01:19:46,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:19:46,214 INFO L85 PathProgramCache]: Analyzing trace with hash 978159156, now seen corresponding path program 1 times [2021-12-07 01:19:46,217 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:19:46,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [233315868] [2021-12-07 01:19:46,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:19:46,217 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:19:46,217 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:19:46,218 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:19:46,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-12-07 01:19:50,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:19:50,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 2166 conjuncts, 90 conjunts are in the unsatisfiable core [2021-12-07 01:19:50,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:19:50,269 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-07 01:19:50,276 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-07 01:19:50,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:19:50,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 14 [2021-12-07 01:19:50,777 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-07 01:19:50,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 22 [2021-12-07 01:19:51,226 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 01:19:51,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 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 12 treesize of output 18 [2021-12-07 01:19:51,453 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-07 01:19:51,895 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 01:19:51,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 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 16 treesize of output 22 [2021-12-07 01:19:57,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:19:57,070 INFO L354 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-12-07 01:19:57,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 30 [2021-12-07 01:19:57,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:19:57,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-12-07 01:19:58,435 INFO L134 CoverageAnalysis]: Checked inductivity of 13650 backedges. 2536 proven. 3791 refuted. 0 times theorem prover too weak. 7323 trivial. 0 not checked. [2021-12-07 01:19:58,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:20:01,679 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:20:01,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [233315868] [2021-12-07 01:20:01,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [233315868] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:20:01,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1948819009] [2021-12-07 01:20:01,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:20:01,680 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-07 01:20:01,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-07 01:20:01,680 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-07 01:20:01,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2021-12-07 01:20:39,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:20:40,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 2166 conjuncts, 87 conjunts are in the unsatisfiable core [2021-12-07 01:20:40,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:20:40,539 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-07 01:20:40,546 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-07 01:20:41,430 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-07 01:20:41,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 34 [2021-12-07 01:20:41,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 14 [2021-12-07 01:20:42,534 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-12-07 01:20:42,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 32 [2021-12-07 01:20:42,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 14 [2021-12-07 01:20:42,861 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 01:20:42,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 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 12 treesize of output 18 [2021-12-07 01:20:43,793 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 01:20:43,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 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 16 treesize of output 22 [2021-12-07 01:20:45,702 INFO L134 CoverageAnalysis]: Checked inductivity of 13650 backedges. 1447 proven. 4880 refuted. 0 times theorem prover too weak. 7323 trivial. 0 not checked. [2021-12-07 01:20:45,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:20:46,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1948819009] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:20:46,831 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:20:46,831 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 32] total 45 [2021-12-07 01:20:46,831 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119646101] [2021-12-07 01:20:46,831 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:20:46,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-12-07 01:20:46,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:20:46,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-12-07 01:20:46,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=2361, Unknown=3, NotChecked=0, Total=2550 [2021-12-07 01:20:46,832 INFO L87 Difference]: Start difference. First operand 1504 states and 1593 transitions. Second operand has 46 states, 40 states have (on average 3.2) internal successors, (128), 37 states have internal predecessors, (128), 7 states have call successors, (9), 3 states have call predecessors, (9), 9 states have return successors, (10), 10 states have call predecessors, (10), 7 states have call successors, (10) [2021-12-07 01:20:50,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:20:50,780 INFO L93 Difference]: Finished difference Result 1533 states and 1627 transitions. [2021-12-07 01:20:50,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-07 01:20:50,781 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 40 states have (on average 3.2) internal successors, (128), 37 states have internal predecessors, (128), 7 states have call successors, (9), 3 states have call predecessors, (9), 9 states have return successors, (10), 10 states have call predecessors, (10), 7 states have call successors, (10) Word has length 246 [2021-12-07 01:20:50,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:20:50,785 INFO L225 Difference]: With dead ends: 1533 [2021-12-07 01:20:50,785 INFO L226 Difference]: Without dead ends: 1533 [2021-12-07 01:20:50,786 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 536 GetRequests, 472 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 696 ImplicationChecksByTransitivity, 12.9s TimeCoverageRelationStatistics Valid=317, Invalid=3712, Unknown=3, NotChecked=0, Total=4032 [2021-12-07 01:20:50,786 INFO L933 BasicCegarLoop]: 156 mSDtfsCounter, 12 mSDsluCounter, 3235 mSDsCounter, 0 mSdLazyCounter, 1339 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 3391 SdHoareTripleChecker+Invalid, 2377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1022 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-07 01:20:50,786 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 3391 Invalid, 2377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1339 Invalid, 0 Unknown, 1022 Unchecked, 2.3s Time] [2021-12-07 01:20:50,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1533 states. [2021-12-07 01:20:50,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1533 to 1533. [2021-12-07 01:20:50,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1533 states, 1428 states have (on average 1.1015406162464987) internal successors, (1573), 1489 states have internal predecessors, (1573), 27 states have call successors, (27), 19 states have call predecessors, (27), 19 states have return successors, (27), 24 states have call predecessors, (27), 27 states have call successors, (27) [2021-12-07 01:20:50,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1533 states to 1533 states and 1627 transitions. [2021-12-07 01:20:50,806 INFO L78 Accepts]: Start accepts. Automaton has 1533 states and 1627 transitions. Word has length 246 [2021-12-07 01:20:50,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:20:50,806 INFO L470 AbstractCegarLoop]: Abstraction has 1533 states and 1627 transitions. [2021-12-07 01:20:50,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 40 states have (on average 3.2) internal successors, (128), 37 states have internal predecessors, (128), 7 states have call successors, (9), 3 states have call predecessors, (9), 9 states have return successors, (10), 10 states have call predecessors, (10), 7 states have call successors, (10) [2021-12-07 01:20:50,807 INFO L276 IsEmpty]: Start isEmpty. Operand 1533 states and 1627 transitions. [2021-12-07 01:20:50,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2021-12-07 01:20:50,808 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:20:50,808 INFO L514 BasicCegarLoop]: trace histogram [159, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:20:50,942 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (33)] Ended with exit code 0 [2021-12-07 01:20:51,046 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (32)] Ended with exit code 0 [2021-12-07 01:20:51,209 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:20:51,209 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-12-07 01:20:51,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:20:51,211 INFO L85 PathProgramCache]: Analyzing trace with hash 258162786, now seen corresponding path program 1 times [2021-12-07 01:20:51,214 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:20:51,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1184401291] [2021-12-07 01:20:51,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:20:51,215 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:20:51,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:20:51,217 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:20:51,220 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-12-07 01:20:53,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:20:53,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 2172 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-07 01:20:53,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:20:53,797 INFO L134 CoverageAnalysis]: Checked inductivity of 13650 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13650 trivial. 0 not checked. [2021-12-07 01:20:53,797 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:20:53,797 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:20:53,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1184401291] [2021-12-07 01:20:53,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1184401291] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:20:53,797 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:20:53,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 01:20:53,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615633638] [2021-12-07 01:20:53,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:20:53,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-07 01:20:53,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:20:53,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-07 01:20:53,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-07 01:20:53,798 INFO L87 Difference]: Start difference. First operand 1533 states and 1627 transitions. Second operand has 4 states, 3 states have (on average 12.333333333333334) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-07 01:20:54,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:20:54,087 INFO L93 Difference]: Finished difference Result 1567 states and 1664 transitions. [2021-12-07 01:20:54,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-07 01:20:54,088 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 12.333333333333334) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 247 [2021-12-07 01:20:54,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:20:54,092 INFO L225 Difference]: With dead ends: 1567 [2021-12-07 01:20:54,092 INFO L226 Difference]: Without dead ends: 1567 [2021-12-07 01:20:54,093 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 245 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 01:20:54,093 INFO L933 BasicCegarLoop]: 153 mSDtfsCounter, 236 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-07 01:20:54,093 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [237 Valid, 264 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-07 01:20:54,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1567 states. [2021-12-07 01:20:54,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1567 to 1532. [2021-12-07 01:20:54,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1532 states, 1428 states have (on average 1.1008403361344539) internal successors, (1572), 1488 states have internal predecessors, (1572), 27 states have call successors, (27), 19 states have call predecessors, (27), 19 states have return successors, (27), 24 states have call predecessors, (27), 27 states have call successors, (27) [2021-12-07 01:20:54,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1532 states to 1532 states and 1626 transitions. [2021-12-07 01:20:54,112 INFO L78 Accepts]: Start accepts. Automaton has 1532 states and 1626 transitions. Word has length 247 [2021-12-07 01:20:54,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:20:54,113 INFO L470 AbstractCegarLoop]: Abstraction has 1532 states and 1626 transitions. [2021-12-07 01:20:54,113 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 12.333333333333334) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-07 01:20:54,113 INFO L276 IsEmpty]: Start isEmpty. Operand 1532 states and 1626 transitions. [2021-12-07 01:20:54,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2021-12-07 01:20:54,114 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:20:54,114 INFO L514 BasicCegarLoop]: trace histogram [159, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:20:54,141 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (34)] Ended with exit code 0 [2021-12-07 01:20:54,314 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:20:54,315 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-12-07 01:20:54,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:20:54,315 INFO L85 PathProgramCache]: Analyzing trace with hash 258162787, now seen corresponding path program 1 times [2021-12-07 01:20:54,316 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:20:54,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [574196235] [2021-12-07 01:20:54,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:20:54,316 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:20:54,316 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:20:54,317 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:20:54,318 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-12-07 01:20:56,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:20:56,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 2172 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-07 01:20:56,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:20:57,089 INFO L134 CoverageAnalysis]: Checked inductivity of 13650 backedges. 176 proven. 1263 refuted. 0 times theorem prover too weak. 12211 trivial. 0 not checked. [2021-12-07 01:20:57,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:20:57,188 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 01:20:57,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2021-12-07 01:20:58,328 INFO L134 CoverageAnalysis]: Checked inductivity of 13650 backedges. 176 proven. 1263 refuted. 0 times theorem prover too weak. 12211 trivial. 0 not checked. [2021-12-07 01:20:58,328 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:20:58,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [574196235] [2021-12-07 01:20:58,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [574196235] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:20:58,328 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:20:58,329 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-12-07 01:20:58,329 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075636623] [2021-12-07 01:20:58,329 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:20:58,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-07 01:20:58,329 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:20:58,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-07 01:20:58,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-12-07 01:20:58,330 INFO L87 Difference]: Start difference. First operand 1532 states and 1626 transitions. Second operand has 18 states, 17 states have (on average 4.470588235294118) internal successors, (76), 16 states have internal predecessors, (76), 3 states have call successors, (9), 1 states have call predecessors, (9), 3 states have return successors, (10), 5 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-07 01:21:00,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:21:00,557 INFO L93 Difference]: Finished difference Result 1540 states and 1637 transitions. [2021-12-07 01:21:00,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-07 01:21:00,558 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 4.470588235294118) internal successors, (76), 16 states have internal predecessors, (76), 3 states have call successors, (9), 1 states have call predecessors, (9), 3 states have return successors, (10), 5 states have call predecessors, (10), 3 states have call successors, (10) Word has length 247 [2021-12-07 01:21:00,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:21:00,562 INFO L225 Difference]: With dead ends: 1540 [2021-12-07 01:21:00,562 INFO L226 Difference]: Without dead ends: 1540 [2021-12-07 01:21:00,562 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 497 GetRequests, 477 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2021-12-07 01:21:00,562 INFO L933 BasicCegarLoop]: 141 mSDtfsCounter, 439 mSDsluCounter, 1212 mSDsCounter, 0 mSdLazyCounter, 497 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 440 SdHoareTripleChecker+Valid, 1353 SdHoareTripleChecker+Invalid, 512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 497 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-07 01:21:00,562 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [440 Valid, 1353 Invalid, 512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 497 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-07 01:21:00,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1540 states. [2021-12-07 01:21:00,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1540 to 1531. [2021-12-07 01:21:00,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1531 states, 1428 states have (on average 1.100140056022409) internal successors, (1571), 1487 states have internal predecessors, (1571), 27 states have call successors, (27), 19 states have call predecessors, (27), 19 states have return successors, (27), 24 states have call predecessors, (27), 27 states have call successors, (27) [2021-12-07 01:21:00,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1531 states to 1531 states and 1625 transitions. [2021-12-07 01:21:00,579 INFO L78 Accepts]: Start accepts. Automaton has 1531 states and 1625 transitions. Word has length 247 [2021-12-07 01:21:00,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:21:00,579 INFO L470 AbstractCegarLoop]: Abstraction has 1531 states and 1625 transitions. [2021-12-07 01:21:00,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 4.470588235294118) internal successors, (76), 16 states have internal predecessors, (76), 3 states have call successors, (9), 1 states have call predecessors, (9), 3 states have return successors, (10), 5 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-07 01:21:00,579 INFO L276 IsEmpty]: Start isEmpty. Operand 1531 states and 1625 transitions. [2021-12-07 01:21:00,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2021-12-07 01:21:00,580 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:21:00,580 INFO L514 BasicCegarLoop]: trace histogram [159, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:21:00,617 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (35)] Ended with exit code 0 [2021-12-07 01:21:00,781 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:21:00,781 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-12-07 01:21:00,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:21:00,782 INFO L85 PathProgramCache]: Analyzing trace with hash -1013664029, now seen corresponding path program 1 times [2021-12-07 01:21:00,786 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:21:00,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1742623213] [2021-12-07 01:21:00,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:21:00,786 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:21:00,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:21:00,787 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:21:00,788 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2021-12-07 01:21:03,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:03,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 2186 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-07 01:21:03,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:21:03,430 INFO L134 CoverageAnalysis]: Checked inductivity of 13650 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13650 trivial. 0 not checked. [2021-12-07 01:21:03,431 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:21:03,431 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:21:03,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1742623213] [2021-12-07 01:21:03,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1742623213] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:21:03,431 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:21:03,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-07 01:21:03,431 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685633563] [2021-12-07 01:21:03,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:21:03,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 01:21:03,431 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:21:03,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 01:21:03,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:21:03,432 INFO L87 Difference]: Start difference. First operand 1531 states and 1625 transitions. Second operand has 3 states, 2 states have (on average 19.5) internal successors, (39), 3 states have internal predecessors, (39), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-07 01:21:03,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:21:03,659 INFO L93 Difference]: Finished difference Result 1560 states and 1656 transitions. [2021-12-07 01:21:03,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 01:21:03,659 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 19.5) internal successors, (39), 3 states have internal predecessors, (39), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 249 [2021-12-07 01:21:03,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:21:03,663 INFO L225 Difference]: With dead ends: 1560 [2021-12-07 01:21:03,663 INFO L226 Difference]: Without dead ends: 1560 [2021-12-07 01:21:03,663 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 247 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 01:21:03,664 INFO L933 BasicCegarLoop]: 154 mSDtfsCounter, 62 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-07 01:21:03,664 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 246 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-07 01:21:03,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1560 states. [2021-12-07 01:21:03,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1560 to 1530. [2021-12-07 01:21:03,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1530 states, 1428 states have (on average 1.0994397759103642) internal successors, (1570), 1486 states have internal predecessors, (1570), 27 states have call successors, (27), 19 states have call predecessors, (27), 19 states have return successors, (27), 24 states have call predecessors, (27), 27 states have call successors, (27) [2021-12-07 01:21:03,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1530 states to 1530 states and 1624 transitions. [2021-12-07 01:21:03,680 INFO L78 Accepts]: Start accepts. Automaton has 1530 states and 1624 transitions. Word has length 249 [2021-12-07 01:21:03,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:21:03,680 INFO L470 AbstractCegarLoop]: Abstraction has 1530 states and 1624 transitions. [2021-12-07 01:21:03,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 19.5) internal successors, (39), 3 states have internal predecessors, (39), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-07 01:21:03,680 INFO L276 IsEmpty]: Start isEmpty. Operand 1530 states and 1624 transitions. [2021-12-07 01:21:03,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2021-12-07 01:21:03,681 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:21:03,682 INFO L514 BasicCegarLoop]: trace histogram [159, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:21:03,708 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (36)] Ended with exit code 0 [2021-12-07 01:21:03,882 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:21:03,883 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-12-07 01:21:03,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:21:03,884 INFO L85 PathProgramCache]: Analyzing trace with hash -1013664028, now seen corresponding path program 1 times [2021-12-07 01:21:03,887 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:21:03,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1997077321] [2021-12-07 01:21:03,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:21:03,888 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:21:03,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:21:03,890 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:21:03,893 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2021-12-07 01:21:06,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:06,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 2186 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-07 01:21:06,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:21:06,543 INFO L134 CoverageAnalysis]: Checked inductivity of 13650 backedges. 88 proven. 1351 refuted. 0 times theorem prover too weak. 12211 trivial. 0 not checked. [2021-12-07 01:21:06,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:21:06,655 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 8 treesize of output 6 [2021-12-07 01:21:07,383 INFO L134 CoverageAnalysis]: Checked inductivity of 13650 backedges. 88 proven. 1351 refuted. 0 times theorem prover too weak. 12211 trivial. 0 not checked. [2021-12-07 01:21:07,383 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:21:07,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1997077321] [2021-12-07 01:21:07,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1997077321] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:21:07,383 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:21:07,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-12-07 01:21:07,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360046942] [2021-12-07 01:21:07,384 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:21:07,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-07 01:21:07,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:21:07,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-07 01:21:07,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-12-07 01:21:07,384 INFO L87 Difference]: Start difference. First operand 1530 states and 1624 transitions. Second operand has 18 states, 17 states have (on average 4.823529411764706) internal successors, (82), 16 states have internal predecessors, (82), 3 states have call successors, (10), 1 states have call predecessors, (10), 3 states have return successors, (11), 5 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-07 01:21:09,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:21:09,190 INFO L93 Difference]: Finished difference Result 1538 states and 1635 transitions. [2021-12-07 01:21:09,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-07 01:21:09,191 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 4.823529411764706) internal successors, (82), 16 states have internal predecessors, (82), 3 states have call successors, (10), 1 states have call predecessors, (10), 3 states have return successors, (11), 5 states have call predecessors, (11), 3 states have call successors, (11) Word has length 249 [2021-12-07 01:21:09,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:21:09,195 INFO L225 Difference]: With dead ends: 1538 [2021-12-07 01:21:09,195 INFO L226 Difference]: Without dead ends: 1538 [2021-12-07 01:21:09,195 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 504 GetRequests, 482 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2021-12-07 01:21:09,195 INFO L933 BasicCegarLoop]: 142 mSDtfsCounter, 411 mSDsluCounter, 1234 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 412 SdHoareTripleChecker+Valid, 1376 SdHoareTripleChecker+Invalid, 445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-07 01:21:09,196 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [412 Valid, 1376 Invalid, 445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 437 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-07 01:21:09,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1538 states. [2021-12-07 01:21:09,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1538 to 1529. [2021-12-07 01:21:09,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1529 states, 1428 states have (on average 1.0987394957983194) internal successors, (1569), 1485 states have internal predecessors, (1569), 27 states have call successors, (27), 19 states have call predecessors, (27), 19 states have return successors, (27), 24 states have call predecessors, (27), 27 states have call successors, (27) [2021-12-07 01:21:09,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1529 states to 1529 states and 1623 transitions. [2021-12-07 01:21:09,212 INFO L78 Accepts]: Start accepts. Automaton has 1529 states and 1623 transitions. Word has length 249 [2021-12-07 01:21:09,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:21:09,213 INFO L470 AbstractCegarLoop]: Abstraction has 1529 states and 1623 transitions. [2021-12-07 01:21:09,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 4.823529411764706) internal successors, (82), 16 states have internal predecessors, (82), 3 states have call successors, (10), 1 states have call predecessors, (10), 3 states have return successors, (11), 5 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-07 01:21:09,213 INFO L276 IsEmpty]: Start isEmpty. Operand 1529 states and 1623 transitions. [2021-12-07 01:21:09,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2021-12-07 01:21:09,214 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:21:09,214 INFO L514 BasicCegarLoop]: trace histogram [159, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:21:09,241 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2021-12-07 01:21:09,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:21:09,415 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-12-07 01:21:09,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:21:09,417 INFO L85 PathProgramCache]: Analyzing trace with hash -149969056, now seen corresponding path program 1 times [2021-12-07 01:21:09,418 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:21:09,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [468324460] [2021-12-07 01:21:09,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:21:09,419 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:21:09,419 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:21:09,419 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:21:09,420 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2021-12-07 01:21:12,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:21:12,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 2201 conjuncts, 51 conjunts are in the unsatisfiable core [2021-12-07 01:21:12,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:21:12,810 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-07 01:21:13,102 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-07 01:21:13,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 36 [2021-12-07 01:21:13,492 INFO L354 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2021-12-07 01:21:13,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 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 22 treesize of output 31 [2021-12-07 01:21:13,792 INFO L354 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2021-12-07 01:21:13,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 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 30 treesize of output 39 [2021-12-07 01:21:14,115 INFO L354 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2021-12-07 01:21:14,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 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 34 treesize of output 43 [2021-12-07 01:21:17,301 INFO L354 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2021-12-07 01:21:17,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 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 39 treesize of output 48 [2021-12-07 01:21:18,557 INFO L134 CoverageAnalysis]: Checked inductivity of 13650 backedges. 5 proven. 4964 refuted. 1087 times theorem prover too weak. 7594 trivial. 0 not checked. [2021-12-07 01:21:18,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:21:19,084 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:21:19,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [468324460] [2021-12-07 01:21:19,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [468324460] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:21:19,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1750267507] [2021-12-07 01:21:19,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:21:19,084 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-07 01:21:19,085 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-07 01:21:19,085 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-07 01:21:19,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1980aaee-45ae-45cf-962c-28a00549fde8/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (39)] Waiting until timeout for monitored process