./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-patterns/array15_pattern.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-patterns/array15_pattern.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 511c1484167d1d7d90ff27dae8a1569edd7c5a72fd917e4f05baeab770e0fcd4 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 05:46:49,135 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 05:46:49,140 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 05:46:49,225 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 05:46:49,226 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 05:46:49,231 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 05:46:49,234 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 05:46:49,238 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 05:46:49,242 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 05:46:49,249 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 05:46:49,250 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 05:46:49,253 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 05:46:49,253 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 05:46:49,275 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 05:46:49,277 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 05:46:49,279 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 05:46:49,280 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 05:46:49,281 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 05:46:49,283 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 05:46:49,286 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 05:46:49,288 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 05:46:49,290 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 05:46:49,292 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 05:46:49,293 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 05:46:49,298 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 05:46:49,298 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 05:46:49,299 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 05:46:49,301 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 05:46:49,301 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 05:46:49,303 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 05:46:49,304 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 05:46:49,305 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 05:46:49,306 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 05:46:49,307 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 05:46:49,309 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 05:46:49,310 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 05:46:49,311 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 05:46:49,311 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 05:46:49,312 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 05:46:49,313 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 05:46:49,315 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 05:46:49,316 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-20 05:46:49,347 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 05:46:49,351 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 05:46:49,352 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 05:46:49,352 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 05:46:49,361 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 05:46:49,362 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 05:46:49,363 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 05:46:49,364 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 05:46:49,364 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 05:46:49,364 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 05:46:49,366 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 05:46:49,366 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 05:46:49,367 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 05:46:49,367 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 05:46:49,367 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 05:46:49,368 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 05:46:49,368 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 05:46:49,368 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 05:46:49,369 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 05:46:49,369 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 05:46:49,369 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 05:46:49,370 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 05:46:49,370 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 05:46:49,370 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 05:46:49,371 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 05:46:49,371 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 05:46:49,372 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 05:46:49,372 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 05:46:49,372 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 05:46:49,374 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 05:46:49,375 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-20 05:46:49,375 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-20 05:46:49,376 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 05:46:49,376 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 05:46:49,376 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_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 511c1484167d1d7d90ff27dae8a1569edd7c5a72fd917e4f05baeab770e0fcd4 [2021-11-20 05:46:49,749 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 05:46:49,775 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 05:46:49,778 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 05:46:49,780 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 05:46:49,781 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 05:46:49,783 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/array-patterns/array15_pattern.c [2021-11-20 05:46:49,865 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/data/41f5f38f1/2e978bb2389a4a4f823401880a878e2f/FLAG5e5e380ff [2021-11-20 05:46:50,468 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 05:46:50,469 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/sv-benchmarks/c/array-patterns/array15_pattern.c [2021-11-20 05:46:50,476 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/data/41f5f38f1/2e978bb2389a4a4f823401880a878e2f/FLAG5e5e380ff [2021-11-20 05:46:50,847 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/data/41f5f38f1/2e978bb2389a4a4f823401880a878e2f [2021-11-20 05:46:50,850 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 05:46:50,852 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 05:46:50,856 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 05:46:50,856 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 05:46:50,862 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 05:46:50,863 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 05:46:50" (1/1) ... [2021-11-20 05:46:50,865 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ffa1604 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:46:50, skipping insertion in model container [2021-11-20 05:46:50,866 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 05:46:50" (1/1) ... [2021-11-20 05:46:50,877 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 05:46:50,897 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 05:46:51,055 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/sv-benchmarks/c/array-patterns/array15_pattern.c[1424,1437] [2021-11-20 05:46:51,087 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 05:46:51,096 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 05:46:51,110 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/sv-benchmarks/c/array-patterns/array15_pattern.c[1424,1437] [2021-11-20 05:46:51,123 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 05:46:51,139 INFO L208 MainTranslator]: Completed translation [2021-11-20 05:46:51,140 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:46:51 WrapperNode [2021-11-20 05:46:51,140 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 05:46:51,142 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 05:46:51,142 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 05:46:51,142 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 05:46:51,153 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:46:51" (1/1) ... [2021-11-20 05:46:51,161 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:46:51" (1/1) ... [2021-11-20 05:46:51,190 INFO L137 Inliner]: procedures = 16, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 96 [2021-11-20 05:46:51,191 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 05:46:51,192 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 05:46:51,192 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 05:46:51,192 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 05:46:51,203 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:46:51" (1/1) ... [2021-11-20 05:46:51,203 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:46:51" (1/1) ... [2021-11-20 05:46:51,206 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:46:51" (1/1) ... [2021-11-20 05:46:51,207 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:46:51" (1/1) ... [2021-11-20 05:46:51,215 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:46:51" (1/1) ... [2021-11-20 05:46:51,221 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:46:51" (1/1) ... [2021-11-20 05:46:51,223 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:46:51" (1/1) ... [2021-11-20 05:46:51,227 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 05:46:51,228 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 05:46:51,228 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 05:46:51,229 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 05:46:51,230 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:46:51" (1/1) ... [2021-11-20 05:46:51,240 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 05:46:51,255 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:46:51,274 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 05:46:51,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 05:46:51,335 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 05:46:51,336 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-20 05:46:51,336 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-20 05:46:51,336 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 05:46:51,337 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-20 05:46:51,337 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-20 05:46:51,337 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 05:46:51,337 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 05:46:51,338 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-20 05:46:51,338 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 05:46:51,443 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 05:46:51,445 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 05:46:51,713 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 05:46:51,721 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 05:46:51,721 INFO L301 CfgBuilder]: Removed 5 assume(true) statements. [2021-11-20 05:46:51,723 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 05:46:51 BoogieIcfgContainer [2021-11-20 05:46:51,724 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 05:46:51,726 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 05:46:51,726 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 05:46:51,731 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 05:46:51,731 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 05:46:50" (1/3) ... [2021-11-20 05:46:51,732 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@232ca40d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 05:46:51, skipping insertion in model container [2021-11-20 05:46:51,732 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:46:51" (2/3) ... [2021-11-20 05:46:51,733 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@232ca40d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 05:46:51, skipping insertion in model container [2021-11-20 05:46:51,733 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 05:46:51" (3/3) ... [2021-11-20 05:46:51,735 INFO L111 eAbstractionObserver]: Analyzing ICFG array15_pattern.c [2021-11-20 05:46:51,741 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 05:46:51,742 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 05:46:51,859 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 05:46:51,868 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-20 05:46:51,869 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 05:46:51,891 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 27 states have internal predecessors, (41), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 05:46:51,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-20 05:46:51,899 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:46:51,900 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:46:51,901 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:46:51,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:46:51,908 INFO L85 PathProgramCache]: Analyzing trace with hash 179087049, now seen corresponding path program 1 times [2021-11-20 05:46:51,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:46:51,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210798381] [2021-11-20 05:46:51,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:46:51,936 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:46:52,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:46:52,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 05:46:52,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:46:52,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:46:52,126 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:46:52,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210798381] [2021-11-20 05:46:52,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210798381] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:46:52,128 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:46:52,129 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 05:46:52,131 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351333714] [2021-11-20 05:46:52,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:46:52,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-20 05:46:52,138 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:46:52,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-20 05:46:52,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 05:46:52,178 INFO L87 Difference]: Start difference. First operand has 32 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 27 states have internal predecessors, (41), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 05:46:52,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:46:52,206 INFO L93 Difference]: Finished difference Result 61 states and 93 transitions. [2021-11-20 05:46:52,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 05:46:52,209 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-11-20 05:46:52,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:46:52,219 INFO L225 Difference]: With dead ends: 61 [2021-11-20 05:46:52,219 INFO L226 Difference]: Without dead ends: 28 [2021-11-20 05:46:52,223 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 05:46:52,229 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:46:52,231 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 05:46:52,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-11-20 05:46:52,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-11-20 05:46:52,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 states have internal predecessors, (29), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 05:46:52,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2021-11-20 05:46:52,280 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 15 [2021-11-20 05:46:52,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:46:52,281 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2021-11-20 05:46:52,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 05:46:52,282 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2021-11-20 05:46:52,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-20 05:46:52,285 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:46:52,285 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:46:52,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 05:46:52,286 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:46:52,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:46:52,288 INFO L85 PathProgramCache]: Analyzing trace with hash 1195633489, now seen corresponding path program 1 times [2021-11-20 05:46:52,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:46:52,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338010965] [2021-11-20 05:46:52,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:46:52,289 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:46:52,309 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 05:46:52,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2104895324] [2021-11-20 05:46:52,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:46:52,310 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:46:52,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:46:52,313 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:46:52,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 05:46:52,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:46:52,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 05:46:52,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:46:52,691 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 05:46:52,691 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 05:46:52,692 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:46:52,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338010965] [2021-11-20 05:46:52,693 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 05:46:52,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104895324] [2021-11-20 05:46:52,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104895324] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:46:52,695 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:46:52,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-20 05:46:52,697 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82200666] [2021-11-20 05:46:52,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:46:52,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 05:46:52,698 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:46:52,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 05:46:52,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-20 05:46:52,700 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-20 05:46:52,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:46:52,947 INFO L93 Difference]: Finished difference Result 60 states and 74 transitions. [2021-11-20 05:46:52,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 05:46:52,952 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2021-11-20 05:46:52,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:46:52,953 INFO L225 Difference]: With dead ends: 60 [2021-11-20 05:46:52,954 INFO L226 Difference]: Without dead ends: 40 [2021-11-20 05:46:52,955 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-11-20 05:46:52,957 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 47 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 05:46:52,958 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 53 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 05:46:52,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-11-20 05:46:52,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 34. [2021-11-20 05:46:52,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 states have internal predecessors, (34), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 05:46:52,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2021-11-20 05:46:52,974 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 29 [2021-11-20 05:46:52,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:46:52,975 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2021-11-20 05:46:52,975 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-20 05:46:52,976 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2021-11-20 05:46:52,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-20 05:46:52,977 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:46:52,978 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:46:53,007 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 05:46:53,178 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:46:53,179 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:46:53,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:46:53,180 INFO L85 PathProgramCache]: Analyzing trace with hash -712222617, now seen corresponding path program 1 times [2021-11-20 05:46:53,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:46:53,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588572009] [2021-11-20 05:46:53,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:46:53,181 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:46:53,195 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 05:46:53,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1085250807] [2021-11-20 05:46:53,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:46:53,196 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:46:53,196 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:46:53,197 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:46:53,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 05:46:53,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:46:53,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 05:46:53,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:46:53,394 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-20 05:46:53,394 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 05:46:53,395 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:46:53,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588572009] [2021-11-20 05:46:53,395 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 05:46:53,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085250807] [2021-11-20 05:46:53,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085250807] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:46:53,396 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:46:53,396 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 05:46:53,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067945543] [2021-11-20 05:46:53,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:46:53,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 05:46:53,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:46:53,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 05:46:53,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 05:46:53,399 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-20 05:46:53,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:46:53,468 INFO L93 Difference]: Finished difference Result 63 states and 77 transitions. [2021-11-20 05:46:53,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 05:46:53,468 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 35 [2021-11-20 05:46:53,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:46:53,470 INFO L225 Difference]: With dead ends: 63 [2021-11-20 05:46:53,470 INFO L226 Difference]: Without dead ends: 38 [2021-11-20 05:46:53,471 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:46:53,473 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 24 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:46:53,474 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 49 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 05:46:53,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-11-20 05:46:53,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2021-11-20 05:46:53,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 30 states have (on average 1.2) internal successors, (36), 30 states have internal predecessors, (36), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 05:46:53,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2021-11-20 05:46:53,484 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 35 [2021-11-20 05:46:53,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:46:53,485 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2021-11-20 05:46:53,485 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-20 05:46:53,485 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2021-11-20 05:46:53,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-20 05:46:53,487 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:46:53,487 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:46:53,535 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 05:46:53,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:46:53,715 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:46:53,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:46:53,716 INFO L85 PathProgramCache]: Analyzing trace with hash -459431893, now seen corresponding path program 1 times [2021-11-20 05:46:53,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:46:53,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768842112] [2021-11-20 05:46:53,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:46:53,718 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:46:53,732 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 05:46:53,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1551832951] [2021-11-20 05:46:53,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:46:53,740 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:46:53,740 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:46:53,748 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:46:53,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 05:46:53,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:46:53,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-20 05:46:53,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:46:54,204 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 05:46:54,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:46:54,732 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-20 05:46:54,732 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:46:54,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768842112] [2021-11-20 05:46:54,733 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 05:46:54,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551832951] [2021-11-20 05:46:54,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551832951] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:46:54,733 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:46:54,734 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2021-11-20 05:46:54,734 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881084530] [2021-11-20 05:46:54,734 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 05:46:54,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-20 05:46:54,735 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:46:54,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-20 05:46:54,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2021-11-20 05:46:54,737 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand has 20 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 15 states have internal predecessors, (41), 4 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-11-20 05:46:55,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:46:55,258 INFO L93 Difference]: Finished difference Result 107 states and 126 transitions. [2021-11-20 05:46:55,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-20 05:46:55,259 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 15 states have internal predecessors, (41), 4 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 39 [2021-11-20 05:46:55,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:46:55,262 INFO L225 Difference]: With dead ends: 107 [2021-11-20 05:46:55,262 INFO L226 Difference]: Without dead ends: 85 [2021-11-20 05:46:55,263 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=183, Invalid=747, Unknown=0, NotChecked=0, Total=930 [2021-11-20 05:46:55,264 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 113 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 359 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 05:46:55,265 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 163 Invalid, 409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 359 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 05:46:55,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-11-20 05:46:55,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 60. [2021-11-20 05:46:55,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 49 states have (on average 1.2040816326530612) internal successors, (59), 50 states have internal predecessors, (59), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-20 05:46:55,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 71 transitions. [2021-11-20 05:46:55,290 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 71 transitions. Word has length 39 [2021-11-20 05:46:55,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:46:55,293 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 71 transitions. [2021-11-20 05:46:55,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 15 states have internal predecessors, (41), 4 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-11-20 05:46:55,295 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 71 transitions. [2021-11-20 05:46:55,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-20 05:46:55,299 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:46:55,300 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:46:55,339 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-20 05:46:55,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-11-20 05:46:55,515 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:46:55,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:46:55,516 INFO L85 PathProgramCache]: Analyzing trace with hash -1046237907, now seen corresponding path program 1 times [2021-11-20 05:46:55,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:46:55,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155895798] [2021-11-20 05:46:55,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:46:55,517 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:46:55,525 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 05:46:55,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [548080278] [2021-11-20 05:46:55,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:46:55,526 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:46:55,526 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:46:55,527 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:46:55,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 05:46:55,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:46:55,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-20 05:46:55,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:46:55,714 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 [2021-11-20 05:46:55,723 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 [2021-11-20 05:46:56,137 INFO L354 Elim1Store]: treesize reduction 256, result has 28.3 percent of original size [2021-11-20 05:46:56,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 118 treesize of output 180 [2021-11-20 05:46:56,776 INFO L354 Elim1Store]: treesize reduction 31, result has 3.1 percent of original size [2021-11-20 05:46:56,777 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 102 treesize of output 55 [2021-11-20 05:46:56,835 INFO L354 Elim1Store]: treesize reduction 72, result has 1.4 percent of original size [2021-11-20 05:46:56,836 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 109 treesize of output 58 [2021-11-20 05:46:56,969 INFO L354 Elim1Store]: treesize reduction 55, result has 24.7 percent of original size [2021-11-20 05:46:56,970 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 92 treesize of output 59 [2021-11-20 05:46:57,096 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 42 treesize of output 30 [2021-11-20 05:46:57,178 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 05:46:57,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:46:57,597 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 05:46:57,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 74 treesize of output 74 [2021-11-20 05:46:57,617 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 19 treesize of output 4 [2021-11-20 05:46:57,652 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 21 treesize of output 4 [2021-11-20 05:46:57,690 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 05:46:57,691 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 66 treesize of output 102 [2021-11-20 05:46:58,293 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-20 05:46:58,293 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:46:58,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155895798] [2021-11-20 05:46:58,294 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 05:46:58,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548080278] [2021-11-20 05:46:58,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548080278] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:46:58,294 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:46:58,294 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-11-20 05:46:58,294 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675665306] [2021-11-20 05:46:58,295 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 05:46:58,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-20 05:46:58,295 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:46:58,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-20 05:46:58,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2021-11-20 05:46:58,296 INFO L87 Difference]: Start difference. First operand 60 states and 71 transitions. Second operand has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-20 05:46:59,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:46:59,272 INFO L93 Difference]: Finished difference Result 92 states and 109 transitions. [2021-11-20 05:46:59,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-20 05:46:59,272 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 39 [2021-11-20 05:46:59,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:46:59,275 INFO L225 Difference]: With dead ends: 92 [2021-11-20 05:46:59,275 INFO L226 Difference]: Without dead ends: 88 [2021-11-20 05:46:59,275 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 55 SyntacticMatches, 6 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-11-20 05:46:59,276 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 34 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-20 05:46:59,277 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 218 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 276 Invalid, 0 Unknown, 25 Unchecked, 0.7s Time] [2021-11-20 05:46:59,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-11-20 05:46:59,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 77. [2021-11-20 05:46:59,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 63 states have (on average 1.2063492063492063) internal successors, (76), 64 states have internal predecessors, (76), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-20 05:46:59,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 92 transitions. [2021-11-20 05:46:59,290 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 92 transitions. Word has length 39 [2021-11-20 05:46:59,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:46:59,291 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 92 transitions. [2021-11-20 05:46:59,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-20 05:46:59,291 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 92 transitions. [2021-11-20 05:46:59,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-20 05:46:59,292 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:46:59,293 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2021-11-20 05:46:59,328 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-20 05:46:59,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:46:59,519 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:46:59,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:46:59,520 INFO L85 PathProgramCache]: Analyzing trace with hash -252023569, now seen corresponding path program 2 times [2021-11-20 05:46:59,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:46:59,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101385234] [2021-11-20 05:46:59,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:46:59,520 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:46:59,529 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 05:46:59,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [120761748] [2021-11-20 05:46:59,529 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 05:46:59,529 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:46:59,529 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:46:59,536 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:46:59,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-20 05:46:59,607 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 05:46:59,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:46:59,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 05:46:59,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:46:59,720 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 05:46:59,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:46:59,814 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-20 05:46:59,815 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:46:59,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101385234] [2021-11-20 05:46:59,815 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 05:46:59,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120761748] [2021-11-20 05:46:59,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120761748] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:46:59,816 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:46:59,817 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-11-20 05:46:59,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990984712] [2021-11-20 05:46:59,817 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 05:46:59,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 05:46:59,819 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:46:59,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 05:46:59,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-20 05:46:59,820 INFO L87 Difference]: Start difference. First operand 77 states and 92 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 05:46:59,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:46:59,997 INFO L93 Difference]: Finished difference Result 155 states and 184 transitions. [2021-11-20 05:46:59,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 05:46:59,998 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 41 [2021-11-20 05:47:00,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:47:00,004 INFO L225 Difference]: With dead ends: 155 [2021-11-20 05:47:00,004 INFO L226 Difference]: Without dead ends: 117 [2021-11-20 05:47:00,006 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-11-20 05:47:00,011 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 140 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:47:00,012 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 101 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 05:47:00,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-11-20 05:47:00,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 90. [2021-11-20 05:47:00,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 76 states have (on average 1.1842105263157894) internal successors, (90), 77 states have internal predecessors, (90), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-20 05:47:00,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 106 transitions. [2021-11-20 05:47:00,041 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 106 transitions. Word has length 41 [2021-11-20 05:47:00,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:47:00,041 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 106 transitions. [2021-11-20 05:47:00,041 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 05:47:00,044 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 106 transitions. [2021-11-20 05:47:00,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-20 05:47:00,051 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:47:00,051 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2021-11-20 05:47:00,090 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-20 05:47:00,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:47:00,271 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:47:00,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:47:00,272 INFO L85 PathProgramCache]: Analyzing trace with hash 796161581, now seen corresponding path program 2 times [2021-11-20 05:47:00,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:47:00,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449375395] [2021-11-20 05:47:00,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:47:00,273 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:47:00,278 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 05:47:00,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1212949777] [2021-11-20 05:47:00,278 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 05:47:00,278 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:47:00,279 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:47:00,287 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:47:00,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-20 05:47:00,344 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 05:47:00,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:47:00,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 05:47:00,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:47:00,476 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 05:47:00,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:47:00,581 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-20 05:47:00,582 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:47:00,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449375395] [2021-11-20 05:47:00,582 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 05:47:00,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212949777] [2021-11-20 05:47:00,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212949777] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:47:00,586 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:47:00,586 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-11-20 05:47:00,587 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973084218] [2021-11-20 05:47:00,587 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 05:47:00,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-20 05:47:00,588 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:47:00,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-20 05:47:00,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-11-20 05:47:00,589 INFO L87 Difference]: Start difference. First operand 90 states and 106 transitions. Second operand has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 states have internal predecessors, (40), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 05:47:00,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:47:00,764 INFO L93 Difference]: Finished difference Result 167 states and 203 transitions. [2021-11-20 05:47:00,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-20 05:47:00,765 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 states have internal predecessors, (40), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 41 [2021-11-20 05:47:00,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:47:00,766 INFO L225 Difference]: With dead ends: 167 [2021-11-20 05:47:00,766 INFO L226 Difference]: Without dead ends: 120 [2021-11-20 05:47:00,767 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2021-11-20 05:47:00,768 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 46 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:47:00,768 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 91 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 05:47:00,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-11-20 05:47:00,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 104. [2021-11-20 05:47:00,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 90 states have (on average 1.2) internal successors, (108), 91 states have internal predecessors, (108), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-20 05:47:00,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 124 transitions. [2021-11-20 05:47:00,786 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 124 transitions. Word has length 41 [2021-11-20 05:47:00,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:47:00,786 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 124 transitions. [2021-11-20 05:47:00,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 states have internal predecessors, (40), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 05:47:00,786 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 124 transitions. [2021-11-20 05:47:00,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-20 05:47:00,787 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:47:00,788 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 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] [2021-11-20 05:47:00,825 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-20 05:47:01,001 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-20 05:47:01,002 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:47:01,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:47:01,002 INFO L85 PathProgramCache]: Analyzing trace with hash 178867369, now seen corresponding path program 3 times [2021-11-20 05:47:01,002 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:47:01,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036190057] [2021-11-20 05:47:01,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:47:01,003 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:47:01,012 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 05:47:01,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [183653898] [2021-11-20 05:47:01,012 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 05:47:01,012 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:47:01,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:47:01,013 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:47:01,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-20 05:47:01,103 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-20 05:47:01,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:47:01,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 05:47:01,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:47:01,213 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-20 05:47:01,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:47:01,307 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-20 05:47:01,307 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:47:01,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036190057] [2021-11-20 05:47:01,308 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 05:47:01,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183653898] [2021-11-20 05:47:01,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183653898] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:47:01,308 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:47:01,308 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-11-20 05:47:01,308 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026777787] [2021-11-20 05:47:01,309 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 05:47:01,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 05:47:01,309 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:47:01,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 05:47:01,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-20 05:47:01,310 INFO L87 Difference]: Start difference. First operand 104 states and 124 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 states have internal predecessors, (36), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-20 05:47:01,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:47:01,445 INFO L93 Difference]: Finished difference Result 144 states and 167 transitions. [2021-11-20 05:47:01,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 05:47:01,445 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 states have internal predecessors, (36), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 44 [2021-11-20 05:47:01,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:47:01,446 INFO L225 Difference]: With dead ends: 144 [2021-11-20 05:47:01,446 INFO L226 Difference]: Without dead ends: 74 [2021-11-20 05:47:01,447 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-11-20 05:47:01,448 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 44 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:47:01,448 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 85 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 05:47:01,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-11-20 05:47:01,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 72. [2021-11-20 05:47:01,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 63 states have (on average 1.1746031746031746) internal successors, (74), 63 states have internal predecessors, (74), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-20 05:47:01,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 84 transitions. [2021-11-20 05:47:01,459 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 84 transitions. Word has length 44 [2021-11-20 05:47:01,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:47:01,459 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 84 transitions. [2021-11-20 05:47:01,459 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 states have internal predecessors, (36), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-20 05:47:01,459 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 84 transitions. [2021-11-20 05:47:01,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-20 05:47:01,460 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:47:01,460 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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] [2021-11-20 05:47:01,497 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-20 05:47:01,674 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:47:01,674 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:47:01,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:47:01,675 INFO L85 PathProgramCache]: Analyzing trace with hash 1693722629, now seen corresponding path program 3 times [2021-11-20 05:47:01,675 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:47:01,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240635626] [2021-11-20 05:47:01,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:47:01,676 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:47:01,684 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 05:47:01,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [551498972] [2021-11-20 05:47:01,684 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 05:47:01,684 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:47:01,684 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:47:01,685 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:47:01,695 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-20 05:47:01,739 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-20 05:47:01,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:47:01,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-20 05:47:01,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:47:02,002 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-20 05:47:02,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:47:02,384 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-20 05:47:02,384 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:47:02,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240635626] [2021-11-20 05:47:02,385 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 05:47:02,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551498972] [2021-11-20 05:47:02,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551498972] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:47:02,385 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:47:02,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-11-20 05:47:02,387 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254712926] [2021-11-20 05:47:02,387 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 05:47:02,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-20 05:47:02,388 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:47:02,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-20 05:47:02,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2021-11-20 05:47:02,389 INFO L87 Difference]: Start difference. First operand 72 states and 84 transitions. Second operand has 21 states, 19 states have (on average 2.473684210526316) internal successors, (47), 16 states have internal predecessors, (47), 3 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-20 05:47:02,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:47:02,829 INFO L93 Difference]: Finished difference Result 98 states and 112 transitions. [2021-11-20 05:47:02,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-20 05:47:02,830 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 2.473684210526316) internal successors, (47), 16 states have internal predecessors, (47), 3 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 48 [2021-11-20 05:47:02,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:47:02,831 INFO L225 Difference]: With dead ends: 98 [2021-11-20 05:47:02,831 INFO L226 Difference]: Without dead ends: 92 [2021-11-20 05:47:02,832 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=263, Invalid=859, Unknown=0, NotChecked=0, Total=1122 [2021-11-20 05:47:02,832 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 192 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 05:47:02,833 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 138 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 05:47:02,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-11-20 05:47:02,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 54. [2021-11-20 05:47:02,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 48 states have (on average 1.1666666666666667) internal successors, (56), 48 states have internal predecessors, (56), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 05:47:02,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 62 transitions. [2021-11-20 05:47:02,841 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 62 transitions. Word has length 48 [2021-11-20 05:47:02,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:47:02,841 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 62 transitions. [2021-11-20 05:47:02,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 2.473684210526316) internal successors, (47), 16 states have internal predecessors, (47), 3 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-20 05:47:02,842 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 62 transitions. [2021-11-20 05:47:02,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-20 05:47:02,842 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:47:02,842 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:47:02,886 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-20 05:47:03,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:47:03,071 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:47:03,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:47:03,072 INFO L85 PathProgramCache]: Analyzing trace with hash 11450257, now seen corresponding path program 4 times [2021-11-20 05:47:03,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:47:03,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285351776] [2021-11-20 05:47:03,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:47:03,072 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:47:03,080 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 05:47:03,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1878483098] [2021-11-20 05:47:03,080 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 05:47:03,080 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:47:03,081 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:47:03,081 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:47:03,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-20 05:47:03,485 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 05:47:03,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:47:03,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 45 conjunts are in the unsatisfiable core [2021-11-20 05:47:03,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:47:03,590 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 22 treesize of output 18 [2021-11-20 05:47:03,604 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 24 treesize of output 20 [2021-11-20 05:47:03,736 INFO L354 Elim1Store]: treesize reduction 152, result has 20.4 percent of original size [2021-11-20 05:47:03,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 79 treesize of output 99 [2021-11-20 05:47:03,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:47:03,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 23 [2021-11-20 05:47:03,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:47:03,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 26 [2021-11-20 05:47:04,135 INFO L354 Elim1Store]: treesize reduction 315, result has 18.4 percent of original size [2021-11-20 05:47:04,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 95 treesize of output 134 [2021-11-20 05:47:04,154 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 05:47:04,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:47:04,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:47:04,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:47:04,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 27 [2021-11-20 05:47:04,427 INFO L354 Elim1Store]: treesize reduction 268, result has 18.0 percent of original size [2021-11-20 05:47:04,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 79 treesize of output 115 [2021-11-20 05:47:04,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:47:04,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:47:04,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:47:04,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:47:04,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:47:04,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:47:04,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 30 [2021-11-20 05:47:17,597 INFO L354 Elim1Store]: treesize reduction 358, result has 39.3 percent of original size [2021-11-20 05:47:17,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 14 case distinctions, treesize of input 106 treesize of output 304 [2021-11-20 05:47:19,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:47:19,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:47:19,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:47:19,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:47:19,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:47:19,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:47:19,490 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 05:47:19,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 158 treesize of output 209 [2021-11-20 05:47:45,050 INFO L354 Elim1Store]: treesize reduction 180, result has 37.1 percent of original size [2021-11-20 05:47:45,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 199 treesize of output 216 [2021-11-20 05:47:46,026 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 8 proven. 50 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 05:47:46,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:48:14,760 WARN L227 SmtUtils]: Spent 12.28s on a formula simplification that was a NOOP. DAG size: 53 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 05:48:23,939 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:48:23,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285351776] [2021-11-20 05:48:23,939 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 05:48:23,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878483098] [2021-11-20 05:48:23,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878483098] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:48:23,940 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 05:48:23,940 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2021-11-20 05:48:23,940 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122889614] [2021-11-20 05:48:23,941 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 05:48:23,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-20 05:48:23,941 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:48:23,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-20 05:48:23,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=1442, Unknown=20, NotChecked=0, Total=1722 [2021-11-20 05:48:23,943 INFO L87 Difference]: Start difference. First operand 54 states and 62 transitions. Second operand has 29 states, 29 states have (on average 1.6551724137931034) internal successors, (48), 29 states have internal predecessors, (48), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-20 05:48:25,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:48:25,433 INFO L93 Difference]: Finished difference Result 153 states and 182 transitions. [2021-11-20 05:48:25,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-20 05:48:25,433 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.6551724137931034) internal successors, (48), 29 states have internal predecessors, (48), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 57 [2021-11-20 05:48:25,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:48:25,435 INFO L225 Difference]: With dead ends: 153 [2021-11-20 05:48:25,435 INFO L226 Difference]: Without dead ends: 149 [2021-11-20 05:48:25,437 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 36 SyntacticMatches, 5 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 824 ImplicationChecksByTransitivity, 71.1s TimeCoverageRelationStatistics Valid=341, Invalid=1895, Unknown=20, NotChecked=0, Total=2256 [2021-11-20 05:48:25,438 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 91 mSDsluCounter, 426 mSDsCounter, 0 mSdLazyCounter, 476 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 460 SdHoareTripleChecker+Invalid, 1438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 925 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-20 05:48:25,438 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 460 Invalid, 1438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 476 Invalid, 0 Unknown, 925 Unchecked, 0.6s Time] [2021-11-20 05:48:25,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-11-20 05:48:25,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 90. [2021-11-20 05:48:25,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 81 states have (on average 1.1851851851851851) internal successors, (96), 81 states have internal predecessors, (96), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-20 05:48:25,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 106 transitions. [2021-11-20 05:48:25,456 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 106 transitions. Word has length 57 [2021-11-20 05:48:25,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:48:25,456 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 106 transitions. [2021-11-20 05:48:25,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.6551724137931034) internal successors, (48), 29 states have internal predecessors, (48), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-20 05:48:25,457 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 106 transitions. [2021-11-20 05:48:25,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-20 05:48:25,457 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:48:25,458 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:48:25,483 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-20 05:48:25,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-20 05:48:25,667 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:48:25,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:48:25,668 INFO L85 PathProgramCache]: Analyzing trace with hash 230304975, now seen corresponding path program 4 times [2021-11-20 05:48:25,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:48:25,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318423072] [2021-11-20 05:48:25,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:48:25,668 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:48:25,674 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 05:48:25,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1175995306] [2021-11-20 05:48:25,674 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 05:48:25,674 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:48:25,674 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:48:25,685 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:48:25,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-20 05:48:26,069 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 05:48:26,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:48:26,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 60 conjunts are in the unsatisfiable core [2021-11-20 05:48:26,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:48:26,154 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 24 treesize of output 20 [2021-11-20 05:48:26,163 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 22 treesize of output 18 [2021-11-20 05:48:26,299 INFO L354 Elim1Store]: treesize reduction 152, result has 20.4 percent of original size [2021-11-20 05:48:26,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 79 treesize of output 99 [2021-11-20 05:48:26,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:48:26,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 23 [2021-11-20 05:48:26,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:48:26,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 26 [2021-11-20 05:48:26,691 INFO L354 Elim1Store]: treesize reduction 315, result has 18.4 percent of original size [2021-11-20 05:48:26,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 95 treesize of output 134 [2021-11-20 05:48:26,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:48:26,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:48:26,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:48:26,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 25 [2021-11-20 05:48:26,926 INFO L354 Elim1Store]: treesize reduction 268, result has 18.0 percent of original size [2021-11-20 05:48:26,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 79 treesize of output 115 [2021-11-20 05:48:26,956 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 05:48:26,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:48:26,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:48:26,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:48:26,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:48:26,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:48:26,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:48:26,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 32 [2021-11-20 05:48:40,443 INFO L354 Elim1Store]: treesize reduction 687, result has 11.2 percent of original size [2021-11-20 05:48:40,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 19 case distinctions, treesize of input 151 treesize of output 174 [2021-11-20 05:48:40,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:48:40,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:48:40,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:48:40,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:48:40,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:48:40,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:48:40,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:48:40,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:48:40,526 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-11-20 05:48:40,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 123 treesize of output 65 [2021-11-20 05:48:41,757 INFO L354 Elim1Store]: treesize reduction 168, result has 0.6 percent of original size [2021-11-20 05:48:41,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 92 treesize of output 39 [2021-11-20 05:48:41,896 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 8 proven. 50 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 05:48:41,897 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:49:04,721 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 05:49:04,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 520 treesize of output 520 [2021-11-20 05:49:04,939 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 21 treesize of output 4 [2021-11-20 05:49:05,380 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 19 treesize of output 4 [2021-11-20 05:49:05,589 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 512 treesize of output 492 [2021-11-20 05:49:07,282 INFO L354 Elim1Store]: treesize reduction 260, result has 56.4 percent of original size [2021-11-20 05:49:07,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 467193 treesize of output 443436 [2021-11-20 05:49:08,606 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:49:08,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318423072] [2021-11-20 05:49:08,606 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 05:49:08,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175995306] [2021-11-20 05:49:08,606 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-11-20 05:49:08,606 INFO L186 FreeRefinementEngine]: Found 0 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:49:08,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-11-20 05:49:08,606 ERROR L172 FreeRefinementEngine]: Strategy CAMEL failed to provide any proof altough trace is infeasible [2021-11-20 05:49:08,607 INFO L628 BasicCegarLoop]: Counterexample might be feasible [2021-11-20 05:49:08,613 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-20 05:49:08,651 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-20 05:49:08,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:49:08,846 INFO L732 BasicCegarLoop]: Path program histogram: [4, 4, 1, 1, 1] [2021-11-20 05:49:08,847 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-20 05:49:08,867 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.11 05:49:08 BoogieIcfgContainer [2021-11-20 05:49:08,867 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-20 05:49:08,868 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-20 05:49:08,868 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-20 05:49:08,868 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-20 05:49:08,869 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 05:46:51" (3/4) ... [2021-11-20 05:49:08,871 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-20 05:49:08,871 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-20 05:49:08,872 INFO L158 Benchmark]: Toolchain (without parser) took 138020.27ms. Allocated memory was 92.3MB in the beginning and 167.8MB in the end (delta: 75.5MB). Free memory was 59.1MB in the beginning and 63.4MB in the end (delta: -4.3MB). Peak memory consumption was 72.7MB. Max. memory is 16.1GB. [2021-11-20 05:49:08,872 INFO L158 Benchmark]: CDTParser took 0.37ms. Allocated memory is still 92.3MB. Free memory is still 58.1MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-20 05:49:08,873 INFO L158 Benchmark]: CACSL2BoogieTranslator took 285.25ms. Allocated memory is still 92.3MB. Free memory was 59.0MB in the beginning and 48.5MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-20 05:49:08,873 INFO L158 Benchmark]: Boogie Procedure Inliner took 49.07ms. Allocated memory is still 92.3MB. Free memory was 48.5MB in the beginning and 46.8MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-20 05:49:08,874 INFO L158 Benchmark]: Boogie Preprocessor took 35.42ms. Allocated memory is still 92.3MB. Free memory was 46.8MB in the beginning and 45.5MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-20 05:49:08,874 INFO L158 Benchmark]: RCFGBuilder took 495.95ms. Allocated memory was 92.3MB in the beginning and 138.4MB in the end (delta: 46.1MB). Free memory was 45.4MB in the beginning and 110.6MB in the end (delta: -65.2MB). Peak memory consumption was 15.1MB. Max. memory is 16.1GB. [2021-11-20 05:49:08,875 INFO L158 Benchmark]: TraceAbstraction took 137141.12ms. Allocated memory was 138.4MB in the beginning and 167.8MB in the end (delta: 29.4MB). Free memory was 110.6MB in the beginning and 63.4MB in the end (delta: 47.2MB). Peak memory consumption was 99.6MB. Max. memory is 16.1GB. [2021-11-20 05:49:08,875 INFO L158 Benchmark]: Witness Printer took 3.87ms. Allocated memory is still 167.8MB. Free memory is still 63.4MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-20 05:49:08,876 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.37ms. Allocated memory is still 92.3MB. Free memory is still 58.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 285.25ms. Allocated memory is still 92.3MB. Free memory was 59.0MB in the beginning and 48.5MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 49.07ms. Allocated memory is still 92.3MB. Free memory was 48.5MB in the beginning and 46.8MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 35.42ms. Allocated memory is still 92.3MB. Free memory was 46.8MB in the beginning and 45.5MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 495.95ms. Allocated memory was 92.3MB in the beginning and 138.4MB in the end (delta: 46.1MB). Free memory was 45.4MB in the beginning and 110.6MB in the end (delta: -65.2MB). Peak memory consumption was 15.1MB. Max. memory is 16.1GB. * TraceAbstraction took 137141.12ms. Allocated memory was 138.4MB in the beginning and 167.8MB in the end (delta: 29.4MB). Free memory was 110.6MB in the beginning and 63.4MB in the end (delta: 47.2MB). Peak memory consumption was 99.6MB. Max. memory is 16.1GB. * Witness Printer took 3.87ms. Allocated memory is still 167.8MB. Free memory is still 63.4MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 39]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L43] signed long long ARR_SIZE ; [L47] ARR_SIZE = (signed long long)__VERIFIER_nondet_short() [L48] CALL assume_abort_if_not(ARR_SIZE > 0) [L37] COND FALSE !(!cond) [L48] RET assume_abort_if_not(ARR_SIZE > 0) [L50] int array[ARR_SIZE][ARR_SIZE] ; [L52] int row = 0, column = 0, num = -1 ; [L53] signed long long sum = 0 ; [L54] int temp ; [L55] short index1,index2 ; [L57] row=0 [L57] COND TRUE row=0 && index1 < ARR_SIZE) [L37] COND FALSE !(!cond) [L66] RET assume_abort_if_not(index1>=0 && index1 < ARR_SIZE) [L67] CALL assume_abort_if_not(index2>=0 && index2 < ARR_SIZE) [L37] COND FALSE !(!cond) [L67] RET assume_abort_if_not(index2>=0 && index2 < ARR_SIZE) [L69] temp = index1+index2 [L70] EXPR (temp == ARR_SIZE-2 || temp == ARR_SIZE) ? (num*num*num*num) : array[index1][index2] [L70] EXPR array[index1][index2] [L70] EXPR (temp == ARR_SIZE-2 || temp == ARR_SIZE) ? (num*num*num*num) : array[index1][index2] [L70] array[index1][index2] = (temp == ARR_SIZE-2 || temp == ARR_SIZE) ? (num*num*num*num) : array[index1][index2] [L73] temp = __VERIFIER_nondet_int() [L74] COND TRUE temp == 0 [L77] row=0 [L77] COND TRUE row main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 511c1484167d1d7d90ff27dae8a1569edd7c5a72fd917e4f05baeab770e0fcd4 [2021-11-20 05:49:12,005 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 05:49:12,028 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 05:49:12,030 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 05:49:12,032 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 05:49:12,033 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 05:49:12,034 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/array-patterns/array15_pattern.c [2021-11-20 05:49:12,109 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/data/10aac8a2a/8dc70d33a1af4cdd9e4b06ee44687e2b/FLAG8e23bb391 [2021-11-20 05:49:12,566 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 05:49:12,567 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/sv-benchmarks/c/array-patterns/array15_pattern.c [2021-11-20 05:49:12,574 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/data/10aac8a2a/8dc70d33a1af4cdd9e4b06ee44687e2b/FLAG8e23bb391 [2021-11-20 05:49:12,966 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/data/10aac8a2a/8dc70d33a1af4cdd9e4b06ee44687e2b [2021-11-20 05:49:12,968 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 05:49:12,970 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 05:49:12,971 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 05:49:12,972 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 05:49:12,976 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 05:49:12,976 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 05:49:12" (1/1) ... [2021-11-20 05:49:12,978 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6291387a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:49:12, skipping insertion in model container [2021-11-20 05:49:12,978 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 05:49:12" (1/1) ... [2021-11-20 05:49:12,985 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 05:49:13,002 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 05:49:13,185 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/sv-benchmarks/c/array-patterns/array15_pattern.c[1424,1437] [2021-11-20 05:49:13,242 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 05:49:13,251 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 05:49:13,282 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/sv-benchmarks/c/array-patterns/array15_pattern.c[1424,1437] [2021-11-20 05:49:13,316 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 05:49:13,332 INFO L208 MainTranslator]: Completed translation [2021-11-20 05:49:13,333 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:49:13 WrapperNode [2021-11-20 05:49:13,333 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 05:49:13,334 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 05:49:13,334 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 05:49:13,335 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 05:49:13,342 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:49:13" (1/1) ... [2021-11-20 05:49:13,352 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:49:13" (1/1) ... [2021-11-20 05:49:13,374 INFO L137 Inliner]: procedures = 18, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 92 [2021-11-20 05:49:13,374 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 05:49:13,375 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 05:49:13,375 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 05:49:13,375 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 05:49:13,384 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:49:13" (1/1) ... [2021-11-20 05:49:13,384 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:49:13" (1/1) ... [2021-11-20 05:49:13,388 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:49:13" (1/1) ... [2021-11-20 05:49:13,388 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:49:13" (1/1) ... [2021-11-20 05:49:13,396 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:49:13" (1/1) ... [2021-11-20 05:49:13,401 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:49:13" (1/1) ... [2021-11-20 05:49:13,403 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:49:13" (1/1) ... [2021-11-20 05:49:13,412 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 05:49:13,416 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 05:49:13,418 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 05:49:13,423 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 05:49:13,424 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:49:13" (1/1) ... [2021-11-20 05:49:13,431 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 05:49:13,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:49:13,467 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 05:49:13,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 05:49:13,510 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 05:49:13,511 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-20 05:49:13,511 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-20 05:49:13,516 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-20 05:49:13,516 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-20 05:49:13,517 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-20 05:49:13,517 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 05:49:13,517 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 05:49:13,517 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 05:49:13,517 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-20 05:49:13,593 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 05:49:13,594 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 05:49:13,926 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 05:49:13,932 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 05:49:13,932 INFO L301 CfgBuilder]: Removed 5 assume(true) statements. [2021-11-20 05:49:13,934 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 05:49:13 BoogieIcfgContainer [2021-11-20 05:49:13,934 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 05:49:13,936 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 05:49:13,936 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 05:49:13,939 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 05:49:13,952 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 05:49:12" (1/3) ... [2021-11-20 05:49:13,953 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@271fd806 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 05:49:13, skipping insertion in model container [2021-11-20 05:49:13,953 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:49:13" (2/3) ... [2021-11-20 05:49:13,954 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@271fd806 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 05:49:13, skipping insertion in model container [2021-11-20 05:49:13,954 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 05:49:13" (3/3) ... [2021-11-20 05:49:13,955 INFO L111 eAbstractionObserver]: Analyzing ICFG array15_pattern.c [2021-11-20 05:49:13,961 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 05:49:13,961 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 05:49:14,037 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 05:49:14,057 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-20 05:49:14,059 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 05:49:14,078 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 27 states have internal predecessors, (41), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 05:49:14,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-20 05:49:14,083 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:49:14,084 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:49:14,085 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:49:14,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:49:14,091 INFO L85 PathProgramCache]: Analyzing trace with hash 179087049, now seen corresponding path program 1 times [2021-11-20 05:49:14,103 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:49:14,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [311882445] [2021-11-20 05:49:14,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:49:14,105 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:49:14,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:49:14,111 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:49:14,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-20 05:49:14,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:49:14,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-20 05:49:14,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:49:14,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:49:14,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:49:14,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:49:14,368 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 05:49:14,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [311882445] [2021-11-20 05:49:14,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [311882445] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 05:49:14,369 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:49:14,369 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-20 05:49:14,371 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653533380] [2021-11-20 05:49:14,372 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 05:49:14,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-20 05:49:14,376 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 05:49:14,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-20 05:49:14,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 05:49:14,404 INFO L87 Difference]: Start difference. First operand has 32 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 27 states have internal predecessors, (41), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 05:49:14,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:49:14,425 INFO L93 Difference]: Finished difference Result 61 states and 93 transitions. [2021-11-20 05:49:14,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 05:49:14,427 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-11-20 05:49:14,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:49:14,434 INFO L225 Difference]: With dead ends: 61 [2021-11-20 05:49:14,434 INFO L226 Difference]: Without dead ends: 28 [2021-11-20 05:49:14,437 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 05:49:14,441 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:49:14,442 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 05:49:14,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-11-20 05:49:14,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-11-20 05:49:14,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 states have internal predecessors, (29), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 05:49:14,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2021-11-20 05:49:14,479 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 15 [2021-11-20 05:49:14,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:49:14,480 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2021-11-20 05:49:14,480 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 05:49:14,481 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2021-11-20 05:49:14,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-20 05:49:14,483 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:49:14,483 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:49:14,499 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-20 05:49:14,694 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 05:49:14,694 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:49:14,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:49:14,695 INFO L85 PathProgramCache]: Analyzing trace with hash 1195633489, now seen corresponding path program 1 times [2021-11-20 05:49:14,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:49:14,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1917564384] [2021-11-20 05:49:14,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:49:14,697 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:49:14,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:49:14,698 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:49:14,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-20 05:49:14,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:49:14,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-20 05:49:14,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:49:15,590 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 05:49:15,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:49:16,433 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 05:49:16,433 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 05:49:16,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1917564384] [2021-11-20 05:49:16,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1917564384] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:49:16,434 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:49:16,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-11-20 05:49:16,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693426988] [2021-11-20 05:49:16,435 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 05:49:16,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-20 05:49:16,436 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 05:49:16,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-20 05:49:16,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-11-20 05:49:16,438 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand has 14 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-20 05:49:16,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:49:16,770 INFO L93 Difference]: Finished difference Result 51 states and 62 transitions. [2021-11-20 05:49:16,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-20 05:49:16,772 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 29 [2021-11-20 05:49:16,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:49:16,774 INFO L225 Difference]: With dead ends: 51 [2021-11-20 05:49:16,774 INFO L226 Difference]: Without dead ends: 47 [2021-11-20 05:49:16,775 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-11-20 05:49:16,777 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 24 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 05:49:16,777 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 162 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 48 Invalid, 0 Unknown, 44 Unchecked, 0.2s Time] [2021-11-20 05:49:16,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-11-20 05:49:16,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2021-11-20 05:49:16,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 37 states have (on average 1.2432432432432432) internal successors, (46), 37 states have internal predecessors, (46), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-20 05:49:16,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 56 transitions. [2021-11-20 05:49:16,790 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 56 transitions. Word has length 29 [2021-11-20 05:49:16,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:49:16,791 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 56 transitions. [2021-11-20 05:49:16,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-20 05:49:16,792 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 56 transitions. [2021-11-20 05:49:16,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-20 05:49:16,793 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:49:16,794 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:49:16,807 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-11-20 05:49:17,006 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 05:49:17,007 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:49:17,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:49:17,008 INFO L85 PathProgramCache]: Analyzing trace with hash 386286863, now seen corresponding path program 1 times [2021-11-20 05:49:17,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:49:17,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [270895493] [2021-11-20 05:49:17,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:49:17,009 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:49:17,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:49:17,010 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:49:17,042 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-20 05:49:17,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:49:17,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-20 05:49:17,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:49:17,780 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 05:49:17,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:49:18,458 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 05:49:18,459 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 05:49:18,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [270895493] [2021-11-20 05:49:18,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [270895493] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:49:18,460 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:49:18,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-11-20 05:49:18,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851474873] [2021-11-20 05:49:18,465 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 05:49:18,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-20 05:49:18,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 05:49:18,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-20 05:49:18,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-11-20 05:49:18,468 INFO L87 Difference]: Start difference. First operand 46 states and 56 transitions. Second operand has 14 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-20 05:49:18,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:49:18,810 INFO L93 Difference]: Finished difference Result 76 states and 94 transitions. [2021-11-20 05:49:18,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-20 05:49:18,812 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 29 [2021-11-20 05:49:18,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:49:18,814 INFO L225 Difference]: With dead ends: 76 [2021-11-20 05:49:18,814 INFO L226 Difference]: Without dead ends: 72 [2021-11-20 05:49:18,815 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-11-20 05:49:18,816 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 55 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 05:49:18,817 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 157 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 40 Invalid, 0 Unknown, 58 Unchecked, 0.2s Time] [2021-11-20 05:49:18,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-11-20 05:49:18,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2021-11-20 05:49:18,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 55 states have (on average 1.2363636363636363) internal successors, (68), 55 states have internal predecessors, (68), 9 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-20 05:49:18,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 86 transitions. [2021-11-20 05:49:18,840 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 86 transitions. Word has length 29 [2021-11-20 05:49:18,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:49:18,841 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 86 transitions. [2021-11-20 05:49:18,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-20 05:49:18,841 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 86 transitions. [2021-11-20 05:49:18,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-20 05:49:18,843 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:49:18,843 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:49:18,859 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-20 05:49:19,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 05:49:19,056 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:49:19,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:49:19,057 INFO L85 PathProgramCache]: Analyzing trace with hash -1917152573, now seen corresponding path program 1 times [2021-11-20 05:49:19,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:49:19,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1449554884] [2021-11-20 05:49:19,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:49:19,058 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:49:19,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:49:19,058 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:49:19,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-20 05:49:19,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:49:19,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-20 05:49:19,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:49:19,747 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-20 05:49:19,748 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:49:20,472 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-20 05:49:20,472 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 05:49:20,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1449554884] [2021-11-20 05:49:20,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1449554884] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:49:20,473 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:49:20,473 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-11-20 05:49:20,473 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052981857] [2021-11-20 05:49:20,473 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 05:49:20,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-20 05:49:20,474 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 05:49:20,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-20 05:49:20,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-11-20 05:49:20,479 INFO L87 Difference]: Start difference. First operand 70 states and 86 transitions. Second operand has 14 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-20 05:49:20,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:49:20,618 INFO L93 Difference]: Finished difference Result 77 states and 94 transitions. [2021-11-20 05:49:20,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-20 05:49:20,620 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 32 [2021-11-20 05:49:20,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:49:20,621 INFO L225 Difference]: With dead ends: 77 [2021-11-20 05:49:20,621 INFO L226 Difference]: Without dead ends: 73 [2021-11-20 05:49:20,622 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-11-20 05:49:20,623 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 13 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 26 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:49:20,623 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 144 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 26 Unchecked, 0.0s Time] [2021-11-20 05:49:20,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-11-20 05:49:20,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 68. [2021-11-20 05:49:20,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 53 states have (on average 1.2452830188679245) internal successors, (66), 53 states have internal predecessors, (66), 9 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-20 05:49:20,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 84 transitions. [2021-11-20 05:49:20,636 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 84 transitions. Word has length 32 [2021-11-20 05:49:20,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:49:20,636 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 84 transitions. [2021-11-20 05:49:20,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-20 05:49:20,637 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 84 transitions. [2021-11-20 05:49:20,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-20 05:49:20,638 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:49:20,638 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:49:20,650 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-11-20 05:49:20,850 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 05:49:20,852 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:49:20,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:49:20,853 INFO L85 PathProgramCache]: Analyzing trace with hash 1481418797, now seen corresponding path program 1 times [2021-11-20 05:49:20,854 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:49:20,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2099665996] [2021-11-20 05:49:20,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:49:20,856 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:49:20,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:49:20,861 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:49:20,864 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-20 05:49:20,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:49:20,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-20 05:49:20,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:49:21,436 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-20 05:49:21,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:49:22,128 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-20 05:49:22,128 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 05:49:22,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2099665996] [2021-11-20 05:49:22,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2099665996] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:49:22,129 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:49:22,129 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-11-20 05:49:22,129 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925924744] [2021-11-20 05:49:22,129 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 05:49:22,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-20 05:49:22,130 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 05:49:22,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-20 05:49:22,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-11-20 05:49:22,131 INFO L87 Difference]: Start difference. First operand 68 states and 84 transitions. Second operand has 14 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-20 05:49:22,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:49:22,454 INFO L93 Difference]: Finished difference Result 92 states and 114 transitions. [2021-11-20 05:49:22,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-20 05:49:22,455 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 32 [2021-11-20 05:49:22,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:49:22,457 INFO L225 Difference]: With dead ends: 92 [2021-11-20 05:49:22,457 INFO L226 Difference]: Without dead ends: 88 [2021-11-20 05:49:22,458 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-11-20 05:49:22,459 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 28 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 56 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:49:22,459 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 135 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 35 Invalid, 0 Unknown, 56 Unchecked, 0.1s Time] [2021-11-20 05:49:22,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-11-20 05:49:22,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 84. [2021-11-20 05:49:22,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 66 states have (on average 1.2575757575757576) internal successors, (83), 66 states have internal predecessors, (83), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-11-20 05:49:22,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 105 transitions. [2021-11-20 05:49:22,474 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 105 transitions. Word has length 32 [2021-11-20 05:49:22,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:49:22,474 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 105 transitions. [2021-11-20 05:49:22,475 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-20 05:49:22,475 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 105 transitions. [2021-11-20 05:49:22,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-20 05:49:22,477 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:49:22,477 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:49:22,496 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-20 05:49:22,689 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 05:49:22,690 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:49:22,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:49:22,690 INFO L85 PathProgramCache]: Analyzing trace with hash 672072171, now seen corresponding path program 1 times [2021-11-20 05:49:22,691 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:49:22,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1352091037] [2021-11-20 05:49:22,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:49:22,691 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:49:22,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:49:22,692 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:49:22,693 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-20 05:49:22,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:49:22,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-20 05:49:22,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:49:23,280 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-20 05:49:23,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:49:23,887 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-20 05:49:23,888 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 05:49:23,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1352091037] [2021-11-20 05:49:23,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1352091037] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:49:23,888 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:49:23,888 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-11-20 05:49:23,889 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684883741] [2021-11-20 05:49:23,889 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 05:49:23,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-20 05:49:23,890 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 05:49:23,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-20 05:49:23,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-11-20 05:49:23,891 INFO L87 Difference]: Start difference. First operand 84 states and 105 transitions. Second operand has 14 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-20 05:49:23,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:49:23,999 INFO L93 Difference]: Finished difference Result 112 states and 138 transitions. [2021-11-20 05:49:24,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-20 05:49:24,001 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 32 [2021-11-20 05:49:24,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:49:24,002 INFO L225 Difference]: With dead ends: 112 [2021-11-20 05:49:24,002 INFO L226 Difference]: Without dead ends: 108 [2021-11-20 05:49:24,003 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-11-20 05:49:24,004 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 27 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:49:24,005 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 174 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 36 Unchecked, 0.0s Time] [2021-11-20 05:49:24,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-11-20 05:49:24,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 104. [2021-11-20 05:49:24,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 80 states have (on average 1.25) internal successors, (100), 80 states have internal predecessors, (100), 15 states have call successors, (15), 8 states have call predecessors, (15), 8 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-11-20 05:49:24,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 130 transitions. [2021-11-20 05:49:24,022 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 130 transitions. Word has length 32 [2021-11-20 05:49:24,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:49:24,023 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 130 transitions. [2021-11-20 05:49:24,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-20 05:49:24,024 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 130 transitions. [2021-11-20 05:49:24,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-20 05:49:24,026 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:49:24,026 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:49:24,037 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-11-20 05:49:24,237 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 05:49:24,237 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:49:24,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:49:24,237 INFO L85 PathProgramCache]: Analyzing trace with hash 317605125, now seen corresponding path program 1 times [2021-11-20 05:49:24,238 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:49:24,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1818929677] [2021-11-20 05:49:24,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:49:24,238 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:49:24,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:49:24,239 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:49:24,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-20 05:49:24,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:49:24,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 05:49:24,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:49:24,558 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 05:49:24,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:49:24,824 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 05:49:24,824 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 05:49:24,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1818929677] [2021-11-20 05:49:24,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1818929677] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-20 05:49:24,824 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 05:49:24,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 11 [2021-11-20 05:49:24,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545302315] [2021-11-20 05:49:24,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:49:24,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 05:49:24,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 05:49:24,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 05:49:24,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-11-20 05:49:24,826 INFO L87 Difference]: Start difference. First operand 104 states and 130 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-20 05:49:24,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:49:24,833 INFO L93 Difference]: Finished difference Result 124 states and 154 transitions. [2021-11-20 05:49:24,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 05:49:24,834 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 34 [2021-11-20 05:49:24,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:49:24,835 INFO L225 Difference]: With dead ends: 124 [2021-11-20 05:49:24,835 INFO L226 Difference]: Without dead ends: 69 [2021-11-20 05:49:24,836 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-11-20 05:49:24,837 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 2 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 67 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:49:24,837 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 93 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 67 Unchecked, 0.0s Time] [2021-11-20 05:49:24,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-11-20 05:49:24,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2021-11-20 05:49:24,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 54 states have (on average 1.2407407407407407) internal successors, (67), 54 states have internal predecessors, (67), 9 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-20 05:49:24,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 85 transitions. [2021-11-20 05:49:24,847 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 85 transitions. Word has length 34 [2021-11-20 05:49:24,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:49:24,848 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 85 transitions. [2021-11-20 05:49:24,848 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-20 05:49:24,848 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 85 transitions. [2021-11-20 05:49:24,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-20 05:49:24,849 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:49:24,850 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:49:24,867 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-20 05:49:25,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 05:49:25,064 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:49:25,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:49:25,065 INFO L85 PathProgramCache]: Analyzing trace with hash 1699065963, now seen corresponding path program 1 times [2021-11-20 05:49:25,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:49:25,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1947466507] [2021-11-20 05:49:25,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:49:25,065 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:49:25,066 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:49:25,067 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:49:25,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-20 05:49:25,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:49:25,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-20 05:49:25,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:49:25,667 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 05:49:25,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:49:26,270 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 05:49:26,270 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 05:49:26,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1947466507] [2021-11-20 05:49:26,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1947466507] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:49:26,271 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:49:26,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-11-20 05:49:26,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889940317] [2021-11-20 05:49:26,271 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 05:49:26,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-20 05:49:26,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 05:49:26,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-20 05:49:26,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-11-20 05:49:26,274 INFO L87 Difference]: Start difference. First operand 69 states and 85 transitions. Second operand has 14 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-20 05:49:26,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:49:26,480 INFO L93 Difference]: Finished difference Result 89 states and 109 transitions. [2021-11-20 05:49:26,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-20 05:49:26,481 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 34 [2021-11-20 05:49:26,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:49:26,482 INFO L225 Difference]: With dead ends: 89 [2021-11-20 05:49:26,483 INFO L226 Difference]: Without dead ends: 85 [2021-11-20 05:49:26,483 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-11-20 05:49:26,484 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 47 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 56 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:49:26,484 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 127 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 37 Invalid, 0 Unknown, 56 Unchecked, 0.1s Time] [2021-11-20 05:49:26,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-11-20 05:49:26,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 69. [2021-11-20 05:49:26,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 54 states have (on average 1.2407407407407407) internal successors, (67), 54 states have internal predecessors, (67), 9 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-20 05:49:26,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 85 transitions. [2021-11-20 05:49:26,500 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 85 transitions. Word has length 34 [2021-11-20 05:49:26,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:49:26,501 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 85 transitions. [2021-11-20 05:49:26,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-20 05:49:26,502 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 85 transitions. [2021-11-20 05:49:26,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-20 05:49:26,508 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:49:26,508 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:49:26,519 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-20 05:49:26,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 05:49:26,711 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:49:26,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:49:26,712 INFO L85 PathProgramCache]: Analyzing trace with hash 889719337, now seen corresponding path program 1 times [2021-11-20 05:49:26,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:49:26,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [242998603] [2021-11-20 05:49:26,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:49:26,713 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:49:26,713 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:49:26,713 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:49:26,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-20 05:49:26,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:49:26,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-20 05:49:26,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:49:27,220 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 05:49:27,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:49:27,774 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 05:49:27,774 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 05:49:27,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [242998603] [2021-11-20 05:49:27,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [242998603] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:49:27,775 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:49:27,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-11-20 05:49:27,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473234238] [2021-11-20 05:49:27,775 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 05:49:27,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-20 05:49:27,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 05:49:27,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-20 05:49:27,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-11-20 05:49:27,777 INFO L87 Difference]: Start difference. First operand 69 states and 85 transitions. Second operand has 14 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-20 05:49:28,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:49:28,015 INFO L93 Difference]: Finished difference Result 98 states and 120 transitions. [2021-11-20 05:49:28,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-20 05:49:28,016 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 34 [2021-11-20 05:49:28,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:49:28,018 INFO L225 Difference]: With dead ends: 98 [2021-11-20 05:49:28,018 INFO L226 Difference]: Without dead ends: 94 [2021-11-20 05:49:28,018 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-11-20 05:49:28,019 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 47 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:49:28,020 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 104 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 30 Invalid, 0 Unknown, 31 Unchecked, 0.1s Time] [2021-11-20 05:49:28,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-11-20 05:49:28,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 66. [2021-11-20 05:49:28,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 51 states have (on average 1.2156862745098038) internal successors, (62), 51 states have internal predecessors, (62), 9 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-20 05:49:28,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 80 transitions. [2021-11-20 05:49:28,037 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 80 transitions. Word has length 34 [2021-11-20 05:49:28,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:49:28,037 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 80 transitions. [2021-11-20 05:49:28,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-20 05:49:28,038 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 80 transitions. [2021-11-20 05:49:28,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-20 05:49:28,039 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:49:28,040 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:49:28,051 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-20 05:49:28,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 05:49:28,263 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:49:28,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:49:28,263 INFO L85 PathProgramCache]: Analyzing trace with hash -712222617, now seen corresponding path program 1 times [2021-11-20 05:49:28,263 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:49:28,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1845076499] [2021-11-20 05:49:28,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:49:28,264 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:49:28,264 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:49:28,264 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:49:28,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-20 05:49:28,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:49:28,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-20 05:49:28,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:49:28,895 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 05:49:28,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:49:29,551 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 05:49:29,552 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 05:49:29,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1845076499] [2021-11-20 05:49:29,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1845076499] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:49:29,552 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:49:29,552 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-11-20 05:49:29,552 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099052737] [2021-11-20 05:49:29,552 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 05:49:29,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-20 05:49:29,553 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 05:49:29,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-20 05:49:29,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-11-20 05:49:29,554 INFO L87 Difference]: Start difference. First operand 66 states and 80 transitions. Second operand has 14 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 states have internal predecessors, (50), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-20 05:49:29,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:49:29,717 INFO L93 Difference]: Finished difference Result 98 states and 120 transitions. [2021-11-20 05:49:29,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-20 05:49:29,720 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 states have internal predecessors, (50), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 35 [2021-11-20 05:49:29,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:49:29,721 INFO L225 Difference]: With dead ends: 98 [2021-11-20 05:49:29,721 INFO L226 Difference]: Without dead ends: 94 [2021-11-20 05:49:29,722 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-11-20 05:49:29,723 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 16 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:49:29,724 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 142 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 36 Unchecked, 0.1s Time] [2021-11-20 05:49:29,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-11-20 05:49:29,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2021-11-20 05:49:29,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 72 states have (on average 1.2361111111111112) internal successors, (89), 72 states have internal predecessors, (89), 13 states have call successors, (13), 7 states have call predecessors, (13), 7 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-11-20 05:49:29,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 115 transitions. [2021-11-20 05:49:29,749 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 115 transitions. Word has length 35 [2021-11-20 05:49:29,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:49:29,749 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 115 transitions. [2021-11-20 05:49:29,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 states have internal predecessors, (50), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-20 05:49:29,750 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 115 transitions. [2021-11-20 05:49:29,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-20 05:49:29,753 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:49:29,753 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:49:29,770 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-20 05:49:29,966 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 05:49:29,966 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:49:29,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:49:29,967 INFO L85 PathProgramCache]: Analyzing trace with hash -11158039, now seen corresponding path program 1 times [2021-11-20 05:49:29,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:49:29,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1125127382] [2021-11-20 05:49:29,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:49:29,968 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:49:29,968 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:49:29,968 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:49:29,969 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-20 05:49:30,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:49:30,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-20 05:49:30,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:49:30,490 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 05:49:30,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:49:31,050 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 05:49:31,050 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 05:49:31,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1125127382] [2021-11-20 05:49:31,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1125127382] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:49:31,051 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:49:31,051 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-11-20 05:49:31,051 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124247774] [2021-11-20 05:49:31,051 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 05:49:31,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-20 05:49:31,051 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 05:49:31,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-20 05:49:31,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-11-20 05:49:31,052 INFO L87 Difference]: Start difference. First operand 93 states and 115 transitions. Second operand has 14 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 states have internal predecessors, (50), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-20 05:49:31,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:49:31,282 INFO L93 Difference]: Finished difference Result 115 states and 142 transitions. [2021-11-20 05:49:31,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-20 05:49:31,284 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 states have internal predecessors, (50), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 35 [2021-11-20 05:49:31,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:49:31,285 INFO L225 Difference]: With dead ends: 115 [2021-11-20 05:49:31,285 INFO L226 Difference]: Without dead ends: 111 [2021-11-20 05:49:31,286 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-11-20 05:49:31,287 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 17 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 46 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 05:49:31,287 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 150 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 32 Invalid, 0 Unknown, 46 Unchecked, 0.2s Time] [2021-11-20 05:49:31,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-11-20 05:49:31,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 104. [2021-11-20 05:49:31,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 80 states have (on average 1.2375) internal successors, (99), 80 states have internal predecessors, (99), 15 states have call successors, (15), 8 states have call predecessors, (15), 8 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-11-20 05:49:31,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 129 transitions. [2021-11-20 05:49:31,300 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 129 transitions. Word has length 35 [2021-11-20 05:49:31,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:49:31,301 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 129 transitions. [2021-11-20 05:49:31,301 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 states have internal predecessors, (50), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-20 05:49:31,301 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 129 transitions. [2021-11-20 05:49:31,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-20 05:49:31,302 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:49:31,303 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:49:31,316 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-20 05:49:31,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 05:49:31,511 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:49:31,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:49:31,511 INFO L85 PathProgramCache]: Analyzing trace with hash -1385877079, now seen corresponding path program 1 times [2021-11-20 05:49:31,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:49:31,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1134658743] [2021-11-20 05:49:31,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:49:31,512 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:49:31,512 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:49:31,513 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:49:31,515 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-20 05:49:31,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:49:31,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 05:49:31,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:49:31,842 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 05:49:31,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:49:32,066 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 05:49:32,066 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 05:49:32,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1134658743] [2021-11-20 05:49:32,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1134658743] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-20 05:49:32,066 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 05:49:32,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 11 [2021-11-20 05:49:32,067 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770914565] [2021-11-20 05:49:32,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:49:32,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 05:49:32,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 05:49:32,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 05:49:32,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-11-20 05:49:32,068 INFO L87 Difference]: Start difference. First operand 104 states and 129 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-20 05:49:32,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:49:32,075 INFO L93 Difference]: Finished difference Result 162 states and 202 transitions. [2021-11-20 05:49:32,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 05:49:32,076 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 37 [2021-11-20 05:49:32,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:49:32,077 INFO L225 Difference]: With dead ends: 162 [2021-11-20 05:49:32,077 INFO L226 Difference]: Without dead ends: 67 [2021-11-20 05:49:32,078 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-11-20 05:49:32,078 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 2 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:49:32,079 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 79 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 37 Unchecked, 0.0s Time] [2021-11-20 05:49:32,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-11-20 05:49:32,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2021-11-20 05:49:32,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 52 states have (on average 1.2115384615384615) internal successors, (63), 52 states have internal predecessors, (63), 9 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-20 05:49:32,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 81 transitions. [2021-11-20 05:49:32,087 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 81 transitions. Word has length 37 [2021-11-20 05:49:32,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:49:32,088 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 81 transitions. [2021-11-20 05:49:32,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-20 05:49:32,088 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 81 transitions. [2021-11-20 05:49:32,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-20 05:49:32,089 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:49:32,089 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:49:32,102 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-20 05:49:32,301 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 05:49:32,302 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:49:32,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:49:32,302 INFO L85 PathProgramCache]: Analyzing trace with hash 2108850025, now seen corresponding path program 1 times [2021-11-20 05:49:32,302 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:49:32,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [313393302] [2021-11-20 05:49:32,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:49:32,303 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:49:32,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:49:32,304 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:49:32,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-20 05:49:32,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:49:32,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-20 05:49:32,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:49:32,835 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-20 05:49:32,835 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:49:33,365 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-20 05:49:33,365 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 05:49:33,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [313393302] [2021-11-20 05:49:33,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [313393302] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:49:33,365 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:49:33,365 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-11-20 05:49:33,365 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018292876] [2021-11-20 05:49:33,365 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 05:49:33,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-20 05:49:33,366 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 05:49:33,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-20 05:49:33,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-11-20 05:49:33,367 INFO L87 Difference]: Start difference. First operand 67 states and 81 transitions. Second operand has 14 states, 13 states have (on average 4.153846153846154) internal successors, (54), 13 states have internal predecessors, (54), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-20 05:49:33,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:49:33,500 INFO L93 Difference]: Finished difference Result 76 states and 91 transitions. [2021-11-20 05:49:33,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-20 05:49:33,502 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 4.153846153846154) internal successors, (54), 13 states have internal predecessors, (54), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 37 [2021-11-20 05:49:33,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:49:33,503 INFO L225 Difference]: With dead ends: 76 [2021-11-20 05:49:33,503 INFO L226 Difference]: Without dead ends: 72 [2021-11-20 05:49:33,503 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-11-20 05:49:33,504 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 40 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:49:33,504 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 118 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 39 Unchecked, 0.1s Time] [2021-11-20 05:49:33,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-11-20 05:49:33,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2021-11-20 05:49:33,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 56 states have (on average 1.2142857142857142) internal successors, (68), 56 states have internal predecessors, (68), 9 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-20 05:49:33,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 86 transitions. [2021-11-20 05:49:33,514 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 86 transitions. Word has length 37 [2021-11-20 05:49:33,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:49:33,514 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 86 transitions. [2021-11-20 05:49:33,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 4.153846153846154) internal successors, (54), 13 states have internal predecessors, (54), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-20 05:49:33,515 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 86 transitions. [2021-11-20 05:49:33,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-20 05:49:33,515 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:49:33,516 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:49:33,526 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-20 05:49:33,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 05:49:33,723 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:49:33,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:49:33,723 INFO L85 PathProgramCache]: Analyzing trace with hash -1485052693, now seen corresponding path program 1 times [2021-11-20 05:49:33,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:49:33,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1780611295] [2021-11-20 05:49:33,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:49:33,724 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:49:33,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:49:33,725 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:49:33,726 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-20 05:49:33,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:49:33,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-20 05:49:33,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:49:34,246 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-20 05:49:34,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:49:34,786 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-20 05:49:34,786 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 05:49:34,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1780611295] [2021-11-20 05:49:34,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1780611295] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:49:34,786 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:49:34,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-11-20 05:49:34,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806478442] [2021-11-20 05:49:34,786 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 05:49:34,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-20 05:49:34,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 05:49:34,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-20 05:49:34,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-11-20 05:49:34,788 INFO L87 Difference]: Start difference. First operand 71 states and 86 transitions. Second operand has 14 states, 13 states have (on average 4.153846153846154) internal successors, (54), 13 states have internal predecessors, (54), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-20 05:49:35,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:49:35,000 INFO L93 Difference]: Finished difference Result 80 states and 97 transitions. [2021-11-20 05:49:35,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-20 05:49:35,001 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 4.153846153846154) internal successors, (54), 13 states have internal predecessors, (54), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 37 [2021-11-20 05:49:35,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:49:35,002 INFO L225 Difference]: With dead ends: 80 [2021-11-20 05:49:35,002 INFO L226 Difference]: Without dead ends: 76 [2021-11-20 05:49:35,002 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-11-20 05:49:35,003 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 19 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 46 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:49:35,003 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 163 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 32 Invalid, 0 Unknown, 46 Unchecked, 0.1s Time] [2021-11-20 05:49:35,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-11-20 05:49:35,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 69. [2021-11-20 05:49:35,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 54 states have (on average 1.2222222222222223) internal successors, (66), 54 states have internal predecessors, (66), 9 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-20 05:49:35,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 84 transitions. [2021-11-20 05:49:35,012 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 84 transitions. Word has length 37 [2021-11-20 05:49:35,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:49:35,012 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 84 transitions. [2021-11-20 05:49:35,012 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 4.153846153846154) internal successors, (54), 13 states have internal predecessors, (54), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-20 05:49:35,012 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 84 transitions. [2021-11-20 05:49:35,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-20 05:49:35,013 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:49:35,013 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:49:35,023 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-20 05:49:35,213 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 05:49:35,213 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:49:35,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:49:35,214 INFO L85 PathProgramCache]: Analyzing trace with hash -459431893, now seen corresponding path program 1 times [2021-11-20 05:49:35,214 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:49:35,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [477352162] [2021-11-20 05:49:35,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:49:35,214 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:49:35,214 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:49:35,217 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:49:35,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-20 05:49:35,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:49:35,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-20 05:49:35,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:49:36,082 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 05:49:36,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:49:42,728 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 05:49:42,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [477352162] [2021-11-20 05:49:42,728 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: not dual finite connective [2021-11-20 05:49:42,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [35260524] [2021-11-20 05:49:42,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:49:42,729 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-20 05:49:42,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/cvc4 [2021-11-20 05:49:42,731 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-20 05:49:42,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-20 05:49:42,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:49:42,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-20 05:49:42,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:49:43,303 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 05:49:43,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:49:49,325 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: not dual finite connective [2021-11-20 05:49:49,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525429548] [2021-11-20 05:49:49,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:49:49,325 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:49:49,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:49:49,327 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:49:49,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-20 05:49:49,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:49:49,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-20 05:49:49,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:49:50,051 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 05:49:50,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:50:28,498 WARN L860 $PredicateComparison]: unable to prove that (or (forall ((|ULTIMATE.start_main_~index2~0#1| (_ BitVec 16)) (|v_ULTIMATE.start_main_~index1~0#1_BEFORE_CALL_7| (_ BitVec 16))) (let ((.cse2 ((_ sign_extend 16) |v_ULTIMATE.start_main_~index1~0#1_BEFORE_CALL_7|)) (.cse3 ((_ sign_extend 16) |ULTIMATE.start_main_~index2~0#1|))) (or (let ((.cse0 (bvsge .cse2 (_ bv0 32))) (.cse1 (bvslt ((_ sign_extend 32) .cse2) c_~ARR_SIZE~0))) (and (or (not .cse0) (not (= |c_assume_abort_if_not_#in~cond| (_ bv1 32))) (not .cse1)) (or (not (= |c_assume_abort_if_not_#in~cond| (_ bv0 32))) (and .cse0 .cse1)))) (not (bvslt ((_ sign_extend 32) .cse3) c_~ARR_SIZE~0)) (let ((.cse4 ((_ sign_extend 32) (bvadd .cse2 .cse3)))) (and (not (= c_~ARR_SIZE~0 (bvadd .cse4 (_ bv2 64)))) (not (= .cse4 c_~ARR_SIZE~0)))) (not (bvsge .cse3 (_ bv0 32)))))) (exists ((|ULTIMATE.start_main_~index1~0#1| (_ BitVec 16))) (let ((.cse5 ((_ sign_extend 16) |ULTIMATE.start_main_~index1~0#1|))) (and (bvsge .cse5 (_ bv0 32)) (exists ((|ULTIMATE.start_main_~index2~0#1| (_ BitVec 16))) (let ((.cse6 ((_ sign_extend 16) |ULTIMATE.start_main_~index2~0#1|))) (and (bvsge .cse6 (_ bv0 32)) (bvslt ((_ sign_extend 32) .cse6) c_~ARR_SIZE~0) (let ((.cse7 ((_ sign_extend 32) (bvadd ((_ sign_extend 16) |ULTIMATE.start_main_~index1~0#1|) .cse6)))) (or (= (bvadd (_ bv2 64) .cse7) c_~ARR_SIZE~0) (= c_~ARR_SIZE~0 .cse7)))))) (bvslt ((_ sign_extend 32) .cse5) c_~ARR_SIZE~0))))) is different from true [2021-11-20 05:50:34,012 WARN L860 $PredicateComparison]: unable to prove that (or (forall ((|ULTIMATE.start_main_~index2~0#1| (_ BitVec 16)) (|v_ULTIMATE.start_main_~index1~0#1_BEFORE_CALL_7| (_ BitVec 16))) (let ((.cse2 ((_ sign_extend 16) |v_ULTIMATE.start_main_~index1~0#1_BEFORE_CALL_7|)) (.cse3 ((_ sign_extend 16) |ULTIMATE.start_main_~index2~0#1|))) (or (let ((.cse0 (bvsge .cse2 (_ bv0 32))) (.cse1 (bvslt ((_ sign_extend 32) .cse2) c_~ARR_SIZE~0))) (and (or (not .cse0) (not (= |c_assume_abort_if_not_#in~cond| (_ bv1 32))) (not .cse1)) (or (not (= |c_assume_abort_if_not_#in~cond| (_ bv0 32))) (and .cse0 .cse1)))) (not (bvslt ((_ sign_extend 32) .cse3) c_~ARR_SIZE~0)) (let ((.cse4 ((_ sign_extend 32) (bvadd .cse2 .cse3)))) (and (not (= c_~ARR_SIZE~0 (bvadd .cse4 (_ bv2 64)))) (not (= .cse4 c_~ARR_SIZE~0)))) (not (bvsge .cse3 (_ bv0 32)))))) (exists ((|ULTIMATE.start_main_~index1~0#1| (_ BitVec 16))) (let ((.cse5 ((_ sign_extend 16) |ULTIMATE.start_main_~index1~0#1|))) (and (bvsge .cse5 (_ bv0 32)) (exists ((|ULTIMATE.start_main_~index2~0#1| (_ BitVec 16))) (let ((.cse6 ((_ sign_extend 16) |ULTIMATE.start_main_~index2~0#1|))) (and (bvsge .cse6 (_ bv0 32)) (bvslt ((_ sign_extend 32) .cse6) c_~ARR_SIZE~0) (let ((.cse7 ((_ sign_extend 32) (bvadd ((_ sign_extend 16) |ULTIMATE.start_main_~index1~0#1|) .cse6)))) (or (= (bvadd (_ bv2 64) .cse7) c_~ARR_SIZE~0) (= c_~ARR_SIZE~0 .cse7)))))) (bvslt ((_ sign_extend 32) .cse5) c_~ARR_SIZE~0)))) (= c_assume_abort_if_not_~cond (_ bv0 32))) is different from true [2021-11-20 05:50:37,887 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 3 not checked. [2021-11-20 05:50:37,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525429548] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:50:37,887 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:50:37,888 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2021-11-20 05:50:37,888 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783786539] [2021-11-20 05:50:37,888 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 05:50:37,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-20 05:50:37,888 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 05:50:37,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-20 05:50:37,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=673, Unknown=3, NotChecked=110, Total=930 [2021-11-20 05:50:37,889 INFO L87 Difference]: Start difference. First operand 69 states and 84 transitions. Second operand has 24 states, 22 states have (on average 2.227272727272727) internal successors, (49), 19 states have internal predecessors, (49), 5 states have call successors, (5), 2 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-20 05:50:45,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:50:45,943 INFO L93 Difference]: Finished difference Result 198 states and 246 transitions. [2021-11-20 05:50:45,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-20 05:50:45,944 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 2.227272727272727) internal successors, (49), 19 states have internal predecessors, (49), 5 states have call successors, (5), 2 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 39 [2021-11-20 05:50:45,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:50:45,948 INFO L225 Difference]: With dead ends: 198 [2021-11-20 05:50:45,948 INFO L226 Difference]: Without dead ends: 139 [2021-11-20 05:50:45,949 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 152 SyntacticMatches, 9 SemanticMatches, 39 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 20.3s TimeCoverageRelationStatistics Valid=250, Invalid=1237, Unknown=3, NotChecked=150, Total=1640 [2021-11-20 05:50:45,950 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 110 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 360 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 295 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:50:45,951 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 240 Invalid, 698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 360 Invalid, 0 Unknown, 295 Unchecked, 1.0s Time] [2021-11-20 05:50:45,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-11-20 05:50:45,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 95. [2021-11-20 05:50:45,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 77 states have (on average 1.2077922077922079) internal successors, (93), 79 states have internal predecessors, (93), 10 states have call successors, (10), 7 states have call predecessors, (10), 7 states have return successors, (10), 8 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-20 05:50:45,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 113 transitions. [2021-11-20 05:50:45,963 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 113 transitions. Word has length 39 [2021-11-20 05:50:45,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:50:45,964 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 113 transitions. [2021-11-20 05:50:45,964 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 2.227272727272727) internal successors, (49), 19 states have internal predecessors, (49), 5 states have call successors, (5), 2 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-20 05:50:45,964 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 113 transitions. [2021-11-20 05:50:45,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-20 05:50:45,965 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:50:45,965 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:50:45,975 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-20 05:50:46,198 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-20 05:50:46,376 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-11-20 05:50:46,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/cvc4 --incremental --print-success --lang smt [2021-11-20 05:50:46,571 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:50:46,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:50:46,572 INFO L85 PathProgramCache]: Analyzing trace with hash -1046237907, now seen corresponding path program 1 times [2021-11-20 05:50:46,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:50:46,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1698526908] [2021-11-20 05:50:46,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:50:46,573 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:50:46,573 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:50:46,574 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:50:46,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-20 05:50:46,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:50:46,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-20 05:50:46,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:50:47,024 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 15 treesize of output 11 [2021-11-20 05:50:48,807 INFO L354 Elim1Store]: treesize reduction 65, result has 4.4 percent of original size [2021-11-20 05:50:48,808 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 2 case distinctions, treesize of input 65 treesize of output 44 [2021-11-20 05:50:49,459 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 16 treesize of output 8 [2021-11-20 05:50:49,638 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 05:50:49,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:51:02,699 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 27 treesize of output 25 [2021-11-20 05:51:02,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 50 [2021-11-20 05:51:06,195 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 05:51:06,195 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 05:51:06,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1698526908] [2021-11-20 05:51:06,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1698526908] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:51:06,195 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:51:06,196 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 15] total 34 [2021-11-20 05:51:06,196 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216485540] [2021-11-20 05:51:06,196 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 05:51:06,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-20 05:51:06,197 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 05:51:06,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-20 05:51:06,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=902, Unknown=0, NotChecked=0, Total=1122 [2021-11-20 05:51:06,198 INFO L87 Difference]: Start difference. First operand 95 states and 113 transitions. Second operand has 34 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 31 states have internal predecessors, (58), 5 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-20 05:51:08,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:51:08,556 INFO L93 Difference]: Finished difference Result 154 states and 185 transitions. [2021-11-20 05:51:08,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-20 05:51:08,560 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 31 states have internal predecessors, (58), 5 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 39 [2021-11-20 05:51:08,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:51:08,561 INFO L225 Difference]: With dead ends: 154 [2021-11-20 05:51:08,562 INFO L226 Difference]: Without dead ends: 141 [2021-11-20 05:51:08,563 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 514 ImplicationChecksByTransitivity, 18.0s TimeCoverageRelationStatistics Valid=269, Invalid=1137, Unknown=0, NotChecked=0, Total=1406 [2021-11-20 05:51:08,563 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 89 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 195 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:51:08,564 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 254 Invalid, 334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 133 Invalid, 0 Unknown, 195 Unchecked, 1.1s Time] [2021-11-20 05:51:08,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-11-20 05:51:08,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 128. [2021-11-20 05:51:08,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 103 states have (on average 1.1941747572815533) internal successors, (123), 105 states have internal predecessors, (123), 14 states have call successors, (14), 10 states have call predecessors, (14), 10 states have return successors, (14), 12 states have call predecessors, (14), 14 states have call successors, (14) [2021-11-20 05:51:08,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 151 transitions. [2021-11-20 05:51:08,580 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 151 transitions. Word has length 39 [2021-11-20 05:51:08,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:51:08,580 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 151 transitions. [2021-11-20 05:51:08,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 31 states have internal predecessors, (58), 5 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-20 05:51:08,581 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 151 transitions. [2021-11-20 05:51:08,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-20 05:51:08,582 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:51:08,582 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2021-11-20 05:51:08,603 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-20 05:51:08,794 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 05:51:08,794 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:51:08,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:51:08,795 INFO L85 PathProgramCache]: Analyzing trace with hash -252023569, now seen corresponding path program 2 times [2021-11-20 05:51:08,795 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:51:08,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1259486829] [2021-11-20 05:51:08,795 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 05:51:08,795 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:51:08,795 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:51:08,796 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:51:08,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-20 05:51:08,923 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 05:51:08,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:51:08,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-20 05:51:08,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:51:09,912 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 05:51:09,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:51:10,413 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-20 05:51:10,413 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 05:51:10,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1259486829] [2021-11-20 05:51:10,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1259486829] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:51:10,414 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:51:10,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 16 [2021-11-20 05:51:10,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198519021] [2021-11-20 05:51:10,415 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 05:51:10,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-20 05:51:10,419 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 05:51:10,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-20 05:51:10,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-11-20 05:51:10,420 INFO L87 Difference]: Start difference. First operand 128 states and 151 transitions. Second operand has 16 states, 16 states have (on average 3.5625) internal successors, (57), 16 states have internal predecessors, (57), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-20 05:51:10,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:51:10,672 INFO L93 Difference]: Finished difference Result 160 states and 194 transitions. [2021-11-20 05:51:10,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-20 05:51:10,673 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 16 states have internal predecessors, (57), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) Word has length 41 [2021-11-20 05:51:10,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:51:10,675 INFO L225 Difference]: With dead ends: 160 [2021-11-20 05:51:10,675 INFO L226 Difference]: Without dead ends: 156 [2021-11-20 05:51:10,675 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2021-11-20 05:51:10,675 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 16 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:51:10,676 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 139 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 52 Unchecked, 0.1s Time] [2021-11-20 05:51:10,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-11-20 05:51:10,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 146. [2021-11-20 05:51:10,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 121 states have (on average 1.2314049586776858) internal successors, (149), 123 states have internal predecessors, (149), 14 states have call successors, (14), 10 states have call predecessors, (14), 10 states have return successors, (14), 12 states have call predecessors, (14), 14 states have call successors, (14) [2021-11-20 05:51:10,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 177 transitions. [2021-11-20 05:51:10,696 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 177 transitions. Word has length 41 [2021-11-20 05:51:10,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:51:10,696 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 177 transitions. [2021-11-20 05:51:10,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 16 states have internal predecessors, (57), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-20 05:51:10,696 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 177 transitions. [2021-11-20 05:51:10,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-20 05:51:10,697 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:51:10,697 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2021-11-20 05:51:10,713 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-20 05:51:10,897 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 05:51:10,898 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:51:10,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:51:10,898 INFO L85 PathProgramCache]: Analyzing trace with hash 796161581, now seen corresponding path program 2 times [2021-11-20 05:51:10,899 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:51:10,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1203097784] [2021-11-20 05:51:10,899 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 05:51:10,899 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:51:10,899 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:51:10,900 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:51:10,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-20 05:51:11,039 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 05:51:11,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:51:11,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-20 05:51:11,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:51:11,969 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-20 05:51:11,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:51:12,516 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-20 05:51:12,516 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 05:51:12,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1203097784] [2021-11-20 05:51:12,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1203097784] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:51:12,516 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:51:12,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 16 [2021-11-20 05:51:12,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975038763] [2021-11-20 05:51:12,517 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 05:51:12,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-20 05:51:12,517 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 05:51:12,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-20 05:51:12,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-11-20 05:51:12,519 INFO L87 Difference]: Start difference. First operand 146 states and 177 transitions. Second operand has 16 states, 16 states have (on average 3.5625) internal successors, (57), 16 states have internal predecessors, (57), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-20 05:51:13,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:51:13,868 INFO L93 Difference]: Finished difference Result 307 states and 378 transitions. [2021-11-20 05:51:13,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-20 05:51:13,869 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 16 states have internal predecessors, (57), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 41 [2021-11-20 05:51:13,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:51:13,872 INFO L225 Difference]: With dead ends: 307 [2021-11-20 05:51:13,872 INFO L226 Difference]: Without dead ends: 303 [2021-11-20 05:51:13,873 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=137, Invalid=415, Unknown=0, NotChecked=0, Total=552 [2021-11-20 05:51:13,873 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 106 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 266 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-20 05:51:13,874 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 240 Invalid, 390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 104 Invalid, 0 Unknown, 266 Unchecked, 0.8s Time] [2021-11-20 05:51:13,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2021-11-20 05:51:13,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 223. [2021-11-20 05:51:13,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 181 states have (on average 1.2320441988950277) internal successors, (223), 186 states have internal predecessors, (223), 26 states have call successors, (26), 15 states have call predecessors, (26), 15 states have return successors, (26), 21 states have call predecessors, (26), 26 states have call successors, (26) [2021-11-20 05:51:13,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 275 transitions. [2021-11-20 05:51:13,898 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 275 transitions. Word has length 41 [2021-11-20 05:51:13,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:51:13,899 INFO L470 AbstractCegarLoop]: Abstraction has 223 states and 275 transitions. [2021-11-20 05:51:13,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 16 states have internal predecessors, (57), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-20 05:51:13,899 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 275 transitions. [2021-11-20 05:51:13,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-20 05:51:13,900 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:51:13,901 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 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] [2021-11-20 05:51:13,909 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-20 05:51:14,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 05:51:14,103 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:51:14,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:51:14,103 INFO L85 PathProgramCache]: Analyzing trace with hash 178867369, now seen corresponding path program 3 times [2021-11-20 05:51:14,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:51:14,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1411027765] [2021-11-20 05:51:14,104 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 05:51:14,104 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:51:14,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:51:14,105 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:51:14,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-20 05:51:14,221 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-20 05:51:14,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:51:14,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-20 05:51:14,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:51:15,266 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 05:51:15,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:51:16,056 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-20 05:51:16,056 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 05:51:16,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1411027765] [2021-11-20 05:51:16,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1411027765] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:51:16,057 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:51:16,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7] total 18 [2021-11-20 05:51:16,057 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426896907] [2021-11-20 05:51:16,057 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 05:51:16,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-20 05:51:16,058 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 05:51:16,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-20 05:51:16,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2021-11-20 05:51:16,059 INFO L87 Difference]: Start difference. First operand 223 states and 275 transitions. Second operand has 18 states, 18 states have (on average 3.388888888888889) internal successors, (61), 17 states have internal predecessors, (61), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-20 05:51:16,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:51:16,794 INFO L93 Difference]: Finished difference Result 397 states and 489 transitions. [2021-11-20 05:51:16,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-20 05:51:16,795 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.388888888888889) internal successors, (61), 17 states have internal predecessors, (61), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 44 [2021-11-20 05:51:16,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:51:16,798 INFO L225 Difference]: With dead ends: 397 [2021-11-20 05:51:16,798 INFO L226 Difference]: Without dead ends: 274 [2021-11-20 05:51:16,799 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2021-11-20 05:51:16,800 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 78 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 163 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-20 05:51:16,801 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 174 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 105 Invalid, 0 Unknown, 163 Unchecked, 0.6s Time] [2021-11-20 05:51:16,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2021-11-20 05:51:16,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 256. [2021-11-20 05:51:16,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 209 states have (on average 1.2248803827751196) internal successors, (256), 215 states have internal predecessors, (256), 29 states have call successors, (29), 17 states have call predecessors, (29), 17 states have return successors, (29), 23 states have call predecessors, (29), 29 states have call successors, (29) [2021-11-20 05:51:16,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 314 transitions. [2021-11-20 05:51:16,835 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 314 transitions. Word has length 44 [2021-11-20 05:51:16,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:51:16,836 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 314 transitions. [2021-11-20 05:51:16,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.388888888888889) internal successors, (61), 17 states have internal predecessors, (61), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-20 05:51:16,836 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 314 transitions. [2021-11-20 05:51:16,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-20 05:51:16,837 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:51:16,837 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 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] [2021-11-20 05:51:16,851 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-20 05:51:17,050 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 05:51:17,051 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:51:17,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:51:17,051 INFO L85 PathProgramCache]: Analyzing trace with hash 791501255, now seen corresponding path program 4 times [2021-11-20 05:51:17,051 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:51:17,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1725703732] [2021-11-20 05:51:17,051 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 05:51:17,051 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:51:17,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:51:17,052 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:51:17,053 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-20 05:51:17,124 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 05:51:17,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:51:17,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-20 05:51:17,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:51:17,846 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-20 05:51:17,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:51:18,354 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-20 05:51:18,354 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 05:51:18,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1725703732] [2021-11-20 05:51:18,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1725703732] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:51:18,354 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:51:18,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 16 [2021-11-20 05:51:18,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424505074] [2021-11-20 05:51:18,355 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 05:51:18,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-20 05:51:18,355 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 05:51:18,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-20 05:51:18,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-11-20 05:51:18,356 INFO L87 Difference]: Start difference. First operand 256 states and 314 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 15 states have internal predecessors, (46), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-20 05:51:19,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:51:19,231 INFO L93 Difference]: Finished difference Result 401 states and 498 transitions. [2021-11-20 05:51:19,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-20 05:51:19,233 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 15 states have internal predecessors, (46), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 44 [2021-11-20 05:51:19,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:51:19,235 INFO L225 Difference]: With dead ends: 401 [2021-11-20 05:51:19,235 INFO L226 Difference]: Without dead ends: 262 [2021-11-20 05:51:19,236 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2021-11-20 05:51:19,237 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 40 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 163 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-20 05:51:19,238 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 130 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 112 Invalid, 0 Unknown, 163 Unchecked, 0.7s Time] [2021-11-20 05:51:19,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-11-20 05:51:19,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 251. [2021-11-20 05:51:19,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 204 states have (on average 1.2058823529411764) internal successors, (246), 210 states have internal predecessors, (246), 29 states have call successors, (29), 17 states have call predecessors, (29), 17 states have return successors, (29), 23 states have call predecessors, (29), 29 states have call successors, (29) [2021-11-20 05:51:19,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 304 transitions. [2021-11-20 05:51:19,274 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 304 transitions. Word has length 44 [2021-11-20 05:51:19,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:51:19,274 INFO L470 AbstractCegarLoop]: Abstraction has 251 states and 304 transitions. [2021-11-20 05:51:19,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 15 states have internal predecessors, (46), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-20 05:51:19,274 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 304 transitions. [2021-11-20 05:51:19,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-20 05:51:19,275 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:51:19,276 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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] [2021-11-20 05:51:19,301 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-20 05:51:19,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 05:51:19,487 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:51:19,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:51:19,488 INFO L85 PathProgramCache]: Analyzing trace with hash 1788212485, now seen corresponding path program 5 times [2021-11-20 05:51:19,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:51:19,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1486608056] [2021-11-20 05:51:19,488 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-20 05:51:19,488 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:51:19,488 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:51:19,489 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:51:19,490 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-20 05:51:19,522 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-11-20 05:51:19,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:51:19,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 19 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-20 05:51:19,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:51:19,852 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 05:51:19,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:51:20,460 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-20 05:51:20,460 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 05:51:20,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1486608056] [2021-11-20 05:51:20,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1486608056] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:51:20,460 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:51:20,461 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-11-20 05:51:20,461 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48894292] [2021-11-20 05:51:20,461 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 05:51:20,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-20 05:51:20,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 05:51:20,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-20 05:51:20,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-11-20 05:51:20,462 INFO L87 Difference]: Start difference. First operand 251 states and 304 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 05:51:23,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:51:23,357 INFO L93 Difference]: Finished difference Result 555 states and 688 transitions. [2021-11-20 05:51:23,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-20 05:51:23,361 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 46 [2021-11-20 05:51:23,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:51:23,364 INFO L225 Difference]: With dead ends: 555 [2021-11-20 05:51:23,364 INFO L226 Difference]: Without dead ends: 425 [2021-11-20 05:51:23,365 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=222, Invalid=708, Unknown=0, NotChecked=0, Total=930 [2021-11-20 05:51:23,366 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 518 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 367 mSolverCounterSat, 190 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 518 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 190 IncrementalHoareTripleChecker+Valid, 367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-11-20 05:51:23,366 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [518 Valid, 225 Invalid, 557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [190 Valid, 367 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-11-20 05:51:23,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2021-11-20 05:51:23,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 233. [2021-11-20 05:51:23,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 194 states have (on average 1.175257731958763) internal successors, (228), 199 states have internal predecessors, (228), 22 states have call successors, (22), 16 states have call predecessors, (22), 16 states have return successors, (22), 17 states have call predecessors, (22), 22 states have call successors, (22) [2021-11-20 05:51:23,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 272 transitions. [2021-11-20 05:51:23,421 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 272 transitions. Word has length 46 [2021-11-20 05:51:23,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:51:23,421 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 272 transitions. [2021-11-20 05:51:23,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 05:51:23,422 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 272 transitions. [2021-11-20 05:51:23,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-20 05:51:23,423 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:51:23,423 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 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] [2021-11-20 05:51:23,438 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-20 05:51:23,634 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 05:51:23,634 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:51:23,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:51:23,635 INFO L85 PathProgramCache]: Analyzing trace with hash -1638340688, now seen corresponding path program 1 times [2021-11-20 05:51:23,635 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:51:23,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1306147245] [2021-11-20 05:51:23,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:51:23,636 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:51:23,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:51:23,636 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:51:23,671 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-20 05:51:23,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:51:23,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-20 05:51:23,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:51:25,173 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 28 proven. 7 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-20 05:51:25,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:51:29,932 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 05:51:29,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1306147245] [2021-11-20 05:51:29,932 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: not dual finite connective [2021-11-20 05:51:29,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [681664577] [2021-11-20 05:51:29,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:51:29,933 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-20 05:51:29,933 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/cvc4 [2021-11-20 05:51:29,938 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-20 05:51:29,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2021-11-20 05:51:30,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:51:30,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-20 05:51:30,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:51:30,918 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 33 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-20 05:51:30,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:52:01,543 WARN L860 $PredicateComparison]: unable to prove that (or (forall ((|ULTIMATE.start_main_~index2~0#1| (_ BitVec 16)) (|v_ULTIMATE.start_main_~index1~0#1_BEFORE_CALL_14| (_ BitVec 16))) (let ((.cse0 ((_ sign_extend 16) |ULTIMATE.start_main_~index2~0#1|)) (.cse2 ((_ sign_extend 16) |v_ULTIMATE.start_main_~index1~0#1_BEFORE_CALL_14|))) (or (not (bvslt ((_ sign_extend 32) .cse0) c_~ARR_SIZE~0)) (not (bvsge .cse0 (_ bv0 32))) (let ((.cse1 ((_ sign_extend 32) (bvadd .cse2 .cse0)))) (and (not (= (bvadd .cse1 (_ bv2 64)) c_~ARR_SIZE~0)) (not (= .cse1 c_~ARR_SIZE~0)))) (let ((.cse4 (bvsge .cse2 (_ bv0 32))) (.cse3 (bvslt ((_ sign_extend 32) .cse2) c_~ARR_SIZE~0))) (and (or (not .cse3) (not .cse4) (not (= |c_assume_abort_if_not_#in~cond| (_ bv1 32)))) (or (and .cse4 .cse3) (not (= |c_assume_abort_if_not_#in~cond| (_ bv0 32))))))))) (exists ((|ULTIMATE.start_main_~index1~0#1| (_ BitVec 16))) (let ((.cse5 ((_ sign_extend 16) |ULTIMATE.start_main_~index1~0#1|))) (and (bvsge .cse5 (_ bv0 32)) (exists ((|ULTIMATE.start_main_~index2~0#1| (_ BitVec 16))) (let ((.cse6 ((_ sign_extend 16) |ULTIMATE.start_main_~index2~0#1|))) (and (bvsge .cse6 (_ bv0 32)) (bvslt ((_ sign_extend 32) .cse6) c_~ARR_SIZE~0) (let ((.cse7 ((_ sign_extend 32) (bvadd ((_ sign_extend 16) |ULTIMATE.start_main_~index1~0#1|) .cse6)))) (or (= (bvadd (_ bv2 64) .cse7) c_~ARR_SIZE~0) (= c_~ARR_SIZE~0 .cse7)))))) (bvslt ((_ sign_extend 32) .cse5) c_~ARR_SIZE~0))))) is different from true [2021-11-20 05:52:18,291 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 22 proven. 4 refuted. 0 times theorem prover too weak. 23 trivial. 2 not checked. [2021-11-20 05:52:18,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [681664577] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:52:18,291 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:52:18,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-11-20 05:52:18,291 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365491622] [2021-11-20 05:52:18,291 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 05:52:18,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-20 05:52:18,292 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 05:52:18,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-20 05:52:18,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=439, Unknown=2, NotChecked=44, Total=600 [2021-11-20 05:52:18,292 INFO L87 Difference]: Start difference. First operand 233 states and 272 transitions. Second operand has 22 states, 20 states have (on average 3.05) internal successors, (61), 18 states have internal predecessors, (61), 6 states have call successors, (8), 3 states have call predecessors, (8), 6 states have return successors, (10), 8 states have call predecessors, (10), 6 states have call successors, (10) [2021-11-20 05:52:25,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:52:25,556 INFO L93 Difference]: Finished difference Result 237 states and 275 transitions. [2021-11-20 05:52:25,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-20 05:52:25,558 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 3.05) internal successors, (61), 18 states have internal predecessors, (61), 6 states have call successors, (8), 3 states have call predecessors, (8), 6 states have return successors, (10), 8 states have call predecessors, (10), 6 states have call successors, (10) Word has length 54 [2021-11-20 05:52:25,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:52:25,560 INFO L225 Difference]: With dead ends: 237 [2021-11-20 05:52:25,560 INFO L226 Difference]: Without dead ends: 178 [2021-11-20 05:52:25,561 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 146 SyntacticMatches, 10 SemanticMatches, 26 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 18.9s TimeCoverageRelationStatistics Valid=147, Invalid=556, Unknown=3, NotChecked=50, Total=756 [2021-11-20 05:52:25,562 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 26 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 133 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 05:52:25,562 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 132 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 133 Unchecked, 0.2s Time] [2021-11-20 05:52:25,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-11-20 05:52:25,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 178. [2021-11-20 05:52:25,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 151 states have (on average 1.185430463576159) internal successors, (179), 155 states have internal predecessors, (179), 15 states have call successors, (15), 11 states have call predecessors, (15), 11 states have return successors, (15), 11 states have call predecessors, (15), 15 states have call successors, (15) [2021-11-20 05:52:25,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 209 transitions. [2021-11-20 05:52:25,602 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 209 transitions. Word has length 54 [2021-11-20 05:52:25,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:52:25,603 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 209 transitions. [2021-11-20 05:52:25,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 3.05) internal successors, (61), 18 states have internal predecessors, (61), 6 states have call successors, (8), 3 states have call predecessors, (8), 6 states have return successors, (10), 8 states have call predecessors, (10), 6 states have call successors, (10) [2021-11-20 05:52:25,603 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 209 transitions. [2021-11-20 05:52:25,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-20 05:52:25,604 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:52:25,605 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:52:25,609 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/cvc4 --incremental --print-success --lang smt (26)] Ended with exit code 0 [2021-11-20 05:52:25,819 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-20 05:52:26,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/cvc4 --incremental --print-success --lang smt,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 05:52:26,008 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:52:26,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:52:26,009 INFO L85 PathProgramCache]: Analyzing trace with hash 11450257, now seen corresponding path program 3 times [2021-11-20 05:52:26,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:52:26,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1806914866] [2021-11-20 05:52:26,010 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 05:52:26,010 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:52:26,010 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:52:26,011 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:52:26,013 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e215087-097f-4b94-8d80-55e67aacb017/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-20 05:52:26,571 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-11-20 05:52:26,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:52:26,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-20 05:52:26,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:52:27,103 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 21 treesize of output 17 [2021-11-20 05:52:27,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:52:27,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 33 [2021-11-20 05:52:28,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:52:28,943 INFO L354 Elim1Store]: treesize reduction 129, result has 20.9 percent of original size [2021-11-20 05:52:28,943 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 3 case distinctions, treesize of input 55 treesize of output 57 [2021-11-20 05:52:30,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:52:30,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:52:30,260 INFO L354 Elim1Store]: treesize reduction 106, result has 13.8 percent of original size [2021-11-20 05:52:30,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 5 case distinctions, treesize of input 52 treesize of output 57 [2021-11-20 05:52:38,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:53:01,292 WARN L227 SmtUtils]: Spent 22.32s on a formula simplification. DAG size of input: 76 DAG size of output: 47 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-20 05:53:01,293 INFO L354 Elim1Store]: treesize reduction 202, result has 45.0 percent of original size [2021-11-20 05:53:01,294 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 4 new quantified variables, introduced 10 case distinctions, treesize of input 120 treesize of output 244