./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety-ext/tree_cnstr.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version f8e1c903 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b50a12a-cd1e-4684-9ccb-93d7319de555/bin/uautomizer-IVEQpCNsaX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b50a12a-cd1e-4684-9ccb-93d7319de555/bin/uautomizer-IVEQpCNsaX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b50a12a-cd1e-4684-9ccb-93d7319de555/bin/uautomizer-IVEQpCNsaX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b50a12a-cd1e-4684-9ccb-93d7319de555/bin/uautomizer-IVEQpCNsaX/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-ext/tree_cnstr.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b50a12a-cd1e-4684-9ccb-93d7319de555/bin/uautomizer-IVEQpCNsaX/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b50a12a-cd1e-4684-9ccb-93d7319de555/bin/uautomizer-IVEQpCNsaX --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 ba983053090b7e7410066c63fe0cfe9ad27960a7dc19d54045684ba21359c88d --- Real Ultimate output --- This is Ultimate 0.2.1-dev-f8e1c90 [2021-11-09 09:38:16,132 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-09 09:38:16,135 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-09 09:38:16,191 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-09 09:38:16,192 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-09 09:38:16,196 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-09 09:38:16,198 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-09 09:38:16,202 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-09 09:38:16,206 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-09 09:38:16,211 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-09 09:38:16,213 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-09 09:38:16,215 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-09 09:38:16,215 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-09 09:38:16,218 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-09 09:38:16,221 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-09 09:38:16,230 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-09 09:38:16,232 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-09 09:38:16,233 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-09 09:38:16,236 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-09 09:38:16,244 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-09 09:38:16,246 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-09 09:38:16,248 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-09 09:38:16,251 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-09 09:38:16,252 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-09 09:38:16,261 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-09 09:38:16,262 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-09 09:38:16,262 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-09 09:38:16,264 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-09 09:38:16,265 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-09 09:38:16,267 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-09 09:38:16,267 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-09 09:38:16,268 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-09 09:38:16,271 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-09 09:38:16,272 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-09 09:38:16,274 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-09 09:38:16,274 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-09 09:38:16,275 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-09 09:38:16,275 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-09 09:38:16,276 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-09 09:38:16,277 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-09 09:38:16,277 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-09 09:38:16,278 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b50a12a-cd1e-4684-9ccb-93d7319de555/bin/uautomizer-IVEQpCNsaX/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-11-09 09:38:16,323 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-09 09:38:16,323 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-09 09:38:16,324 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-09 09:38:16,324 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-09 09:38:16,326 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-09 09:38:16,326 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-09 09:38:16,326 INFO L138 SettingsManager]: * Use SBE=true [2021-11-09 09:38:16,327 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-09 09:38:16,327 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-09 09:38:16,327 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-09 09:38:16,328 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-09 09:38:16,328 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-09 09:38:16,329 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-09 09:38:16,329 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-09 09:38:16,329 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-09 09:38:16,329 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-09 09:38:16,330 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-09 09:38:16,330 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-09 09:38:16,330 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-09 09:38:16,330 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-09 09:38:16,330 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-09 09:38:16,331 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-09 09:38:16,331 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-09 09:38:16,331 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 09:38:16,331 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-09 09:38:16,332 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-09 09:38:16,332 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-09 09:38:16,332 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-09 09:38:16,332 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-09 09:38:16,334 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_7b50a12a-cd1e-4684-9ccb-93d7319de555/bin/uautomizer-IVEQpCNsaX/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b50a12a-cd1e-4684-9ccb-93d7319de555/bin/uautomizer-IVEQpCNsaX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ba983053090b7e7410066c63fe0cfe9ad27960a7dc19d54045684ba21359c88d [2021-11-09 09:38:16,614 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-09 09:38:16,640 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-09 09:38:16,643 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-09 09:38:16,645 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-09 09:38:16,646 INFO L275 PluginConnector]: CDTParser initialized [2021-11-09 09:38:16,647 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b50a12a-cd1e-4684-9ccb-93d7319de555/bin/uautomizer-IVEQpCNsaX/../../sv-benchmarks/c/memsafety-ext/tree_cnstr.i [2021-11-09 09:38:16,731 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b50a12a-cd1e-4684-9ccb-93d7319de555/bin/uautomizer-IVEQpCNsaX/data/6f0d9397d/890e0c4d1b5a4e1b8ddbde795764e1ed/FLAG32d97f061 [2021-11-09 09:38:17,247 INFO L306 CDTParser]: Found 1 translation units. [2021-11-09 09:38:17,247 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b50a12a-cd1e-4684-9ccb-93d7319de555/sv-benchmarks/c/memsafety-ext/tree_cnstr.i [2021-11-09 09:38:17,261 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b50a12a-cd1e-4684-9ccb-93d7319de555/bin/uautomizer-IVEQpCNsaX/data/6f0d9397d/890e0c4d1b5a4e1b8ddbde795764e1ed/FLAG32d97f061 [2021-11-09 09:38:17,563 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b50a12a-cd1e-4684-9ccb-93d7319de555/bin/uautomizer-IVEQpCNsaX/data/6f0d9397d/890e0c4d1b5a4e1b8ddbde795764e1ed [2021-11-09 09:38:17,566 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-09 09:38:17,567 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-11-09 09:38:17,575 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-09 09:38:17,576 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-09 09:38:17,579 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-09 09:38:17,580 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 09:38:17" (1/1) ... [2021-11-09 09:38:17,581 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a450388 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:38:17, skipping insertion in model container [2021-11-09 09:38:17,581 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 09:38:17" (1/1) ... [2021-11-09 09:38:17,588 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-09 09:38:17,632 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-09 09:38:17,914 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 09:38:17,922 INFO L203 MainTranslator]: Completed pre-run [2021-11-09 09:38:17,989 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 09:38:18,032 INFO L208 MainTranslator]: Completed translation [2021-11-09 09:38:18,034 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:38:18 WrapperNode [2021-11-09 09:38:18,034 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-09 09:38:18,035 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-09 09:38:18,036 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-09 09:38:18,036 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-09 09:38:18,049 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:38:18" (1/1) ... [2021-11-09 09:38:18,051 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:38:18" (1/1) ... [2021-11-09 09:38:18,083 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:38:18" (1/1) ... [2021-11-09 09:38:18,084 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:38:18" (1/1) ... [2021-11-09 09:38:18,107 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:38:18" (1/1) ... [2021-11-09 09:38:18,112 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:38:18" (1/1) ... [2021-11-09 09:38:18,117 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:38:18" (1/1) ... [2021-11-09 09:38:18,138 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-09 09:38:18,139 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-09 09:38:18,139 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-09 09:38:18,139 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-09 09:38:18,140 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:38:18" (1/1) ... [2021-11-09 09:38:18,154 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 09:38:18,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b50a12a-cd1e-4684-9ccb-93d7319de555/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:38:18,178 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b50a12a-cd1e-4684-9ccb-93d7319de555/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-09 09:38:18,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b50a12a-cd1e-4684-9ccb-93d7319de555/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-09 09:38:18,230 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-11-09 09:38:18,231 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-09 09:38:18,231 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-11-09 09:38:18,231 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-11-09 09:38:18,231 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-11-09 09:38:18,232 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-11-09 09:38:18,232 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-11-09 09:38:18,232 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-11-09 09:38:18,232 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-11-09 09:38:18,232 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-11-09 09:38:18,233 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-11-09 09:38:18,233 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-11-09 09:38:18,233 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-11-09 09:38:18,233 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-11-09 09:38:18,233 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-11-09 09:38:18,234 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-09 09:38:18,234 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-11-09 09:38:18,234 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-11-09 09:38:18,234 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-11-09 09:38:18,234 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-11-09 09:38:18,235 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-11-09 09:38:18,235 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-11-09 09:38:18,235 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-11-09 09:38:18,235 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-11-09 09:38:18,235 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-11-09 09:38:18,236 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-11-09 09:38:18,236 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-11-09 09:38:18,236 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-11-09 09:38:18,236 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-11-09 09:38:18,236 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-11-09 09:38:18,236 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-11-09 09:38:18,237 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-11-09 09:38:18,237 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-11-09 09:38:18,237 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-11-09 09:38:18,237 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-11-09 09:38:18,237 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-11-09 09:38:18,237 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-11-09 09:38:18,238 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-11-09 09:38:18,238 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-11-09 09:38:18,238 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-11-09 09:38:18,238 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-11-09 09:38:18,238 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-11-09 09:38:18,239 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-11-09 09:38:18,239 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-11-09 09:38:18,239 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-11-09 09:38:18,239 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-11-09 09:38:18,239 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-11-09 09:38:18,239 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-11-09 09:38:18,240 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-11-09 09:38:18,240 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-11-09 09:38:18,240 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-11-09 09:38:18,240 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-11-09 09:38:18,241 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-11-09 09:38:18,241 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-11-09 09:38:18,241 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-11-09 09:38:18,241 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-11-09 09:38:18,241 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-11-09 09:38:18,241 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-11-09 09:38:18,242 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-11-09 09:38:18,242 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-11-09 09:38:18,242 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-11-09 09:38:18,242 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-11-09 09:38:18,242 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-11-09 09:38:18,243 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-11-09 09:38:18,243 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-11-09 09:38:18,243 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-11-09 09:38:18,243 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-11-09 09:38:18,243 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-11-09 09:38:18,243 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-11-09 09:38:18,244 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-11-09 09:38:18,244 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-11-09 09:38:18,244 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-11-09 09:38:18,244 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-11-09 09:38:18,244 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-11-09 09:38:18,245 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-11-09 09:38:18,245 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-11-09 09:38:18,245 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-11-09 09:38:18,245 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-11-09 09:38:18,245 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-11-09 09:38:18,245 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-11-09 09:38:18,246 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-11-09 09:38:18,246 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-11-09 09:38:18,246 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-11-09 09:38:18,246 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-11-09 09:38:18,246 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-11-09 09:38:18,247 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-11-09 09:38:18,247 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-11-09 09:38:18,247 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-11-09 09:38:18,247 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-11-09 09:38:18,247 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-11-09 09:38:18,248 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-11-09 09:38:18,248 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-11-09 09:38:18,248 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-11-09 09:38:18,248 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-11-09 09:38:18,248 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-11-09 09:38:18,249 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-11-09 09:38:18,249 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-11-09 09:38:18,249 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-11-09 09:38:18,249 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-11-09 09:38:18,250 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-11-09 09:38:18,250 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-11-09 09:38:18,250 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-11-09 09:38:18,251 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-11-09 09:38:18,251 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-11-09 09:38:18,251 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-11-09 09:38:18,251 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-11-09 09:38:18,251 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-11-09 09:38:18,252 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-11-09 09:38:18,252 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-11-09 09:38:18,252 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-11-09 09:38:18,252 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-11-09 09:38:18,253 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-11-09 09:38:18,253 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-11-09 09:38:18,253 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-11-09 09:38:18,253 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-11-09 09:38:18,253 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-11-09 09:38:18,254 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-11-09 09:38:18,254 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-11-09 09:38:18,254 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-11-09 09:38:18,254 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-11-09 09:38:18,254 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-11-09 09:38:18,255 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-11-09 09:38:18,255 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-11-09 09:38:18,255 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-09 09:38:18,255 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-09 09:38:18,256 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-09 09:38:18,256 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-09 09:38:18,256 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-11-09 09:38:18,256 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-09 09:38:18,256 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-09 09:38:18,257 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-09 09:38:18,257 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-09 09:38:19,036 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-09 09:38:19,037 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-09 09:38:19,041 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 09:38:19 BoogieIcfgContainer [2021-11-09 09:38:19,042 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-09 09:38:19,045 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-09 09:38:19,045 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-09 09:38:19,050 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-09 09:38:19,059 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 09:38:17" (1/3) ... [2021-11-09 09:38:19,060 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@715647e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 09:38:19, skipping insertion in model container [2021-11-09 09:38:19,060 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:38:18" (2/3) ... [2021-11-09 09:38:19,061 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@715647e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 09:38:19, skipping insertion in model container [2021-11-09 09:38:19,061 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 09:38:19" (3/3) ... [2021-11-09 09:38:19,063 INFO L111 eAbstractionObserver]: Analyzing ICFG tree_cnstr.i [2021-11-09 09:38:19,070 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-09 09:38:19,070 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 56 error locations. [2021-11-09 09:38:19,166 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-09 09:38:19,174 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 [2021-11-09 09:38:19,174 INFO L340 AbstractCegarLoop]: Starting to check reachability of 56 error locations. [2021-11-09 09:38:19,219 INFO L276 IsEmpty]: Start isEmpty. Operand has 128 states, 67 states have (on average 2.1044776119402986) internal successors, (141), 123 states have internal predecessors, (141), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-09 09:38:19,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-09 09:38:19,229 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:38:19,230 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:38:19,230 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 51 more)] === [2021-11-09 09:38:19,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:38:19,238 INFO L85 PathProgramCache]: Analyzing trace with hash 1132679471, now seen corresponding path program 1 times [2021-11-09 09:38:19,250 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:38:19,250 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850949695] [2021-11-09 09:38:19,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:38:19,252 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:38:19,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:19,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:38:19,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:19,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:38:19,631 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:38:19,631 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850949695] [2021-11-09 09:38:19,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850949695] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:38:19,633 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:38:19,633 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 09:38:19,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828782669] [2021-11-09 09:38:19,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 09:38:19,646 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:38:19,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 09:38:19,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:38:19,680 INFO L87 Difference]: Start difference. First operand has 128 states, 67 states have (on average 2.1044776119402986) internal successors, (141), 123 states have internal predecessors, (141), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:38:20,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:38:20,166 INFO L93 Difference]: Finished difference Result 170 states and 189 transitions. [2021-11-09 09:38:20,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 09:38:20,169 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 7 [2021-11-09 09:38:20,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:38:20,190 INFO L225 Difference]: With dead ends: 170 [2021-11-09 09:38:20,191 INFO L226 Difference]: Without dead ends: 166 [2021-11-09 09:38:20,194 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:38:20,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-11-09 09:38:20,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 123. [2021-11-09 09:38:20,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 66 states have (on average 2.015151515151515) internal successors, (133), 119 states have internal predecessors, (133), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:38:20,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 136 transitions. [2021-11-09 09:38:20,247 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 136 transitions. Word has length 7 [2021-11-09 09:38:20,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:38:20,247 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 136 transitions. [2021-11-09 09:38:20,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:38:20,248 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 136 transitions. [2021-11-09 09:38:20,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-09 09:38:20,248 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:38:20,248 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:38:20,249 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-09 09:38:20,249 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 51 more)] === [2021-11-09 09:38:20,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:38:20,250 INFO L85 PathProgramCache]: Analyzing trace with hash 1132679472, now seen corresponding path program 1 times [2021-11-09 09:38:20,250 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:38:20,250 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803049799] [2021-11-09 09:38:20,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:38:20,251 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:38:20,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:20,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:38:20,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:20,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:38:20,388 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:38:20,389 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803049799] [2021-11-09 09:38:20,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803049799] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:38:20,389 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:38:20,389 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 09:38:20,389 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686996299] [2021-11-09 09:38:20,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 09:38:20,390 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:38:20,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 09:38:20,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:38:20,391 INFO L87 Difference]: Start difference. First operand 123 states and 136 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:38:20,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:38:20,709 INFO L93 Difference]: Finished difference Result 164 states and 182 transitions. [2021-11-09 09:38:20,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 09:38:20,710 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 7 [2021-11-09 09:38:20,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:38:20,718 INFO L225 Difference]: With dead ends: 164 [2021-11-09 09:38:20,719 INFO L226 Difference]: Without dead ends: 164 [2021-11-09 09:38:20,720 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:38:20,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-11-09 09:38:20,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 121. [2021-11-09 09:38:20,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 66 states have (on average 1.9848484848484849) internal successors, (131), 117 states have internal predecessors, (131), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:38:20,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 134 transitions. [2021-11-09 09:38:20,750 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 134 transitions. Word has length 7 [2021-11-09 09:38:20,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:38:20,751 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 134 transitions. [2021-11-09 09:38:20,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:38:20,752 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 134 transitions. [2021-11-09 09:38:20,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-09 09:38:20,753 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:38:20,753 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:38:20,753 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-09 09:38:20,754 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr4REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 51 more)] === [2021-11-09 09:38:20,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:38:20,755 INFO L85 PathProgramCache]: Analyzing trace with hash 1107563195, now seen corresponding path program 1 times [2021-11-09 09:38:20,755 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:38:20,756 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883314014] [2021-11-09 09:38:20,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:38:20,756 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:38:20,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:20,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:38:20,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:20,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:38:20,908 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:38:20,908 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883314014] [2021-11-09 09:38:20,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883314014] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:38:20,909 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:38:20,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 09:38:20,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462946313] [2021-11-09 09:38:20,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 09:38:20,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:38:20,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 09:38:20,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-09 09:38:20,916 INFO L87 Difference]: Start difference. First operand 121 states and 134 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:38:21,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:38:21,221 INFO L93 Difference]: Finished difference Result 150 states and 169 transitions. [2021-11-09 09:38:21,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 09:38:21,222 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-11-09 09:38:21,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:38:21,224 INFO L225 Difference]: With dead ends: 150 [2021-11-09 09:38:21,224 INFO L226 Difference]: Without dead ends: 150 [2021-11-09 09:38:21,224 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-09 09:38:21,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-11-09 09:38:21,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 108. [2021-11-09 09:38:21,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 69 states have (on average 1.7536231884057971) internal successors, (121), 104 states have internal predecessors, (121), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:38:21,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 124 transitions. [2021-11-09 09:38:21,235 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 124 transitions. Word has length 11 [2021-11-09 09:38:21,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:38:21,235 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 124 transitions. [2021-11-09 09:38:21,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:38:21,236 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 124 transitions. [2021-11-09 09:38:21,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-09 09:38:21,236 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:38:21,237 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:38:21,237 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-09 09:38:21,237 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 51 more)] === [2021-11-09 09:38:21,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:38:21,238 INFO L85 PathProgramCache]: Analyzing trace with hash 1107563196, now seen corresponding path program 1 times [2021-11-09 09:38:21,238 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:38:21,238 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064504819] [2021-11-09 09:38:21,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:38:21,239 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:38:21,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:21,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:38:21,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:21,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:38:21,333 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:38:21,333 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064504819] [2021-11-09 09:38:21,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064504819] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:38:21,334 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:38:21,334 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 09:38:21,334 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558030511] [2021-11-09 09:38:21,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 09:38:21,335 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:38:21,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 09:38:21,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-09 09:38:21,336 INFO L87 Difference]: Start difference. First operand 108 states and 124 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:38:21,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:38:21,726 INFO L93 Difference]: Finished difference Result 231 states and 263 transitions. [2021-11-09 09:38:21,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 09:38:21,727 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-11-09 09:38:21,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:38:21,728 INFO L225 Difference]: With dead ends: 231 [2021-11-09 09:38:21,728 INFO L226 Difference]: Without dead ends: 231 [2021-11-09 09:38:21,729 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-09 09:38:21,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-11-09 09:38:21,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 176. [2021-11-09 09:38:21,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 137 states have (on average 1.6934306569343065) internal successors, (232), 172 states have internal predecessors, (232), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:38:21,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 235 transitions. [2021-11-09 09:38:21,748 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 235 transitions. Word has length 11 [2021-11-09 09:38:21,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:38:21,749 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 235 transitions. [2021-11-09 09:38:21,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:38:21,749 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 235 transitions. [2021-11-09 09:38:21,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-09 09:38:21,752 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:38:21,752 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:38:21,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-09 09:38:21,753 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr55ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 51 more)] === [2021-11-09 09:38:21,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:38:21,753 INFO L85 PathProgramCache]: Analyzing trace with hash 1477836561, now seen corresponding path program 1 times [2021-11-09 09:38:21,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:38:21,754 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572023863] [2021-11-09 09:38:21,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:38:21,754 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:38:21,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:21,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:38:21,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:21,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:38:21,863 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:38:21,864 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572023863] [2021-11-09 09:38:21,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572023863] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:38:21,864 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:38:21,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 09:38:21,865 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292758714] [2021-11-09 09:38:21,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 09:38:21,865 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:38:21,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 09:38:21,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:38:21,867 INFO L87 Difference]: Start difference. First operand 176 states and 235 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:38:22,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:38:22,041 INFO L93 Difference]: Finished difference Result 190 states and 233 transitions. [2021-11-09 09:38:22,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 09:38:22,042 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-11-09 09:38:22,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:38:22,044 INFO L225 Difference]: With dead ends: 190 [2021-11-09 09:38:22,044 INFO L226 Difference]: Without dead ends: 190 [2021-11-09 09:38:22,044 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:38:22,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-11-09 09:38:22,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 176. [2021-11-09 09:38:22,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 137 states have (on average 1.6788321167883211) internal successors, (230), 172 states have internal predecessors, (230), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:38:22,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 233 transitions. [2021-11-09 09:38:22,071 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 233 transitions. Word has length 14 [2021-11-09 09:38:22,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:38:22,071 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 233 transitions. [2021-11-09 09:38:22,072 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:38:22,072 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 233 transitions. [2021-11-09 09:38:22,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-09 09:38:22,073 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:38:22,073 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:38:22,074 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-09 09:38:22,074 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr46REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 51 more)] === [2021-11-09 09:38:22,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:38:22,074 INFO L85 PathProgramCache]: Analyzing trace with hash 1082826400, now seen corresponding path program 1 times [2021-11-09 09:38:22,075 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:38:22,075 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21985672] [2021-11-09 09:38:22,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:38:22,075 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:38:22,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:22,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:38:22,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:22,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:38:22,171 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:38:22,171 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21985672] [2021-11-09 09:38:22,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21985672] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:38:22,171 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:38:22,172 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 09:38:22,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107014546] [2021-11-09 09:38:22,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 09:38:22,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:38:22,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 09:38:22,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:38:22,177 INFO L87 Difference]: Start difference. First operand 176 states and 233 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:38:22,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:38:22,356 INFO L93 Difference]: Finished difference Result 179 states and 236 transitions. [2021-11-09 09:38:22,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 09:38:22,357 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2021-11-09 09:38:22,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:38:22,359 INFO L225 Difference]: With dead ends: 179 [2021-11-09 09:38:22,359 INFO L226 Difference]: Without dead ends: 179 [2021-11-09 09:38:22,360 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:38:22,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-11-09 09:38:22,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2021-11-09 09:38:22,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 140 states have (on average 1.6642857142857144) internal successors, (233), 175 states have internal predecessors, (233), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:38:22,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 236 transitions. [2021-11-09 09:38:22,369 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 236 transitions. Word has length 18 [2021-11-09 09:38:22,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:38:22,369 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 236 transitions. [2021-11-09 09:38:22,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:38:22,370 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 236 transitions. [2021-11-09 09:38:22,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-09 09:38:22,372 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:38:22,372 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:38:22,372 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-09 09:38:22,373 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr4REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 51 more)] === [2021-11-09 09:38:22,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:38:22,373 INFO L85 PathProgramCache]: Analyzing trace with hash -464671652, now seen corresponding path program 1 times [2021-11-09 09:38:22,374 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:38:22,375 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518520037] [2021-11-09 09:38:22,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:38:22,380 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:38:22,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:22,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:38:22,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:22,481 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:38:22,482 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:38:22,483 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518520037] [2021-11-09 09:38:22,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518520037] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:38:22,484 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:38:22,484 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 09:38:22,484 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366587103] [2021-11-09 09:38:22,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 09:38:22,486 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:38:22,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 09:38:22,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:38:22,488 INFO L87 Difference]: Start difference. First operand 179 states and 236 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:38:22,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:38:22,664 INFO L93 Difference]: Finished difference Result 181 states and 238 transitions. [2021-11-09 09:38:22,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 09:38:22,667 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2021-11-09 09:38:22,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:38:22,669 INFO L225 Difference]: With dead ends: 181 [2021-11-09 09:38:22,669 INFO L226 Difference]: Without dead ends: 181 [2021-11-09 09:38:22,670 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:38:22,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-11-09 09:38:22,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2021-11-09 09:38:22,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 142 states have (on average 1.6549295774647887) internal successors, (235), 177 states have internal predecessors, (235), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:38:22,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 238 transitions. [2021-11-09 09:38:22,678 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 238 transitions. Word has length 18 [2021-11-09 09:38:22,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:38:22,679 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 238 transitions. [2021-11-09 09:38:22,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:38:22,680 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 238 transitions. [2021-11-09 09:38:22,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-09 09:38:22,681 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:38:22,681 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:38:22,681 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-09 09:38:22,682 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr46REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 51 more)] === [2021-11-09 09:38:22,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:38:22,682 INFO L85 PathProgramCache]: Analyzing trace with hash 1263994875, now seen corresponding path program 1 times [2021-11-09 09:38:22,683 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:38:22,683 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792887885] [2021-11-09 09:38:22,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:38:22,683 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:38:22,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:22,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:38:22,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:22,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:38:22,759 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:38:22,759 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792887885] [2021-11-09 09:38:22,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792887885] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:38:22,759 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:38:22,760 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 09:38:22,760 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892842090] [2021-11-09 09:38:22,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 09:38:22,761 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:38:22,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 09:38:22,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:38:22,762 INFO L87 Difference]: Start difference. First operand 181 states and 238 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:38:22,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:38:22,931 INFO L93 Difference]: Finished difference Result 196 states and 247 transitions. [2021-11-09 09:38:22,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 09:38:22,932 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2021-11-09 09:38:22,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:38:22,933 INFO L225 Difference]: With dead ends: 196 [2021-11-09 09:38:22,934 INFO L226 Difference]: Without dead ends: 196 [2021-11-09 09:38:22,934 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:38:22,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-11-09 09:38:22,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 183. [2021-11-09 09:38:22,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 144 states have (on average 1.625) internal successors, (234), 179 states have internal predecessors, (234), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:38:22,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 237 transitions. [2021-11-09 09:38:22,942 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 237 transitions. Word has length 20 [2021-11-09 09:38:22,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:38:22,942 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 237 transitions. [2021-11-09 09:38:22,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:38:22,943 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 237 transitions. [2021-11-09 09:38:22,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-09 09:38:22,944 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:38:22,944 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:38:22,944 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-09 09:38:22,945 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr4REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 51 more)] === [2021-11-09 09:38:22,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:38:22,945 INFO L85 PathProgramCache]: Analyzing trace with hash 1063863391, now seen corresponding path program 1 times [2021-11-09 09:38:22,946 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:38:22,946 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190292633] [2021-11-09 09:38:22,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:38:22,946 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:38:22,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:23,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:38:23,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:23,061 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:38:23,061 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:38:23,062 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190292633] [2021-11-09 09:38:23,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190292633] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:38:23,062 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:38:23,062 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-09 09:38:23,062 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090454523] [2021-11-09 09:38:23,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-09 09:38:23,063 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:38:23,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-09 09:38:23,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-09 09:38:23,064 INFO L87 Difference]: Start difference. First operand 183 states and 237 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:38:23,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:38:23,417 INFO L93 Difference]: Finished difference Result 278 states and 347 transitions. [2021-11-09 09:38:23,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-09 09:38:23,418 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2021-11-09 09:38:23,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:38:23,420 INFO L225 Difference]: With dead ends: 278 [2021-11-09 09:38:23,420 INFO L226 Difference]: Without dead ends: 278 [2021-11-09 09:38:23,420 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-11-09 09:38:23,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-11-09 09:38:23,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 197. [2021-11-09 09:38:23,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 158 states have (on average 1.6012658227848102) internal successors, (253), 193 states have internal predecessors, (253), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:38:23,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 256 transitions. [2021-11-09 09:38:23,427 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 256 transitions. Word has length 20 [2021-11-09 09:38:23,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:38:23,428 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 256 transitions. [2021-11-09 09:38:23,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:38:23,428 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 256 transitions. [2021-11-09 09:38:23,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-09 09:38:23,429 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:38:23,429 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:38:23,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-09 09:38:23,429 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr36REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 51 more)] === [2021-11-09 09:38:23,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:38:23,430 INFO L85 PathProgramCache]: Analyzing trace with hash -981522250, now seen corresponding path program 1 times [2021-11-09 09:38:23,430 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:38:23,430 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367508883] [2021-11-09 09:38:23,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:38:23,430 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:38:23,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:23,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:38:23,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:23,538 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:38:23,538 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:38:23,538 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367508883] [2021-11-09 09:38:23,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367508883] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:38:23,539 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:38:23,539 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-09 09:38:23,539 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066693768] [2021-11-09 09:38:23,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-09 09:38:23,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:38:23,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-09 09:38:23,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-09 09:38:23,541 INFO L87 Difference]: Start difference. First operand 197 states and 256 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:38:23,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:38:23,973 INFO L93 Difference]: Finished difference Result 277 states and 345 transitions. [2021-11-09 09:38:23,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-09 09:38:23,974 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2021-11-09 09:38:23,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:38:23,977 INFO L225 Difference]: With dead ends: 277 [2021-11-09 09:38:23,977 INFO L226 Difference]: Without dead ends: 277 [2021-11-09 09:38:23,977 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-11-09 09:38:23,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2021-11-09 09:38:23,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 232. [2021-11-09 09:38:23,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 193 states have (on average 1.6062176165803108) internal successors, (310), 228 states have internal predecessors, (310), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:38:23,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 313 transitions. [2021-11-09 09:38:23,988 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 313 transitions. Word has length 21 [2021-11-09 09:38:23,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:38:23,989 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 313 transitions. [2021-11-09 09:38:23,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:38:23,989 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 313 transitions. [2021-11-09 09:38:23,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-09 09:38:23,990 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:38:23,991 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:38:23,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-09 09:38:23,991 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr53ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 51 more)] === [2021-11-09 09:38:23,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:38:23,992 INFO L85 PathProgramCache]: Analyzing trace with hash 529152575, now seen corresponding path program 1 times [2021-11-09 09:38:23,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:38:23,992 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225802694] [2021-11-09 09:38:23,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:38:23,996 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:38:24,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:24,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:38:24,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:24,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:38:24,083 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:38:24,083 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225802694] [2021-11-09 09:38:24,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225802694] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:38:24,083 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:38:24,084 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 09:38:24,084 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229380767] [2021-11-09 09:38:24,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 09:38:24,084 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:38:24,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 09:38:24,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-09 09:38:24,085 INFO L87 Difference]: Start difference. First operand 232 states and 313 transitions. Second operand has 5 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:38:24,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:38:24,371 INFO L93 Difference]: Finished difference Result 270 states and 332 transitions. [2021-11-09 09:38:24,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 09:38:24,372 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2021-11-09 09:38:24,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:38:24,374 INFO L225 Difference]: With dead ends: 270 [2021-11-09 09:38:24,375 INFO L226 Difference]: Without dead ends: 270 [2021-11-09 09:38:24,375 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-09 09:38:24,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2021-11-09 09:38:24,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 233. [2021-11-09 09:38:24,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 194 states have (on average 1.6030927835051547) internal successors, (311), 229 states have internal predecessors, (311), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:38:24,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 314 transitions. [2021-11-09 09:38:24,385 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 314 transitions. Word has length 21 [2021-11-09 09:38:24,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:38:24,385 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 314 transitions. [2021-11-09 09:38:24,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:38:24,386 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 314 transitions. [2021-11-09 09:38:24,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-09 09:38:24,387 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:38:24,387 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:38:24,388 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-09 09:38:24,388 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr18REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 51 more)] === [2021-11-09 09:38:24,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:38:24,389 INFO L85 PathProgramCache]: Analyzing trace with hash 113585727, now seen corresponding path program 1 times [2021-11-09 09:38:24,389 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:38:24,389 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324709312] [2021-11-09 09:38:24,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:38:24,390 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:38:24,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:24,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:38:24,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:24,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:38:24,449 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:38:24,449 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324709312] [2021-11-09 09:38:24,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324709312] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:38:24,450 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:38:24,450 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 09:38:24,450 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888396284] [2021-11-09 09:38:24,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 09:38:24,451 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:38:24,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 09:38:24,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:38:24,452 INFO L87 Difference]: Start difference. First operand 233 states and 314 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:38:24,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:38:24,609 INFO L93 Difference]: Finished difference Result 236 states and 317 transitions. [2021-11-09 09:38:24,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 09:38:24,609 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2021-11-09 09:38:24,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:38:24,612 INFO L225 Difference]: With dead ends: 236 [2021-11-09 09:38:24,612 INFO L226 Difference]: Without dead ends: 236 [2021-11-09 09:38:24,612 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:38:24,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-11-09 09:38:24,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 236. [2021-11-09 09:38:24,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 197 states have (on average 1.5939086294416243) internal successors, (314), 232 states have internal predecessors, (314), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:38:24,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 317 transitions. [2021-11-09 09:38:24,621 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 317 transitions. Word has length 22 [2021-11-09 09:38:24,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:38:24,621 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 317 transitions. [2021-11-09 09:38:24,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:38:24,622 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 317 transitions. [2021-11-09 09:38:24,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-09 09:38:24,625 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:38:24,625 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:38:24,625 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-09 09:38:24,626 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr18REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 51 more)] === [2021-11-09 09:38:24,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:38:24,627 INFO L85 PathProgramCache]: Analyzing trace with hash 56327425, now seen corresponding path program 1 times [2021-11-09 09:38:24,627 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:38:24,627 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163734677] [2021-11-09 09:38:24,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:38:24,628 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:38:24,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:24,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:38:24,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:24,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:38:24,717 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:38:24,718 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163734677] [2021-11-09 09:38:24,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163734677] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:38:24,718 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:38:24,718 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-09 09:38:24,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588916302] [2021-11-09 09:38:24,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 09:38:24,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:38:24,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 09:38:24,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-09 09:38:24,721 INFO L87 Difference]: Start difference. First operand 236 states and 317 transitions. Second operand has 6 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:38:25,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:38:25,006 INFO L93 Difference]: Finished difference Result 235 states and 315 transitions. [2021-11-09 09:38:25,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-09 09:38:25,006 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2021-11-09 09:38:25,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:38:25,008 INFO L225 Difference]: With dead ends: 235 [2021-11-09 09:38:25,008 INFO L226 Difference]: Without dead ends: 235 [2021-11-09 09:38:25,009 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-09 09:38:25,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-11-09 09:38:25,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 235. [2021-11-09 09:38:25,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 197 states have (on average 1.583756345177665) internal successors, (312), 231 states have internal predecessors, (312), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:38:25,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 315 transitions. [2021-11-09 09:38:25,018 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 315 transitions. Word has length 22 [2021-11-09 09:38:25,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:38:25,018 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 315 transitions. [2021-11-09 09:38:25,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:38:25,019 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 315 transitions. [2021-11-09 09:38:25,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-09 09:38:25,020 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:38:25,021 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:38:25,021 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-09 09:38:25,021 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr19REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 51 more)] === [2021-11-09 09:38:25,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:38:25,022 INFO L85 PathProgramCache]: Analyzing trace with hash 56327426, now seen corresponding path program 1 times [2021-11-09 09:38:25,022 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:38:25,022 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493423001] [2021-11-09 09:38:25,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:38:25,022 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:38:25,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:25,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:38:25,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:25,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:38:25,136 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:38:25,136 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493423001] [2021-11-09 09:38:25,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493423001] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:38:25,137 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:38:25,137 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-09 09:38:25,137 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033554802] [2021-11-09 09:38:25,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 09:38:25,138 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:38:25,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 09:38:25,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-09 09:38:25,139 INFO L87 Difference]: Start difference. First operand 235 states and 315 transitions. Second operand has 6 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:38:25,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:38:25,462 INFO L93 Difference]: Finished difference Result 234 states and 313 transitions. [2021-11-09 09:38:25,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-09 09:38:25,463 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2021-11-09 09:38:25,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:38:25,465 INFO L225 Difference]: With dead ends: 234 [2021-11-09 09:38:25,465 INFO L226 Difference]: Without dead ends: 234 [2021-11-09 09:38:25,465 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-09 09:38:25,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-11-09 09:38:25,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 234. [2021-11-09 09:38:25,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 197 states have (on average 1.5736040609137056) internal successors, (310), 230 states have internal predecessors, (310), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:38:25,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 313 transitions. [2021-11-09 09:38:25,476 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 313 transitions. Word has length 22 [2021-11-09 09:38:25,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:38:25,477 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 313 transitions. [2021-11-09 09:38:25,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:38:25,477 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 313 transitions. [2021-11-09 09:38:25,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-09 09:38:25,485 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:38:25,487 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:38:25,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-09 09:38:25,487 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr36REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 51 more)] === [2021-11-09 09:38:25,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:38:25,488 INFO L85 PathProgramCache]: Analyzing trace with hash 1729592699, now seen corresponding path program 1 times [2021-11-09 09:38:25,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:38:25,489 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62159066] [2021-11-09 09:38:25,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:38:25,489 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:38:25,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:25,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:38:25,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:25,619 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:38:25,619 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:38:25,620 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62159066] [2021-11-09 09:38:25,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62159066] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:38:25,620 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:38:25,620 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-09 09:38:25,621 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694987689] [2021-11-09 09:38:25,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-09 09:38:25,623 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:38:25,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-09 09:38:25,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-09 09:38:25,624 INFO L87 Difference]: Start difference. First operand 234 states and 313 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:38:25,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:38:25,990 INFO L93 Difference]: Finished difference Result 250 states and 332 transitions. [2021-11-09 09:38:25,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-09 09:38:25,990 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2021-11-09 09:38:25,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:38:25,992 INFO L225 Difference]: With dead ends: 250 [2021-11-09 09:38:25,992 INFO L226 Difference]: Without dead ends: 250 [2021-11-09 09:38:25,993 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-11-09 09:38:25,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-11-09 09:38:25,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 241. [2021-11-09 09:38:25,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 204 states have (on average 1.5637254901960784) internal successors, (319), 237 states have internal predecessors, (319), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:38:26,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 322 transitions. [2021-11-09 09:38:26,001 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 322 transitions. Word has length 23 [2021-11-09 09:38:26,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:38:26,001 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 322 transitions. [2021-11-09 09:38:26,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:38:26,002 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 322 transitions. [2021-11-09 09:38:26,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-09 09:38:26,002 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:38:26,002 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:38:26,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-09 09:38:26,003 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr36REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 51 more)] === [2021-11-09 09:38:26,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:38:26,004 INFO L85 PathProgramCache]: Analyzing trace with hash 1729777397, now seen corresponding path program 1 times [2021-11-09 09:38:26,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:38:26,004 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605336679] [2021-11-09 09:38:26,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:38:26,005 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:38:26,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:26,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:38:26,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:26,180 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:38:26,180 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:38:26,183 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605336679] [2021-11-09 09:38:26,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605336679] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:38:26,186 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:38:26,186 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-09 09:38:26,187 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033858246] [2021-11-09 09:38:26,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-09 09:38:26,187 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:38:26,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-09 09:38:26,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-09 09:38:26,189 INFO L87 Difference]: Start difference. First operand 241 states and 322 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:38:26,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:38:26,833 INFO L93 Difference]: Finished difference Result 348 states and 432 transitions. [2021-11-09 09:38:26,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-09 09:38:26,834 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2021-11-09 09:38:26,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:38:26,837 INFO L225 Difference]: With dead ends: 348 [2021-11-09 09:38:26,837 INFO L226 Difference]: Without dead ends: 348 [2021-11-09 09:38:26,838 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-11-09 09:38:26,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-11-09 09:38:26,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 298. [2021-11-09 09:38:26,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 261 states have (on average 1.5363984674329503) internal successors, (401), 294 states have internal predecessors, (401), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:38:26,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 404 transitions. [2021-11-09 09:38:26,853 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 404 transitions. Word has length 23 [2021-11-09 09:38:26,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:38:26,854 INFO L470 AbstractCegarLoop]: Abstraction has 298 states and 404 transitions. [2021-11-09 09:38:26,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:38:26,854 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 404 transitions. [2021-11-09 09:38:26,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-09 09:38:26,855 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:38:26,855 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:38:26,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-09 09:38:26,855 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr36REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 51 more)] === [2021-11-09 09:38:26,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:38:26,858 INFO L85 PathProgramCache]: Analyzing trace with hash 1454633508, now seen corresponding path program 1 times [2021-11-09 09:38:26,858 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:38:26,858 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284418451] [2021-11-09 09:38:26,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:38:26,859 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:38:26,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:26,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:38:26,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:26,929 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:38:26,929 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:38:26,929 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284418451] [2021-11-09 09:38:26,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284418451] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:38:26,930 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:38:26,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 09:38:26,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88435932] [2021-11-09 09:38:26,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 09:38:26,931 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:38:26,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 09:38:26,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:38:26,935 INFO L87 Difference]: Start difference. First operand 298 states and 404 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:38:27,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:38:27,093 INFO L93 Difference]: Finished difference Result 273 states and 353 transitions. [2021-11-09 09:38:27,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 09:38:27,093 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2021-11-09 09:38:27,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:38:27,095 INFO L225 Difference]: With dead ends: 273 [2021-11-09 09:38:27,096 INFO L226 Difference]: Without dead ends: 273 [2021-11-09 09:38:27,096 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:38:27,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2021-11-09 09:38:27,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 271. [2021-11-09 09:38:27,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 234 states have (on average 1.4957264957264957) internal successors, (350), 267 states have internal predecessors, (350), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:38:27,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 353 transitions. [2021-11-09 09:38:27,105 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 353 transitions. Word has length 24 [2021-11-09 09:38:27,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:38:27,106 INFO L470 AbstractCegarLoop]: Abstraction has 271 states and 353 transitions. [2021-11-09 09:38:27,106 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:38:27,106 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 353 transitions. [2021-11-09 09:38:27,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-09 09:38:27,107 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:38:27,107 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:38:27,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-09 09:38:27,107 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr55ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 51 more)] === [2021-11-09 09:38:27,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:38:27,108 INFO L85 PathProgramCache]: Analyzing trace with hash 2143966202, now seen corresponding path program 1 times [2021-11-09 09:38:27,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:38:27,108 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884442013] [2021-11-09 09:38:27,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:38:27,108 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:38:27,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:27,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:38:27,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:27,208 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:38:27,208 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:38:27,208 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884442013] [2021-11-09 09:38:27,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884442013] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:38:27,209 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881526164] [2021-11-09 09:38:27,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:38:27,209 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:38:27,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b50a12a-cd1e-4684-9ccb-93d7319de555/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:38:27,212 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b50a12a-cd1e-4684-9ccb-93d7319de555/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:38:27,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b50a12a-cd1e-4684-9ccb-93d7319de555/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-09 09:38:27,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:27,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-09 09:38:27,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:38:27,751 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:38:27,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881526164] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:38:27,752 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:38:27,752 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-11-09 09:38:27,752 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282401220] [2021-11-09 09:38:27,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-09 09:38:27,755 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:38:27,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-09 09:38:27,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-09 09:38:27,756 INFO L87 Difference]: Start difference. First operand 271 states and 353 transitions. Second operand has 9 states, 8 states have (on average 5.375) internal successors, (43), 8 states have internal predecessors, (43), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:38:28,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:38:28,013 INFO L93 Difference]: Finished difference Result 284 states and 366 transitions. [2021-11-09 09:38:28,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-09 09:38:28,013 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 5.375) internal successors, (43), 8 states have internal predecessors, (43), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2021-11-09 09:38:28,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:38:28,015 INFO L225 Difference]: With dead ends: 284 [2021-11-09 09:38:28,015 INFO L226 Difference]: Without dead ends: 268 [2021-11-09 09:38:28,016 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-11-09 09:38:28,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2021-11-09 09:38:28,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 266. [2021-11-09 09:38:28,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 229 states have (on average 1.502183406113537) internal successors, (344), 262 states have internal predecessors, (344), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:38:28,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 347 transitions. [2021-11-09 09:38:28,025 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 347 transitions. Word has length 25 [2021-11-09 09:38:28,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:38:28,025 INFO L470 AbstractCegarLoop]: Abstraction has 266 states and 347 transitions. [2021-11-09 09:38:28,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 5.375) internal successors, (43), 8 states have internal predecessors, (43), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:38:28,026 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 347 transitions. [2021-11-09 09:38:28,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-09 09:38:28,026 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:38:28,027 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:38:28,067 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b50a12a-cd1e-4684-9ccb-93d7319de555/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-09 09:38:28,249 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b50a12a-cd1e-4684-9ccb-93d7319de555/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-09 09:38:28,250 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr22REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 51 more)] === [2021-11-09 09:38:28,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:38:28,250 INFO L85 PathProgramCache]: Analyzing trace with hash -1281829981, now seen corresponding path program 1 times [2021-11-09 09:38:28,250 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:38:28,251 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946789470] [2021-11-09 09:38:28,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:38:28,251 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:38:28,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:28,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:38:28,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:28,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:38:28,391 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:38:28,391 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946789470] [2021-11-09 09:38:28,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946789470] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:38:28,392 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:38:28,392 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-09 09:38:28,392 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285967653] [2021-11-09 09:38:28,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-09 09:38:28,394 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:38:28,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-09 09:38:28,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-11-09 09:38:28,395 INFO L87 Difference]: Start difference. First operand 266 states and 347 transitions. Second operand has 9 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:38:28,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:38:28,846 INFO L93 Difference]: Finished difference Result 267 states and 346 transitions. [2021-11-09 09:38:28,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-09 09:38:28,847 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2021-11-09 09:38:28,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:38:28,850 INFO L225 Difference]: With dead ends: 267 [2021-11-09 09:38:28,850 INFO L226 Difference]: Without dead ends: 267 [2021-11-09 09:38:28,850 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-11-09 09:38:28,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2021-11-09 09:38:28,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 265. [2021-11-09 09:38:28,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 229 states have (on average 1.4890829694323144) internal successors, (341), 261 states have internal predecessors, (341), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:38:28,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 344 transitions. [2021-11-09 09:38:28,862 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 344 transitions. Word has length 25 [2021-11-09 09:38:28,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:38:28,863 INFO L470 AbstractCegarLoop]: Abstraction has 265 states and 344 transitions. [2021-11-09 09:38:28,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:38:28,863 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 344 transitions. [2021-11-09 09:38:28,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-09 09:38:28,864 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:38:28,865 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:38:28,865 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-09 09:38:28,865 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr23REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 51 more)] === [2021-11-09 09:38:28,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:38:28,866 INFO L85 PathProgramCache]: Analyzing trace with hash -1281829980, now seen corresponding path program 1 times [2021-11-09 09:38:28,866 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:38:28,866 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227164419] [2021-11-09 09:38:28,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:38:28,867 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:38:28,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:29,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:38:29,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:29,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:38:29,081 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:38:29,081 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227164419] [2021-11-09 09:38:29,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227164419] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:38:29,081 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:38:29,082 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-09 09:38:29,082 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429619880] [2021-11-09 09:38:29,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-09 09:38:29,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:38:29,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-09 09:38:29,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-11-09 09:38:29,084 INFO L87 Difference]: Start difference. First operand 265 states and 344 transitions. Second operand has 9 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:38:29,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:38:29,784 INFO L93 Difference]: Finished difference Result 266 states and 343 transitions. [2021-11-09 09:38:29,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-09 09:38:29,785 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2021-11-09 09:38:29,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:38:29,788 INFO L225 Difference]: With dead ends: 266 [2021-11-09 09:38:29,788 INFO L226 Difference]: Without dead ends: 266 [2021-11-09 09:38:29,788 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-11-09 09:38:29,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-11-09 09:38:29,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 264. [2021-11-09 09:38:29,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 229 states have (on average 1.4759825327510918) internal successors, (338), 260 states have internal predecessors, (338), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:38:29,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 341 transitions. [2021-11-09 09:38:29,801 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 341 transitions. Word has length 25 [2021-11-09 09:38:29,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:38:29,801 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 341 transitions. [2021-11-09 09:38:29,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:38:29,802 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 341 transitions. [2021-11-09 09:38:29,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-09 09:38:29,802 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:38:29,803 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:38:29,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-09 09:38:29,803 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr31REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 51 more)] === [2021-11-09 09:38:29,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:38:29,804 INFO L85 PathProgramCache]: Analyzing trace with hash 1115807965, now seen corresponding path program 1 times [2021-11-09 09:38:29,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:38:29,804 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551769749] [2021-11-09 09:38:29,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:38:29,805 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:38:29,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:29,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:38:29,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:29,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:38:29,935 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:38:29,936 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551769749] [2021-11-09 09:38:29,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551769749] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:38:29,936 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:38:29,936 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-09 09:38:29,936 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207417729] [2021-11-09 09:38:29,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-09 09:38:29,937 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:38:29,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-09 09:38:29,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-09 09:38:29,938 INFO L87 Difference]: Start difference. First operand 264 states and 341 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:38:30,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:38:30,377 INFO L93 Difference]: Finished difference Result 330 states and 424 transitions. [2021-11-09 09:38:30,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-09 09:38:30,378 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2021-11-09 09:38:30,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:38:30,380 INFO L225 Difference]: With dead ends: 330 [2021-11-09 09:38:30,381 INFO L226 Difference]: Without dead ends: 330 [2021-11-09 09:38:30,381 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-11-09 09:38:30,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2021-11-09 09:38:30,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 275. [2021-11-09 09:38:30,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 240 states have (on average 1.4583333333333333) internal successors, (350), 271 states have internal predecessors, (350), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:38:30,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 353 transitions. [2021-11-09 09:38:30,394 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 353 transitions. Word has length 26 [2021-11-09 09:38:30,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:38:30,394 INFO L470 AbstractCegarLoop]: Abstraction has 275 states and 353 transitions. [2021-11-09 09:38:30,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:38:30,395 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 353 transitions. [2021-11-09 09:38:30,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-09 09:38:30,396 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:38:30,396 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:38:30,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-09 09:38:30,396 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr31REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 51 more)] === [2021-11-09 09:38:30,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:38:30,397 INFO L85 PathProgramCache]: Analyzing trace with hash 1508834975, now seen corresponding path program 1 times [2021-11-09 09:38:30,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:38:30,398 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509315141] [2021-11-09 09:38:30,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:38:30,398 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:38:30,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:30,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:38:30,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:30,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:38:30,499 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:38:30,499 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509315141] [2021-11-09 09:38:30,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509315141] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:38:30,500 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:38:30,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-09 09:38:30,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918112850] [2021-11-09 09:38:30,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 09:38:30,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:38:30,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 09:38:30,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-09 09:38:30,502 INFO L87 Difference]: Start difference. First operand 275 states and 353 transitions. Second operand has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:38:30,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:38:30,851 INFO L93 Difference]: Finished difference Result 274 states and 351 transitions. [2021-11-09 09:38:30,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-09 09:38:30,851 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2021-11-09 09:38:30,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:38:30,854 INFO L225 Difference]: With dead ends: 274 [2021-11-09 09:38:30,854 INFO L226 Difference]: Without dead ends: 274 [2021-11-09 09:38:30,854 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-09 09:38:30,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2021-11-09 09:38:30,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 274. [2021-11-09 09:38:30,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 240 states have (on average 1.45) internal successors, (348), 270 states have internal predecessors, (348), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:38:30,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 351 transitions. [2021-11-09 09:38:30,866 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 351 transitions. Word has length 26 [2021-11-09 09:38:30,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:38:30,867 INFO L470 AbstractCegarLoop]: Abstraction has 274 states and 351 transitions. [2021-11-09 09:38:30,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:38:30,867 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 351 transitions. [2021-11-09 09:38:30,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-09 09:38:30,868 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:38:30,868 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:38:30,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-09 09:38:30,869 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr30REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 51 more)] === [2021-11-09 09:38:30,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:38:30,869 INFO L85 PathProgramCache]: Analyzing trace with hash 1508834974, now seen corresponding path program 1 times [2021-11-09 09:38:30,870 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:38:30,870 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235632527] [2021-11-09 09:38:30,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:38:30,870 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:38:30,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:30,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:38:30,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:30,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:38:30,960 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:38:30,960 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235632527] [2021-11-09 09:38:30,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235632527] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:38:30,960 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:38:30,960 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-09 09:38:30,962 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592157498] [2021-11-09 09:38:30,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 09:38:30,963 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:38:30,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 09:38:30,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-09 09:38:30,965 INFO L87 Difference]: Start difference. First operand 274 states and 351 transitions. Second operand has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:38:31,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:38:31,270 INFO L93 Difference]: Finished difference Result 273 states and 349 transitions. [2021-11-09 09:38:31,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-09 09:38:31,271 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2021-11-09 09:38:31,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:38:31,273 INFO L225 Difference]: With dead ends: 273 [2021-11-09 09:38:31,274 INFO L226 Difference]: Without dead ends: 273 [2021-11-09 09:38:31,274 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-09 09:38:31,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2021-11-09 09:38:31,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 273. [2021-11-09 09:38:31,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 240 states have (on average 1.4416666666666667) internal successors, (346), 269 states have internal predecessors, (346), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:38:31,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 349 transitions. [2021-11-09 09:38:31,286 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 349 transitions. Word has length 26 [2021-11-09 09:38:31,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:38:31,286 INFO L470 AbstractCegarLoop]: Abstraction has 273 states and 349 transitions. [2021-11-09 09:38:31,286 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:38:31,287 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 349 transitions. [2021-11-09 09:38:31,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-09 09:38:31,287 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:38:31,287 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:38:31,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-09 09:38:31,288 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr34REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 51 more)] === [2021-11-09 09:38:31,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:38:31,288 INFO L85 PathProgramCache]: Analyzing trace with hash -1424911160, now seen corresponding path program 1 times [2021-11-09 09:38:31,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:38:31,289 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850926891] [2021-11-09 09:38:31,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:38:31,289 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:38:31,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:31,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:38:31,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:31,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:38:31,445 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:38:31,445 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850926891] [2021-11-09 09:38:31,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850926891] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:38:31,446 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:38:31,446 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-09 09:38:31,446 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230681101] [2021-11-09 09:38:31,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-09 09:38:31,447 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:38:31,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-09 09:38:31,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-11-09 09:38:31,448 INFO L87 Difference]: Start difference. First operand 273 states and 349 transitions. Second operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:38:31,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:38:31,899 INFO L93 Difference]: Finished difference Result 274 states and 350 transitions. [2021-11-09 09:38:31,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-09 09:38:31,900 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2021-11-09 09:38:31,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:38:31,902 INFO L225 Difference]: With dead ends: 274 [2021-11-09 09:38:31,902 INFO L226 Difference]: Without dead ends: 274 [2021-11-09 09:38:31,903 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-11-09 09:38:31,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2021-11-09 09:38:31,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 272. [2021-11-09 09:38:31,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 240 states have (on average 1.4375) internal successors, (345), 268 states have internal predecessors, (345), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:38:31,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 348 transitions. [2021-11-09 09:38:31,914 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 348 transitions. Word has length 29 [2021-11-09 09:38:31,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:38:31,915 INFO L470 AbstractCegarLoop]: Abstraction has 272 states and 348 transitions. [2021-11-09 09:38:31,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:38:31,915 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 348 transitions. [2021-11-09 09:38:31,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-09 09:38:31,916 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:38:31,916 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:38:31,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-11-09 09:38:31,917 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting mainErr35REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 51 more)] === [2021-11-09 09:38:31,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:38:31,917 INFO L85 PathProgramCache]: Analyzing trace with hash -1424911159, now seen corresponding path program 1 times [2021-11-09 09:38:31,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:38:31,918 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246109992] [2021-11-09 09:38:31,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:38:31,918 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:38:31,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:32,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:38:32,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:32,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:38:32,126 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:38:32,126 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246109992] [2021-11-09 09:38:32,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246109992] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:38:32,127 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:38:32,127 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-09 09:38:32,127 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150663867] [2021-11-09 09:38:32,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-09 09:38:32,128 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:38:32,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-09 09:38:32,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-11-09 09:38:32,130 INFO L87 Difference]: Start difference. First operand 272 states and 348 transitions. Second operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:38:32,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:38:32,841 INFO L93 Difference]: Finished difference Result 273 states and 349 transitions. [2021-11-09 09:38:32,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-09 09:38:32,842 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2021-11-09 09:38:32,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:38:32,844 INFO L225 Difference]: With dead ends: 273 [2021-11-09 09:38:32,844 INFO L226 Difference]: Without dead ends: 273 [2021-11-09 09:38:32,845 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-11-09 09:38:32,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2021-11-09 09:38:32,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 271. [2021-11-09 09:38:32,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 240 states have (on average 1.4333333333333333) internal successors, (344), 267 states have internal predecessors, (344), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:38:32,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 347 transitions. [2021-11-09 09:38:32,864 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 347 transitions. Word has length 29 [2021-11-09 09:38:32,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:38:32,864 INFO L470 AbstractCegarLoop]: Abstraction has 271 states and 347 transitions. [2021-11-09 09:38:32,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:38:32,865 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 347 transitions. [2021-11-09 09:38:32,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-09 09:38:32,866 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:38:32,867 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:38:32,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-11-09 09:38:32,867 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting mainErr4REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 51 more)] === [2021-11-09 09:38:32,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:38:32,868 INFO L85 PathProgramCache]: Analyzing trace with hash -1058002085, now seen corresponding path program 1 times [2021-11-09 09:38:32,868 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:38:32,868 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923595273] [2021-11-09 09:38:32,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:38:32,869 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:38:32,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:33,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:38:33,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:33,210 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:38:33,211 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:38:33,211 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923595273] [2021-11-09 09:38:33,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923595273] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:38:33,211 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109718547] [2021-11-09 09:38:33,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:38:33,213 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:38:33,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b50a12a-cd1e-4684-9ccb-93d7319de555/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:38:33,214 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b50a12a-cd1e-4684-9ccb-93d7319de555/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:38:33,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b50a12a-cd1e-4684-9ccb-93d7319de555/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-09 09:38:33,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:33,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-09 09:38:33,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:38:33,709 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-09 09:38:33,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-09 09:38:33,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-09 09:38:33,941 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-09 09:38:33,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 22 [2021-11-09 09:38:34,175 INFO L354 Elim1Store]: treesize reduction 60, result has 20.0 percent of original size [2021-11-09 09:38:34,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 39 [2021-11-09 09:38:34,641 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-09 09:38:34,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 19 [2021-11-09 09:38:34,651 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:38:34,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109718547] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:38:34,653 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:38:34,653 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-11-09 09:38:34,653 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161527325] [2021-11-09 09:38:34,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-09 09:38:34,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:38:34,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-09 09:38:34,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2021-11-09 09:38:34,656 INFO L87 Difference]: Start difference. First operand 271 states and 347 transitions. Second operand has 24 states, 23 states have (on average 3.260869565217391) internal successors, (75), 23 states have internal predecessors, (75), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:39:29,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:39:29,761 INFO L93 Difference]: Finished difference Result 456 states and 579 transitions. [2021-11-09 09:39:29,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-09 09:39:29,762 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 3.260869565217391) internal successors, (75), 23 states have internal predecessors, (75), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2021-11-09 09:39:29,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:39:29,766 INFO L225 Difference]: With dead ends: 456 [2021-11-09 09:39:29,766 INFO L226 Difference]: Without dead ends: 456 [2021-11-09 09:39:29,767 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 45.3s TimeCoverageRelationStatistics Valid=346, Invalid=1192, Unknown=22, NotChecked=0, Total=1560 [2021-11-09 09:39:29,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2021-11-09 09:39:29,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 323. [2021-11-09 09:39:29,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 292 states have (on average 1.4417808219178083) internal successors, (421), 319 states have internal predecessors, (421), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:39:29,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 424 transitions. [2021-11-09 09:39:29,783 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 424 transitions. Word has length 42 [2021-11-09 09:39:29,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:39:29,783 INFO L470 AbstractCegarLoop]: Abstraction has 323 states and 424 transitions. [2021-11-09 09:39:29,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 3.260869565217391) internal successors, (75), 23 states have internal predecessors, (75), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:39:29,784 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 424 transitions. [2021-11-09 09:39:29,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-09 09:39:29,785 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:39:29,785 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:39:29,828 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b50a12a-cd1e-4684-9ccb-93d7319de555/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-09 09:39:30,011 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b50a12a-cd1e-4684-9ccb-93d7319de555/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:39:30,011 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting mainErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 51 more)] === [2021-11-09 09:39:30,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:39:30,012 INFO L85 PathProgramCache]: Analyzing trace with hash -1058002084, now seen corresponding path program 1 times [2021-11-09 09:39:30,012 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:39:30,012 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309789830] [2021-11-09 09:39:30,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:39:30,013 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:39:30,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:39:30,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:39:30,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:39:30,482 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:39:30,482 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:39:30,482 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309789830] [2021-11-09 09:39:30,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309789830] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:39:30,482 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611853744] [2021-11-09 09:39:30,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:39:30,483 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:39:30,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b50a12a-cd1e-4684-9ccb-93d7319de555/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:39:30,484 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b50a12a-cd1e-4684-9ccb-93d7319de555/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:39:30,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b50a12a-cd1e-4684-9ccb-93d7319de555/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-09 09:39:30,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:39:30,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-09 09:39:30,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:39:31,073 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-09 09:39:31,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-09 09:39:31,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-09 09:39:31,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-09 09:39:31,360 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-09 09:39:31,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 40 [2021-11-09 09:39:31,379 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-11-09 09:39:31,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 41 [2021-11-09 09:39:31,715 INFO L354 Elim1Store]: treesize reduction 60, result has 20.0 percent of original size [2021-11-09 09:39:31,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 98 treesize of output 75 [2021-11-09 09:39:31,749 INFO L354 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2021-11-09 09:39:31,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 90 treesize of output 84 [2021-11-09 09:39:32,666 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-09 09:39:32,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 74 treesize of output 51 [2021-11-09 09:39:32,679 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-09 09:39:32,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 24 [2021-11-09 09:39:32,778 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:39:32,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611853744] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:39:32,779 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:39:32,779 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-11-09 09:39:32,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155517613] [2021-11-09 09:39:32,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-09 09:39:32,780 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:39:32,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-09 09:39:32,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2021-11-09 09:39:32,782 INFO L87 Difference]: Start difference. First operand 323 states and 424 transitions. Second operand has 26 states, 25 states have (on average 3.08) internal successors, (77), 25 states have internal predecessors, (77), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:39:37,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:39:37,329 INFO L93 Difference]: Finished difference Result 594 states and 741 transitions. [2021-11-09 09:39:37,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-09 09:39:37,329 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 3.08) internal successors, (77), 25 states have internal predecessors, (77), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2021-11-09 09:39:37,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:39:37,333 INFO L225 Difference]: With dead ends: 594 [2021-11-09 09:39:37,333 INFO L226 Difference]: Without dead ends: 594 [2021-11-09 09:39:37,335 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=581, Invalid=2389, Unknown=0, NotChecked=0, Total=2970 [2021-11-09 09:39:37,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2021-11-09 09:39:37,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 361. [2021-11-09 09:39:37,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 330 states have (on average 1.415151515151515) internal successors, (467), 357 states have internal predecessors, (467), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:39:37,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 470 transitions. [2021-11-09 09:39:37,352 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 470 transitions. Word has length 42 [2021-11-09 09:39:37,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:39:37,352 INFO L470 AbstractCegarLoop]: Abstraction has 361 states and 470 transitions. [2021-11-09 09:39:37,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 3.08) internal successors, (77), 25 states have internal predecessors, (77), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:39:37,353 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 470 transitions. [2021-11-09 09:39:37,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-09 09:39:37,354 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:39:37,354 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:39:37,400 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b50a12a-cd1e-4684-9ccb-93d7319de555/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-09 09:39:37,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b50a12a-cd1e-4684-9ccb-93d7319de555/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-09 09:39:37,576 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting mainErr4REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 51 more)] === [2021-11-09 09:39:37,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:39:37,577 INFO L85 PathProgramCache]: Analyzing trace with hash -1057817387, now seen corresponding path program 1 times [2021-11-09 09:39:37,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:39:37,577 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546522127] [2021-11-09 09:39:37,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:39:37,577 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:39:37,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:39:37,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:39:37,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:39:37,892 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:39:37,893 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:39:37,893 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546522127] [2021-11-09 09:39:37,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546522127] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:39:37,893 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960032275] [2021-11-09 09:39:37,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:39:37,894 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:39:37,894 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b50a12a-cd1e-4684-9ccb-93d7319de555/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:39:37,895 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b50a12a-cd1e-4684-9ccb-93d7319de555/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:39:37,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b50a12a-cd1e-4684-9ccb-93d7319de555/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-09 09:39:38,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:39:38,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-09 09:39:38,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:39:38,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-11-09 09:39:38,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2021-11-09 09:39:38,931 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:39:38,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960032275] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:39:38,932 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:39:38,932 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 17 [2021-11-09 09:39:38,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702992718] [2021-11-09 09:39:38,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-09 09:39:38,933 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:39:38,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-09 09:39:38,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-11-09 09:39:38,934 INFO L87 Difference]: Start difference. First operand 361 states and 470 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:39:39,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:39:39,844 INFO L93 Difference]: Finished difference Result 472 states and 584 transitions. [2021-11-09 09:39:39,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-09 09:39:39,845 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2021-11-09 09:39:39,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:39:39,848 INFO L225 Difference]: With dead ends: 472 [2021-11-09 09:39:39,848 INFO L226 Difference]: Without dead ends: 472 [2021-11-09 09:39:39,848 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=190, Invalid=622, Unknown=0, NotChecked=0, Total=812 [2021-11-09 09:39:39,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2021-11-09 09:39:39,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 353. [2021-11-09 09:39:39,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 322 states have (on average 1.3726708074534162) internal successors, (442), 349 states have internal predecessors, (442), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:39:39,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 445 transitions. [2021-11-09 09:39:39,860 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 445 transitions. Word has length 42 [2021-11-09 09:39:39,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:39:39,860 INFO L470 AbstractCegarLoop]: Abstraction has 353 states and 445 transitions. [2021-11-09 09:39:39,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:39:39,861 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 445 transitions. [2021-11-09 09:39:39,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-09 09:39:39,861 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:39:39,861 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:39:39,900 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b50a12a-cd1e-4684-9ccb-93d7319de555/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-09 09:39:40,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b50a12a-cd1e-4684-9ccb-93d7319de555/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-09 09:39:40,087 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting mainErr4REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 51 more)] === [2021-11-09 09:39:40,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:39:40,088 INFO L85 PathProgramCache]: Analyzing trace with hash 433019483, now seen corresponding path program 1 times [2021-11-09 09:39:40,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:39:40,088 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777714837] [2021-11-09 09:39:40,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:39:40,088 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:39:40,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:39:40,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:39:40,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:39:40,601 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:39:40,601 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:39:40,601 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777714837] [2021-11-09 09:39:40,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777714837] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:39:40,602 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494881513] [2021-11-09 09:39:40,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:39:40,602 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:39:40,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b50a12a-cd1e-4684-9ccb-93d7319de555/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:39:40,607 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b50a12a-cd1e-4684-9ccb-93d7319de555/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:39:40,629 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b50a12a-cd1e-4684-9ccb-93d7319de555/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-09 09:39:40,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:39:40,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-09 09:39:40,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:39:41,696 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-09 09:39:41,697 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 [2021-11-09 09:39:41,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:39:41,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-09 09:39:41,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:39:41,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2021-11-09 09:39:42,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:39:42,211 INFO L354 Elim1Store]: treesize reduction 54, result has 23.9 percent of original size [2021-11-09 09:39:42,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 91 treesize of output 66 [2021-11-09 09:39:42,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:39:42,252 INFO L354 Elim1Store]: treesize reduction 78, result has 17.9 percent of original size [2021-11-09 09:39:42,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 81 treesize of output 77 [2021-11-09 09:39:42,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:39:42,685 INFO L354 Elim1Store]: treesize reduction 108, result has 18.2 percent of original size [2021-11-09 09:39:42,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 121 treesize of output 87 [2021-11-09 09:39:42,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:39:42,755 INFO L354 Elim1Store]: treesize reduction 150, result has 16.7 percent of original size [2021-11-09 09:39:42,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 111 treesize of output 110 [2021-11-09 09:39:49,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 26 [2021-11-09 09:39:49,414 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:39:49,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494881513] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:39:49,415 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:39:49,415 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 19] total 32 [2021-11-09 09:39:49,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505729099] [2021-11-09 09:39:49,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-09 09:39:49,416 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:39:49,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-09 09:39:49,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=811, Unknown=3, NotChecked=0, Total=992 [2021-11-09 09:39:49,417 INFO L87 Difference]: Start difference. First operand 353 states and 445 transitions. Second operand has 32 states, 32 states have (on average 2.1875) internal successors, (70), 31 states have internal predecessors, (70), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:40:17,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:40:17,110 INFO L93 Difference]: Finished difference Result 620 states and 776 transitions. [2021-11-09 09:40:17,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-09 09:40:17,111 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.1875) internal successors, (70), 31 states have internal predecessors, (70), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2021-11-09 09:40:17,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:40:17,115 INFO L225 Difference]: With dead ends: 620 [2021-11-09 09:40:17,115 INFO L226 Difference]: Without dead ends: 620 [2021-11-09 09:40:17,117 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 635 ImplicationChecksByTransitivity, 24.6s TimeCoverageRelationStatistics Valid=561, Invalid=2079, Unknown=12, NotChecked=0, Total=2652 [2021-11-09 09:40:17,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 620 states. [2021-11-09 09:40:17,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 620 to 387. [2021-11-09 09:40:17,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 356 states have (on average 1.3651685393258426) internal successors, (486), 383 states have internal predecessors, (486), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:40:17,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 489 transitions. [2021-11-09 09:40:17,131 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 489 transitions. Word has length 42 [2021-11-09 09:40:17,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:40:17,132 INFO L470 AbstractCegarLoop]: Abstraction has 387 states and 489 transitions. [2021-11-09 09:40:17,132 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.1875) internal successors, (70), 31 states have internal predecessors, (70), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:40:17,132 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 489 transitions. [2021-11-09 09:40:17,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-09 09:40:17,133 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:40:17,133 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:40:17,183 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b50a12a-cd1e-4684-9ccb-93d7319de555/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-09 09:40:17,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b50a12a-cd1e-4684-9ccb-93d7319de555/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-09 09:40:17,347 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting mainErr36REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 51 more)] === [2021-11-09 09:40:17,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:40:17,348 INFO L85 PathProgramCache]: Analyzing trace with hash 1960124730, now seen corresponding path program 1 times [2021-11-09 09:40:17,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:40:17,348 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431155267] [2021-11-09 09:40:17,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:40:17,348 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:40:17,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:17,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:40:17,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:17,656 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:40:17,657 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:40:17,657 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431155267] [2021-11-09 09:40:17,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431155267] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:40:17,657 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165247533] [2021-11-09 09:40:17,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:40:17,657 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:40:17,658 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b50a12a-cd1e-4684-9ccb-93d7319de555/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:40:17,671 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b50a12a-cd1e-4684-9ccb-93d7319de555/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:40:17,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b50a12a-cd1e-4684-9ccb-93d7319de555/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-09 09:40:18,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:18,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-09 09:40:18,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:40:18,347 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-09 09:40:18,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-09 09:40:18,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-09 09:40:18,534 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-09 09:40:18,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 22 [2021-11-09 09:40:18,711 INFO L354 Elim1Store]: treesize reduction 60, result has 20.0 percent of original size [2021-11-09 09:40:18,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 39 [2021-11-09 09:40:19,155 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-09 09:40:19,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 19 [2021-11-09 09:40:19,165 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:40:19,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [165247533] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:40:19,166 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:40:19,166 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-11-09 09:40:19,167 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437578517] [2021-11-09 09:40:19,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-09 09:40:19,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:40:19,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-09 09:40:19,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2021-11-09 09:40:19,171 INFO L87 Difference]: Start difference. First operand 387 states and 489 transitions. Second operand has 24 states, 23 states have (on average 3.347826086956522) internal successors, (77), 23 states have internal predecessors, (77), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:41:13,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:41:13,570 INFO L93 Difference]: Finished difference Result 577 states and 716 transitions. [2021-11-09 09:41:13,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-09 09:41:13,571 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 3.347826086956522) internal successors, (77), 23 states have internal predecessors, (77), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2021-11-09 09:41:13,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:41:13,574 INFO L225 Difference]: With dead ends: 577 [2021-11-09 09:41:13,575 INFO L226 Difference]: Without dead ends: 577 [2021-11-09 09:41:13,576 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 44.1s TimeCoverageRelationStatistics Valid=346, Invalid=1192, Unknown=22, NotChecked=0, Total=1560 [2021-11-09 09:41:13,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2021-11-09 09:41:13,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 451. [2021-11-09 09:41:13,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 451 states, 420 states have (on average 1.3523809523809525) internal successors, (568), 447 states have internal predecessors, (568), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:41:13,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 571 transitions. [2021-11-09 09:41:13,589 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 571 transitions. Word has length 43 [2021-11-09 09:41:13,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:41:13,590 INFO L470 AbstractCegarLoop]: Abstraction has 451 states and 571 transitions. [2021-11-09 09:41:13,590 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 3.347826086956522) internal successors, (77), 23 states have internal predecessors, (77), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:41:13,590 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 571 transitions. [2021-11-09 09:41:13,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-09 09:41:13,591 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:41:13,591 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:41:13,632 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b50a12a-cd1e-4684-9ccb-93d7319de555/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-09 09:41:13,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b50a12a-cd1e-4684-9ccb-93d7319de555/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:41:13,807 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting mainErr37REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 51 more)] === [2021-11-09 09:41:13,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:41:13,808 INFO L85 PathProgramCache]: Analyzing trace with hash 1960124731, now seen corresponding path program 1 times [2021-11-09 09:41:13,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:41:13,808 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363069586] [2021-11-09 09:41:13,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:41:13,808 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:41:13,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:14,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:41:14,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:14,152 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:41:14,153 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:41:14,153 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363069586] [2021-11-09 09:41:14,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363069586] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:41:14,153 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196518411] [2021-11-09 09:41:14,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:41:14,154 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:41:14,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b50a12a-cd1e-4684-9ccb-93d7319de555/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:41:14,167 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b50a12a-cd1e-4684-9ccb-93d7319de555/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:41:14,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b50a12a-cd1e-4684-9ccb-93d7319de555/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-09 09:41:14,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:14,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 43 conjunts are in the unsatisfiable core [2021-11-09 09:41:14,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:41:14,788 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-09 09:41:14,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-09 09:41:14,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-09 09:41:14,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-09 09:41:15,007 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-09 09:41:15,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 40 [2021-11-09 09:41:15,019 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-11-09 09:41:15,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 41 [2021-11-09 09:41:15,206 INFO L354 Elim1Store]: treesize reduction 60, result has 20.0 percent of original size [2021-11-09 09:41:15,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 98 treesize of output 75 [2021-11-09 09:41:15,226 INFO L354 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2021-11-09 09:41:15,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 90 treesize of output 84 [2021-11-09 09:41:15,972 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-09 09:41:15,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 74 treesize of output 51 [2021-11-09 09:41:15,979 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-09 09:41:15,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 24 [2021-11-09 09:41:16,055 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:41:16,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196518411] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:41:16,056 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:41:16,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-11-09 09:41:16,056 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911156502] [2021-11-09 09:41:16,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-09 09:41:16,056 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:41:16,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-09 09:41:16,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2021-11-09 09:41:16,059 INFO L87 Difference]: Start difference. First operand 451 states and 571 transitions. Second operand has 26 states, 25 states have (on average 3.16) internal successors, (79), 25 states have internal predecessors, (79), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:41:19,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:41:19,004 INFO L93 Difference]: Finished difference Result 688 states and 847 transitions. [2021-11-09 09:41:19,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-09 09:41:19,005 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 3.16) internal successors, (79), 25 states have internal predecessors, (79), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2021-11-09 09:41:19,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:41:19,008 INFO L225 Difference]: With dead ends: 688 [2021-11-09 09:41:19,008 INFO L226 Difference]: Without dead ends: 688 [2021-11-09 09:41:19,009 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=565, Invalid=2297, Unknown=0, NotChecked=0, Total=2862 [2021-11-09 09:41:19,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 688 states. [2021-11-09 09:41:19,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 688 to 476. [2021-11-09 09:41:19,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 445 states have (on average 1.3730337078651684) internal successors, (611), 472 states have internal predecessors, (611), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:41:19,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 614 transitions. [2021-11-09 09:41:19,022 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 614 transitions. Word has length 43 [2021-11-09 09:41:19,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:41:19,022 INFO L470 AbstractCegarLoop]: Abstraction has 476 states and 614 transitions. [2021-11-09 09:41:19,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 3.16) internal successors, (79), 25 states have internal predecessors, (79), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:41:19,023 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 614 transitions. [2021-11-09 09:41:19,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-09 09:41:19,023 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:41:19,024 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:41:19,060 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b50a12a-cd1e-4684-9ccb-93d7319de555/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-09 09:41:19,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b50a12a-cd1e-4684-9ccb-93d7319de555/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:41:19,243 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting mainErr36REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 51 more)] === [2021-11-09 09:41:19,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:41:19,243 INFO L85 PathProgramCache]: Analyzing trace with hash 1960309428, now seen corresponding path program 1 times [2021-11-09 09:41:19,243 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:41:19,244 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754045370] [2021-11-09 09:41:19,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:41:19,244 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:41:19,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:19,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:41:19,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:19,354 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-09 09:41:19,355 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:41:19,355 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754045370] [2021-11-09 09:41:19,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754045370] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:41:19,355 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:41:19,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-09 09:41:19,356 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570255115] [2021-11-09 09:41:19,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-09 09:41:19,357 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:41:19,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-09 09:41:19,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-09 09:41:19,358 INFO L87 Difference]: Start difference. First operand 476 states and 614 transitions. Second operand has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:41:19,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:41:19,724 INFO L93 Difference]: Finished difference Result 477 states and 608 transitions. [2021-11-09 09:41:19,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-09 09:41:19,727 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2021-11-09 09:41:19,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:41:19,730 INFO L225 Difference]: With dead ends: 477 [2021-11-09 09:41:19,730 INFO L226 Difference]: Without dead ends: 477 [2021-11-09 09:41:19,730 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-11-09 09:41:19,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2021-11-09 09:41:19,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 476. [2021-11-09 09:41:19,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 445 states have (on average 1.3595505617977528) internal successors, (605), 472 states have internal predecessors, (605), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:41:19,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 608 transitions. [2021-11-09 09:41:19,744 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 608 transitions. Word has length 43 [2021-11-09 09:41:19,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:41:19,745 INFO L470 AbstractCegarLoop]: Abstraction has 476 states and 608 transitions. [2021-11-09 09:41:19,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:41:19,745 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 608 transitions. [2021-11-09 09:41:19,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-09 09:41:19,746 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:41:19,746 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:41:19,746 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-11-09 09:41:19,746 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting mainErr36REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 51 more)] === [2021-11-09 09:41:19,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:41:19,747 INFO L85 PathProgramCache]: Analyzing trace with hash 937153082, now seen corresponding path program 1 times [2021-11-09 09:41:19,747 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:41:19,747 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648777632] [2021-11-09 09:41:19,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:41:19,748 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:41:19,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:20,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:41:20,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:20,182 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:41:20,182 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:41:20,182 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648777632] [2021-11-09 09:41:20,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648777632] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:41:20,182 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:41:20,183 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-11-09 09:41:20,183 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814701542] [2021-11-09 09:41:20,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-09 09:41:20,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:41:20,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-09 09:41:20,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-11-09 09:41:20,184 INFO L87 Difference]: Start difference. First operand 476 states and 608 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:41:21,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:41:21,136 INFO L93 Difference]: Finished difference Result 590 states and 730 transitions. [2021-11-09 09:41:21,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-09 09:41:21,136 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2021-11-09 09:41:21,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:41:21,139 INFO L225 Difference]: With dead ends: 590 [2021-11-09 09:41:21,139 INFO L226 Difference]: Without dead ends: 590 [2021-11-09 09:41:21,139 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=151, Invalid=499, Unknown=0, NotChecked=0, Total=650 [2021-11-09 09:41:21,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2021-11-09 09:41:21,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 489. [2021-11-09 09:41:21,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 489 states, 458 states have (on average 1.3799126637554586) internal successors, (632), 485 states have internal predecessors, (632), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:41:21,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 635 transitions. [2021-11-09 09:41:21,162 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 635 transitions. Word has length 43 [2021-11-09 09:41:21,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:41:21,163 INFO L470 AbstractCegarLoop]: Abstraction has 489 states and 635 transitions. [2021-11-09 09:41:21,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:41:21,163 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 635 transitions. [2021-11-09 09:41:21,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-09 09:41:21,164 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:41:21,164 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:41:21,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-11-09 09:41:21,165 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting mainErr36REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 51 more)] === [2021-11-09 09:41:21,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:41:21,165 INFO L85 PathProgramCache]: Analyzing trace with hash -1259165831, now seen corresponding path program 1 times [2021-11-09 09:41:21,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:41:21,166 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099186162] [2021-11-09 09:41:21,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:41:21,166 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:41:21,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:21,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:41:21,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:21,460 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:41:21,460 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:41:21,461 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099186162] [2021-11-09 09:41:21,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099186162] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:41:21,461 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095745136] [2021-11-09 09:41:21,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:41:21,461 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:41:21,461 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b50a12a-cd1e-4684-9ccb-93d7319de555/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:41:21,479 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b50a12a-cd1e-4684-9ccb-93d7319de555/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:41:21,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b50a12a-cd1e-4684-9ccb-93d7319de555/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-09 09:41:22,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:22,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-09 09:41:22,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:41:22,324 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-09 09:41:22,325 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 [2021-11-09 09:41:22,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-09 09:41:22,514 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-11-09 09:41:22,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 29 [2021-11-09 09:41:22,685 INFO L354 Elim1Store]: treesize reduction 68, result has 20.0 percent of original size [2021-11-09 09:41:22,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 41 [2021-11-09 09:41:29,264 INFO L354 Elim1Store]: treesize reduction 42, result has 6.7 percent of original size [2021-11-09 09:41:29,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 36 [2021-11-09 09:41:29,348 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:41:29,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2095745136] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:41:29,349 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:41:29,349 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 26 [2021-11-09 09:41:29,349 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49381593] [2021-11-09 09:41:29,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-09 09:41:29,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:41:29,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-09 09:41:29,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=581, Unknown=3, NotChecked=0, Total=702 [2021-11-09 09:41:29,350 INFO L87 Difference]: Start difference. First operand 489 states and 635 transitions. Second operand has 27 states, 26 states have (on average 3.1923076923076925) internal successors, (83), 26 states have internal predecessors, (83), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:42:19,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:42:19,746 INFO L93 Difference]: Finished difference Result 825 states and 1055 transitions. [2021-11-09 09:42:19,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-09 09:42:19,746 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 3.1923076923076925) internal successors, (83), 26 states have internal predecessors, (83), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2021-11-09 09:42:19,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:42:19,750 INFO L225 Difference]: With dead ends: 825 [2021-11-09 09:42:19,750 INFO L226 Difference]: Without dead ends: 825 [2021-11-09 09:42:19,751 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 45.7s TimeCoverageRelationStatistics Valid=442, Invalid=1511, Unknown=27, NotChecked=0, Total=1980 [2021-11-09 09:42:19,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 825 states. [2021-11-09 09:42:19,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 825 to 614. [2021-11-09 09:42:19,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 614 states, 583 states have (on average 1.3704974271012007) internal successors, (799), 610 states have internal predecessors, (799), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:42:19,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 614 states to 614 states and 802 transitions. [2021-11-09 09:42:19,766 INFO L78 Accepts]: Start accepts. Automaton has 614 states and 802 transitions. Word has length 45 [2021-11-09 09:42:19,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:42:19,766 INFO L470 AbstractCegarLoop]: Abstraction has 614 states and 802 transitions. [2021-11-09 09:42:19,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 3.1923076923076925) internal successors, (83), 26 states have internal predecessors, (83), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:42:19,767 INFO L276 IsEmpty]: Start isEmpty. Operand 614 states and 802 transitions. [2021-11-09 09:42:19,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-09 09:42:19,767 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:42:19,768 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:42:19,808 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b50a12a-cd1e-4684-9ccb-93d7319de555/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-09 09:42:19,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b50a12a-cd1e-4684-9ccb-93d7319de555/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-11-09 09:42:19,983 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting mainErr37REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 51 more)] === [2021-11-09 09:42:19,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:42:19,983 INFO L85 PathProgramCache]: Analyzing trace with hash -1259165830, now seen corresponding path program 1 times [2021-11-09 09:42:19,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:42:19,984 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292285888] [2021-11-09 09:42:19,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:42:19,984 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:42:20,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:42:20,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:42:20,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:42:20,352 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:42:20,352 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:42:20,352 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292285888] [2021-11-09 09:42:20,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292285888] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:42:20,353 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020438424] [2021-11-09 09:42:20,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:42:20,353 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:42:20,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b50a12a-cd1e-4684-9ccb-93d7319de555/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:42:20,358 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b50a12a-cd1e-4684-9ccb-93d7319de555/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:42:20,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b50a12a-cd1e-4684-9ccb-93d7319de555/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-09 09:42:20,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:42:20,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-09 09:42:20,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:42:21,131 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 [2021-11-09 09:42:21,146 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-09 09:42:21,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-09 09:42:21,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-09 09:42:21,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-09 09:42:21,334 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-11-09 09:42:21,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 49 [2021-11-09 09:42:21,349 INFO L354 Elim1Store]: treesize reduction 43, result has 17.3 percent of original size [2021-11-09 09:42:21,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 60 [2021-11-09 09:42:21,582 INFO L354 Elim1Store]: treesize reduction 68, result has 20.0 percent of original size [2021-11-09 09:42:21,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 129 treesize of output 86 [2021-11-09 09:42:21,611 INFO L354 Elim1Store]: treesize reduction 92, result has 20.0 percent of original size [2021-11-09 09:42:21,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 119 treesize of output 109 [2021-11-09 09:42:23,806 INFO L354 Elim1Store]: treesize reduction 42, result has 6.7 percent of original size [2021-11-09 09:42:23,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 104 treesize of output 68 [2021-11-09 09:42:23,821 INFO L354 Elim1Store]: treesize reduction 42, result has 6.7 percent of original size [2021-11-09 09:42:23,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 56 treesize of output 41 [2021-11-09 09:42:23,836 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:42:23,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020438424] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:42:23,837 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:42:23,837 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-11-09 09:42:23,837 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91547313] [2021-11-09 09:42:23,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-09 09:42:23,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:42:23,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-09 09:42:23,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=548, Unknown=1, NotChecked=0, Total=650 [2021-11-09 09:42:23,840 INFO L87 Difference]: Start difference. First operand 614 states and 802 transitions. Second operand has 26 states, 25 states have (on average 3.24) internal successors, (81), 25 states have internal predecessors, (81), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:42:30,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:42:30,671 INFO L93 Difference]: Finished difference Result 797 states and 1014 transitions. [2021-11-09 09:42:30,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-09 09:42:30,672 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 3.24) internal successors, (81), 25 states have internal predecessors, (81), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2021-11-09 09:42:30,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:42:30,675 INFO L225 Difference]: With dead ends: 797 [2021-11-09 09:42:30,675 INFO L226 Difference]: Without dead ends: 797 [2021-11-09 09:42:30,676 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=364, Invalid=1438, Unknown=4, NotChecked=0, Total=1806 [2021-11-09 09:42:30,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 797 states. [2021-11-09 09:42:30,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 797 to 628. [2021-11-09 09:42:30,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 628 states, 597 states have (on average 1.3752093802345058) internal successors, (821), 624 states have internal predecessors, (821), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:42:30,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 628 states to 628 states and 824 transitions. [2021-11-09 09:42:30,691 INFO L78 Accepts]: Start accepts. Automaton has 628 states and 824 transitions. Word has length 45 [2021-11-09 09:42:30,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:42:30,692 INFO L470 AbstractCegarLoop]: Abstraction has 628 states and 824 transitions. [2021-11-09 09:42:30,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 3.24) internal successors, (81), 25 states have internal predecessors, (81), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:42:30,692 INFO L276 IsEmpty]: Start isEmpty. Operand 628 states and 824 transitions. [2021-11-09 09:42:30,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-09 09:42:30,693 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:42:30,693 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:42:30,734 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b50a12a-cd1e-4684-9ccb-93d7319de555/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-09 09:42:30,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b50a12a-cd1e-4684-9ccb-93d7319de555/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:42:30,907 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting mainErr55ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 51 more)] === [2021-11-09 09:42:30,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:42:30,907 INFO L85 PathProgramCache]: Analyzing trace with hash 715680382, now seen corresponding path program 1 times [2021-11-09 09:42:30,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:42:30,907 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10686733] [2021-11-09 09:42:30,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:42:30,908 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:42:30,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:42:31,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:42:31,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:42:31,136 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:42:31,137 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:42:31,137 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10686733] [2021-11-09 09:42:31,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10686733] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:42:31,137 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:42:31,137 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-11-09 09:42:31,137 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95702508] [2021-11-09 09:42:31,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-09 09:42:31,138 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:42:31,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-09 09:42:31,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-11-09 09:42:31,138 INFO L87 Difference]: Start difference. First operand 628 states and 824 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:42:31,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:42:31,781 INFO L93 Difference]: Finished difference Result 873 states and 1119 transitions. [2021-11-09 09:42:31,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-09 09:42:31,781 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2021-11-09 09:42:31,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:42:31,785 INFO L225 Difference]: With dead ends: 873 [2021-11-09 09:42:31,786 INFO L226 Difference]: Without dead ends: 862 [2021-11-09 09:42:31,786 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=140, Invalid=460, Unknown=0, NotChecked=0, Total=600 [2021-11-09 09:42:31,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 862 states. [2021-11-09 09:42:31,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 862 to 637. [2021-11-09 09:42:31,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 637 states, 606 states have (on average 1.3696369636963697) internal successors, (830), 633 states have internal predecessors, (830), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:42:31,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 833 transitions. [2021-11-09 09:42:31,800 INFO L78 Accepts]: Start accepts. Automaton has 637 states and 833 transitions. Word has length 47 [2021-11-09 09:42:31,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:42:31,800 INFO L470 AbstractCegarLoop]: Abstraction has 637 states and 833 transitions. [2021-11-09 09:42:31,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:42:31,801 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 833 transitions. [2021-11-09 09:42:31,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-09 09:42:31,802 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:42:31,802 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:42:31,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-11-09 09:42:31,802 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting mainErr55ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 51 more)] === [2021-11-09 09:42:31,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:42:31,803 INFO L85 PathProgramCache]: Analyzing trace with hash -1192322178, now seen corresponding path program 1 times [2021-11-09 09:42:31,803 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:42:31,803 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848968646] [2021-11-09 09:42:31,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:42:31,803 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:42:31,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:42:32,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:42:32,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:42:32,164 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:42:32,165 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:42:32,165 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848968646] [2021-11-09 09:42:32,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848968646] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:42:32,165 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:42:32,166 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-11-09 09:42:32,166 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910175054] [2021-11-09 09:42:32,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-09 09:42:32,167 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:42:32,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-09 09:42:32,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-11-09 09:42:32,168 INFO L87 Difference]: Start difference. First operand 637 states and 833 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:42:33,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:42:33,157 INFO L93 Difference]: Finished difference Result 852 states and 1093 transitions. [2021-11-09 09:42:33,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-09 09:42:33,166 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2021-11-09 09:42:33,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:42:33,170 INFO L225 Difference]: With dead ends: 852 [2021-11-09 09:42:33,170 INFO L226 Difference]: Without dead ends: 852 [2021-11-09 09:42:33,170 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=164, Invalid=486, Unknown=0, NotChecked=0, Total=650 [2021-11-09 09:42:33,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 852 states. [2021-11-09 09:42:33,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 852 to 637. [2021-11-09 09:42:33,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 637 states, 606 states have (on average 1.3663366336633664) internal successors, (828), 633 states have internal predecessors, (828), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:42:33,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 831 transitions. [2021-11-09 09:42:33,183 INFO L78 Accepts]: Start accepts. Automaton has 637 states and 831 transitions. Word has length 47 [2021-11-09 09:42:33,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:42:33,184 INFO L470 AbstractCegarLoop]: Abstraction has 637 states and 831 transitions. [2021-11-09 09:42:33,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:42:33,184 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 831 transitions. [2021-11-09 09:42:33,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-09 09:42:33,185 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:42:33,185 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:42:33,185 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-11-09 09:42:33,185 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting mainErr4REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 51 more)] === [2021-11-09 09:42:33,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:42:33,186 INFO L85 PathProgramCache]: Analyzing trace with hash -989501359, now seen corresponding path program 1 times [2021-11-09 09:42:33,186 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:42:33,186 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596066532] [2021-11-09 09:42:33,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:42:33,187 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:42:33,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:42:33,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:42:33,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:42:33,696 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:42:33,697 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:42:33,697 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596066532] [2021-11-09 09:42:33,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596066532] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:42:33,699 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792965922] [2021-11-09 09:42:33,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:42:33,699 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:42:33,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b50a12a-cd1e-4684-9ccb-93d7319de555/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:42:33,700 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b50a12a-cd1e-4684-9ccb-93d7319de555/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:42:33,734 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b50a12a-cd1e-4684-9ccb-93d7319de555/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-09 09:42:34,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:42:34,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-09 09:42:34,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:42:34,574 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-09 09:42:34,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-09 09:42:34,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-09 09:42:34,833 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-09 09:42:34,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 31 [2021-11-09 09:42:35,104 INFO L354 Elim1Store]: treesize reduction 60, result has 20.0 percent of original size [2021-11-09 09:42:35,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 43 [2021-11-09 09:42:39,646 INFO L354 Elim1Store]: treesize reduction 48, result has 36.0 percent of original size [2021-11-09 09:42:39,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 41 [2021-11-09 09:42:39,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:42:39,798 INFO L354 Elim1Store]: treesize reduction 65, result has 12.2 percent of original size [2021-11-09 09:42:39,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 78 treesize of output 61 [2021-11-09 09:42:40,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:42:40,150 INFO L354 Elim1Store]: treesize reduction 114, result has 18.6 percent of original size [2021-11-09 09:42:40,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 97 treesize of output 68 [2021-11-09 09:42:40,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:42:40,552 INFO L354 Elim1Store]: treesize reduction 186, result has 15.1 percent of original size [2021-11-09 09:42:40,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 112 treesize of output 80 [2021-11-09 09:42:44,625 INFO L354 Elim1Store]: treesize reduction 72, result has 1.4 percent of original size [2021-11-09 09:42:44,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 93 treesize of output 47 [2021-11-09 09:42:44,802 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:42:44,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792965922] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:42:44,803 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:42:44,803 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 22] total 39 [2021-11-09 09:42:44,803 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981139989] [2021-11-09 09:42:44,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-11-09 09:42:44,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:42:44,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-11-09 09:42:44,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=311, Invalid=1244, Unknown=5, NotChecked=0, Total=1560 [2021-11-09 09:42:44,805 INFO L87 Difference]: Start difference. First operand 637 states and 831 transitions. Second operand has 40 states, 39 states have (on average 2.3846153846153846) internal successors, (93), 39 states have internal predecessors, (93), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:46:45,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:46:45,710 INFO L93 Difference]: Finished difference Result 1837 states and 2349 transitions. [2021-11-09 09:46:45,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2021-11-09 09:46:45,711 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 2.3846153846153846) internal successors, (93), 39 states have internal predecessors, (93), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2021-11-09 09:46:45,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:46:45,718 INFO L225 Difference]: With dead ends: 1837 [2021-11-09 09:46:45,718 INFO L226 Difference]: Without dead ends: 1837 [2021-11-09 09:46:45,723 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6790 ImplicationChecksByTransitivity, 197.3s TimeCoverageRelationStatistics Valid=3858, Invalid=16928, Unknown=94, NotChecked=0, Total=20880 [2021-11-09 09:46:45,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1837 states. [2021-11-09 09:46:45,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1837 to 708. [2021-11-09 09:46:45,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 708 states, 677 states have (on average 1.3707533234859675) internal successors, (928), 704 states have internal predecessors, (928), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:46:45,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 708 states to 708 states and 931 transitions. [2021-11-09 09:46:45,742 INFO L78 Accepts]: Start accepts. Automaton has 708 states and 931 transitions. Word has length 50 [2021-11-09 09:46:45,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:46:45,743 INFO L470 AbstractCegarLoop]: Abstraction has 708 states and 931 transitions. [2021-11-09 09:46:45,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 2.3846153846153846) internal successors, (93), 39 states have internal predecessors, (93), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:46:45,743 INFO L276 IsEmpty]: Start isEmpty. Operand 708 states and 931 transitions. [2021-11-09 09:46:45,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-09 09:46:45,744 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:46:45,744 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:46:45,788 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b50a12a-cd1e-4684-9ccb-93d7319de555/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-09 09:46:45,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b50a12a-cd1e-4684-9ccb-93d7319de555/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-11-09 09:46:45,971 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting mainErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 51 more)] === [2021-11-09 09:46:45,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:46:45,971 INFO L85 PathProgramCache]: Analyzing trace with hash -989501358, now seen corresponding path program 1 times [2021-11-09 09:46:45,971 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:46:45,972 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404979360] [2021-11-09 09:46:45,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:46:45,972 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:46:46,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:46:46,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:46:46,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:46:46,496 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:46:46,497 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:46:46,497 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404979360] [2021-11-09 09:46:46,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404979360] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:46:46,497 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351084214] [2021-11-09 09:46:46,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:46:46,498 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:46:46,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b50a12a-cd1e-4684-9ccb-93d7319de555/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:46:46,506 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b50a12a-cd1e-4684-9ccb-93d7319de555/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:46:46,526 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b50a12a-cd1e-4684-9ccb-93d7319de555/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-09 09:46:47,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:46:47,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 61 conjunts are in the unsatisfiable core [2021-11-09 09:46:47,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:46:47,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-09 09:46:47,399 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-09 09:46:47,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-09 09:46:47,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-09 09:46:47,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2021-11-09 09:46:47,687 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-09 09:46:47,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 80 treesize of output 54 [2021-11-09 09:46:47,699 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-11-09 09:46:47,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 72 treesize of output 67 [2021-11-09 09:46:48,016 INFO L354 Elim1Store]: treesize reduction 60, result has 20.0 percent of original size [2021-11-09 09:46:48,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 106 treesize of output 75 [2021-11-09 09:46:48,052 INFO L354 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2021-11-09 09:46:48,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 98 treesize of output 96 [2021-11-09 09:46:54,678 INFO L354 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2021-11-09 09:46:54,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 22 [2021-11-09 09:46:54,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-11-09 09:46:54,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:46:54,855 INFO L354 Elim1Store]: treesize reduction 65, result has 12.2 percent of original size [2021-11-09 09:46:54,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 111 treesize of output 90 [2021-11-09 09:46:54,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:46:54,877 INFO L354 Elim1Store]: treesize reduction 65, result has 16.7 percent of original size [2021-11-09 09:46:54,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 107 treesize of output 109 [2021-11-09 09:46:55,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:46:55,276 INFO L354 Elim1Store]: treesize reduction 114, result has 18.6 percent of original size [2021-11-09 09:46:55,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 140 treesize of output 95 [2021-11-09 09:46:55,312 INFO L354 Elim1Store]: treesize reduction 108, result has 16.3 percent of original size [2021-11-09 09:46:55,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 130 treesize of output 126 [2021-11-09 09:46:55,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:46:55,679 INFO L354 Elim1Store]: treesize reduction 186, result has 15.1 percent of original size [2021-11-09 09:46:55,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 170 treesize of output 116 [2021-11-09 09:46:55,715 INFO L354 Elim1Store]: treesize reduction 184, result has 15.6 percent of original size [2021-11-09 09:46:55,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 160 treesize of output 159 [2021-11-09 09:47:02,451 INFO L354 Elim1Store]: treesize reduction 72, result has 1.4 percent of original size [2021-11-09 09:47:02,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 128 treesize of output 74 [2021-11-09 09:47:02,458 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-11-09 09:47:02,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 39 [2021-11-09 09:47:02,577 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:47:02,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351084214] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:47:02,578 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:47:02,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 22] total 38 [2021-11-09 09:47:02,578 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160474358] [2021-11-09 09:47:02,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-11-09 09:47:02,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:47:02,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-11-09 09:47:02,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=1233, Unknown=5, NotChecked=0, Total=1482 [2021-11-09 09:47:02,580 INFO L87 Difference]: Start difference. First operand 708 states and 931 transitions. Second operand has 39 states, 38 states have (on average 2.4473684210526314) internal successors, (93), 38 states have internal predecessors, (93), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:47:18,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:47:18,733 INFO L93 Difference]: Finished difference Result 1796 states and 2299 transitions. [2021-11-09 09:47:18,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-11-09 09:47:18,734 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 2.4473684210526314) internal successors, (93), 38 states have internal predecessors, (93), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2021-11-09 09:47:18,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:47:18,742 INFO L225 Difference]: With dead ends: 1796 [2021-11-09 09:47:18,742 INFO L226 Difference]: Without dead ends: 1796 [2021-11-09 09:47:18,747 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4976 ImplicationChecksByTransitivity, 26.2s TimeCoverageRelationStatistics Valid=2449, Invalid=12798, Unknown=5, NotChecked=0, Total=15252 [2021-11-09 09:47:18,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1796 states. [2021-11-09 09:47:18,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1796 to 728. [2021-11-09 09:47:18,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 728 states, 697 states have (on average 1.3687230989956958) internal successors, (954), 724 states have internal predecessors, (954), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:47:18,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 728 states to 728 states and 957 transitions. [2021-11-09 09:47:18,773 INFO L78 Accepts]: Start accepts. Automaton has 728 states and 957 transitions. Word has length 50 [2021-11-09 09:47:18,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:47:18,774 INFO L470 AbstractCegarLoop]: Abstraction has 728 states and 957 transitions. [2021-11-09 09:47:18,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 2.4473684210526314) internal successors, (93), 38 states have internal predecessors, (93), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:47:18,774 INFO L276 IsEmpty]: Start isEmpty. Operand 728 states and 957 transitions. [2021-11-09 09:47:18,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-09 09:47:18,775 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:47:18,775 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:47:18,819 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b50a12a-cd1e-4684-9ccb-93d7319de555/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-11-09 09:47:18,977 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b50a12a-cd1e-4684-9ccb-93d7319de555/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-11-09 09:47:18,977 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting mainErr4REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 51 more)] === [2021-11-09 09:47:18,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:47:18,977 INFO L85 PathProgramCache]: Analyzing trace with hash -989316661, now seen corresponding path program 1 times [2021-11-09 09:47:18,978 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:47:18,978 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295641020] [2021-11-09 09:47:18,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:47:18,978 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:47:19,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:47:19,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:47:19,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:47:19,305 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:47:19,305 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:47:19,305 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295641020] [2021-11-09 09:47:19,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295641020] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:47:19,305 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371359543] [2021-11-09 09:47:19,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:47:19,305 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:47:19,306 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b50a12a-cd1e-4684-9ccb-93d7319de555/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:47:19,307 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b50a12a-cd1e-4684-9ccb-93d7319de555/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:47:19,325 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b50a12a-cd1e-4684-9ccb-93d7319de555/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-09 09:47:20,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:47:20,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-09 09:47:20,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:47:20,794 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-09 09:47:20,794 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 [2021-11-09 09:47:20,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-09 09:47:21,035 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-11-09 09:47:21,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 29 [2021-11-09 09:47:21,228 INFO L354 Elim1Store]: treesize reduction 68, result has 20.0 percent of original size [2021-11-09 09:47:21,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 41 [2021-11-09 09:47:27,652 INFO L354 Elim1Store]: treesize reduction 42, result has 6.7 percent of original size [2021-11-09 09:47:27,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 36 [2021-11-09 09:47:27,716 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:47:27,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371359543] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:47:27,716 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:47:27,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 26 [2021-11-09 09:47:27,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105950203] [2021-11-09 09:47:27,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-09 09:47:27,717 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:47:27,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-09 09:47:27,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=581, Unknown=3, NotChecked=0, Total=702 [2021-11-09 09:47:27,718 INFO L87 Difference]: Start difference. First operand 728 states and 957 transitions. Second operand has 27 states, 26 states have (on average 3.576923076923077) internal successors, (93), 26 states have internal predecessors, (93), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:48:19,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:48:19,348 INFO L93 Difference]: Finished difference Result 976 states and 1261 transitions. [2021-11-09 09:48:19,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-09 09:48:19,349 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 3.576923076923077) internal successors, (93), 26 states have internal predecessors, (93), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2021-11-09 09:48:19,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:48:19,353 INFO L225 Difference]: With dead ends: 976 [2021-11-09 09:48:19,353 INFO L226 Difference]: Without dead ends: 976 [2021-11-09 09:48:19,353 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 41.4s TimeCoverageRelationStatistics Valid=409, Invalid=1373, Unknown=24, NotChecked=0, Total=1806 [2021-11-09 09:48:19,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 976 states. [2021-11-09 09:48:19,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 976 to 733. [2021-11-09 09:48:19,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 733 states, 702 states have (on average 1.368945868945869) internal successors, (961), 729 states have internal predecessors, (961), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:48:19,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 733 states to 733 states and 964 transitions. [2021-11-09 09:48:19,377 INFO L78 Accepts]: Start accepts. Automaton has 733 states and 964 transitions. Word has length 50 [2021-11-09 09:48:19,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:48:19,378 INFO L470 AbstractCegarLoop]: Abstraction has 733 states and 964 transitions. [2021-11-09 09:48:19,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 3.576923076923077) internal successors, (93), 26 states have internal predecessors, (93), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:48:19,378 INFO L276 IsEmpty]: Start isEmpty. Operand 733 states and 964 transitions. [2021-11-09 09:48:19,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-09 09:48:19,379 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:48:19,379 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:48:19,420 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b50a12a-cd1e-4684-9ccb-93d7319de555/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-09 09:48:19,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b50a12a-cd1e-4684-9ccb-93d7319de555/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-11-09 09:48:19,592 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting mainErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 51 more)] === [2021-11-09 09:48:19,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:48:19,592 INFO L85 PathProgramCache]: Analyzing trace with hash -989316660, now seen corresponding path program 1 times [2021-11-09 09:48:19,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:48:19,592 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458415893] [2021-11-09 09:48:19,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:48:19,593 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:48:19,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:48:19,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:48:20,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:48:20,003 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:48:20,003 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:48:20,003 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458415893] [2021-11-09 09:48:20,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458415893] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:48:20,004 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667684592] [2021-11-09 09:48:20,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:48:20,004 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:48:20,004 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b50a12a-cd1e-4684-9ccb-93d7319de555/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:48:20,008 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b50a12a-cd1e-4684-9ccb-93d7319de555/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:48:20,009 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b50a12a-cd1e-4684-9ccb-93d7319de555/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-09 09:48:20,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:48:20,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-09 09:48:20,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:48:21,163 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-09 09:48:21,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-09 09:48:21,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-09 09:48:21,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-09 09:48:21,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-09 09:48:21,323 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-11-09 09:48:21,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 49 [2021-11-09 09:48:21,341 INFO L354 Elim1Store]: treesize reduction 43, result has 17.3 percent of original size [2021-11-09 09:48:21,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 60 [2021-11-09 09:48:21,531 INFO L354 Elim1Store]: treesize reduction 60, result has 20.0 percent of original size [2021-11-09 09:48:21,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 107 treesize of output 80 [2021-11-09 09:48:21,551 INFO L354 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2021-11-09 09:48:21,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 99 treesize of output 93 [2021-11-09 09:48:22,181 INFO L354 Elim1Store]: treesize reduction 38, result has 7.3 percent of original size [2021-11-09 09:48:22,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 93 treesize of output 67 [2021-11-09 09:48:22,192 INFO L354 Elim1Store]: treesize reduction 38, result has 7.3 percent of original size [2021-11-09 09:48:22,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 55 treesize of output 38 [2021-11-09 09:48:22,205 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:48:22,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667684592] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:48:22,205 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:48:22,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 21 [2021-11-09 09:48:22,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867074596] [2021-11-09 09:48:22,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-09 09:48:22,206 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:48:22,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-09 09:48:22,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2021-11-09 09:48:22,207 INFO L87 Difference]: Start difference. First operand 733 states and 964 transitions. Second operand has 22 states, 21 states have (on average 3.3333333333333335) internal successors, (70), 21 states have internal predecessors, (70), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:48:24,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:48:24,076 INFO L93 Difference]: Finished difference Result 949 states and 1225 transitions. [2021-11-09 09:48:24,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-09 09:48:24,077 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 3.3333333333333335) internal successors, (70), 21 states have internal predecessors, (70), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2021-11-09 09:48:24,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:48:24,080 INFO L225 Difference]: With dead ends: 949 [2021-11-09 09:48:24,080 INFO L226 Difference]: Without dead ends: 949 [2021-11-09 09:48:24,081 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=286, Invalid=974, Unknown=0, NotChecked=0, Total=1260 [2021-11-09 09:48:24,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 949 states. [2021-11-09 09:48:24,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 949 to 752. [2021-11-09 09:48:24,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 752 states, 721 states have (on average 1.3661581137309293) internal successors, (985), 748 states have internal predecessors, (985), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:48:24,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 752 states to 752 states and 988 transitions. [2021-11-09 09:48:24,091 INFO L78 Accepts]: Start accepts. Automaton has 752 states and 988 transitions. Word has length 50 [2021-11-09 09:48:24,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:48:24,091 INFO L470 AbstractCegarLoop]: Abstraction has 752 states and 988 transitions. [2021-11-09 09:48:24,091 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 3.3333333333333335) internal successors, (70), 21 states have internal predecessors, (70), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:48:24,091 INFO L276 IsEmpty]: Start isEmpty. Operand 752 states and 988 transitions. [2021-11-09 09:48:24,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-09 09:48:24,092 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:48:24,092 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:48:24,116 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b50a12a-cd1e-4684-9ccb-93d7319de555/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-09 09:48:24,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b50a12a-cd1e-4684-9ccb-93d7319de555/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-11-09 09:48:24,295 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting mainErr46REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 51 more)] === [2021-11-09 09:48:24,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:48:24,295 INFO L85 PathProgramCache]: Analyzing trace with hash -1134684594, now seen corresponding path program 1 times [2021-11-09 09:48:24,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:48:24,296 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44082000] [2021-11-09 09:48:24,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:48:24,296 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:48:24,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:48:24,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:48:24,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:48:24,404 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:48:24,405 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:48:24,405 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44082000] [2021-11-09 09:48:24,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44082000] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:48:24,405 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549938241] [2021-11-09 09:48:24,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:48:24,406 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:48:24,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b50a12a-cd1e-4684-9ccb-93d7319de555/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:48:24,411 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b50a12a-cd1e-4684-9ccb-93d7319de555/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:48:24,413 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b50a12a-cd1e-4684-9ccb-93d7319de555/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-09 09:48:25,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:48:25,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-09 09:48:25,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:48:25,776 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:48:25,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549938241] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:48:25,776 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:48:25,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 7 [2021-11-09 09:48:25,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73951773] [2021-11-09 09:48:25,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-09 09:48:25,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:48:25,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-09 09:48:25,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-09 09:48:25,778 INFO L87 Difference]: Start difference. First operand 752 states and 988 transitions. Second operand has 8 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:48:26,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:48:26,049 INFO L93 Difference]: Finished difference Result 788 states and 1012 transitions. [2021-11-09 09:48:26,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-09 09:48:26,049 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2021-11-09 09:48:26,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:48:26,052 INFO L225 Difference]: With dead ends: 788 [2021-11-09 09:48:26,052 INFO L226 Difference]: Without dead ends: 788 [2021-11-09 09:48:26,052 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-11-09 09:48:26,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 788 states. [2021-11-09 09:48:26,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 788 to 749. [2021-11-09 09:48:26,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 749 states, 721 states have (on average 1.3411927877947296) internal successors, (967), 745 states have internal predecessors, (967), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:48:26,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 749 states to 749 states and 970 transitions. [2021-11-09 09:48:26,065 INFO L78 Accepts]: Start accepts. Automaton has 749 states and 970 transitions. Word has length 50 [2021-11-09 09:48:26,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:48:26,066 INFO L470 AbstractCegarLoop]: Abstraction has 749 states and 970 transitions. [2021-11-09 09:48:26,066 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:48:26,066 INFO L276 IsEmpty]: Start isEmpty. Operand 749 states and 970 transitions. [2021-11-09 09:48:26,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-09 09:48:26,067 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:48:26,067 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:48:26,093 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b50a12a-cd1e-4684-9ccb-93d7319de555/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-09 09:48:26,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b50a12a-cd1e-4684-9ccb-93d7319de555/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:48:26,276 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting mainErr47REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 51 more)] === [2021-11-09 09:48:26,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:48:26,276 INFO L85 PathProgramCache]: Analyzing trace with hash -1134684593, now seen corresponding path program 1 times [2021-11-09 09:48:26,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:48:26,276 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191612827] [2021-11-09 09:48:26,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:48:26,277 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:48:26,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:48:26,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:48:26,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:48:26,408 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-09 09:48:26,408 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:48:26,408 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191612827] [2021-11-09 09:48:26,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191612827] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:48:26,408 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096544227] [2021-11-09 09:48:26,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:48:26,409 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:48:26,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b50a12a-cd1e-4684-9ccb-93d7319de555/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:48:26,410 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b50a12a-cd1e-4684-9ccb-93d7319de555/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:48:26,423 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b50a12a-cd1e-4684-9ccb-93d7319de555/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-09 09:48:27,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:48:27,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-09 09:48:27,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:48:27,864 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:48:27,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096544227] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:48:27,864 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:48:27,865 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-11-09 09:48:27,865 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698187459] [2021-11-09 09:48:27,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-09 09:48:27,865 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:48:27,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-09 09:48:27,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-11-09 09:48:27,866 INFO L87 Difference]: Start difference. First operand 749 states and 970 transitions. Second operand has 15 states, 14 states have (on average 6.571428571428571) internal successors, (92), 14 states have internal predecessors, (92), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:48:28,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:48:28,491 INFO L93 Difference]: Finished difference Result 854 states and 1089 transitions. [2021-11-09 09:48:28,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-09 09:48:28,491 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 6.571428571428571) internal successors, (92), 14 states have internal predecessors, (92), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2021-11-09 09:48:28,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:48:28,495 INFO L225 Difference]: With dead ends: 854 [2021-11-09 09:48:28,495 INFO L226 Difference]: Without dead ends: 854 [2021-11-09 09:48:28,495 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2021-11-09 09:48:28,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 854 states. [2021-11-09 09:48:28,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 854 to 800. [2021-11-09 09:48:28,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 800 states, 772 states have (on average 1.33419689119171) internal successors, (1030), 796 states have internal predecessors, (1030), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:48:28,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 800 states to 800 states and 1033 transitions. [2021-11-09 09:48:28,505 INFO L78 Accepts]: Start accepts. Automaton has 800 states and 1033 transitions. Word has length 50 [2021-11-09 09:48:28,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:48:28,506 INFO L470 AbstractCegarLoop]: Abstraction has 800 states and 1033 transitions. [2021-11-09 09:48:28,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 6.571428571428571) internal successors, (92), 14 states have internal predecessors, (92), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:48:28,506 INFO L276 IsEmpty]: Start isEmpty. Operand 800 states and 1033 transitions. [2021-11-09 09:48:28,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-09 09:48:28,507 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:48:28,507 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:48:28,531 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b50a12a-cd1e-4684-9ccb-93d7319de555/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-09 09:48:28,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b50a12a-cd1e-4684-9ccb-93d7319de555/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:48:28,713 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting mainErr36REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 51 more)] === [2021-11-09 09:48:28,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:48:28,713 INFO L85 PathProgramCache]: Analyzing trace with hash -211320060, now seen corresponding path program 1 times [2021-11-09 09:48:28,713 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:48:28,713 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006665485] [2021-11-09 09:48:28,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:48:28,713 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:48:28,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:48:29,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:48:29,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:48:29,167 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:48:29,167 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:48:29,167 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006665485] [2021-11-09 09:48:29,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006665485] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:48:29,168 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406034985] [2021-11-09 09:48:29,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:48:29,168 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:48:29,168 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b50a12a-cd1e-4684-9ccb-93d7319de555/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:48:29,171 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b50a12a-cd1e-4684-9ccb-93d7319de555/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:48:29,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b50a12a-cd1e-4684-9ccb-93d7319de555/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-09 09:48:30,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:48:30,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-09 09:48:30,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:48:30,393 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-09 09:48:30,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-09 09:48:30,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-09 09:48:30,667 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-09 09:48:30,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 31 [2021-11-09 09:48:30,920 INFO L354 Elim1Store]: treesize reduction 60, result has 20.0 percent of original size [2021-11-09 09:48:30,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 43 [2021-11-09 09:48:35,352 INFO L354 Elim1Store]: treesize reduction 48, result has 36.0 percent of original size [2021-11-09 09:48:35,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 41 [2021-11-09 09:48:35,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:48:35,525 INFO L354 Elim1Store]: treesize reduction 65, result has 12.2 percent of original size [2021-11-09 09:48:35,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 78 treesize of output 61 [2021-11-09 09:48:35,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:48:35,912 INFO L354 Elim1Store]: treesize reduction 114, result has 18.6 percent of original size [2021-11-09 09:48:35,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 97 treesize of output 68 [2021-11-09 09:48:36,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:48:36,262 INFO L354 Elim1Store]: treesize reduction 186, result has 15.1 percent of original size [2021-11-09 09:48:36,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 112 treesize of output 80 [2021-11-09 09:48:42,894 INFO L354 Elim1Store]: treesize reduction 72, result has 1.4 percent of original size [2021-11-09 09:48:42,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 93 treesize of output 47 [2021-11-09 09:48:43,040 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:48:43,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406034985] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:48:43,040 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:48:43,040 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 22] total 38 [2021-11-09 09:48:43,040 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210056487] [2021-11-09 09:48:43,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-11-09 09:48:43,041 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:48:43,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-11-09 09:48:43,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=294, Invalid=1183, Unknown=5, NotChecked=0, Total=1482 [2021-11-09 09:48:43,042 INFO L87 Difference]: Start difference. First operand 800 states and 1033 transitions. Second operand has 39 states, 38 states have (on average 2.5) internal successors, (95), 38 states have internal predecessors, (95), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)