./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 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety/test-0234-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF --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 0.2.1-dev-53f42b1 [2021-11-20 07:33:47,883 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 07:33:47,885 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 07:33:47,946 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 07:33:47,947 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 07:33:47,952 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 07:33:47,954 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 07:33:47,959 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 07:33:47,962 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 07:33:47,970 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 07:33:47,971 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 07:33:47,972 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 07:33:47,973 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 07:33:47,974 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 07:33:47,975 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 07:33:47,977 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 07:33:47,978 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 07:33:47,979 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 07:33:47,981 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 07:33:47,989 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 07:33:47,991 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 07:33:47,994 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 07:33:48,000 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 07:33:48,001 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 07:33:48,010 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 07:33:48,010 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 07:33:48,011 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 07:33:48,013 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 07:33:48,014 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 07:33:48,015 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 07:33:48,016 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 07:33:48,018 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 07:33:48,019 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 07:33:48,021 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 07:33:48,022 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 07:33:48,023 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 07:33:48,023 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 07:33:48,024 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 07:33:48,024 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 07:33:48,025 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 07:33:48,026 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 07:33:48,027 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-11-20 07:33:48,081 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 07:33:48,081 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 07:33:48,082 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 07:33:48,082 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 07:33:48,090 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 07:33:48,091 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 07:33:48,091 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 07:33:48,092 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 07:33:48,092 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 07:33:48,092 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 07:33:48,093 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 07:33:48,094 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-20 07:33:48,094 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 07:33:48,094 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 07:33:48,095 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 07:33:48,095 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-20 07:33:48,095 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-20 07:33:48,095 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-20 07:33:48,096 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 07:33:48,096 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-20 07:33:48,096 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 07:33:48,097 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 07:33:48,097 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 07:33:48,097 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 07:33:48,098 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 07:33:48,098 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 07:33:48,098 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 07:33:48,098 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 07:33:48,099 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 07:33:48,100 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 07:33:48,101 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 07:33:48,101 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_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3248e88e6fd49fdcf0a9f78f1aa9e69276951d353f75f39f6bb30d51b2e53989 [2021-11-20 07:33:48,411 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 07:33:48,446 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 07:33:48,449 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 07:33:48,450 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 07:33:48,451 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 07:33:48,453 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/memsafety/test-0234-2.i [2021-11-20 07:33:48,510 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/data/ecf9c121a/09c3848144b046339255d3b35e7336dc/FLAGe5c16dd81 [2021-11-20 07:33:49,136 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 07:33:49,136 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/sv-benchmarks/c/memsafety/test-0234-2.i [2021-11-20 07:33:49,161 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/data/ecf9c121a/09c3848144b046339255d3b35e7336dc/FLAGe5c16dd81 [2021-11-20 07:33:49,370 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/data/ecf9c121a/09c3848144b046339255d3b35e7336dc [2021-11-20 07:33:49,372 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 07:33:49,374 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 07:33:49,377 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 07:33:49,378 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 07:33:49,382 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 07:33:49,382 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:33:49" (1/1) ... [2021-11-20 07:33:49,384 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7da68b52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:33:49, skipping insertion in model container [2021-11-20 07:33:49,384 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:33:49" (1/1) ... [2021-11-20 07:33:49,392 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 07:33:49,456 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 07:33:49,889 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 07:33:49,905 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 07:33:49,981 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 07:33:50,032 INFO L208 MainTranslator]: Completed translation [2021-11-20 07:33:50,032 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:33:50 WrapperNode [2021-11-20 07:33:50,032 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 07:33:50,033 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 07:33:50,033 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 07:33:50,034 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 07:33:50,041 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:33:50" (1/1) ... [2021-11-20 07:33:50,061 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:33:50" (1/1) ... [2021-11-20 07:33:50,102 INFO L137 Inliner]: procedures = 188, calls = 58, calls flagged for inlining = 14, calls inlined = 14, statements flattened = 197 [2021-11-20 07:33:50,102 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 07:33:50,103 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 07:33:50,103 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 07:33:50,104 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 07:33:50,112 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:33:50" (1/1) ... [2021-11-20 07:33:50,112 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:33:50" (1/1) ... [2021-11-20 07:33:50,118 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:33:50" (1/1) ... [2021-11-20 07:33:50,118 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:33:50" (1/1) ... [2021-11-20 07:33:50,136 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:33:50" (1/1) ... [2021-11-20 07:33:50,143 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:33:50" (1/1) ... [2021-11-20 07:33:50,146 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:33:50" (1/1) ... [2021-11-20 07:33:50,152 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 07:33:50,153 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 07:33:50,153 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 07:33:50,153 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 07:33:50,154 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:33:50" (1/1) ... [2021-11-20 07:33:50,162 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 07:33:50,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:33:50,193 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 07:33:50,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 07:33:50,234 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-20 07:33:50,234 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 07:33:50,234 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-20 07:33:50,235 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-20 07:33:50,235 INFO L130 BoogieDeclarations]: Found specification of procedure zalloc_or_die [2021-11-20 07:33:50,235 INFO L138 BoogieDeclarations]: Found implementation of procedure zalloc_or_die [2021-11-20 07:33:50,235 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 07:33:50,235 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-20 07:33:50,236 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 07:33:50,236 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 07:33:50,236 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 07:33:50,373 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 07:33:50,375 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 07:33:50,924 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 07:33:50,965 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 07:33:50,972 INFO L301 CfgBuilder]: Removed 10 assume(true) statements. [2021-11-20 07:33:50,974 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:33:50 BoogieIcfgContainer [2021-11-20 07:33:50,974 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 07:33:50,976 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 07:33:50,976 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 07:33:50,980 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 07:33:50,980 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 07:33:49" (1/3) ... [2021-11-20 07:33:50,981 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c59115b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:33:50, skipping insertion in model container [2021-11-20 07:33:50,981 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:33:50" (2/3) ... [2021-11-20 07:33:50,981 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c59115b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:33:50, skipping insertion in model container [2021-11-20 07:33:50,981 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:33:50" (3/3) ... [2021-11-20 07:33:50,983 INFO L111 eAbstractionObserver]: Analyzing ICFG test-0234-2.i [2021-11-20 07:33:50,988 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 07:33:50,989 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 70 error locations. [2021-11-20 07:33:51,037 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 07:33:51,045 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 [2021-11-20 07:33:51,046 INFO L340 AbstractCegarLoop]: Starting to check reachability of 70 error locations. [2021-11-20 07:33:51,070 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) [2021-11-20 07:33:51,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-20 07:33:51,079 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:33:51,079 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-20 07:33:51,080 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr32REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-11-20 07:33:51,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:33:51,087 INFO L85 PathProgramCache]: Analyzing trace with hash 930118, now seen corresponding path program 1 times [2021-11-20 07:33:51,098 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:33:51,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602604501] [2021-11-20 07:33:51,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:33:51,100 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:33:51,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:33:51,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:33:51,253 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:33:51,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602604501] [2021-11-20 07:33:51,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602604501] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:33:51,255 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:33:51,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 07:33:51,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410817471] [2021-11-20 07:33:51,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:33:51,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-20 07:33:51,262 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:33:51,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-20 07:33:51,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 07:33:51,297 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) [2021-11-20 07:33:51,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:33:51,329 INFO L93 Difference]: Finished difference Result 182 states and 197 transitions. [2021-11-20 07:33:51,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 07:33:51,331 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 [2021-11-20 07:33:51,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:33:51,342 INFO L225 Difference]: With dead ends: 182 [2021-11-20 07:33:51,342 INFO L226 Difference]: Without dead ends: 180 [2021-11-20 07:33:51,344 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 [2021-11-20 07:33:51,348 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 [2021-11-20 07:33:51,350 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] [2021-11-20 07:33:51,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-11-20 07:33:51,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 180. [2021-11-20 07:33:51,402 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) [2021-11-20 07:33:51,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 195 transitions. [2021-11-20 07:33:51,409 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 195 transitions. Word has length 4 [2021-11-20 07:33:51,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:33:51,409 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 195 transitions. [2021-11-20 07:33:51,410 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) [2021-11-20 07:33:51,410 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 195 transitions. [2021-11-20 07:33:51,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-20 07:33:51,410 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:33:51,411 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-20 07:33:51,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 07:33:51,411 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)] === [2021-11-20 07:33:51,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:33:51,412 INFO L85 PathProgramCache]: Analyzing trace with hash 889833681, now seen corresponding path program 1 times [2021-11-20 07:33:51,413 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:33:51,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829375546] [2021-11-20 07:33:51,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:33:51,414 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:33:51,433 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:33:51,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1977183292] [2021-11-20 07:33:51,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:33:51,434 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:33:51,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:33:51,452 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:33:51,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 07:33:51,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:33:51,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 07:33:51,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:33:51,651 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 [2021-11-20 07:33:51,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:33:51,660 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:33:51,660 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:33:51,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829375546] [2021-11-20 07:33:51,661 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:33:51,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977183292] [2021-11-20 07:33:51,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977183292] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:33:51,667 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:33:51,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 07:33:51,668 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016076478] [2021-11-20 07:33:51,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:33:51,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 07:33:51,669 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:33:51,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 07:33:51,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:33:51,670 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) [2021-11-20 07:33:51,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:33:51,821 INFO L93 Difference]: Finished difference Result 179 states and 194 transitions. [2021-11-20 07:33:51,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:33:51,823 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 [2021-11-20 07:33:51,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:33:51,828 INFO L225 Difference]: With dead ends: 179 [2021-11-20 07:33:51,828 INFO L226 Difference]: Without dead ends: 179 [2021-11-20 07:33:51,831 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 [2021-11-20 07:33:51,833 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 [2021-11-20 07:33:51,834 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] [2021-11-20 07:33:51,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-11-20 07:33:51,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2021-11-20 07:33:51,858 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) [2021-11-20 07:33:51,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 194 transitions. [2021-11-20 07:33:51,864 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 194 transitions. Word has length 6 [2021-11-20 07:33:51,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:33:51,869 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 194 transitions. [2021-11-20 07:33:51,870 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) [2021-11-20 07:33:51,870 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 194 transitions. [2021-11-20 07:33:51,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-20 07:33:51,870 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:33:51,871 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:33:51,910 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 07:33:52,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:33:52,080 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)] === [2021-11-20 07:33:52,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:33:52,080 INFO L85 PathProgramCache]: Analyzing trace with hash 1815040656, now seen corresponding path program 1 times [2021-11-20 07:33:52,081 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:33:52,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019410237] [2021-11-20 07:33:52,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:33:52,081 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:33:52,095 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:33:52,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [808493606] [2021-11-20 07:33:52,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:33:52,095 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:33:52,096 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:33:52,097 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:33:52,112 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 07:33:52,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:33:52,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-20 07:33:52,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:33:52,315 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 14 treesize of output 13 [2021-11-20 07:33:52,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:33:52,484 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:33:52,484 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:33:52,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019410237] [2021-11-20 07:33:52,488 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:33:52,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808493606] [2021-11-20 07:33:52,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808493606] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:33:52,489 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:33:52,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 07:33:52,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406395252] [2021-11-20 07:33:52,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:33:52,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 07:33:52,492 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:33:52,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 07:33:52,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:33:52,494 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) [2021-11-20 07:33:52,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:33:52,508 INFO L93 Difference]: Finished difference Result 178 states and 193 transitions. [2021-11-20 07:33:52,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:33:52,508 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 [2021-11-20 07:33:52,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:33:52,513 INFO L225 Difference]: With dead ends: 178 [2021-11-20 07:33:52,513 INFO L226 Difference]: Without dead ends: 178 [2021-11-20 07:33:52,514 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 [2021-11-20 07:33:52,517 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 [2021-11-20 07:33:52,519 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] [2021-11-20 07:33:52,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-11-20 07:33:52,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 178. [2021-11-20 07:33:52,541 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) [2021-11-20 07:33:52,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 193 transitions. [2021-11-20 07:33:52,543 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 193 transitions. Word has length 7 [2021-11-20 07:33:52,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:33:52,544 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 193 transitions. [2021-11-20 07:33:52,544 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) [2021-11-20 07:33:52,544 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 193 transitions. [2021-11-20 07:33:52,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-20 07:33:52,547 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:33:52,548 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] [2021-11-20 07:33:52,575 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 07:33:52,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-11-20 07:33:52,759 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-11-20 07:33:52,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:33:52,760 INFO L85 PathProgramCache]: Analyzing trace with hash -1487051478, now seen corresponding path program 1 times [2021-11-20 07:33:52,760 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:33:52,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404473676] [2021-11-20 07:33:52,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:33:52,761 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:33:52,781 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:33:52,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1691925110] [2021-11-20 07:33:52,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:33:52,782 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:33:52,782 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:33:52,785 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:33:52,786 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 07:33:52,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:33:52,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-20 07:33:52,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:33:53,380 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 07:33:53,381 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 [2021-11-20 07:33:53,416 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 69 proven. 8 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-11-20 07:33:53,417 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:33:53,838 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-20 07:33:53,839 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 [2021-11-20 07:33:53,942 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 69 proven. 8 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-11-20 07:33:53,942 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:33:53,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404473676] [2021-11-20 07:33:53,942 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:33:53,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691925110] [2021-11-20 07:33:53,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691925110] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:33:53,943 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:33:53,943 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 13 [2021-11-20 07:33:53,944 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198548268] [2021-11-20 07:33:53,944 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:33:53,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-20 07:33:53,945 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:33:53,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-20 07:33:53,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-11-20 07:33:53,946 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) [2021-11-20 07:33:54,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:33:54,683 INFO L93 Difference]: Finished difference Result 220 states and 239 transitions. [2021-11-20 07:33:54,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-20 07:33:54,683 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 [2021-11-20 07:33:54,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:33:54,688 INFO L225 Difference]: With dead ends: 220 [2021-11-20 07:33:54,688 INFO L226 Difference]: Without dead ends: 220 [2021-11-20 07:33:54,689 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 132 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=115, Invalid=347, Unknown=0, NotChecked=0, Total=462 [2021-11-20 07:33:54,690 INFO L933 BasicCegarLoop]: 152 mSDtfsCounter, 132 mSDsluCounter, 1019 mSDsCounter, 0 mSdLazyCounter, 627 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 1171 SdHoareTripleChecker+Invalid, 815 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 627 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 186 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 07:33:54,690 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 1171 Invalid, 815 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 627 Invalid, 0 Unknown, 186 Unchecked, 0.5s Time] [2021-11-20 07:33:54,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-11-20 07:33:54,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 185. [2021-11-20 07:33:54,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 111 states have (on average 1.6936936936936937) 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) [2021-11-20 07:33:54,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 200 transitions. [2021-11-20 07:33:54,708 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 200 transitions. Word has length 73 [2021-11-20 07:33:54,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:33:54,709 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 200 transitions. [2021-11-20 07:33:54,709 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) [2021-11-20 07:33:54,710 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 200 transitions. [2021-11-20 07:33:54,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-20 07:33:54,713 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:33:54,713 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] [2021-11-20 07:33:54,758 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-20 07:33:54,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:33:54,935 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-11-20 07:33:54,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:33:54,936 INFO L85 PathProgramCache]: Analyzing trace with hash -1487051477, now seen corresponding path program 1 times [2021-11-20 07:33:54,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:33:54,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216523922] [2021-11-20 07:33:54,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:33:54,937 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:33:54,956 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:33:54,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1761436855] [2021-11-20 07:33:54,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:33:54,957 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:33:54,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:33:54,958 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:33:55,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 07:33:55,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:33:55,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 51 conjunts are in the unsatisfiable core [2021-11-20 07:33:55,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:33:55,299 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 12 treesize of output 11 [2021-11-20 07:33:56,251 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-11-20 07:33:56,251 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 36 treesize of output 36 [2021-11-20 07:33:56,275 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 07:33:56,276 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 35 treesize of output 35 [2021-11-20 07:33:58,917 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 69 proven. 8 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-11-20 07:33:58,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:33:59,187 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:33:59,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216523922] [2021-11-20 07:33:59,187 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:33:59,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761436855] [2021-11-20 07:33:59,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761436855] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:33:59,188 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:33:59,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-11-20 07:33:59,188 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356101323] [2021-11-20 07:33:59,188 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 07:33:59,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-20 07:33:59,189 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:33:59,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-20 07:33:59,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-11-20 07:33:59,190 INFO L87 Difference]: Start difference. First operand 185 states and 200 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) [2021-11-20 07:34:00,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:34:00,482 INFO L93 Difference]: Finished difference Result 184 states and 199 transitions. [2021-11-20 07:34:00,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-20 07:34:00,483 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 [2021-11-20 07:34:00,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:34:00,485 INFO L225 Difference]: With dead ends: 184 [2021-11-20 07:34:00,486 INFO L226 Difference]: Without dead ends: 184 [2021-11-20 07:34:00,486 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-11-20 07:34:00,487 INFO L933 BasicCegarLoop]: 176 mSDtfsCounter, 2 mSDsluCounter, 856 mSDsCounter, 0 mSdLazyCounter, 516 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1032 SdHoareTripleChecker+Invalid, 742 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 220 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-20 07:34:00,488 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1032 Invalid, 742 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 516 Invalid, 0 Unknown, 220 Unchecked, 0.7s Time] [2021-11-20 07:34:00,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-11-20 07:34:00,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 184. [2021-11-20 07:34:00,508 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, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-20 07:34:00,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 199 transitions. [2021-11-20 07:34:00,510 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 199 transitions. Word has length 73 [2021-11-20 07:34:00,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:34:00,511 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 199 transitions. [2021-11-20 07:34:00,522 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) [2021-11-20 07:34:00,522 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 199 transitions. [2021-11-20 07:34:00,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-20 07:34:00,524 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:34:00,525 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] [2021-11-20 07:34:00,569 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-20 07:34:00,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:34:00,739 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-11-20 07:34:00,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:34:00,740 INFO L85 PathProgramCache]: Analyzing trace with hash 1167639435, now seen corresponding path program 1 times [2021-11-20 07:34:00,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:34:00,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722781802] [2021-11-20 07:34:00,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:34:00,741 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:34:00,762 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:34:00,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1780636255] [2021-11-20 07:34:00,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:34:00,763 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:34:00,769 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:34:00,770 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:34:00,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-20 07:34:00,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:34:00,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 517 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-20 07:34:00,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:34:01,258 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 07:34:01,258 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 [2021-11-20 07:34:01,362 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 07:34:01,363 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 [2021-11-20 07:34:01,392 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 80 proven. 16 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-20 07:34:01,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:34:02,010 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-20 07:34:02,011 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 [2021-11-20 07:34:02,108 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 80 proven. 16 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-20 07:34:02,109 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:34:02,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722781802] [2021-11-20 07:34:02,109 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:34:02,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780636255] [2021-11-20 07:34:02,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780636255] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:34:02,111 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:34:02,111 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 14 [2021-11-20 07:34:02,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076826426] [2021-11-20 07:34:02,112 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:34:02,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-20 07:34:02,115 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:34:02,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-20 07:34:02,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-11-20 07:34:02,116 INFO L87 Difference]: Start difference. First operand 184 states and 199 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) [2021-11-20 07:34:02,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:34:02,932 INFO L93 Difference]: Finished difference Result 225 states and 244 transitions. [2021-11-20 07:34:02,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-20 07:34:02,933 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 [2021-11-20 07:34:02,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:34:02,935 INFO L225 Difference]: With dead ends: 225 [2021-11-20 07:34:02,936 INFO L226 Difference]: Without dead ends: 225 [2021-11-20 07:34:02,936 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 132 SyntacticMatches, 7 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=121, Invalid=431, Unknown=0, NotChecked=0, Total=552 [2021-11-20 07:34:02,937 INFO L933 BasicCegarLoop]: 147 mSDtfsCounter, 227 mSDsluCounter, 1153 mSDsCounter, 0 mSdLazyCounter, 780 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 1300 SdHoareTripleChecker+Invalid, 985 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 780 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 200 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-20 07:34:02,938 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [227 Valid, 1300 Invalid, 985 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 780 Invalid, 0 Unknown, 200 Unchecked, 0.6s Time] [2021-11-20 07:34:02,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-11-20 07:34:02,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 190. [2021-11-20 07:34:02,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 119 states have (on average 1.6218487394957983) internal successors, (193), 180 states have internal predecessors, (193), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-20 07:34:02,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 205 transitions. [2021-11-20 07:34:02,951 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 205 transitions. Word has length 75 [2021-11-20 07:34:02,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:34:02,952 INFO L470 AbstractCegarLoop]: Abstraction has 190 states and 205 transitions. [2021-11-20 07:34:02,952 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) [2021-11-20 07:34:02,952 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 205 transitions. [2021-11-20 07:34:02,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-20 07:34:02,954 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:34:02,955 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] [2021-11-20 07:34:02,984 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-20 07:34:03,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-20 07:34:03,167 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-11-20 07:34:03,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:34:03,168 INFO L85 PathProgramCache]: Analyzing trace with hash 1167639436, now seen corresponding path program 1 times [2021-11-20 07:34:03,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:34:03,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41262378] [2021-11-20 07:34:03,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:34:03,169 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:34:03,185 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:34:03,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [662031054] [2021-11-20 07:34:03,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:34:03,186 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:34:03,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:34:03,187 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:34:03,197 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-20 07:34:03,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:34:03,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 517 conjuncts, 69 conjunts are in the unsatisfiable core [2021-11-20 07:34:03,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:34:03,532 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 12 treesize of output 11 [2021-11-20 07:34:04,619 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-11-20 07:34:04,620 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 42 treesize of output 42 [2021-11-20 07:34:04,767 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-20 07:34:04,767 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 41 treesize of output 45 [2021-11-20 07:34:05,228 INFO L354 Elim1Store]: treesize reduction 40, result has 21.6 percent of original size [2021-11-20 07:34:05,228 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 3 case distinctions, treesize of input 52 treesize of output 55 [2021-11-20 07:34:05,362 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-11-20 07:34:05,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 53 [2021-11-20 07:34:11,790 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 80 proven. 24 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-20 07:34:11,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:34:11,991 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:34:11,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41262378] [2021-11-20 07:34:11,991 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:34:11,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662031054] [2021-11-20 07:34:11,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662031054] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:34:11,992 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:34:11,992 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-11-20 07:34:11,992 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504080897] [2021-11-20 07:34:11,992 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 07:34:11,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-20 07:34:11,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:34:11,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-20 07:34:11,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=232, Unknown=2, NotChecked=0, Total=272 [2021-11-20 07:34:11,994 INFO L87 Difference]: Start difference. First operand 190 states and 205 transitions. Second operand has 15 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 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) [2021-11-20 07:34:13,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:34:13,991 INFO L93 Difference]: Finished difference Result 197 states and 214 transitions. [2021-11-20 07:34:13,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-20 07:34:13,992 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 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 [2021-11-20 07:34:13,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:34:13,994 INFO L225 Difference]: With dead ends: 197 [2021-11-20 07:34:13,994 INFO L226 Difference]: Without dead ends: 197 [2021-11-20 07:34:13,994 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=65, Invalid=395, Unknown=2, NotChecked=0, Total=462 [2021-11-20 07:34:13,995 INFO L933 BasicCegarLoop]: 171 mSDtfsCounter, 3 mSDsluCounter, 1172 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 1343 SdHoareTripleChecker+Invalid, 984 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 487 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-20 07:34:13,996 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 1343 Invalid, 984 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 490 Invalid, 0 Unknown, 487 Unchecked, 0.8s Time] [2021-11-20 07:34:13,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-11-20 07:34:14,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 197. [2021-11-20 07:34:14,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 124 states have (on average 1.596774193548387) internal successors, (198), 185 states have internal predecessors, (198), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-20 07:34:14,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 214 transitions. [2021-11-20 07:34:14,005 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 214 transitions. Word has length 75 [2021-11-20 07:34:14,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:34:14,006 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 214 transitions. [2021-11-20 07:34:14,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 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) [2021-11-20 07:34:14,006 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 214 transitions. [2021-11-20 07:34:14,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-20 07:34:14,008 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:34:14,009 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] [2021-11-20 07:34:14,050 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-20 07:34:14,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-20 07:34:14,223 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-11-20 07:34:14,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:34:14,224 INFO L85 PathProgramCache]: Analyzing trace with hash 1837084129, now seen corresponding path program 1 times [2021-11-20 07:34:14,224 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:34:14,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235091864] [2021-11-20 07:34:14,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:34:14,224 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:34:14,239 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:34:14,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [518890686] [2021-11-20 07:34:14,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:34:14,240 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:34:14,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:34:14,241 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:34:14,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-20 07:34:14,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:34:14,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-20 07:34:14,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:34:14,675 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 32 proven. 8 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-11-20 07:34:14,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:34:14,714 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 [2021-11-20 07:34:14,909 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 32 proven. 8 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-11-20 07:34:14,910 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:34:14,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235091864] [2021-11-20 07:34:14,910 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:34:14,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518890686] [2021-11-20 07:34:14,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518890686] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:34:14,910 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:34:14,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-11-20 07:34:14,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186969485] [2021-11-20 07:34:14,911 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:34:14,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 07:34:14,911 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:34:14,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 07:34:14,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-11-20 07:34:14,912 INFO L87 Difference]: Start difference. First operand 197 states and 214 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) [2021-11-20 07:34:15,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:34:15,320 INFO L93 Difference]: Finished difference Result 215 states and 239 transitions. [2021-11-20 07:34:15,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 07:34:15,323 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 [2021-11-20 07:34:15,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:34:15,325 INFO L225 Difference]: With dead ends: 215 [2021-11-20 07:34:15,325 INFO L226 Difference]: Without dead ends: 215 [2021-11-20 07:34:15,326 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-11-20 07:34:15,327 INFO L933 BasicCegarLoop]: 152 mSDtfsCounter, 328 mSDsluCounter, 809 mSDsCounter, 0 mSdLazyCounter, 344 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 961 SdHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 07:34:15,327 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [331 Valid, 961 Invalid, 348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 344 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-20 07:34:15,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-11-20 07:34:15,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 196. [2021-11-20 07:34:15,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 124 states have (on average 1.5887096774193548) internal successors, (197), 184 states have internal predecessors, (197), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-20 07:34:15,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 213 transitions. [2021-11-20 07:34:15,337 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 213 transitions. Word has length 76 [2021-11-20 07:34:15,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:34:15,338 INFO L470 AbstractCegarLoop]: Abstraction has 196 states and 213 transitions. [2021-11-20 07:34:15,338 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) [2021-11-20 07:34:15,339 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 213 transitions. [2021-11-20 07:34:15,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-20 07:34:15,340 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:34:15,341 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] [2021-11-20 07:34:15,376 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-20 07:34:15,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:34:15,555 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-11-20 07:34:15,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:34:15,556 INFO L85 PathProgramCache]: Analyzing trace with hash 206288802, now seen corresponding path program 1 times [2021-11-20 07:34:15,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:34:15,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835767121] [2021-11-20 07:34:15,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:34:15,556 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:34:15,569 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:34:15,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [999308604] [2021-11-20 07:34:15,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:34:15,569 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:34:15,569 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:34:15,591 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:34:15,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-20 07:34:15,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:34:15,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 533 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 07:34:15,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:34:15,961 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2021-11-20 07:34:15,961 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:34:15,962 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:34:15,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835767121] [2021-11-20 07:34:15,962 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:34:15,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999308604] [2021-11-20 07:34:15,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999308604] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:34:15,962 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:34:15,962 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 07:34:15,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411450510] [2021-11-20 07:34:15,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:34:15,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 07:34:15,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:34:15,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 07:34:15,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:34:15,965 INFO L87 Difference]: Start difference. First operand 196 states and 213 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) [2021-11-20 07:34:16,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:34:16,090 INFO L93 Difference]: Finished difference Result 203 states and 224 transitions. [2021-11-20 07:34:16,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:34:16,091 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 [2021-11-20 07:34:16,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:34:16,093 INFO L225 Difference]: With dead ends: 203 [2021-11-20 07:34:16,093 INFO L226 Difference]: Without dead ends: 203 [2021-11-20 07:34:16,093 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 [2021-11-20 07:34:16,094 INFO L933 BasicCegarLoop]: 152 mSDtfsCounter, 150 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:34:16,095 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 182 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:34:16,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-11-20 07:34:16,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 195. [2021-11-20 07:34:16,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 124 states have (on average 1.5806451612903225) internal successors, (196), 183 states have internal predecessors, (196), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-20 07:34:16,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 212 transitions. [2021-11-20 07:34:16,104 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 212 transitions. Word has length 78 [2021-11-20 07:34:16,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:34:16,105 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 212 transitions. [2021-11-20 07:34:16,105 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) [2021-11-20 07:34:16,105 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 212 transitions. [2021-11-20 07:34:16,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-20 07:34:16,107 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:34:16,107 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] [2021-11-20 07:34:16,147 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-20 07:34:16,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-11-20 07:34:16,327 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-11-20 07:34:16,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:34:16,328 INFO L85 PathProgramCache]: Analyzing trace with hash 176026633, now seen corresponding path program 1 times [2021-11-20 07:34:16,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:34:16,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387207291] [2021-11-20 07:34:16,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:34:16,328 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:34:16,339 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:34:16,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1797872252] [2021-11-20 07:34:16,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:34:16,340 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:34:16,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:34:16,341 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:34:16,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-20 07:34:16,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:34:16,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 40 conjunts are in the unsatisfiable core [2021-11-20 07:34:16,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:34:16,825 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-20 07:34:16,826 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 [2021-11-20 07:34:17,025 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-11-20 07:34:17,025 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 3 case distinctions, treesize of input 21 treesize of output 26 [2021-11-20 07:34:17,146 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-11-20 07:34:17,146 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 3 case distinctions, treesize of input 21 treesize of output 26 [2021-11-20 07:34:17,302 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 73 proven. 40 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-20 07:34:17,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:34:17,874 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:34:17,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387207291] [2021-11-20 07:34:17,875 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:34:17,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797872252] [2021-11-20 07:34:17,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797872252] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:34:17,875 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:34:17,875 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-11-20 07:34:17,876 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424409986] [2021-11-20 07:34:17,876 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 07:34:17,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-20 07:34:17,876 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:34:17,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-20 07:34:17,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-11-20 07:34:17,877 INFO L87 Difference]: Start difference. First operand 195 states and 212 transitions. Second operand has 15 states, 13 states have (on average 4.153846153846154) internal successors, (54), 13 states have internal predecessors, (54), 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) [2021-11-20 07:34:18,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:34:18,400 INFO L93 Difference]: Finished difference Result 252 states and 279 transitions. [2021-11-20 07:34:18,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-20 07:34:18,400 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 4.153846153846154) internal successors, (54), 13 states have internal predecessors, (54), 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 82 [2021-11-20 07:34:18,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:34:18,403 INFO L225 Difference]: With dead ends: 252 [2021-11-20 07:34:18,403 INFO L226 Difference]: Without dead ends: 252 [2021-11-20 07:34:18,403 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 94 SyntacticMatches, 7 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2021-11-20 07:34:18,404 INFO L933 BasicCegarLoop]: 146 mSDtfsCounter, 158 mSDsluCounter, 1386 mSDsCounter, 0 mSdLazyCounter, 591 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 1532 SdHoareTripleChecker+Invalid, 905 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 305 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 07:34:18,405 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 1532 Invalid, 905 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 591 Invalid, 0 Unknown, 305 Unchecked, 0.4s Time] [2021-11-20 07:34:18,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-11-20 07:34:18,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 219. [2021-11-20 07:34:18,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 143 states have (on average 1.5244755244755244) internal successors, (218), 202 states have internal predecessors, (218), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-11-20 07:34:18,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 244 transitions. [2021-11-20 07:34:18,419 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 244 transitions. Word has length 82 [2021-11-20 07:34:18,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:34:18,420 INFO L470 AbstractCegarLoop]: Abstraction has 219 states and 244 transitions. [2021-11-20 07:34:18,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 4.153846153846154) internal successors, (54), 13 states have internal predecessors, (54), 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) [2021-11-20 07:34:18,420 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 244 transitions. [2021-11-20 07:34:18,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-20 07:34:18,422 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:34:18,422 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] [2021-11-20 07:34:18,467 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-20 07:34:18,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-20 07:34:18,647 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-11-20 07:34:18,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:34:18,648 INFO L85 PathProgramCache]: Analyzing trace with hash 176026634, now seen corresponding path program 1 times [2021-11-20 07:34:18,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:34:18,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675708046] [2021-11-20 07:34:18,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:34:18,648 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:34:18,676 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:34:18,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1039473722] [2021-11-20 07:34:18,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:34:18,682 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:34:18,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:34:18,684 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:34:18,706 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-20 07:34:18,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:34:18,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 78 conjunts are in the unsatisfiable core [2021-11-20 07:34:18,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:34:18,951 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 [2021-11-20 07:34:18,956 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 12 treesize of output 11 [2021-11-20 07:34:20,043 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-11-20 07:34:20,045 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 42 treesize of output 42 [2021-11-20 07:34:20,196 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-20 07:34:20,196 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 41 treesize of output 45 [2021-11-20 07:34:20,786 INFO L354 Elim1Store]: treesize reduction 40, result has 21.6 percent of original size [2021-11-20 07:34:20,786 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 3 case distinctions, treesize of input 58 treesize of output 61 [2021-11-20 07:34:20,872 INFO L354 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2021-11-20 07:34:20,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 57 treesize of output 68 [2021-11-20 07:34:21,646 INFO L354 Elim1Store]: treesize reduction 72, result has 18.2 percent of original size [2021-11-20 07:34:21,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 72 treesize of output 78 [2021-11-20 07:34:21,865 INFO L354 Elim1Store]: treesize reduction 36, result has 26.5 percent of original size [2021-11-20 07:34:21,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 75 [2021-11-20 07:34:31,984 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 73 proven. 40 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-20 07:34:31,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:34:32,288 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:34:32,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675708046] [2021-11-20 07:34:32,289 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:34:32,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039473722] [2021-11-20 07:34:32,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039473722] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:34:32,289 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:34:32,289 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-11-20 07:34:32,290 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955903496] [2021-11-20 07:34:32,290 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 07:34:32,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-20 07:34:32,290 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:34:32,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-20 07:34:32,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=258, Unknown=3, NotChecked=0, Total=306 [2021-11-20 07:34:32,291 INFO L87 Difference]: Start difference. First operand 219 states and 244 transitions. Second operand has 16 states, 14 states have (on average 3.857142857142857) internal successors, (54), 14 states have internal predecessors, (54), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-20 07:34:34,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:34:34,013 INFO L93 Difference]: Finished difference Result 257 states and 304 transitions. [2021-11-20 07:34:34,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-20 07:34:34,015 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 3.857142857142857) internal successors, (54), 14 states have internal predecessors, (54), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) Word has length 82 [2021-11-20 07:34:34,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:34:34,018 INFO L225 Difference]: With dead ends: 257 [2021-11-20 07:34:34,018 INFO L226 Difference]: Without dead ends: 257 [2021-11-20 07:34:34,019 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=72, Invalid=431, Unknown=3, NotChecked=0, Total=506 [2021-11-20 07:34:34,020 INFO L933 BasicCegarLoop]: 181 mSDtfsCounter, 10 mSDsluCounter, 1150 mSDsCounter, 0 mSdLazyCounter, 528 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 1331 SdHoareTripleChecker+Invalid, 960 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 528 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 425 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:34:34,021 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 1331 Invalid, 960 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 528 Invalid, 0 Unknown, 425 Unchecked, 1.0s Time] [2021-11-20 07:34:34,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2021-11-20 07:34:34,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 243. [2021-11-20 07:34:34,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 163 states have (on average 1.4723926380368098) internal successors, (240), 222 states have internal predecessors, (240), 16 states have call successors, (16), 3 states have call predecessors, (16), 4 states have return successors, (22), 17 states have call predecessors, (22), 16 states have call successors, (22) [2021-11-20 07:34:34,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 278 transitions. [2021-11-20 07:34:34,040 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 278 transitions. Word has length 82 [2021-11-20 07:34:34,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:34:34,041 INFO L470 AbstractCegarLoop]: Abstraction has 243 states and 278 transitions. [2021-11-20 07:34:34,041 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 3.857142857142857) internal successors, (54), 14 states have internal predecessors, (54), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-20 07:34:34,041 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 278 transitions. [2021-11-20 07:34:34,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-20 07:34:34,043 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:34:34,043 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] [2021-11-20 07:34:34,084 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-20 07:34:34,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-20 07:34:34,267 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-11-20 07:34:34,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:34:34,268 INFO L85 PathProgramCache]: Analyzing trace with hash 1200562017, now seen corresponding path program 1 times [2021-11-20 07:34:34,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:34:34,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443274043] [2021-11-20 07:34:34,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:34:34,268 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:34:34,281 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:34:34,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [201367559] [2021-11-20 07:34:34,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:34:34,282 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:34:34,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:34:34,299 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:34:34,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-20 07:34:34,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:34:34,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 551 conjuncts, 97 conjunts are in the unsatisfiable core [2021-11-20 07:34:34,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:34:34,597 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 [2021-11-20 07:34:35,172 INFO L354 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2021-11-20 07:34:35,172 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 14 treesize of output 20 [2021-11-20 07:34:35,233 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-20 07:34:35,233 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 [2021-11-20 07:34:35,620 INFO L354 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2021-11-20 07:34:35,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 26 treesize of output 37 [2021-11-20 07:34:35,647 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 14 treesize of output 16 [2021-11-20 07:34:36,158 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-11-20 07:34:36,163 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 46 treesize of output 48 [2021-11-20 07:34:36,194 INFO L354 Elim1Store]: treesize reduction 36, result has 26.5 percent of original size [2021-11-20 07:34:36,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 49 [2021-11-20 07:34:36,345 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 75 proven. 44 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-20 07:34:36,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:34:36,585 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:34:36,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443274043] [2021-11-20 07:34:36,585 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:34:36,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201367559] [2021-11-20 07:34:36,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201367559] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:34:36,585 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:34:36,585 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2021-11-20 07:34:36,586 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642848049] [2021-11-20 07:34:36,586 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 07:34:36,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-20 07:34:36,586 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:34:36,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-20 07:34:36,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2021-11-20 07:34:36,588 INFO L87 Difference]: Start difference. First operand 243 states and 278 transitions. Second operand has 23 states, 19 states have (on average 3.0) internal successors, (57), 19 states have internal predecessors, (57), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-20 07:34:37,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:34:37,741 INFO L93 Difference]: Finished difference Result 413 states and 464 transitions. [2021-11-20 07:34:37,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-20 07:34:37,742 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 19 states have (on average 3.0) internal successors, (57), 19 states have internal predecessors, (57), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) Word has length 83 [2021-11-20 07:34:37,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:34:37,746 INFO L225 Difference]: With dead ends: 413 [2021-11-20 07:34:37,747 INFO L226 Difference]: Without dead ends: 413 [2021-11-20 07:34:37,748 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=117, Invalid=813, Unknown=0, NotChecked=0, Total=930 [2021-11-20 07:34:37,749 INFO L933 BasicCegarLoop]: 112 mSDtfsCounter, 171 mSDsluCounter, 1184 mSDsCounter, 0 mSdLazyCounter, 1060 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 1296 SdHoareTripleChecker+Invalid, 1538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1060 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 464 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-20 07:34:37,749 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 1296 Invalid, 1538 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1060 Invalid, 0 Unknown, 464 Unchecked, 0.8s Time] [2021-11-20 07:34:37,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2021-11-20 07:34:37,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 229. [2021-11-20 07:34:37,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 153 states have (on average 1.5032679738562091) internal successors, (230), 212 states have internal predecessors, (230), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-11-20 07:34:37,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 256 transitions. [2021-11-20 07:34:37,764 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 256 transitions. Word has length 83 [2021-11-20 07:34:37,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:34:37,765 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 256 transitions. [2021-11-20 07:34:37,765 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 19 states have (on average 3.0) internal successors, (57), 19 states have internal predecessors, (57), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-20 07:34:37,765 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 256 transitions. [2021-11-20 07:34:37,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-20 07:34:37,766 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:34:37,766 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] [2021-11-20 07:34:37,804 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-20 07:34:37,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:34:37,983 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-11-20 07:34:37,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:34:37,984 INFO L85 PathProgramCache]: Analyzing trace with hash 1161858361, now seen corresponding path program 1 times [2021-11-20 07:34:37,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:34:37,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447110172] [2021-11-20 07:34:37,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:34:37,984 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:34:37,996 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:34:38,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [312096755] [2021-11-20 07:34:38,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:34:38,005 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:34:38,005 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:34:38,007 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:34:38,047 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-20 07:34:38,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:34:38,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 553 conjuncts, 62 conjunts are in the unsatisfiable core [2021-11-20 07:34:38,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:34:38,382 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 [2021-11-20 07:34:38,390 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 20 treesize of output 19 [2021-11-20 07:34:42,616 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-11-20 07:34:42,617 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 57 treesize of output 59 [2021-11-20 07:34:42,647 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-20 07:34:42,647 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 56 treesize of output 60 [2021-11-20 07:34:44,482 INFO L354 Elim1Store]: treesize reduction 40, result has 21.6 percent of original size [2021-11-20 07:34:44,482 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 3 case distinctions, treesize of input 67 treesize of output 72 [2021-11-20 07:34:44,521 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-11-20 07:34:44,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 68 [2021-11-20 07:34:57,620 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 78 proven. 28 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-20 07:34:57,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:34:58,099 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:34:58,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447110172] [2021-11-20 07:34:58,100 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:34:58,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312096755] [2021-11-20 07:34:58,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312096755] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:34:58,100 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:34:58,100 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-11-20 07:34:58,100 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152044317] [2021-11-20 07:34:58,100 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 07:34:58,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-20 07:34:58,101 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:34:58,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-20 07:34:58,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=405, Unknown=2, NotChecked=0, Total=462 [2021-11-20 07:34:58,102 INFO L87 Difference]: Start difference. First operand 229 states and 256 transitions. Second operand has 19 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 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) [2021-11-20 07:34:59,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:34:59,121 INFO L93 Difference]: Finished difference Result 283 states and 333 transitions. [2021-11-20 07:34:59,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-20 07:34:59,122 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 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 83 [2021-11-20 07:34:59,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:34:59,125 INFO L225 Difference]: With dead ends: 283 [2021-11-20 07:34:59,125 INFO L226 Difference]: Without dead ends: 283 [2021-11-20 07:34:59,126 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=93, Invalid=717, Unknown=2, NotChecked=0, Total=812 [2021-11-20 07:34:59,127 INFO L933 BasicCegarLoop]: 169 mSDtfsCounter, 4 mSDsluCounter, 1468 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 1637 SdHoareTripleChecker+Invalid, 1038 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 952 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:34:59,127 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 1637 Invalid, 1038 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 80 Invalid, 0 Unknown, 952 Unchecked, 0.1s Time] [2021-11-20 07:34:59,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-11-20 07:34:59,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 279. [2021-11-20 07:34:59,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 196 states have (on average 1.4285714285714286) internal successors, (280), 256 states have internal predecessors, (280), 17 states have call successors, (17), 3 states have call predecessors, (17), 6 states have return successors, (34), 19 states have call predecessors, (34), 17 states have call successors, (34) [2021-11-20 07:34:59,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 331 transitions. [2021-11-20 07:34:59,142 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 331 transitions. Word has length 83 [2021-11-20 07:34:59,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:34:59,142 INFO L470 AbstractCegarLoop]: Abstraction has 279 states and 331 transitions. [2021-11-20 07:34:59,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 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) [2021-11-20 07:34:59,143 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 331 transitions. [2021-11-20 07:34:59,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-20 07:34:59,144 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:34:59,145 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] [2021-11-20 07:34:59,181 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-20 07:34:59,364 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:34:59,364 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-11-20 07:34:59,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:34:59,365 INFO L85 PathProgramCache]: Analyzing trace with hash -1942816332, now seen corresponding path program 1 times [2021-11-20 07:34:59,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:34:59,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949466564] [2021-11-20 07:34:59,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:34:59,366 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:34:59,377 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:34:59,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1851112692] [2021-11-20 07:34:59,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:34:59,378 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:34:59,378 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:34:59,391 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:34:59,413 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-20 07:34:59,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:34:59,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 559 conjuncts, 69 conjunts are in the unsatisfiable core [2021-11-20 07:34:59,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:34:59,671 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 20 treesize of output 19 [2021-11-20 07:34:59,690 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 [2021-11-20 07:35:02,328 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-20 07:35:02,329 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 [2021-11-20 07:35:02,350 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 41 treesize of output 43 [2021-11-20 07:35:08,577 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-11-20 07:35:08,578 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 60 treesize of output 62 [2021-11-20 07:35:08,601 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-11-20 07:35:08,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 59 treesize of output 61 [2021-11-20 07:35:13,615 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 83 proven. 27 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-20 07:35:13,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:35:14,197 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:35:14,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949466564] [2021-11-20 07:35:14,197 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:35:14,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851112692] [2021-11-20 07:35:14,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851112692] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:35:14,198 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:35:14,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2021-11-20 07:35:14,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638723115] [2021-11-20 07:35:14,198 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 07:35:14,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-20 07:35:14,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:35:14,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-20 07:35:14,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=576, Unknown=0, NotChecked=0, Total=650 [2021-11-20 07:35:14,200 INFO L87 Difference]: Start difference. First operand 279 states and 331 transitions. Second operand has 23 states, 20 states have (on average 2.8) internal successors, (56), 20 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) [2021-11-20 07:35:14,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:35:14,790 INFO L93 Difference]: Finished difference Result 332 states and 416 transitions. [2021-11-20 07:35:14,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-20 07:35:14,791 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 20 states have (on average 2.8) internal successors, (56), 20 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 [2021-11-20 07:35:14,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:35:14,796 INFO L225 Difference]: With dead ends: 332 [2021-11-20 07:35:14,796 INFO L226 Difference]: Without dead ends: 332 [2021-11-20 07:35:14,797 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=93, Invalid=719, Unknown=0, NotChecked=0, Total=812 [2021-11-20 07:35:14,797 INFO L933 BasicCegarLoop]: 195 mSDtfsCounter, 2 mSDsluCounter, 1486 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1681 SdHoareTripleChecker+Invalid, 1328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1237 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:35:14,797 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1681 Invalid, 1328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 85 Invalid, 0 Unknown, 1237 Unchecked, 0.1s Time] [2021-11-20 07:35:14,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2021-11-20 07:35:14,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 280. [2021-11-20 07:35:14,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 197 states have (on average 1.4314720812182742) internal successors, (282), 257 states have internal predecessors, (282), 17 states have call successors, (17), 3 states have call predecessors, (17), 6 states have return successors, (34), 19 states have call predecessors, (34), 17 states have call successors, (34) [2021-11-20 07:35:14,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 333 transitions. [2021-11-20 07:35:14,816 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 333 transitions. Word has length 84 [2021-11-20 07:35:14,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:35:14,816 INFO L470 AbstractCegarLoop]: Abstraction has 280 states and 333 transitions. [2021-11-20 07:35:14,817 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 20 states have (on average 2.8) internal successors, (56), 20 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) [2021-11-20 07:35:14,817 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 333 transitions. [2021-11-20 07:35:14,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-20 07:35:14,818 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:35:14,819 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] [2021-11-20 07:35:14,851 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-20 07:35:15,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:35:15,035 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-11-20 07:35:15,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:35:15,036 INFO L85 PathProgramCache]: Analyzing trace with hash 401179046, now seen corresponding path program 2 times [2021-11-20 07:35:15,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:35:15,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568570536] [2021-11-20 07:35:15,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:35:15,037 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:35:15,046 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:35:15,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1345500757] [2021-11-20 07:35:15,047 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 07:35:15,047 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:35:15,048 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:35:15,052 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:35:15,053 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-20 07:35:15,220 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 07:35:15,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:35:15,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 559 conjuncts, 66 conjunts are in the unsatisfiable core [2021-11-20 07:35:15,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:35:15,327 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 [2021-11-20 07:35:15,334 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 20 treesize of output 19 [2021-11-20 07:35:19,312 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-11-20 07:35:19,313 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 57 treesize of output 59 [2021-11-20 07:35:19,338 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-20 07:35:19,338 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 56 treesize of output 60 [2021-11-20 07:35:21,205 INFO L354 Elim1Store]: treesize reduction 40, result has 21.6 percent of original size [2021-11-20 07:35:21,205 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 3 case distinctions, treesize of input 67 treesize of output 72 [2021-11-20 07:35:21,233 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-11-20 07:35:21,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 68 [2021-11-20 07:35:33,629 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 83 proven. 26 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-20 07:35:33,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:35:34,280 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:35:34,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568570536] [2021-11-20 07:35:34,283 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:35:34,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345500757] [2021-11-20 07:35:34,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345500757] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:35:34,284 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:35:34,284 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-11-20 07:35:34,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519254796] [2021-11-20 07:35:34,284 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 07:35:34,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-20 07:35:34,285 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:35:34,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-20 07:35:34,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=445, Unknown=2, NotChecked=0, Total=506 [2021-11-20 07:35:34,286 INFO L87 Difference]: Start difference. First operand 280 states and 333 transitions. Second operand has 20 states, 18 states have (on average 3.111111111111111) internal successors, (56), 18 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) [2021-11-20 07:35:35,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:35:35,574 INFO L93 Difference]: Finished difference Result 346 states and 422 transitions. [2021-11-20 07:35:35,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-20 07:35:35,576 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 3.111111111111111) internal successors, (56), 18 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 [2021-11-20 07:35:35,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:35:35,580 INFO L225 Difference]: With dead ends: 346 [2021-11-20 07:35:35,581 INFO L226 Difference]: Without dead ends: 346 [2021-11-20 07:35:35,581 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=100, Invalid=768, Unknown=2, NotChecked=0, Total=870 [2021-11-20 07:35:35,582 INFO L933 BasicCegarLoop]: 170 mSDtfsCounter, 3 mSDsluCounter, 1394 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 1564 SdHoareTripleChecker+Invalid, 1011 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 926 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:35:35,583 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 1564 Invalid, 1011 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 79 Invalid, 0 Unknown, 926 Unchecked, 0.1s Time] [2021-11-20 07:35:35,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2021-11-20 07:35:35,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 295. [2021-11-20 07:35:35,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 207 states have (on average 1.4106280193236715) internal successors, (292), 268 states have internal predecessors, (292), 21 states have call successors, (21), 3 states have call predecessors, (21), 7 states have return successors, (47), 23 states have call predecessors, (47), 21 states have call successors, (47) [2021-11-20 07:35:35,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 360 transitions. [2021-11-20 07:35:35,602 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 360 transitions. Word has length 84 [2021-11-20 07:35:35,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:35:35,602 INFO L470 AbstractCegarLoop]: Abstraction has 295 states and 360 transitions. [2021-11-20 07:35:35,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 3.111111111111111) internal successors, (56), 18 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) [2021-11-20 07:35:35,603 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 360 transitions. [2021-11-20 07:35:35,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-20 07:35:35,605 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:35:35,605 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] [2021-11-20 07:35:35,654 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-20 07:35:35,831 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-20 07:35:35,831 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-11-20 07:35:35,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:35:35,832 INFO L85 PathProgramCache]: Analyzing trace with hash 596515993, now seen corresponding path program 3 times [2021-11-20 07:35:35,832 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:35:35,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865149806] [2021-11-20 07:35:35,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:35:35,832 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:35:35,843 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:35:35,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1068362037] [2021-11-20 07:35:35,844 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 07:35:35,844 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:35:35,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:35:35,845 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:35:35,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-20 07:35:36,013 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-20 07:35:36,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:35:36,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-20 07:35:36,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:35:36,199 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2021-11-20 07:35:36,199 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:35:36,199 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:35:36,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865149806] [2021-11-20 07:35:36,199 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:35:36,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068362037] [2021-11-20 07:35:36,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068362037] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:35:36,200 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:35:36,200 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 07:35:36,200 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414198051] [2021-11-20 07:35:36,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:35:36,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 07:35:36,201 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:35:36,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 07:35:36,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:35:36,202 INFO L87 Difference]: Start difference. First operand 295 states and 360 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) [2021-11-20 07:35:36,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:35:36,300 INFO L93 Difference]: Finished difference Result 259 states and 293 transitions. [2021-11-20 07:35:36,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 07:35:36,301 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 [2021-11-20 07:35:36,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:35:36,305 INFO L225 Difference]: With dead ends: 259 [2021-11-20 07:35:36,306 INFO L226 Difference]: Without dead ends: 244 [2021-11-20 07:35:36,306 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 [2021-11-20 07:35:36,309 INFO L933 BasicCegarLoop]: 176 mSDtfsCounter, 12 mSDsluCounter, 502 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 678 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:35:36,310 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 678 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:35:36,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-11-20 07:35:36,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 232. [2021-11-20 07:35:36,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 156 states have (on average 1.4935897435897436) internal successors, (233), 215 states have internal predecessors, (233), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-11-20 07:35:36,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 259 transitions. [2021-11-20 07:35:36,330 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 259 transitions. Word has length 85 [2021-11-20 07:35:36,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:35:36,330 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 259 transitions. [2021-11-20 07:35:36,331 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) [2021-11-20 07:35:36,331 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 259 transitions. [2021-11-20 07:35:36,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-20 07:35:36,332 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:35:36,332 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] [2021-11-20 07:35:36,346 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-20 07:35:36,538 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-20 07:35:36,538 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-11-20 07:35:36,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:35:36,539 INFO L85 PathProgramCache]: Analyzing trace with hash -1074937127, now seen corresponding path program 4 times [2021-11-20 07:35:36,539 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:35:36,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820566197] [2021-11-20 07:35:36,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:35:36,540 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:35:36,549 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:35:36,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [82828119] [2021-11-20 07:35:36,549 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 07:35:36,550 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:35:36,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:35:36,554 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:35:36,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-20 07:35:36,815 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 07:35:36,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:35:36,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 589 conjuncts, 83 conjunts are in the unsatisfiable core [2021-11-20 07:35:36,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:35:36,915 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 14 treesize of output 13 [2021-11-20 07:35:36,936 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 [2021-11-20 07:35:48,759 INFO L354 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2021-11-20 07:35:48,759 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 48 treesize of output 50 [2021-11-20 07:35:52,955 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-20 07:35:52,955 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 [2021-11-20 07:35:59,316 WARN L227 SmtUtils]: Spent 5.13s on a formula simplification. DAG size of input: 50 DAG size of output: 38 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 07:36:03,040 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-11-20 07:36:03,040 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 67 treesize of output 65 [2021-11-20 07:36:03,181 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-11-20 07:36:03,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 68 [2021-11-20 07:36:12,609 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 100 proven. 49 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-20 07:36:12,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:36:13,847 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:36:13,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820566197] [2021-11-20 07:36:13,847 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:36:13,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82828119] [2021-11-20 07:36:13,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82828119] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:36:13,848 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:36:13,848 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2021-11-20 07:36:13,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775734837] [2021-11-20 07:36:13,848 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 07:36:13,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-20 07:36:13,849 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:36:13,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-20 07:36:13,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2021-11-20 07:36:13,850 INFO L87 Difference]: Start difference. First operand 232 states and 259 transitions. Second operand has 23 states, 20 states have (on average 3.05) internal successors, (61), 20 states have internal predecessors, (61), 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) [2021-11-20 07:36:23,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:36:23,372 INFO L93 Difference]: Finished difference Result 286 states and 336 transitions. [2021-11-20 07:36:23,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-20 07:36:23,373 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 20 states have (on average 3.05) internal successors, (61), 20 states have internal predecessors, (61), 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 89 [2021-11-20 07:36:23,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:36:23,375 INFO L225 Difference]: With dead ends: 286 [2021-11-20 07:36:23,375 INFO L226 Difference]: Without dead ends: 286 [2021-11-20 07:36:23,376 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 34.1s TimeCoverageRelationStatistics Valid=109, Invalid=947, Unknown=0, NotChecked=0, Total=1056 [2021-11-20 07:36:23,376 INFO L933 BasicCegarLoop]: 168 mSDtfsCounter, 3 mSDsluCounter, 1263 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 1431 SdHoareTripleChecker+Invalid, 1059 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 973 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:36:23,377 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 1431 Invalid, 1059 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 80 Invalid, 0 Unknown, 973 Unchecked, 0.1s Time] [2021-11-20 07:36:23,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-11-20 07:36:23,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 270. [2021-11-20 07:36:23,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 189 states have (on average 1.433862433862434) internal successors, (271), 247 states have internal predecessors, (271), 17 states have call successors, (17), 3 states have call predecessors, (17), 4 states have return successors, (22), 19 states have call predecessors, (22), 17 states have call successors, (22) [2021-11-20 07:36:23,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 310 transitions. [2021-11-20 07:36:23,390 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 310 transitions. Word has length 89 [2021-11-20 07:36:23,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:36:23,390 INFO L470 AbstractCegarLoop]: Abstraction has 270 states and 310 transitions. [2021-11-20 07:36:23,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 20 states have (on average 3.05) internal successors, (61), 20 states have internal predecessors, (61), 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) [2021-11-20 07:36:23,391 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 310 transitions. [2021-11-20 07:36:23,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-20 07:36:23,392 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:36:23,392 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] [2021-11-20 07:36:23,441 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-20 07:36:23,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-20 07:36:23,607 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-11-20 07:36:23,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:36:23,608 INFO L85 PathProgramCache]: Analyzing trace with hash 206067916, now seen corresponding path program 5 times [2021-11-20 07:36:23,608 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:36:23,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411655528] [2021-11-20 07:36:23,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:36:23,608 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:36:23,616 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:36:23,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1809148768] [2021-11-20 07:36:23,617 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-20 07:36:23,617 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:36:23,617 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:36:23,627 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:36:23,628 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-20 07:36:23,736 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 07:36:23,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:36:23,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-20 07:36:23,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:36:23,958 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 111 proven. 1 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-20 07:36:23,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:36:24,510 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 11 proven. 47 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2021-11-20 07:36:24,511 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:36:24,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411655528] [2021-11-20 07:36:24,511 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:36:24,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809148768] [2021-11-20 07:36:24,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809148768] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:36:24,511 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:36:24,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-11-20 07:36:24,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310520754] [2021-11-20 07:36:24,512 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:36:24,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 07:36:24,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:36:24,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 07:36:24,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-11-20 07:36:24,514 INFO L87 Difference]: Start difference. First operand 270 states and 310 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) [2021-11-20 07:36:25,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:36:25,015 INFO L93 Difference]: Finished difference Result 264 states and 293 transitions. [2021-11-20 07:36:25,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-20 07:36:25,016 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 [2021-11-20 07:36:25,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:36:25,019 INFO L225 Difference]: With dead ends: 264 [2021-11-20 07:36:25,019 INFO L226 Difference]: Without dead ends: 239 [2021-11-20 07:36:25,019 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=105, Invalid=167, Unknown=0, NotChecked=0, Total=272 [2021-11-20 07:36:25,020 INFO L933 BasicCegarLoop]: 177 mSDtfsCounter, 49 mSDsluCounter, 842 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 1019 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 07:36:25,021 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 1019 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 07:36:25,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2021-11-20 07:36:25,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 239. [2021-11-20 07:36:25,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 163 states have (on average 1.4723926380368098) internal successors, (240), 222 states have internal predecessors, (240), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-11-20 07:36:25,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 266 transitions. [2021-11-20 07:36:25,031 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 266 transitions. Word has length 90 [2021-11-20 07:36:25,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:36:25,032 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 266 transitions. [2021-11-20 07:36:25,032 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) [2021-11-20 07:36:25,032 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 266 transitions. [2021-11-20 07:36:25,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-11-20 07:36:25,033 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:36:25,034 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] [2021-11-20 07:36:25,083 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-20 07:36:25,257 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-20 07:36:25,257 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-11-20 07:36:25,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:36:25,257 INFO L85 PathProgramCache]: Analyzing trace with hash 1476348313, now seen corresponding path program 6 times [2021-11-20 07:36:25,258 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:36:25,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470304314] [2021-11-20 07:36:25,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:36:25,258 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:36:25,267 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:36:25,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1515104719] [2021-11-20 07:36:25,268 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-20 07:36:25,268 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:36:25,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:36:25,269 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:36:25,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-20 07:36:26,301 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-11-20 07:36:26,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:36:26,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-20 07:36:26,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:36:26,582 INFO L134 CoverageAnalysis]: Checked inductivity of 498 backedges. 110 proven. 3 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2021-11-20 07:36:26,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:36:27,047 INFO L134 CoverageAnalysis]: Checked inductivity of 498 backedges. 110 proven. 3 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2021-11-20 07:36:27,047 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:36:27,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470304314] [2021-11-20 07:36:27,048 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:36:27,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515104719] [2021-11-20 07:36:27,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515104719] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:36:27,048 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:36:27,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-11-20 07:36:27,048 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672296260] [2021-11-20 07:36:27,048 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:36:27,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-20 07:36:27,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:36:27,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-20 07:36:27,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-11-20 07:36:27,050 INFO L87 Difference]: Start difference. First operand 239 states and 266 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) [2021-11-20 07:36:27,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:36:27,527 INFO L93 Difference]: Finished difference Result 253 states and 282 transitions. [2021-11-20 07:36:27,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-20 07:36:27,529 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 [2021-11-20 07:36:27,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:36:27,531 INFO L225 Difference]: With dead ends: 253 [2021-11-20 07:36:27,531 INFO L226 Difference]: Without dead ends: 243 [2021-11-20 07:36:27,532 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=155, Invalid=265, Unknown=0, NotChecked=0, Total=420 [2021-11-20 07:36:27,533 INFO L933 BasicCegarLoop]: 179 mSDtfsCounter, 70 mSDsluCounter, 864 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 1043 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:36:27,533 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 1043 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 07:36:27,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-11-20 07:36:27,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 243. [2021-11-20 07:36:27,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 167 states have (on average 1.4610778443113772) internal successors, (244), 226 states have internal predecessors, (244), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-11-20 07:36:27,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 270 transitions. [2021-11-20 07:36:27,544 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 270 transitions. Word has length 105 [2021-11-20 07:36:27,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:36:27,545 INFO L470 AbstractCegarLoop]: Abstraction has 243 states and 270 transitions. [2021-11-20 07:36:27,545 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) [2021-11-20 07:36:27,545 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 270 transitions. [2021-11-20 07:36:27,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-20 07:36:27,546 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:36:27,546 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] [2021-11-20 07:36:27,591 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-20 07:36:27,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:36:27,771 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-11-20 07:36:27,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:36:27,772 INFO L85 PathProgramCache]: Analyzing trace with hash -1993448487, now seen corresponding path program 7 times [2021-11-20 07:36:27,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:36:27,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280422261] [2021-11-20 07:36:27,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:36:27,772 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:36:27,783 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:36:27,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [891647320] [2021-11-20 07:36:27,784 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-20 07:36:27,784 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:36:27,785 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:36:27,786 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:36:27,795 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-20 07:36:29,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:36:29,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 709 conjuncts, 73 conjunts are in the unsatisfiable core [2021-11-20 07:36:29,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:36:29,538 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 12 treesize of output 11 [2021-11-20 07:36:31,365 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-20 07:36:31,366 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 [2021-11-20 07:36:31,376 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 26 treesize of output 26 [2021-11-20 07:36:32,099 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-11-20 07:36:32,099 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 45 treesize of output 45 [2021-11-20 07:36:32,218 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-11-20 07:36:32,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 46 [2021-11-20 07:36:35,096 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 326 proven. 116 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2021-11-20 07:36:35,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:36:35,507 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:36:35,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280422261] [2021-11-20 07:36:35,508 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:36:35,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891647320] [2021-11-20 07:36:35,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891647320] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:36:35,508 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:36:35,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-11-20 07:36:35,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596195119] [2021-11-20 07:36:35,508 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 07:36:35,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-20 07:36:35,509 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:36:35,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-20 07:36:35,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-11-20 07:36:35,510 INFO L87 Difference]: Start difference. First operand 243 states and 270 transitions. Second operand has 19 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 16 states have internal predecessors, (59), 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) [2021-11-20 07:36:39,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:36:39,331 INFO L93 Difference]: Finished difference Result 253 states and 282 transitions. [2021-11-20 07:36:39,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-20 07:36:39,334 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 16 states have internal predecessors, (59), 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 109 [2021-11-20 07:36:39,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:36:39,337 INFO L225 Difference]: With dead ends: 253 [2021-11-20 07:36:39,337 INFO L226 Difference]: Without dead ends: 253 [2021-11-20 07:36:39,337 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2021-11-20 07:36:39,338 INFO L933 BasicCegarLoop]: 164 mSDtfsCounter, 1 mSDsluCounter, 894 mSDsCounter, 0 mSdLazyCounter, 459 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 1058 SdHoareTripleChecker+Invalid, 724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 258 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-20 07:36:39,339 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 1058 Invalid, 724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 459 Invalid, 0 Unknown, 258 Unchecked, 1.5s Time] [2021-11-20 07:36:39,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2021-11-20 07:36:39,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 251. [2021-11-20 07:36:39,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 175 states have (on average 1.4514285714285715) internal successors, (254), 234 states have internal predecessors, (254), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-11-20 07:36:39,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 280 transitions. [2021-11-20 07:36:39,350 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 280 transitions. Word has length 109 [2021-11-20 07:36:39,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:36:39,351 INFO L470 AbstractCegarLoop]: Abstraction has 251 states and 280 transitions. [2021-11-20 07:36:39,351 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 16 states have internal predecessors, (59), 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) [2021-11-20 07:36:39,352 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 280 transitions. [2021-11-20 07:36:39,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-11-20 07:36:39,353 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:36:39,353 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] [2021-11-20 07:36:39,409 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-20 07:36:39,569 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:36:39,569 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-11-20 07:36:39,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:36:39,570 INFO L85 PathProgramCache]: Analyzing trace with hash 1499809857, now seen corresponding path program 1 times [2021-11-20 07:36:39,570 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:36:39,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813180146] [2021-11-20 07:36:39,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:36:39,570 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:36:39,595 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:36:39,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [842815559] [2021-11-20 07:36:39,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:36:39,596 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:36:39,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:36:39,597 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:36:39,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-20 07:36:39,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:36:39,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 729 conjuncts, 47 conjunts are in the unsatisfiable core [2021-11-20 07:36:39,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:36:40,162 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-20 07:36:40,162 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 [2021-11-20 07:36:40,338 INFO L354 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2021-11-20 07:36:40,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 26 treesize of output 37 [2021-11-20 07:36:42,616 INFO L354 Elim1Store]: treesize reduction 66, result has 19.5 percent of original size [2021-11-20 07:36:42,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 42 [2021-11-20 07:36:42,812 INFO L354 Elim1Store]: treesize reduction 66, result has 19.5 percent of original size [2021-11-20 07:36:42,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 42 [2021-11-20 07:36:44,213 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 178 proven. 286 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2021-11-20 07:36:44,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:36:44,737 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:36:44,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813180146] [2021-11-20 07:36:44,737 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:36:44,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842815559] [2021-11-20 07:36:44,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842815559] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:36:44,738 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:36:44,738 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-11-20 07:36:44,738 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36133178] [2021-11-20 07:36:44,738 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 07:36:44,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-20 07:36:44,739 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:36:44,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-20 07:36:44,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=289, Unknown=1, NotChecked=0, Total=342 [2021-11-20 07:36:44,740 INFO L87 Difference]: Start difference. First operand 251 states and 280 transitions. Second operand has 16 states, 14 states have (on average 4.642857142857143) internal successors, (65), 14 states have internal predecessors, (65), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-20 07:36:45,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:36:45,173 INFO L93 Difference]: Finished difference Result 361 states and 415 transitions. [2021-11-20 07:36:45,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-20 07:36:45,174 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 4.642857142857143) internal successors, (65), 14 states have internal predecessors, (65), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 115 [2021-11-20 07:36:45,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:36:45,181 INFO L225 Difference]: With dead ends: 361 [2021-11-20 07:36:45,181 INFO L226 Difference]: Without dead ends: 361 [2021-11-20 07:36:45,181 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 142 SyntacticMatches, 7 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=95, Invalid=504, Unknown=1, NotChecked=0, Total=600 [2021-11-20 07:36:45,183 INFO L933 BasicCegarLoop]: 147 mSDtfsCounter, 161 mSDsluCounter, 1242 mSDsCounter, 0 mSdLazyCounter, 480 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 1389 SdHoareTripleChecker+Invalid, 701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 212 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 07:36:45,184 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 1389 Invalid, 701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 480 Invalid, 0 Unknown, 212 Unchecked, 0.3s Time] [2021-11-20 07:36:45,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2021-11-20 07:36:45,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 327. [2021-11-20 07:36:45,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 240 states have (on average 1.3958333333333333) internal successors, (335), 299 states have internal predecessors, (335), 24 states have call successors, (24), 3 states have call predecessors, (24), 3 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2021-11-20 07:36:45,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 383 transitions. [2021-11-20 07:36:45,202 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 383 transitions. Word has length 115 [2021-11-20 07:36:45,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:36:45,203 INFO L470 AbstractCegarLoop]: Abstraction has 327 states and 383 transitions. [2021-11-20 07:36:45,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 4.642857142857143) internal successors, (65), 14 states have internal predecessors, (65), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-20 07:36:45,203 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 383 transitions. [2021-11-20 07:36:45,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-11-20 07:36:45,204 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:36:45,205 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] [2021-11-20 07:36:45,248 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-20 07:36:45,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-11-20 07:36:45,422 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-11-20 07:36:45,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:36:45,423 INFO L85 PathProgramCache]: Analyzing trace with hash 1499809858, now seen corresponding path program 1 times [2021-11-20 07:36:45,423 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:36:45,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942282478] [2021-11-20 07:36:45,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:36:45,423 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:36:45,434 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:36:45,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2136232867] [2021-11-20 07:36:45,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:36:45,434 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:36:45,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:36:45,444 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:36:45,452 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-20 07:36:48,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:36:48,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 729 conjuncts, 153 conjunts are in the unsatisfiable core [2021-11-20 07:36:48,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:36:48,861 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 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-20 07:36:48,913 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 12 treesize of output 11 [2021-11-20 07:36:50,970 INFO L354 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2021-11-20 07:36:50,970 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 26 treesize of output 30 [2021-11-20 07:36:51,230 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-20 07:36:51,231 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 [2021-11-20 07:36:52,925 INFO L354 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2021-11-20 07:36:52,926 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 26 treesize of output 30 [2021-11-20 07:36:53,219 INFO L354 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2021-11-20 07:36:53,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 26 treesize of output 37 [2021-11-20 07:36:54,461 INFO L354 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2021-11-20 07:36:54,461 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 26 treesize of output 30 [2021-11-20 07:36:54,787 INFO L354 Elim1Store]: treesize reduction 78, result has 26.4 percent of original size [2021-11-20 07:36:54,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 39 treesize of output 57 [2021-11-20 07:36:57,867 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-11-20 07:36:57,868 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 75 treesize of output 75 [2021-11-20 07:36:58,006 INFO L354 Elim1Store]: treesize reduction 64, result has 21.0 percent of original size [2021-11-20 07:36:58,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 74 treesize of output 80 [2021-11-20 07:36:58,893 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 208 proven. 303 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-11-20 07:36:58,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:36:59,357 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:36:59,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942282478] [2021-11-20 07:36:59,357 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:36:59,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136232867] [2021-11-20 07:36:59,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136232867] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:36:59,359 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:36:59,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2021-11-20 07:36:59,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322164630] [2021-11-20 07:36:59,360 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 07:36:59,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-20 07:36:59,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:36:59,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-20 07:36:59,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1115, Unknown=1, NotChecked=0, Total=1260 [2021-11-20 07:36:59,362 INFO L87 Difference]: Start difference. First operand 327 states and 383 transitions. Second operand has 34 states, 29 states have (on average 2.6551724137931036) internal successors, (77), 29 states have internal predecessors, (77), 5 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-20 07:37:04,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:37:04,917 INFO L93 Difference]: Finished difference Result 333 states and 390 transitions. [2021-11-20 07:37:04,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-20 07:37:04,917 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 29 states have (on average 2.6551724137931036) internal successors, (77), 29 states have internal predecessors, (77), 5 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 115 [2021-11-20 07:37:04,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:37:04,920 INFO L225 Difference]: With dead ends: 333 [2021-11-20 07:37:04,921 INFO L226 Difference]: Without dead ends: 333 [2021-11-20 07:37:04,922 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=197, Invalid=1608, Unknown=1, NotChecked=0, Total=1806 [2021-11-20 07:37:04,922 INFO L933 BasicCegarLoop]: 157 mSDtfsCounter, 2 mSDsluCounter, 1374 mSDsCounter, 0 mSdLazyCounter, 442 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1531 SdHoareTripleChecker+Invalid, 1210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 761 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-11-20 07:37:04,923 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1531 Invalid, 1210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 442 Invalid, 0 Unknown, 761 Unchecked, 1.8s Time] [2021-11-20 07:37:04,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2021-11-20 07:37:04,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 331. [2021-11-20 07:37:04,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 244 states have (on average 1.3934426229508197) internal successors, (340), 303 states have internal predecessors, (340), 24 states have call successors, (24), 3 states have call predecessors, (24), 3 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2021-11-20 07:37:04,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 388 transitions. [2021-11-20 07:37:04,936 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 388 transitions. Word has length 115 [2021-11-20 07:37:04,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:37:04,937 INFO L470 AbstractCegarLoop]: Abstraction has 331 states and 388 transitions. [2021-11-20 07:37:04,937 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 29 states have (on average 2.6551724137931036) internal successors, (77), 29 states have internal predecessors, (77), 5 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-20 07:37:04,938 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 388 transitions. [2021-11-20 07:37:04,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-20 07:37:04,938 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:37:04,939 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] [2021-11-20 07:37:04,996 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-20 07:37:05,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:37:05,167 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-11-20 07:37:05,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:37:05,168 INFO L85 PathProgramCache]: Analyzing trace with hash -750534634, now seen corresponding path program 1 times [2021-11-20 07:37:05,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:37:05,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447060495] [2021-11-20 07:37:05,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:37:05,168 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:37:05,188 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:37:05,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1946473690] [2021-11-20 07:37:05,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:37:05,189 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:37:05,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:37:05,190 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:37:05,210 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-20 07:37:05,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:37:05,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 737 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-20 07:37:05,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:37:05,654 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2021-11-20 07:37:05,654 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:37:05,654 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:37:05,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447060495] [2021-11-20 07:37:05,655 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:37:05,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946473690] [2021-11-20 07:37:05,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1946473690] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:37:05,655 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:37:05,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 07:37:05,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281616188] [2021-11-20 07:37:05,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:37:05,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 07:37:05,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:37:05,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 07:37:05,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 07:37:05,657 INFO L87 Difference]: Start difference. First operand 331 states and 388 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) [2021-11-20 07:37:05,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:37:05,872 INFO L93 Difference]: Finished difference Result 364 states and 423 transitions. [2021-11-20 07:37:05,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 07:37:05,873 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 [2021-11-20 07:37:05,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:37:05,876 INFO L225 Difference]: With dead ends: 364 [2021-11-20 07:37:05,876 INFO L226 Difference]: Without dead ends: 364 [2021-11-20 07:37:05,876 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 [2021-11-20 07:37:05,878 INFO L933 BasicCegarLoop]: 157 mSDtfsCounter, 245 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:37:05,878 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [246 Valid, 269 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 07:37:05,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2021-11-20 07:37:05,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 329. [2021-11-20 07:37:05,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 244 states have (on average 1.3811475409836065) internal successors, (337), 301 states have internal predecessors, (337), 24 states have call successors, (24), 3 states have call predecessors, (24), 3 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2021-11-20 07:37:05,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 385 transitions. [2021-11-20 07:37:05,892 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 385 transitions. Word has length 116 [2021-11-20 07:37:05,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:37:05,893 INFO L470 AbstractCegarLoop]: Abstraction has 329 states and 385 transitions. [2021-11-20 07:37:05,893 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) [2021-11-20 07:37:05,893 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 385 transitions. [2021-11-20 07:37:05,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-20 07:37:05,894 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:37:05,894 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] [2021-11-20 07:37:05,939 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-20 07:37:06,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:37:06,111 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-11-20 07:37:06,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:37:06,112 INFO L85 PathProgramCache]: Analyzing trace with hash -750534633, now seen corresponding path program 1 times [2021-11-20 07:37:06,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:37:06,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73142206] [2021-11-20 07:37:06,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:37:06,112 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:37:06,121 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:37:06,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1936578647] [2021-11-20 07:37:06,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:37:06,122 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:37:06,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:37:06,123 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:37:06,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-20 07:37:06,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:37:06,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 737 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-20 07:37:06,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:37:06,747 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 64 proven. 106 refuted. 0 times theorem prover too weak. 446 trivial. 0 not checked. [2021-11-20 07:37:06,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:37:06,853 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 07:37:06,854 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 [2021-11-20 07:37:07,426 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 64 proven. 106 refuted. 0 times theorem prover too weak. 446 trivial. 0 not checked. [2021-11-20 07:37:07,426 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:37:07,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73142206] [2021-11-20 07:37:07,426 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:37:07,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936578647] [2021-11-20 07:37:07,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936578647] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:37:07,427 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:37:07,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-11-20 07:37:07,428 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041270392] [2021-11-20 07:37:07,428 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:37:07,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-20 07:37:07,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:37:07,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-20 07:37:07,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-11-20 07:37:07,430 INFO L87 Difference]: Start difference. First operand 329 states and 385 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) [2021-11-20 07:37:07,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:37:07,850 INFO L93 Difference]: Finished difference Result 337 states and 396 transitions. [2021-11-20 07:37:07,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-20 07:37:07,851 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 [2021-11-20 07:37:07,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:37:07,854 INFO L225 Difference]: With dead ends: 337 [2021-11-20 07:37:07,854 INFO L226 Difference]: Without dead ends: 337 [2021-11-20 07:37:07,855 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-11-20 07:37:07,855 INFO L933 BasicCegarLoop]: 145 mSDtfsCounter, 587 mSDsluCounter, 1072 mSDsCounter, 0 mSdLazyCounter, 427 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 588 SdHoareTripleChecker+Valid, 1217 SdHoareTripleChecker+Invalid, 442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 07:37:07,856 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [588 Valid, 1217 Invalid, 442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 427 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 07:37:07,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2021-11-20 07:37:07,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 328. [2021-11-20 07:37:07,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 244 states have (on average 1.3770491803278688) internal successors, (336), 300 states have internal predecessors, (336), 24 states have call successors, (24), 3 states have call predecessors, (24), 3 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2021-11-20 07:37:07,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 384 transitions. [2021-11-20 07:37:07,870 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 384 transitions. Word has length 116 [2021-11-20 07:37:07,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:37:07,870 INFO L470 AbstractCegarLoop]: Abstraction has 328 states and 384 transitions. [2021-11-20 07:37:07,871 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) [2021-11-20 07:37:07,871 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 384 transitions. [2021-11-20 07:37:07,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-20 07:37:07,872 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:37:07,872 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] [2021-11-20 07:37:07,927 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-20 07:37:08,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-11-20 07:37:08,087 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-11-20 07:37:08,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:37:08,088 INFO L85 PathProgramCache]: Analyzing trace with hash 290724311, now seen corresponding path program 1 times [2021-11-20 07:37:08,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:37:08,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920481544] [2021-11-20 07:37:08,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:37:08,088 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:37:08,106 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:37:08,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [359189646] [2021-11-20 07:37:08,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:37:08,107 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:37:08,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:37:08,108 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:37:08,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-20 07:37:08,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:37:08,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 745 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 07:37:08,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:37:08,497 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2021-11-20 07:37:08,497 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:37:08,498 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:37:08,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920481544] [2021-11-20 07:37:08,498 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:37:08,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359189646] [2021-11-20 07:37:08,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359189646] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:37:08,498 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:37:08,498 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 07:37:08,498 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037542536] [2021-11-20 07:37:08,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:37:08,499 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 07:37:08,499 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:37:08,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 07:37:08,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:37:08,500 INFO L87 Difference]: Start difference. First operand 328 states and 384 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) [2021-11-20 07:37:08,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:37:08,673 INFO L93 Difference]: Finished difference Result 357 states and 415 transitions. [2021-11-20 07:37:08,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:37:08,673 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 [2021-11-20 07:37:08,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:37:08,677 INFO L225 Difference]: With dead ends: 357 [2021-11-20 07:37:08,677 INFO L226 Difference]: Without dead ends: 357 [2021-11-20 07:37:08,677 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 [2021-11-20 07:37:08,678 INFO L933 BasicCegarLoop]: 159 mSDtfsCounter, 65 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:37:08,678 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 254 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 07:37:08,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2021-11-20 07:37:08,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 327. [2021-11-20 07:37:08,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 244 states have (on average 1.3729508196721312) internal successors, (335), 299 states have internal predecessors, (335), 24 states have call successors, (24), 3 states have call predecessors, (24), 3 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2021-11-20 07:37:08,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 383 transitions. [2021-11-20 07:37:08,692 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 383 transitions. Word has length 118 [2021-11-20 07:37:08,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:37:08,693 INFO L470 AbstractCegarLoop]: Abstraction has 327 states and 383 transitions. [2021-11-20 07:37:08,693 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) [2021-11-20 07:37:08,693 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 383 transitions. [2021-11-20 07:37:08,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-20 07:37:08,694 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:37:08,695 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] [2021-11-20 07:37:08,745 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-20 07:37:08,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-20 07:37:08,915 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-11-20 07:37:08,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:37:08,916 INFO L85 PathProgramCache]: Analyzing trace with hash 290724312, now seen corresponding path program 1 times [2021-11-20 07:37:08,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:37:08,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802593150] [2021-11-20 07:37:08,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:37:08,916 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:37:08,925 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:37:08,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1394057858] [2021-11-20 07:37:08,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:37:08,925 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:37:08,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:37:08,926 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:37:08,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-20 07:37:09,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:37:09,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 745 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 07:37:09,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:37:09,323 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2021-11-20 07:37:09,323 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:37:09,323 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:37:09,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802593150] [2021-11-20 07:37:09,324 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:37:09,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394057858] [2021-11-20 07:37:09,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394057858] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:37:09,324 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:37:09,324 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 07:37:09,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034862180] [2021-11-20 07:37:09,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:37:09,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 07:37:09,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:37:09,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 07:37:09,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:37:09,327 INFO L87 Difference]: Start difference. First operand 327 states and 383 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) [2021-11-20 07:37:09,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:37:09,554 INFO L93 Difference]: Finished difference Result 330 states and 388 transitions. [2021-11-20 07:37:09,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:37:09,555 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 [2021-11-20 07:37:09,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:37:09,557 INFO L225 Difference]: With dead ends: 330 [2021-11-20 07:37:09,557 INFO L226 Difference]: Without dead ends: 330 [2021-11-20 07:37:09,557 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 [2021-11-20 07:37:09,557 INFO L933 BasicCegarLoop]: 153 mSDtfsCounter, 121 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:37:09,558 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 194 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 07:37:09,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2021-11-20 07:37:09,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 326. [2021-11-20 07:37:09,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 244 states have (on average 1.3688524590163935) internal successors, (334), 298 states have internal predecessors, (334), 24 states have call successors, (24), 3 states have call predecessors, (24), 3 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2021-11-20 07:37:09,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 382 transitions. [2021-11-20 07:37:09,570 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 382 transitions. Word has length 118 [2021-11-20 07:37:09,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:37:09,571 INFO L470 AbstractCegarLoop]: Abstraction has 326 states and 382 transitions. [2021-11-20 07:37:09,571 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) [2021-11-20 07:37:09,572 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 382 transitions. [2021-11-20 07:37:09,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-20 07:37:09,573 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:37:09,573 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] [2021-11-20 07:37:09,621 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-20 07:37:09,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-11-20 07:37:09,799 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-11-20 07:37:09,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:37:09,800 INFO L85 PathProgramCache]: Analyzing trace with hash -1282214337, now seen corresponding path program 1 times [2021-11-20 07:37:09,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:37:09,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634652609] [2021-11-20 07:37:09,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:37:09,800 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:37:09,809 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:37:09,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [630994005] [2021-11-20 07:37:09,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:37:09,809 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:37:09,810 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:37:09,811 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:37:09,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-20 07:37:10,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:37:10,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 757 conjuncts, 56 conjunts are in the unsatisfiable core [2021-11-20 07:37:10,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:37:10,259 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-20 07:37:10,259 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 [2021-11-20 07:37:10,470 INFO L354 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2021-11-20 07:37:10,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 26 treesize of output 37 [2021-11-20 07:37:10,743 INFO L354 Elim1Store]: treesize reduction 78, result has 26.4 percent of original size [2021-11-20 07:37:10,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 39 treesize of output 57 [2021-11-20 07:37:13,154 INFO L354 Elim1Store]: treesize reduction 104, result has 16.8 percent of original size [2021-11-20 07:37:13,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 51 treesize of output 62 [2021-11-20 07:37:13,453 INFO L354 Elim1Store]: treesize reduction 104, result has 16.8 percent of original size [2021-11-20 07:37:13,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 51 treesize of output 62 [2021-11-20 07:37:15,099 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 6 proven. 393 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2021-11-20 07:37:15,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:37:15,633 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:37:15,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634652609] [2021-11-20 07:37:15,633 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:37:15,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630994005] [2021-11-20 07:37:15,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [630994005] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:37:15,633 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:37:15,633 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-11-20 07:37:15,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901349550] [2021-11-20 07:37:15,634 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 07:37:15,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-20 07:37:15,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:37:15,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-20 07:37:15,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=354, Unknown=1, NotChecked=0, Total=420 [2021-11-20 07:37:15,635 INFO L87 Difference]: Start difference. First operand 326 states and 382 transitions. Second operand has 18 states, 16 states have (on average 4.0625) internal successors, (65), 16 states have internal predecessors, (65), 5 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-20 07:37:16,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:37:16,186 INFO L93 Difference]: Finished difference Result 527 states and 636 transitions. [2021-11-20 07:37:16,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-20 07:37:16,195 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 4.0625) internal successors, (65), 16 states have internal predecessors, (65), 5 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) Word has length 122 [2021-11-20 07:37:16,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:37:16,200 INFO L225 Difference]: With dead ends: 527 [2021-11-20 07:37:16,200 INFO L226 Difference]: Without dead ends: 527 [2021-11-20 07:37:16,201 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 154 SyntacticMatches, 7 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=134, Invalid=621, Unknown=1, NotChecked=0, Total=756 [2021-11-20 07:37:16,202 INFO L933 BasicCegarLoop]: 144 mSDtfsCounter, 202 mSDsluCounter, 1203 mSDsCounter, 0 mSdLazyCounter, 607 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 1347 SdHoareTripleChecker+Invalid, 827 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 607 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 207 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 07:37:16,202 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 1347 Invalid, 827 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 607 Invalid, 0 Unknown, 207 Unchecked, 0.4s Time] [2021-11-20 07:37:16,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2021-11-20 07:37:16,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 492. [2021-11-20 07:37:16,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 492 states, 387 states have (on average 1.3204134366925064) internal successors, (511), 441 states have internal predecessors, (511), 47 states have call successors, (47), 3 states have call predecessors, (47), 3 states have return successors, (47), 47 states have call predecessors, (47), 47 states have call successors, (47) [2021-11-20 07:37:16,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 492 states to 492 states and 605 transitions. [2021-11-20 07:37:16,220 INFO L78 Accepts]: Start accepts. Automaton has 492 states and 605 transitions. Word has length 122 [2021-11-20 07:37:16,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:37:16,221 INFO L470 AbstractCegarLoop]: Abstraction has 492 states and 605 transitions. [2021-11-20 07:37:16,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 4.0625) internal successors, (65), 16 states have internal predecessors, (65), 5 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-20 07:37:16,221 INFO L276 IsEmpty]: Start isEmpty. Operand 492 states and 605 transitions. [2021-11-20 07:37:16,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-20 07:37:16,223 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:37:16,223 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] [2021-11-20 07:37:16,271 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-20 07:37:16,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-20 07:37:16,439 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-11-20 07:37:16,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:37:16,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1282214336, now seen corresponding path program 1 times [2021-11-20 07:37:16,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:37:16,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318965869] [2021-11-20 07:37:16,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:37:16,440 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:37:16,449 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:37:16,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [832082066] [2021-11-20 07:37:16,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:37:16,449 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:37:16,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:37:16,451 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:37:16,454 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-20 07:37:17,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:37:17,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 757 conjuncts, 163 conjunts are in the unsatisfiable core [2021-11-20 07:37:17,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:37:17,613 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 [2021-11-20 07:37:17,619 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 12 treesize of output 11 [2021-11-20 07:37:19,622 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-11-20 07:37:19,623 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 42 treesize of output 42 [2021-11-20 07:37:19,719 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-20 07:37:19,719 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 41 treesize of output 45 [2021-11-20 07:37:20,678 INFO L354 Elim1Store]: treesize reduction 40, result has 21.6 percent of original size [2021-11-20 07:37:20,678 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 3 case distinctions, treesize of input 58 treesize of output 61 [2021-11-20 07:37:20,710 INFO L354 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2021-11-20 07:37:20,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 44 [2021-11-20 07:37:20,795 INFO L354 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2021-11-20 07:37:20,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 44 [2021-11-20 07:37:22,516 INFO L354 Elim1Store]: treesize reduction 40, result has 21.6 percent of original size [2021-11-20 07:37:22,517 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 3 case distinctions, treesize of input 71 treesize of output 74 [2021-11-20 07:37:22,600 INFO L354 Elim1Store]: treesize reduction 78, result has 26.4 percent of original size [2021-11-20 07:37:22,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 46 treesize of output 64 [2021-11-20 07:37:22,756 INFO L354 Elim1Store]: treesize reduction 78, result has 26.4 percent of original size [2021-11-20 07:37:22,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 46 treesize of output 64 [2021-11-20 07:37:24,204 INFO L354 Elim1Store]: treesize reduction 40, result has 21.6 percent of original size [2021-11-20 07:37:24,204 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 3 case distinctions, treesize of input 88 treesize of output 91 [2021-11-20 07:37:24,301 INFO L354 Elim1Store]: treesize reduction 120, result has 23.6 percent of original size [2021-11-20 07:37:24,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 63 treesize of output 88 [2021-11-20 07:37:24,520 INFO L354 Elim1Store]: treesize reduction 120, result has 23.6 percent of original size [2021-11-20 07:37:24,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 63 treesize of output 88 [2021-11-20 07:37:26,030 INFO L354 Elim1Store]: treesize reduction 40, result has 21.6 percent of original size [2021-11-20 07:37:26,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 103 treesize of output 106 [2021-11-20 07:37:26,187 INFO L354 Elim1Store]: treesize reduction 100, result has 17.4 percent of original size [2021-11-20 07:37:26,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 102 treesize of output 110 [2021-11-20 07:37:47,886 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 133 proven. 374 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-20 07:37:47,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:37:48,576 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:37:48,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318965869] [2021-11-20 07:37:48,577 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:37:48,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832082066] [2021-11-20 07:37:48,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832082066] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:37:48,577 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:37:48,577 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2021-11-20 07:37:48,577 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858958527] [2021-11-20 07:37:48,577 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 07:37:48,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-20 07:37:48,578 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:37:48,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-20 07:37:48,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=1164, Unknown=8, NotChecked=0, Total=1332 [2021-11-20 07:37:48,579 INFO L87 Difference]: Start difference. First operand 492 states and 605 transitions. Second operand has 35 states, 31 states have (on average 2.6451612903225805) 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) [2021-11-20 07:37:54,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:37:54,688 INFO L93 Difference]: Finished difference Result 531 states and 648 transitions. [2021-11-20 07:37:54,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-20 07:37:54,692 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 31 states have (on average 2.6451612903225805) 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 [2021-11-20 07:37:54,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:37:54,696 INFO L225 Difference]: With dead ends: 531 [2021-11-20 07:37:54,696 INFO L226 Difference]: Without dead ends: 531 [2021-11-20 07:37:54,698 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 27.2s TimeCoverageRelationStatistics Valid=220, Invalid=1664, Unknown=8, NotChecked=0, Total=1892 [2021-11-20 07:37:54,699 INFO L933 BasicCegarLoop]: 156 mSDtfsCounter, 8 mSDsluCounter, 1263 mSDsCounter, 0 mSdLazyCounter, 432 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 1419 SdHoareTripleChecker+Invalid, 891 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 451 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 07:37:54,699 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 1419 Invalid, 891 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 432 Invalid, 0 Unknown, 451 Unchecked, 2.3s Time] [2021-11-20 07:37:54,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2021-11-20 07:37:54,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 531. [2021-11-20 07:37:54,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 421 states have (on average 1.3016627078384797) internal successors, (548), 478 states have internal predecessors, (548), 50 states have call successors, (50), 5 states have call predecessors, (50), 5 states have return successors, (50), 47 states have call predecessors, (50), 50 states have call successors, (50) [2021-11-20 07:37:54,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 648 transitions. [2021-11-20 07:37:54,719 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 648 transitions. Word has length 122 [2021-11-20 07:37:54,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:37:54,719 INFO L470 AbstractCegarLoop]: Abstraction has 531 states and 648 transitions. [2021-11-20 07:37:54,720 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 31 states have (on average 2.6451612903225805) 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) [2021-11-20 07:37:54,720 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 648 transitions. [2021-11-20 07:37:54,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-20 07:37:54,721 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:37:54,721 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] [2021-11-20 07:37:54,771 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-11-20 07:37:54,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-20 07:37:54,947 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-11-20 07:37:54,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:37:54,948 INFO L85 PathProgramCache]: Analyzing trace with hash -1093938706, now seen corresponding path program 1 times [2021-11-20 07:37:54,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:37:54,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418989901] [2021-11-20 07:37:54,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:37:54,948 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:37:54,960 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:37:54,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [618064461] [2021-11-20 07:37:54,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:37:54,961 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:37:54,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:37:54,962 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:37:54,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-20 07:37:55,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:37:55,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 765 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-20 07:37:55,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:37:55,437 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2021-11-20 07:37:55,437 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:37:55,438 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:37:55,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418989901] [2021-11-20 07:37:55,438 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:37:55,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618064461] [2021-11-20 07:37:55,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618064461] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:37:55,438 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:37:55,438 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 07:37:55,438 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902532105] [2021-11-20 07:37:55,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:37:55,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 07:37:55,439 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:37:55,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 07:37:55,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 07:37:55,440 INFO L87 Difference]: Start difference. First operand 531 states and 648 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) [2021-11-20 07:37:55,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:37:55,607 INFO L93 Difference]: Finished difference Result 560 states and 678 transitions. [2021-11-20 07:37:55,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 07:37:55,607 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 [2021-11-20 07:37:55,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:37:55,612 INFO L225 Difference]: With dead ends: 560 [2021-11-20 07:37:55,612 INFO L226 Difference]: Without dead ends: 560 [2021-11-20 07:37:55,613 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 [2021-11-20 07:37:55,613 INFO L933 BasicCegarLoop]: 155 mSDtfsCounter, 214 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:37:55,614 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 268 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 07:37:55,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2021-11-20 07:37:55,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 530. [2021-11-20 07:37:55,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 530 states, 421 states have (on average 1.299287410926366) internal successors, (547), 477 states have internal predecessors, (547), 50 states have call successors, (50), 5 states have call predecessors, (50), 5 states have return successors, (50), 47 states have call predecessors, (50), 50 states have call successors, (50) [2021-11-20 07:37:55,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 647 transitions. [2021-11-20 07:37:55,633 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 647 transitions. Word has length 123 [2021-11-20 07:37:55,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:37:55,634 INFO L470 AbstractCegarLoop]: Abstraction has 530 states and 647 transitions. [2021-11-20 07:37:55,634 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) [2021-11-20 07:37:55,635 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 647 transitions. [2021-11-20 07:37:55,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-20 07:37:55,636 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:37:55,636 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] [2021-11-20 07:37:55,685 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-11-20 07:37:55,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-20 07:37:55,851 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-11-20 07:37:55,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:37:55,852 INFO L85 PathProgramCache]: Analyzing trace with hash -1093938705, now seen corresponding path program 1 times [2021-11-20 07:37:55,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:37:55,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752676448] [2021-11-20 07:37:55,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:37:55,852 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:37:55,863 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:37:55,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1573768708] [2021-11-20 07:37:55,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:37:55,864 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:37:55,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:37:55,865 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:37:55,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-20 07:37:57,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:37:57,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 765 conjuncts, 109 conjunts are in the unsatisfiable core [2021-11-20 07:37:57,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:37:58,049 INFO L354 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2021-11-20 07:37:58,049 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 14 treesize of output 20 [2021-11-20 07:37:58,104 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-20 07:37:58,104 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 [2021-11-20 07:37:58,498 INFO L354 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2021-11-20 07:37:58,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 26 treesize of output 37 [2021-11-20 07:37:58,512 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 14 treesize of output 16 [2021-11-20 07:37:59,137 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-11-20 07:37:59,138 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 52 treesize of output 54 [2021-11-20 07:37:59,184 INFO L354 Elim1Store]: treesize reduction 78, result has 26.4 percent of original size [2021-11-20 07:37:59,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 51 treesize of output 69 [2021-11-20 07:38:01,956 INFO L354 Elim1Store]: treesize reduction 40, result has 21.6 percent of original size [2021-11-20 07:38:01,957 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 3 case distinctions, treesize of input 70 treesize of output 75 [2021-11-20 07:38:02,020 INFO L354 Elim1Store]: treesize reduction 64, result has 21.0 percent of original size [2021-11-20 07:38:02,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 69 treesize of output 75 [2021-11-20 07:38:15,252 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 178 proven. 328 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2021-11-20 07:38:15,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:38:15,755 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:38:15,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752676448] [2021-11-20 07:38:15,755 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:38:15,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573768708] [2021-11-20 07:38:15,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573768708] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:38:15,755 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:38:15,756 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2021-11-20 07:38:15,756 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005667526] [2021-11-20 07:38:15,756 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 07:38:15,756 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-20 07:38:15,756 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:38:15,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-20 07:38:15,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=601, Unknown=4, NotChecked=0, Total=702 [2021-11-20 07:38:15,757 INFO L87 Difference]: Start difference. First operand 530 states and 647 transitions. Second operand has 25 states, 23 states have (on average 3.5652173913043477) internal successors, (82), 21 states have internal predecessors, (82), 5 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-20 07:38:17,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:38:17,203 INFO L93 Difference]: Finished difference Result 541 states and 661 transitions. [2021-11-20 07:38:17,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-20 07:38:17,217 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 3.5652173913043477) internal successors, (82), 21 states have internal predecessors, (82), 5 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 123 [2021-11-20 07:38:17,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:38:17,222 INFO L225 Difference]: With dead ends: 541 [2021-11-20 07:38:17,223 INFO L226 Difference]: Without dead ends: 541 [2021-11-20 07:38:17,226 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 14.3s TimeCoverageRelationStatistics Valid=140, Invalid=912, Unknown=4, NotChecked=0, Total=1056 [2021-11-20 07:38:17,228 INFO L933 BasicCegarLoop]: 151 mSDtfsCounter, 6 mSDsluCounter, 1521 mSDsCounter, 0 mSdLazyCounter, 550 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 1672 SdHoareTripleChecker+Invalid, 923 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 550 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 365 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-20 07:38:17,230 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 1672 Invalid, 923 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 550 Invalid, 0 Unknown, 365 Unchecked, 0.9s Time] [2021-11-20 07:38:17,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2021-11-20 07:38:17,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 538. [2021-11-20 07:38:17,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 538 states, 429 states have (on average 1.3006993006993006) internal successors, (558), 485 states have internal predecessors, (558), 50 states have call successors, (50), 5 states have call predecessors, (50), 5 states have return successors, (50), 47 states have call predecessors, (50), 50 states have call successors, (50) [2021-11-20 07:38:17,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 538 states to 538 states and 658 transitions. [2021-11-20 07:38:17,250 INFO L78 Accepts]: Start accepts. Automaton has 538 states and 658 transitions. Word has length 123 [2021-11-20 07:38:17,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:38:17,250 INFO L470 AbstractCegarLoop]: Abstraction has 538 states and 658 transitions. [2021-11-20 07:38:17,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 3.5652173913043477) internal successors, (82), 21 states have internal predecessors, (82), 5 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-20 07:38:17,251 INFO L276 IsEmpty]: Start isEmpty. Operand 538 states and 658 transitions. [2021-11-20 07:38:17,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-20 07:38:17,252 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:38:17,253 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] [2021-11-20 07:38:17,308 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-11-20 07:38:17,477 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:38:17,477 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-11-20 07:38:17,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:38:17,478 INFO L85 PathProgramCache]: Analyzing trace with hash 991893615, now seen corresponding path program 1 times [2021-11-20 07:38:17,478 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:38:17,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071928219] [2021-11-20 07:38:17,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:38:17,478 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:38:17,491 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:38:17,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [11924044] [2021-11-20 07:38:17,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:38:17,492 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:38:17,492 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:38:17,493 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:38:17,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-20 07:38:17,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:38:17,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 773 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 07:38:17,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:38:17,938 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2021-11-20 07:38:17,938 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:38:17,938 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:38:17,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071928219] [2021-11-20 07:38:17,939 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:38:17,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11924044] [2021-11-20 07:38:17,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [11924044] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:38:17,939 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:38:17,939 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 07:38:17,939 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793976714] [2021-11-20 07:38:17,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:38:17,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 07:38:17,940 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:38:17,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 07:38:17,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:38:17,940 INFO L87 Difference]: Start difference. First operand 538 states and 658 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) [2021-11-20 07:38:18,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:38:18,079 INFO L93 Difference]: Finished difference Result 565 states and 686 transitions. [2021-11-20 07:38:18,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:38:18,080 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 [2021-11-20 07:38:18,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:38:18,087 INFO L225 Difference]: With dead ends: 565 [2021-11-20 07:38:18,088 INFO L226 Difference]: Without dead ends: 565 [2021-11-20 07:38:18,088 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 [2021-11-20 07:38:18,089 INFO L933 BasicCegarLoop]: 159 mSDtfsCounter, 51 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:38:18,090 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 260 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:38:18,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2021-11-20 07:38:18,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 537. [2021-11-20 07:38:18,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 537 states, 429 states have (on average 1.2983682983682985) internal successors, (557), 484 states have internal predecessors, (557), 50 states have call successors, (50), 5 states have call predecessors, (50), 5 states have return successors, (50), 47 states have call predecessors, (50), 50 states have call successors, (50) [2021-11-20 07:38:18,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 537 states to 537 states and 657 transitions. [2021-11-20 07:38:18,113 INFO L78 Accepts]: Start accepts. Automaton has 537 states and 657 transitions. Word has length 125 [2021-11-20 07:38:18,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:38:18,114 INFO L470 AbstractCegarLoop]: Abstraction has 537 states and 657 transitions. [2021-11-20 07:38:18,114 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) [2021-11-20 07:38:18,114 INFO L276 IsEmpty]: Start isEmpty. Operand 537 states and 657 transitions. [2021-11-20 07:38:18,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-20 07:38:18,116 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:38:18,116 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] [2021-11-20 07:38:18,164 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-11-20 07:38:18,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-11-20 07:38:18,331 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr25REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-11-20 07:38:18,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:38:18,332 INFO L85 PathProgramCache]: Analyzing trace with hash 991893616, now seen corresponding path program 1 times [2021-11-20 07:38:18,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:38:18,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621123570] [2021-11-20 07:38:18,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:38:18,332 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:38:18,340 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:38:18,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [748208584] [2021-11-20 07:38:18,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:38:18,341 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:38:18,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:38:18,342 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:38:18,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-11-20 07:38:18,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:38:18,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 773 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 07:38:18,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:38:18,784 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2021-11-20 07:38:18,785 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:38:18,785 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:38:18,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621123570] [2021-11-20 07:38:18,785 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:38:18,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748208584] [2021-11-20 07:38:18,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748208584] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:38:18,785 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:38:18,785 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 07:38:18,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684572635] [2021-11-20 07:38:18,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:38:18,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 07:38:18,786 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:38:18,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 07:38:18,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:38:18,787 INFO L87 Difference]: Start difference. First operand 537 states and 657 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) [2021-11-20 07:38:19,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:38:19,025 INFO L93 Difference]: Finished difference Result 538 states and 659 transitions. [2021-11-20 07:38:19,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:38:19,027 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 [2021-11-20 07:38:19,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:38:19,030 INFO L225 Difference]: With dead ends: 538 [2021-11-20 07:38:19,030 INFO L226 Difference]: Without dead ends: 538 [2021-11-20 07:38:19,030 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 [2021-11-20 07:38:19,031 INFO L933 BasicCegarLoop]: 152 mSDtfsCounter, 107 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:38:19,031 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 199 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 07:38:19,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2021-11-20 07:38:19,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 536. [2021-11-20 07:38:19,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 536 states, 429 states have (on average 1.2960372960372961) internal successors, (556), 483 states have internal predecessors, (556), 50 states have call successors, (50), 5 states have call predecessors, (50), 5 states have return successors, (50), 47 states have call predecessors, (50), 50 states have call successors, (50) [2021-11-20 07:38:19,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 536 states to 536 states and 656 transitions. [2021-11-20 07:38:19,049 INFO L78 Accepts]: Start accepts. Automaton has 536 states and 656 transitions. Word has length 125 [2021-11-20 07:38:19,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:38:19,049 INFO L470 AbstractCegarLoop]: Abstraction has 536 states and 656 transitions. [2021-11-20 07:38:19,050 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) [2021-11-20 07:38:19,050 INFO L276 IsEmpty]: Start isEmpty. Operand 536 states and 656 transitions. [2021-11-20 07:38:19,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-11-20 07:38:19,051 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:38:19,051 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] [2021-11-20 07:38:19,098 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-11-20 07:38:19,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:38:19,267 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr27REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-11-20 07:38:19,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:38:19,268 INFO L85 PathProgramCache]: Analyzing trace with hash -334021032, now seen corresponding path program 1 times [2021-11-20 07:38:19,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:38:19,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221957529] [2021-11-20 07:38:19,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:38:19,268 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:38:19,287 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:38:19,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [157799968] [2021-11-20 07:38:19,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:38:19,289 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:38:19,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:38:19,290 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:38:19,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-20 07:38:19,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:38:19,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 785 conjuncts, 115 conjunts are in the unsatisfiable core [2021-11-20 07:38:19,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:38:19,804 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-11-20 07:38:19,804 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 32 [2021-11-20 07:38:19,823 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-20 07:38:19,823 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 33 [2021-11-20 07:38:20,153 INFO L354 Elim1Store]: treesize reduction 40, result has 21.6 percent of original size [2021-11-20 07:38:20,154 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 3 case distinctions, treesize of input 46 treesize of output 51 [2021-11-20 07:38:20,206 INFO L354 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2021-11-20 07:38:20,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 45 treesize of output 56 [2021-11-20 07:38:20,867 INFO L354 Elim1Store]: treesize reduction 60, result has 31.8 percent of original size [2021-11-20 07:38:20,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 61 treesize of output 81 [2021-11-20 07:38:20,924 INFO L354 Elim1Store]: treesize reduction 66, result has 19.5 percent of original size [2021-11-20 07:38:20,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 56 treesize of output 64 [2021-11-20 07:38:21,548 INFO L354 Elim1Store]: treesize reduction 66, result has 19.5 percent of original size [2021-11-20 07:38:21,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 56 treesize of output 64 [2021-11-20 07:38:25,858 INFO L354 Elim1Store]: treesize reduction 60, result has 31.8 percent of original size [2021-11-20 07:38:25,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 78 treesize of output 98 [2021-11-20 07:38:25,916 INFO L354 Elim1Store]: treesize reduction 104, result has 16.8 percent of original size [2021-11-20 07:38:25,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 98 treesize of output 109 [2021-11-20 07:38:31,712 INFO L354 Elim1Store]: treesize reduction 60, result has 31.8 percent of original size [2021-11-20 07:38:31,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 92 treesize of output 112 [2021-11-20 07:38:31,788 INFO L354 Elim1Store]: treesize reduction 150, result has 14.8 percent of original size [2021-11-20 07:38:31,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 112 treesize of output 126 [2021-11-20 07:38:35,282 INFO L354 Elim1Store]: treesize reduction 72, result has 18.2 percent of original size [2021-11-20 07:38:35,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 105 treesize of output 113 [2021-11-20 07:38:35,352 INFO L354 Elim1Store]: treesize reduction 144, result has 14.8 percent of original size [2021-11-20 07:38:35,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 113 treesize of output 123 [2021-11-20 07:46:41,267 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 2 proven. 403 refuted. 0 times theorem prover too weak. 211 trivial. 0 not checked. [2021-11-20 07:46:41,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:46:46,445 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:46:46,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221957529] [2021-11-20 07:46:46,446 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:46:46,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157799968] [2021-11-20 07:46:46,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157799968] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:46:46,447 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:46:46,447 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2021-11-20 07:46:46,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810698739] [2021-11-20 07:46:46,447 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 07:46:46,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-20 07:46:46,448 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:46:46,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-20 07:46:46,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1040, Unknown=11, NotChecked=0, Total=1190 [2021-11-20 07:46:46,449 INFO L87 Difference]: Start difference. First operand 536 states and 656 transitions. Second operand has 28 states, 24 states have (on average 3.0833333333333335) internal successors, (74), 22 states have internal predecessors, (74), 6 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-20 07:46:47,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:46:47,728 INFO L93 Difference]: Finished difference Result 617 states and 750 transitions. [2021-11-20 07:46:47,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-20 07:46:47,729 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 24 states have (on average 3.0833333333333335) internal successors, (74), 22 states have internal predecessors, (74), 6 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 129 [2021-11-20 07:46:47,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:46:47,733 INFO L225 Difference]: With dead ends: 617 [2021-11-20 07:46:47,734 INFO L226 Difference]: Without dead ends: 617 [2021-11-20 07:46:47,735 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 126 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 39.5s TimeCoverageRelationStatistics Valid=192, Invalid=1603, Unknown=11, NotChecked=0, Total=1806 [2021-11-20 07:46:47,735 INFO L933 BasicCegarLoop]: 155 mSDtfsCounter, 11 mSDsluCounter, 2062 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 2217 SdHoareTripleChecker+Invalid, 1638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1505 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 07:46:47,736 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 2217 Invalid, 1638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 125 Invalid, 0 Unknown, 1505 Unchecked, 0.3s Time] [2021-11-20 07:46:47,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2021-11-20 07:46:47,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 613. [2021-11-20 07:46:47,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 613 states, 496 states have (on average 1.2701612903225807) internal successors, (630), 552 states have internal predecessors, (630), 58 states have call successors, (58), 7 states have call predecessors, (58), 7 states have return successors, (58), 53 states have call predecessors, (58), 58 states have call successors, (58) [2021-11-20 07:46:47,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 613 states to 613 states and 746 transitions. [2021-11-20 07:46:47,756 INFO L78 Accepts]: Start accepts. Automaton has 613 states and 746 transitions. Word has length 129 [2021-11-20 07:46:47,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:46:47,756 INFO L470 AbstractCegarLoop]: Abstraction has 613 states and 746 transitions. [2021-11-20 07:46:47,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 24 states have (on average 3.0833333333333335) internal successors, (74), 22 states have internal predecessors, (74), 6 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-20 07:46:47,757 INFO L276 IsEmpty]: Start isEmpty. Operand 613 states and 746 transitions. [2021-11-20 07:46:47,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-11-20 07:46:47,758 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:46:47,758 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] [2021-11-20 07:46:47,806 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-11-20 07:46:47,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-11-20 07:46:47,971 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr26REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-11-20 07:46:47,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:46:47,972 INFO L85 PathProgramCache]: Analyzing trace with hash -334021033, now seen corresponding path program 1 times [2021-11-20 07:46:47,972 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:46:47,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520647490] [2021-11-20 07:46:47,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:46:47,972 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:46:47,992 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:46:47,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [267226979] [2021-11-20 07:46:47,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:46:47,992 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:46:47,992 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:46:47,993 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:46:47,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-20 07:46:48,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:46:48,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 785 conjuncts, 51 conjunts are in the unsatisfiable core [2021-11-20 07:46:48,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:46:48,310 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 07:46:48,311 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 [2021-11-20 07:46:48,406 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 07:46:48,406 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 [2021-11-20 07:46:48,500 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 07:46:48,500 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 [2021-11-20 07:46:48,601 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 07:46:48,601 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 [2021-11-20 07:46:48,693 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 07:46:48,694 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 [2021-11-20 07:46:48,768 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 07:46:48,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 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 [2021-11-20 07:46:48,931 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2021-11-20 07:46:48,932 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:46:48,932 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:46:48,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520647490] [2021-11-20 07:46:48,932 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:46:48,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267226979] [2021-11-20 07:46:48,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267226979] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:46:48,932 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:46:48,932 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 07:46:48,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788639585] [2021-11-20 07:46:48,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:46:48,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 07:46:48,933 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:46:48,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 07:46:48,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-20 07:46:48,935 INFO L87 Difference]: Start difference. First operand 613 states and 746 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) [2021-11-20 07:46:49,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:46:49,316 INFO L93 Difference]: Finished difference Result 636 states and 768 transitions. [2021-11-20 07:46:49,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 07:46:49,317 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 [2021-11-20 07:46:49,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:46:49,321 INFO L225 Difference]: With dead ends: 636 [2021-11-20 07:46:49,321 INFO L226 Difference]: Without dead ends: 636 [2021-11-20 07:46:49,322 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 118 SyntacticMatches, 6 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-20 07:46:49,322 INFO L933 BasicCegarLoop]: 125 mSDtfsCounter, 164 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 433 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 70 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 07:46:49,323 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 433 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 189 Invalid, 0 Unknown, 70 Unchecked, 0.3s Time] [2021-11-20 07:46:49,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 636 states. [2021-11-20 07:46:49,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 636 to 610. [2021-11-20 07:46:49,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 610 states, 496 states have (on average 1.2620967741935485) internal successors, (626), 549 states have internal predecessors, (626), 58 states have call successors, (58), 7 states have call predecessors, (58), 7 states have return successors, (58), 53 states have call predecessors, (58), 58 states have call successors, (58) [2021-11-20 07:46:49,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 610 states to 610 states and 742 transitions. [2021-11-20 07:46:49,342 INFO L78 Accepts]: Start accepts. Automaton has 610 states and 742 transitions. Word has length 129 [2021-11-20 07:46:49,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:46:49,342 INFO L470 AbstractCegarLoop]: Abstraction has 610 states and 742 transitions. [2021-11-20 07:46:49,343 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) [2021-11-20 07:46:49,343 INFO L276 IsEmpty]: Start isEmpty. Operand 610 states and 742 transitions. [2021-11-20 07:46:49,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-20 07:46:49,344 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:46:49,344 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] [2021-11-20 07:46:49,393 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-11-20 07:46:49,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-11-20 07:46:49,567 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-11-20 07:46:49,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:46:49,568 INFO L85 PathProgramCache]: Analyzing trace with hash -1764717332, now seen corresponding path program 1 times [2021-11-20 07:46:49,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:46:49,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896498187] [2021-11-20 07:46:49,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:46:49,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:46:49,581 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:46:49,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1829938417] [2021-11-20 07:46:49,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:46:49,582 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:46:49,582 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:46:49,583 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:46:49,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-11-20 07:46:49,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:46:49,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 793 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-20 07:46:49,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:46:50,033 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2021-11-20 07:46:50,034 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:46:50,034 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:46:50,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896498187] [2021-11-20 07:46:50,034 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:46:50,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829938417] [2021-11-20 07:46:50,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829938417] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:46:50,034 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:46:50,034 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 07:46:50,034 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047404456] [2021-11-20 07:46:50,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:46:50,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 07:46:50,035 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:46:50,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 07:46:50,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 07:46:50,035 INFO L87 Difference]: Start difference. First operand 610 states and 742 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) [2021-11-20 07:46:50,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:46:50,330 INFO L93 Difference]: Finished difference Result 635 states and 767 transitions. [2021-11-20 07:46:50,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 07:46:50,330 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 [2021-11-20 07:46:50,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:46:50,334 INFO L225 Difference]: With dead ends: 635 [2021-11-20 07:46:50,334 INFO L226 Difference]: Without dead ends: 635 [2021-11-20 07:46:50,334 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 [2021-11-20 07:46:50,335 INFO L933 BasicCegarLoop]: 154 mSDtfsCounter, 182 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 07:46:50,335 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 267 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 07:46:50,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2021-11-20 07:46:50,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 609. [2021-11-20 07:46:50,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 609 states, 496 states have (on average 1.2600806451612903) internal successors, (625), 548 states have internal predecessors, (625), 58 states have call successors, (58), 7 states have call predecessors, (58), 7 states have return successors, (58), 53 states have call predecessors, (58), 58 states have call successors, (58) [2021-11-20 07:46:50,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 609 states to 609 states and 741 transitions. [2021-11-20 07:46:50,351 INFO L78 Accepts]: Start accepts. Automaton has 609 states and 741 transitions. Word has length 130 [2021-11-20 07:46:50,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:46:50,352 INFO L470 AbstractCegarLoop]: Abstraction has 609 states and 741 transitions. [2021-11-20 07:46:50,352 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) [2021-11-20 07:46:50,352 INFO L276 IsEmpty]: Start isEmpty. Operand 609 states and 741 transitions. [2021-11-20 07:46:50,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-20 07:46:50,354 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:46:50,355 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] [2021-11-20 07:46:50,415 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-11-20 07:46:50,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:46:50,583 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr29REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-11-20 07:46:50,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:46:50,584 INFO L85 PathProgramCache]: Analyzing trace with hash -1764717331, now seen corresponding path program 1 times [2021-11-20 07:46:50,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:46:50,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774904310] [2021-11-20 07:46:50,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:46:50,584 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:46:50,593 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:46:50,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [400280868] [2021-11-20 07:46:50,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:46:50,593 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:46:50,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:46:50,594 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:46:50,596 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-11-20 07:46:50,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:46:50,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 793 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-20 07:46:50,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:46:51,709 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 170 refuted. 0 times theorem prover too weak. 446 trivial. 0 not checked. [2021-11-20 07:46:51,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:46:51,973 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 07:46:51,973 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 [2021-11-20 07:46:53,472 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 170 refuted. 0 times theorem prover too weak. 446 trivial. 0 not checked. [2021-11-20 07:46:53,472 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:46:53,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774904310] [2021-11-20 07:46:53,472 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:46:53,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400280868] [2021-11-20 07:46:53,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [400280868] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:46:53,472 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:46:53,472 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-11-20 07:46:53,473 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162801063] [2021-11-20 07:46:53,473 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:46:53,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-20 07:46:53,473 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:46:53,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-20 07:46:53,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-11-20 07:46:53,474 INFO L87 Difference]: Start difference. First operand 609 states and 741 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) [2021-11-20 07:46:54,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:46:54,081 INFO L93 Difference]: Finished difference Result 608 states and 740 transitions. [2021-11-20 07:46:54,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-20 07:46:54,082 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 [2021-11-20 07:46:54,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:46:54,085 INFO L225 Difference]: With dead ends: 608 [2021-11-20 07:46:54,085 INFO L226 Difference]: Without dead ends: 608 [2021-11-20 07:46:54,085 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-11-20 07:46:54,086 INFO L933 BasicCegarLoop]: 139 mSDtfsCounter, 524 mSDsluCounter, 873 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 524 SdHoareTripleChecker+Valid, 1012 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 07:46:54,086 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [524 Valid, 1012 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-20 07:46:54,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2021-11-20 07:46:54,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 608. [2021-11-20 07:46:54,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 608 states, 496 states have (on average 1.2580645161290323) internal successors, (624), 547 states have internal predecessors, (624), 58 states have call successors, (58), 7 states have call predecessors, (58), 7 states have return successors, (58), 53 states have call predecessors, (58), 58 states have call successors, (58) [2021-11-20 07:46:54,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 608 states to 608 states and 740 transitions. [2021-11-20 07:46:54,102 INFO L78 Accepts]: Start accepts. Automaton has 608 states and 740 transitions. Word has length 130 [2021-11-20 07:46:54,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:46:54,102 INFO L470 AbstractCegarLoop]: Abstraction has 608 states and 740 transitions. [2021-11-20 07:46:54,103 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) [2021-11-20 07:46:54,103 INFO L276 IsEmpty]: Start isEmpty. Operand 608 states and 740 transitions. [2021-11-20 07:46:54,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-20 07:46:54,104 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:46:54,105 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] [2021-11-20 07:46:54,152 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2021-11-20 07:46:54,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-11-20 07:46:54,331 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr31REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-11-20 07:46:54,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:46:54,332 INFO L85 PathProgramCache]: Analyzing trace with hash 618729134, now seen corresponding path program 1 times [2021-11-20 07:46:54,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:46:54,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107513939] [2021-11-20 07:46:54,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:46:54,332 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:46:54,341 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:46:54,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [538611325] [2021-11-20 07:46:54,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:46:54,342 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:46:54,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:46:54,343 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:46:54,345 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-11-20 07:46:54,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:46:54,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 801 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 07:46:54,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:46:54,830 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2021-11-20 07:46:54,830 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:46:54,831 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:46:54,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107513939] [2021-11-20 07:46:54,831 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:46:54,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538611325] [2021-11-20 07:46:54,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [538611325] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:46:54,831 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:46:54,831 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 07:46:54,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399987568] [2021-11-20 07:46:54,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:46:54,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 07:46:54,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:46:54,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 07:46:54,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:46:54,833 INFO L87 Difference]: Start difference. First operand 608 states and 740 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) [2021-11-20 07:46:55,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:46:55,388 INFO L93 Difference]: Finished difference Result 607 states and 739 transitions. [2021-11-20 07:46:55,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:46:55,391 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 [2021-11-20 07:46:55,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:46:55,395 INFO L225 Difference]: With dead ends: 607 [2021-11-20 07:46:55,395 INFO L226 Difference]: Without dead ends: 607 [2021-11-20 07:46:55,395 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 [2021-11-20 07:46:55,396 INFO L933 BasicCegarLoop]: 150 mSDtfsCounter, 90 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 07:46:55,396 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 203 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-20 07:46:55,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2021-11-20 07:46:55,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 607. [2021-11-20 07:46:55,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 607 states, 496 states have (on average 1.2560483870967742) internal successors, (623), 546 states have internal predecessors, (623), 58 states have call successors, (58), 7 states have call predecessors, (58), 7 states have return successors, (58), 53 states have call predecessors, (58), 58 states have call successors, (58) [2021-11-20 07:46:55,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 739 transitions. [2021-11-20 07:46:55,416 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 739 transitions. Word has length 132 [2021-11-20 07:46:55,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:46:55,416 INFO L470 AbstractCegarLoop]: Abstraction has 607 states and 739 transitions. [2021-11-20 07:46:55,417 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) [2021-11-20 07:46:55,417 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 739 transitions. [2021-11-20 07:46:55,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-11-20 07:46:55,419 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:46:55,419 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] [2021-11-20 07:46:55,459 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-11-20 07:46:55,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-11-20 07:46:55,640 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr33REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-11-20 07:46:55,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:46:55,641 INFO L85 PathProgramCache]: Analyzing trace with hash -1688061162, now seen corresponding path program 1 times [2021-11-20 07:46:55,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:46:55,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040867033] [2021-11-20 07:46:55,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:46:55,641 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:46:55,654 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:46:55,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1090760680] [2021-11-20 07:46:55,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:46:55,654 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:46:55,655 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:46:55,656 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:46:55,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-11-20 07:46:55,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:46:55,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 813 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-20 07:46:55,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:46:56,743 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2021-11-20 07:46:56,743 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:46:56,743 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:46:56,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040867033] [2021-11-20 07:46:56,743 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:46:56,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090760680] [2021-11-20 07:46:56,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090760680] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:46:56,744 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:46:56,744 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 07:46:56,744 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037751634] [2021-11-20 07:46:56,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:46:56,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 07:46:56,744 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:46:56,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 07:46:56,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:46:56,745 INFO L87 Difference]: Start difference. First operand 607 states and 739 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) [2021-11-20 07:46:57,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:46:57,081 INFO L93 Difference]: Finished difference Result 607 states and 739 transitions. [2021-11-20 07:46:57,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 07:46:57,084 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 [2021-11-20 07:46:57,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:46:57,088 INFO L225 Difference]: With dead ends: 607 [2021-11-20 07:46:57,088 INFO L226 Difference]: Without dead ends: 607 [2021-11-20 07:46:57,088 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 [2021-11-20 07:46:57,089 INFO L933 BasicCegarLoop]: 139 mSDtfsCounter, 347 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 347 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 07:46:57,089 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [347 Valid, 188 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 07:46:57,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2021-11-20 07:46:57,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 606. [2021-11-20 07:46:57,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 606 states, 496 states have (on average 1.2540322580645162) internal successors, (622), 545 states have internal predecessors, (622), 58 states have call successors, (58), 7 states have call predecessors, (58), 7 states have return successors, (58), 53 states have call predecessors, (58), 58 states have call successors, (58) [2021-11-20 07:46:57,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 606 states to 606 states and 738 transitions. [2021-11-20 07:46:57,106 INFO L78 Accepts]: Start accepts. Automaton has 606 states and 738 transitions. Word has length 136 [2021-11-20 07:46:57,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:46:57,106 INFO L470 AbstractCegarLoop]: Abstraction has 606 states and 738 transitions. [2021-11-20 07:46:57,106 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) [2021-11-20 07:46:57,107 INFO L276 IsEmpty]: Start isEmpty. Operand 606 states and 738 transitions. [2021-11-20 07:46:57,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-11-20 07:46:57,108 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:46:57,108 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] [2021-11-20 07:46:57,148 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-11-20 07:46:57,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-11-20 07:46:57,335 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr34REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-11-20 07:46:57,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:46:57,336 INFO L85 PathProgramCache]: Analyzing trace with hash 1270864121, now seen corresponding path program 1 times [2021-11-20 07:46:57,336 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:46:57,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644653261] [2021-11-20 07:46:57,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:46:57,336 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:46:57,345 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:46:57,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [652661334] [2021-11-20 07:46:57,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:46:57,346 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:46:57,346 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:46:57,347 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:46:57,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01faa2d-13ea-4c93-b027-e5c1003f8622/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-11-20 07:46:57,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:46:57,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 829 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-20 07:46:57,548 INFO L286 TraceCheckSpWp]: Computing forward predicates...