./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/id_i25_o25-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e77c044 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f8a0c0f-2983-487a-8822-ee4daa7a511c/bin/uautomizer-WNIpwEf4Nt/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f8a0c0f-2983-487a-8822-ee4daa7a511c/bin/uautomizer-WNIpwEf4Nt/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f8a0c0f-2983-487a-8822-ee4daa7a511c/bin/uautomizer-WNIpwEf4Nt/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f8a0c0f-2983-487a-8822-ee4daa7a511c/bin/uautomizer-WNIpwEf4Nt/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/id_i25_o25-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f8a0c0f-2983-487a-8822-ee4daa7a511c/bin/uautomizer-WNIpwEf4Nt/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f8a0c0f-2983-487a-8822-ee4daa7a511c/bin/uautomizer-WNIpwEf4Nt --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 7214208e9cb45e87a457dfabd3017460791ae1b1 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 00:37:14,398 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 00:37:14,401 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 00:37:14,464 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 00:37:14,465 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 00:37:14,472 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 00:37:14,474 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 00:37:14,478 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 00:37:14,481 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 00:37:14,488 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 00:37:14,490 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 00:37:14,491 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 00:37:14,492 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 00:37:14,495 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 00:37:14,497 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 00:37:14,503 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 00:37:14,505 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 00:37:14,507 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 00:37:14,511 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 00:37:14,515 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 00:37:14,520 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 00:37:14,522 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 00:37:14,526 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 00:37:14,527 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 00:37:14,534 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 00:37:14,535 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 00:37:14,535 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 00:37:14,538 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 00:37:14,538 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 00:37:14,540 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 00:37:14,540 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 00:37:14,541 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 00:37:14,543 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 00:37:14,545 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 00:37:14,546 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 00:37:14,547 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 00:37:14,547 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 00:37:14,548 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 00:37:14,548 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 00:37:14,549 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 00:37:14,549 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 00:37:14,550 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f8a0c0f-2983-487a-8822-ee4daa7a511c/bin/uautomizer-WNIpwEf4Nt/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-13 00:37:14,594 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 00:37:14,594 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 00:37:14,595 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-13 00:37:14,595 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-13 00:37:14,597 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-13 00:37:14,597 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-13 00:37:14,597 INFO L138 SettingsManager]: * Use SBE=true [2021-10-13 00:37:14,598 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 00:37:14,598 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 00:37:14,598 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 00:37:14,599 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 00:37:14,600 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 00:37:14,600 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 00:37:14,600 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 00:37:14,600 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 00:37:14,600 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 00:37:14,601 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 00:37:14,601 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 00:37:14,601 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 00:37:14,602 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 00:37:14,602 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 00:37:14,602 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 00:37:14,602 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 00:37:14,603 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 00:37:14,603 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 00:37:14,603 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 00:37:14,603 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-13 00:37:14,604 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-13 00:37:14,604 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 00:37:14,606 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 00:37:14,606 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_8f8a0c0f-2983-487a-8822-ee4daa7a511c/bin/uautomizer-WNIpwEf4Nt/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f8a0c0f-2983-487a-8822-ee4daa7a511c/bin/uautomizer-WNIpwEf4Nt Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7214208e9cb45e87a457dfabd3017460791ae1b1 [2021-10-13 00:37:14,879 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 00:37:14,911 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 00:37:14,914 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 00:37:14,917 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 00:37:14,920 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 00:37:14,921 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f8a0c0f-2983-487a-8822-ee4daa7a511c/bin/uautomizer-WNIpwEf4Nt/../../sv-benchmarks/c/recursive-simple/id_i25_o25-1.c [2021-10-13 00:37:15,013 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f8a0c0f-2983-487a-8822-ee4daa7a511c/bin/uautomizer-WNIpwEf4Nt/data/147239aa1/2bea651fe60047c4a80104b772447e2d/FLAG046364906 [2021-10-13 00:37:15,419 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 00:37:15,420 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f8a0c0f-2983-487a-8822-ee4daa7a511c/sv-benchmarks/c/recursive-simple/id_i25_o25-1.c [2021-10-13 00:37:15,431 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f8a0c0f-2983-487a-8822-ee4daa7a511c/bin/uautomizer-WNIpwEf4Nt/data/147239aa1/2bea651fe60047c4a80104b772447e2d/FLAG046364906 [2021-10-13 00:37:15,811 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f8a0c0f-2983-487a-8822-ee4daa7a511c/bin/uautomizer-WNIpwEf4Nt/data/147239aa1/2bea651fe60047c4a80104b772447e2d [2021-10-13 00:37:15,814 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 00:37:15,816 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 00:37:15,818 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 00:37:15,819 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 00:37:15,833 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 00:37:15,834 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 12:37:15" (1/1) ... [2021-10-13 00:37:15,838 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@74b19dea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:37:15, skipping insertion in model container [2021-10-13 00:37:15,838 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 12:37:15" (1/1) ... [2021-10-13 00:37:15,847 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 00:37:15,865 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 00:37:16,108 WARN L228 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_8f8a0c0f-2983-487a-8822-ee4daa7a511c/sv-benchmarks/c/recursive-simple/id_i25_o25-1.c[454,467] [2021-10-13 00:37:16,112 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 00:37:16,121 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 00:37:16,135 WARN L228 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_8f8a0c0f-2983-487a-8822-ee4daa7a511c/sv-benchmarks/c/recursive-simple/id_i25_o25-1.c[454,467] [2021-10-13 00:37:16,136 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 00:37:16,147 INFO L208 MainTranslator]: Completed translation [2021-10-13 00:37:16,147 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:37:16 WrapperNode [2021-10-13 00:37:16,147 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 00:37:16,148 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 00:37:16,149 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 00:37:16,149 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 00:37:16,157 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:37:16" (1/1) ... [2021-10-13 00:37:16,164 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:37:16" (1/1) ... [2021-10-13 00:37:16,181 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 00:37:16,181 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 00:37:16,182 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 00:37:16,182 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 00:37:16,188 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:37:16" (1/1) ... [2021-10-13 00:37:16,189 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:37:16" (1/1) ... [2021-10-13 00:37:16,190 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:37:16" (1/1) ... [2021-10-13 00:37:16,190 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:37:16" (1/1) ... [2021-10-13 00:37:16,194 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:37:16" (1/1) ... [2021-10-13 00:37:16,195 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:37:16" (1/1) ... [2021-10-13 00:37:16,196 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:37:16" (1/1) ... [2021-10-13 00:37:16,198 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 00:37:16,199 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 00:37:16,199 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 00:37:16,199 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 00:37:16,200 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:37:16" (1/1) ... [2021-10-13 00:37:16,208 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 00:37:16,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f8a0c0f-2983-487a-8822-ee4daa7a511c/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:37:16,229 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f8a0c0f-2983-487a-8822-ee4daa7a511c/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 00:37:16,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f8a0c0f-2983-487a-8822-ee4daa7a511c/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 00:37:16,267 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 00:37:16,267 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 00:37:16,268 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-13 00:37:16,268 INFO L130 BoogieDeclarations]: Found specification of procedure id [2021-10-13 00:37:16,268 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2021-10-13 00:37:16,269 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 00:37:16,436 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 00:37:16,436 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-10-13 00:37:16,438 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 12:37:16 BoogieIcfgContainer [2021-10-13 00:37:16,438 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 00:37:16,440 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 00:37:16,440 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 00:37:16,445 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 00:37:16,445 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 12:37:15" (1/3) ... [2021-10-13 00:37:16,446 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74bcc080 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 12:37:16, skipping insertion in model container [2021-10-13 00:37:16,446 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:37:16" (2/3) ... [2021-10-13 00:37:16,446 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74bcc080 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 12:37:16, skipping insertion in model container [2021-10-13 00:37:16,447 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 12:37:16" (3/3) ... [2021-10-13 00:37:16,448 INFO L111 eAbstractionObserver]: Analyzing ICFG id_i25_o25-1.c [2021-10-13 00:37:16,453 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 00:37:16,453 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-13 00:37:16,498 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 00:37:16,503 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, mConcurrency=FINITE_AUTOMATA, 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 [2021-10-13 00:37:16,504 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-13 00:37:16,519 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-13 00:37:16,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-13 00:37:16,524 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:37:16,525 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:37:16,526 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:37:16,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:37:16,531 INFO L82 PathProgramCache]: Analyzing trace with hash -358017204, now seen corresponding path program 1 times [2021-10-13 00:37:16,541 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:37:16,541 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372125019] [2021-10-13 00:37:16,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:37:16,542 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:37:16,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:16,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:16,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:16,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:37:16,758 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:37:16,759 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372125019] [2021-10-13 00:37:16,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372125019] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:37:16,760 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:37:16,760 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-13 00:37:16,762 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701917998] [2021-10-13 00:37:16,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 00:37:16,767 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:37:16,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 00:37:16,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-13 00:37:16,784 INFO L87 Difference]: Start difference. First operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 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) [2021-10-13 00:37:16,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:37:16,838 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2021-10-13 00:37:16,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 00:37:16,840 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 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 10 [2021-10-13 00:37:16,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:37:16,848 INFO L225 Difference]: With dead ends: 25 [2021-10-13 00:37:16,848 INFO L226 Difference]: Without dead ends: 15 [2021-10-13 00:37:16,851 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.4ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-13 00:37:16,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-10-13 00:37:16,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-10-13 00:37:16,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.1) internal successors, (11), 11 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-10-13 00:37:16,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2021-10-13 00:37:16,936 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2021-10-13 00:37:16,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:37:16,937 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2021-10-13 00:37:16,937 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 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) [2021-10-13 00:37:16,937 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2021-10-13 00:37:16,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-13 00:37:16,940 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:37:16,941 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:37:16,941 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-13 00:37:16,941 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:37:16,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:37:16,944 INFO L82 PathProgramCache]: Analyzing trace with hash 679465686, now seen corresponding path program 1 times [2021-10-13 00:37:16,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:37:16,945 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101724848] [2021-10-13 00:37:16,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:37:16,945 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:37:17,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:17,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:17,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:17,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:17,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:17,108 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-13 00:37:17,109 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:37:17,109 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101724848] [2021-10-13 00:37:17,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101724848] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:37:17,110 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768596153] [2021-10-13 00:37:17,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:37:17,111 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:37:17,111 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f8a0c0f-2983-487a-8822-ee4daa7a511c/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:37:17,120 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f8a0c0f-2983-487a-8822-ee4daa7a511c/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:37:17,143 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f8a0c0f-2983-487a-8822-ee4daa7a511c/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-13 00:37:17,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:17,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 00:37:17,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:37:17,340 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-13 00:37:17,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768596153] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:37:17,341 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:37:17,341 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-10-13 00:37:17,342 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220335957] [2021-10-13 00:37:17,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 00:37:17,343 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:37:17,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 00:37:17,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-10-13 00:37:17,345 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 8 states have internal predecessors, (15), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-13 00:37:17,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:37:17,392 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2021-10-13 00:37:17,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 00:37:17,393 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 8 states have internal predecessors, (15), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 16 [2021-10-13 00:37:17,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:37:17,394 INFO L225 Difference]: With dead ends: 22 [2021-10-13 00:37:17,394 INFO L226 Difference]: Without dead ends: 18 [2021-10-13 00:37:17,395 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 54.9ms TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-10-13 00:37:17,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-10-13 00:37:17,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-10-13 00:37:17,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 13 states have internal predecessors, (13), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-10-13 00:37:17,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2021-10-13 00:37:17,400 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 16 [2021-10-13 00:37:17,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:37:17,401 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2021-10-13 00:37:17,401 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 8 states have internal predecessors, (15), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-13 00:37:17,402 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2021-10-13 00:37:17,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-13 00:37:17,403 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:37:17,403 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:37:17,440 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f8a0c0f-2983-487a-8822-ee4daa7a511c/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-13 00:37:17,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f8a0c0f-2983-487a-8822-ee4daa7a511c/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-10-13 00:37:17,631 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:37:17,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:37:17,632 INFO L82 PathProgramCache]: Analyzing trace with hash -41010676, now seen corresponding path program 2 times [2021-10-13 00:37:17,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:37:17,633 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535568798] [2021-10-13 00:37:17,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:37:17,633 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:37:17,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:17,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:17,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:17,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:17,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:17,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:17,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:17,863 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-13 00:37:17,863 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:37:17,864 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535568798] [2021-10-13 00:37:17,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535568798] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:37:17,864 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171246231] [2021-10-13 00:37:17,864 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 00:37:17,865 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:37:17,865 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f8a0c0f-2983-487a-8822-ee4daa7a511c/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:37:17,867 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f8a0c0f-2983-487a-8822-ee4daa7a511c/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:37:17,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f8a0c0f-2983-487a-8822-ee4daa7a511c/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-13 00:37:17,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 00:37:17,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:37:17,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 00:37:17,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:37:18,076 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-13 00:37:18,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171246231] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:37:18,077 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:37:18,077 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-10-13 00:37:18,077 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002952083] [2021-10-13 00:37:18,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-13 00:37:18,084 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:37:18,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-13 00:37:18,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-10-13 00:37:18,088 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 9 states, 8 states have (on average 2.125) internal successors, (17), 9 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 4 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-10-13 00:37:18,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:37:18,158 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2021-10-13 00:37:18,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-13 00:37:18,158 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 9 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 4 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 22 [2021-10-13 00:37:18,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:37:18,160 INFO L225 Difference]: With dead ends: 25 [2021-10-13 00:37:18,160 INFO L226 Difference]: Without dead ends: 21 [2021-10-13 00:37:18,161 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 59.2ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-10-13 00:37:18,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-10-13 00:37:18,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-10-13 00:37:18,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 15 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2021-10-13 00:37:18,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2021-10-13 00:37:18,176 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 22 [2021-10-13 00:37:18,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:37:18,177 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2021-10-13 00:37:18,177 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 9 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 4 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-10-13 00:37:18,177 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2021-10-13 00:37:18,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-13 00:37:18,180 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:37:18,180 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:37:18,206 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f8a0c0f-2983-487a-8822-ee4daa7a511c/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-10-13 00:37:18,398 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f8a0c0f-2983-487a-8822-ee4daa7a511c/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:37:18,398 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:37:18,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:37:18,399 INFO L82 PathProgramCache]: Analyzing trace with hash 1769866774, now seen corresponding path program 3 times [2021-10-13 00:37:18,399 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:37:18,399 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357545842] [2021-10-13 00:37:18,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:37:18,400 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:37:18,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:18,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:18,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:18,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:18,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:18,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:18,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:18,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:18,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:18,638 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-13 00:37:18,638 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:37:18,638 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357545842] [2021-10-13 00:37:18,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357545842] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:37:18,639 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535914150] [2021-10-13 00:37:18,639 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 00:37:18,639 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:37:18,639 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f8a0c0f-2983-487a-8822-ee4daa7a511c/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:37:18,651 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f8a0c0f-2983-487a-8822-ee4daa7a511c/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:37:18,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f8a0c0f-2983-487a-8822-ee4daa7a511c/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-13 00:37:18,780 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-13 00:37:18,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:37:18,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 00:37:18,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:37:18,927 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-13 00:37:18,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535914150] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:37:18,928 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:37:18,928 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-10-13 00:37:18,928 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890907360] [2021-10-13 00:37:18,930 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-13 00:37:18,930 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:37:18,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-13 00:37:18,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-10-13 00:37:18,932 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 10 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 5 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2021-10-13 00:37:19,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:37:19,001 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2021-10-13 00:37:19,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-13 00:37:19,002 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 10 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 5 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 28 [2021-10-13 00:37:19,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:37:19,005 INFO L225 Difference]: With dead ends: 28 [2021-10-13 00:37:19,005 INFO L226 Difference]: Without dead ends: 24 [2021-10-13 00:37:19,006 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 101.6ms TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-10-13 00:37:19,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-10-13 00:37:19,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-10-13 00:37:19,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 16 states have (on average 1.0625) internal successors, (17), 17 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 5 states have return successors, (6), 5 states have call predecessors, (6), 2 states have call successors, (6) [2021-10-13 00:37:19,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2021-10-13 00:37:19,016 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 28 [2021-10-13 00:37:19,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:37:19,017 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2021-10-13 00:37:19,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 10 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 5 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2021-10-13 00:37:19,018 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2021-10-13 00:37:19,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-13 00:37:19,021 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:37:19,022 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:37:19,059 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f8a0c0f-2983-487a-8822-ee4daa7a511c/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-13 00:37:19,242 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f8a0c0f-2983-487a-8822-ee4daa7a511c/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:37:19,243 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:37:19,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:37:19,243 INFO L82 PathProgramCache]: Analyzing trace with hash 371264716, now seen corresponding path program 4 times [2021-10-13 00:37:19,243 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:37:19,244 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659317113] [2021-10-13 00:37:19,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:37:19,244 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:37:19,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:19,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:19,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:19,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:19,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:19,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:19,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:19,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:19,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:19,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:19,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:19,403 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-10-13 00:37:19,406 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:37:19,406 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659317113] [2021-10-13 00:37:19,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659317113] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:37:19,407 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664262417] [2021-10-13 00:37:19,407 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 00:37:19,407 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:37:19,407 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f8a0c0f-2983-487a-8822-ee4daa7a511c/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:37:19,411 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f8a0c0f-2983-487a-8822-ee4daa7a511c/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:37:19,443 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f8a0c0f-2983-487a-8822-ee4daa7a511c/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-13 00:37:19,506 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 00:37:19,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:37:19,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-13 00:37:19,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:37:19,667 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-10-13 00:37:19,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664262417] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:37:19,667 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:37:19,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-10-13 00:37:19,667 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544895046] [2021-10-13 00:37:19,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-13 00:37:19,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:37:19,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-13 00:37:19,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-10-13 00:37:19,669 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 11 states, 10 states have (on average 2.1) internal successors, (21), 11 states have internal predecessors, (21), 3 states have call successors, (3), 1 states have call predecessors, (3), 6 states have return successors, (9), 5 states have call predecessors, (9), 3 states have call successors, (9) [2021-10-13 00:37:19,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:37:19,742 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2021-10-13 00:37:19,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-13 00:37:19,743 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.1) internal successors, (21), 11 states have internal predecessors, (21), 3 states have call successors, (3), 1 states have call predecessors, (3), 6 states have return successors, (9), 5 states have call predecessors, (9), 3 states have call successors, (9) Word has length 34 [2021-10-13 00:37:19,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:37:19,745 INFO L225 Difference]: With dead ends: 31 [2021-10-13 00:37:19,745 INFO L226 Difference]: Without dead ends: 27 [2021-10-13 00:37:19,746 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 88.5ms TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2021-10-13 00:37:19,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-10-13 00:37:19,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-10-13 00:37:19,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.0555555555555556) internal successors, (19), 19 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 6 states have return successors, (7), 6 states have call predecessors, (7), 2 states have call successors, (7) [2021-10-13 00:37:19,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2021-10-13 00:37:19,751 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 34 [2021-10-13 00:37:19,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:37:19,751 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2021-10-13 00:37:19,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.1) internal successors, (21), 11 states have internal predecessors, (21), 3 states have call successors, (3), 1 states have call predecessors, (3), 6 states have return successors, (9), 5 states have call predecessors, (9), 3 states have call successors, (9) [2021-10-13 00:37:19,751 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2021-10-13 00:37:19,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-10-13 00:37:19,752 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:37:19,752 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:37:19,778 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f8a0c0f-2983-487a-8822-ee4daa7a511c/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-10-13 00:37:19,952 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f8a0c0f-2983-487a-8822-ee4daa7a511c/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:37:19,953 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:37:19,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:37:19,953 INFO L82 PathProgramCache]: Analyzing trace with hash -886339242, now seen corresponding path program 5 times [2021-10-13 00:37:19,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:37:19,953 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504562080] [2021-10-13 00:37:19,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:37:19,954 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:37:19,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:20,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:20,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:20,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:20,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:20,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:20,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:20,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:20,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:20,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:20,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:20,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:20,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:20,191 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-10-13 00:37:20,191 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:37:20,191 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504562080] [2021-10-13 00:37:20,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504562080] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:37:20,192 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736755054] [2021-10-13 00:37:20,192 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 00:37:20,192 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:37:20,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f8a0c0f-2983-487a-8822-ee4daa7a511c/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:37:20,193 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f8a0c0f-2983-487a-8822-ee4daa7a511c/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:37:20,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f8a0c0f-2983-487a-8822-ee4daa7a511c/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-13 00:37:20,285 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-10-13 00:37:20,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:37:20,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-13 00:37:20,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:37:20,438 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-10-13 00:37:20,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736755054] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:37:20,439 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:37:20,439 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-10-13 00:37:20,439 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637869080] [2021-10-13 00:37:20,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-13 00:37:20,440 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:37:20,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-13 00:37:20,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-10-13 00:37:20,441 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 12 states have internal predecessors, (23), 3 states have call successors, (3), 1 states have call predecessors, (3), 7 states have return successors, (11), 6 states have call predecessors, (11), 3 states have call successors, (11) [2021-10-13 00:37:20,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:37:20,506 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2021-10-13 00:37:20,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-13 00:37:20,506 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 12 states have internal predecessors, (23), 3 states have call successors, (3), 1 states have call predecessors, (3), 7 states have return successors, (11), 6 states have call predecessors, (11), 3 states have call successors, (11) Word has length 40 [2021-10-13 00:37:20,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:37:20,508 INFO L225 Difference]: With dead ends: 34 [2021-10-13 00:37:20,508 INFO L226 Difference]: Without dead ends: 30 [2021-10-13 00:37:20,508 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 85.3ms TimeCoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2021-10-13 00:37:20,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-10-13 00:37:20,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-10-13 00:37:20,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 20 states have (on average 1.05) internal successors, (21), 21 states have internal predecessors, (21), 2 states have call successors, (2), 1 states have call predecessors, (2), 7 states have return successors, (8), 7 states have call predecessors, (8), 2 states have call successors, (8) [2021-10-13 00:37:20,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2021-10-13 00:37:20,514 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 40 [2021-10-13 00:37:20,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:37:20,514 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2021-10-13 00:37:20,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 12 states have internal predecessors, (23), 3 states have call successors, (3), 1 states have call predecessors, (3), 7 states have return successors, (11), 6 states have call predecessors, (11), 3 states have call successors, (11) [2021-10-13 00:37:20,514 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2021-10-13 00:37:20,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-10-13 00:37:20,516 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:37:20,516 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:37:20,551 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f8a0c0f-2983-487a-8822-ee4daa7a511c/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-13 00:37:20,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f8a0c0f-2983-487a-8822-ee4daa7a511c/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:37:20,732 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:37:20,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:37:20,732 INFO L82 PathProgramCache]: Analyzing trace with hash -918712436, now seen corresponding path program 6 times [2021-10-13 00:37:20,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:37:20,733 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801428828] [2021-10-13 00:37:20,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:37:20,733 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:37:20,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:20,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:20,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:20,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:20,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:20,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:20,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:20,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:20,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:20,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:20,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:20,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:20,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:20,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:20,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:20,943 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-10-13 00:37:20,944 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:37:20,944 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801428828] [2021-10-13 00:37:20,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801428828] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:37:20,944 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822764847] [2021-10-13 00:37:20,944 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 00:37:20,944 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:37:20,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f8a0c0f-2983-487a-8822-ee4daa7a511c/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:37:20,945 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f8a0c0f-2983-487a-8822-ee4daa7a511c/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:37:20,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f8a0c0f-2983-487a-8822-ee4daa7a511c/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-13 00:37:21,051 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-10-13 00:37:21,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:37:21,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-13 00:37:21,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:37:21,251 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-10-13 00:37:21,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [822764847] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:37:21,251 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:37:21,251 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-10-13 00:37:21,251 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898074763] [2021-10-13 00:37:21,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-13 00:37:21,252 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:37:21,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-13 00:37:21,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-10-13 00:37:21,253 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 13 states have internal predecessors, (25), 3 states have call successors, (3), 1 states have call predecessors, (3), 8 states have return successors, (13), 7 states have call predecessors, (13), 3 states have call successors, (13) [2021-10-13 00:37:21,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:37:21,329 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2021-10-13 00:37:21,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-13 00:37:21,330 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 13 states have internal predecessors, (25), 3 states have call successors, (3), 1 states have call predecessors, (3), 8 states have return successors, (13), 7 states have call predecessors, (13), 3 states have call successors, (13) Word has length 46 [2021-10-13 00:37:21,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:37:21,331 INFO L225 Difference]: With dead ends: 37 [2021-10-13 00:37:21,331 INFO L226 Difference]: Without dead ends: 33 [2021-10-13 00:37:21,332 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 95.9ms TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2021-10-13 00:37:21,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-10-13 00:37:21,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-10-13 00:37:21,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.0454545454545454) internal successors, (23), 23 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 8 states have return successors, (9), 8 states have call predecessors, (9), 2 states have call successors, (9) [2021-10-13 00:37:21,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2021-10-13 00:37:21,337 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 46 [2021-10-13 00:37:21,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:37:21,337 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2021-10-13 00:37:21,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 13 states have internal predecessors, (25), 3 states have call successors, (3), 1 states have call predecessors, (3), 8 states have return successors, (13), 7 states have call predecessors, (13), 3 states have call successors, (13) [2021-10-13 00:37:21,338 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2021-10-13 00:37:21,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-10-13 00:37:21,339 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:37:21,339 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:37:21,366 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f8a0c0f-2983-487a-8822-ee4daa7a511c/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-13 00:37:21,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f8a0c0f-2983-487a-8822-ee4daa7a511c/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:37:21,551 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:37:21,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:37:21,552 INFO L82 PathProgramCache]: Analyzing trace with hash -626238314, now seen corresponding path program 7 times [2021-10-13 00:37:21,552 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:37:21,552 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284923971] [2021-10-13 00:37:21,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:37:21,552 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:37:21,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:21,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:21,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:21,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:21,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:21,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:21,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:21,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:21,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:21,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:21,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:21,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:21,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:21,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:21,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:21,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:21,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:21,765 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-10-13 00:37:21,767 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:37:21,767 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284923971] [2021-10-13 00:37:21,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284923971] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:37:21,768 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382637788] [2021-10-13 00:37:21,768 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-13 00:37:21,768 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:37:21,769 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f8a0c0f-2983-487a-8822-ee4daa7a511c/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:37:21,771 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f8a0c0f-2983-487a-8822-ee4daa7a511c/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:37:21,795 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f8a0c0f-2983-487a-8822-ee4daa7a511c/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-13 00:37:21,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:21,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-13 00:37:21,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:37:22,094 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-10-13 00:37:22,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382637788] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:37:22,096 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:37:22,096 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-10-13 00:37:22,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650562132] [2021-10-13 00:37:22,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-13 00:37:22,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:37:22,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-13 00:37:22,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-10-13 00:37:22,099 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 14 states have internal predecessors, (27), 3 states have call successors, (3), 1 states have call predecessors, (3), 9 states have return successors, (15), 8 states have call predecessors, (15), 3 states have call successors, (15) [2021-10-13 00:37:22,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:37:22,206 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2021-10-13 00:37:22,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-13 00:37:22,206 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 14 states have internal predecessors, (27), 3 states have call successors, (3), 1 states have call predecessors, (3), 9 states have return successors, (15), 8 states have call predecessors, (15), 3 states have call successors, (15) Word has length 52 [2021-10-13 00:37:22,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:37:22,210 INFO L225 Difference]: With dead ends: 40 [2021-10-13 00:37:22,210 INFO L226 Difference]: Without dead ends: 36 [2021-10-13 00:37:22,211 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 122.8ms TimeCoverageRelationStatistics Valid=159, Invalid=303, Unknown=0, NotChecked=0, Total=462 [2021-10-13 00:37:22,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-10-13 00:37:22,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-10-13 00:37:22,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 24 states have (on average 1.0416666666666667) internal successors, (25), 25 states have internal predecessors, (25), 2 states have call successors, (2), 1 states have call predecessors, (2), 9 states have return successors, (10), 9 states have call predecessors, (10), 2 states have call successors, (10) [2021-10-13 00:37:22,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2021-10-13 00:37:22,222 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 52 [2021-10-13 00:37:22,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:37:22,223 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2021-10-13 00:37:22,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 14 states have internal predecessors, (27), 3 states have call successors, (3), 1 states have call predecessors, (3), 9 states have return successors, (15), 8 states have call predecessors, (15), 3 states have call successors, (15) [2021-10-13 00:37:22,223 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2021-10-13 00:37:22,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-10-13 00:37:22,227 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:37:22,230 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:37:22,269 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f8a0c0f-2983-487a-8822-ee4daa7a511c/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-13 00:37:22,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f8a0c0f-2983-487a-8822-ee4daa7a511c/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-10-13 00:37:22,451 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:37:22,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:37:22,452 INFO L82 PathProgramCache]: Analyzing trace with hash -960511412, now seen corresponding path program 8 times [2021-10-13 00:37:22,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:37:22,452 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564565711] [2021-10-13 00:37:22,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:37:22,452 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:37:22,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:22,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:22,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:22,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:22,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:22,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:22,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:22,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:22,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:22,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:22,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:22,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:22,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:22,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:22,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:22,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:22,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:22,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:22,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:22,699 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-10-13 00:37:22,699 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:37:22,699 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564565711] [2021-10-13 00:37:22,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564565711] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:37:22,700 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870755563] [2021-10-13 00:37:22,700 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 00:37:22,700 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:37:22,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f8a0c0f-2983-487a-8822-ee4daa7a511c/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:37:22,701 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f8a0c0f-2983-487a-8822-ee4daa7a511c/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:37:22,721 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f8a0c0f-2983-487a-8822-ee4daa7a511c/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-13 00:37:22,839 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 00:37:22,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:37:22,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-13 00:37:22,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:37:23,112 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-10-13 00:37:23,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [870755563] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:37:23,114 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:37:23,114 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-10-13 00:37:23,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926180682] [2021-10-13 00:37:23,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-13 00:37:23,119 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:37:23,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-13 00:37:23,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-10-13 00:37:23,120 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 15 states have internal predecessors, (29), 3 states have call successors, (3), 1 states have call predecessors, (3), 10 states have return successors, (17), 9 states have call predecessors, (17), 3 states have call successors, (17) [2021-10-13 00:37:23,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:37:23,219 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2021-10-13 00:37:23,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-13 00:37:23,219 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 15 states have internal predecessors, (29), 3 states have call successors, (3), 1 states have call predecessors, (3), 10 states have return successors, (17), 9 states have call predecessors, (17), 3 states have call successors, (17) Word has length 58 [2021-10-13 00:37:23,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:37:23,221 INFO L225 Difference]: With dead ends: 43 [2021-10-13 00:37:23,221 INFO L226 Difference]: Without dead ends: 39 [2021-10-13 00:37:23,221 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 139.1ms TimeCoverageRelationStatistics Valid=191, Invalid=361, Unknown=0, NotChecked=0, Total=552 [2021-10-13 00:37:23,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-10-13 00:37:23,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-10-13 00:37:23,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 27 states have internal predecessors, (27), 2 states have call successors, (2), 1 states have call predecessors, (2), 10 states have return successors, (11), 10 states have call predecessors, (11), 2 states have call successors, (11) [2021-10-13 00:37:23,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2021-10-13 00:37:23,227 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 58 [2021-10-13 00:37:23,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:37:23,227 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2021-10-13 00:37:23,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 15 states have internal predecessors, (29), 3 states have call successors, (3), 1 states have call predecessors, (3), 10 states have return successors, (17), 9 states have call predecessors, (17), 3 states have call successors, (17) [2021-10-13 00:37:23,228 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2021-10-13 00:37:23,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-10-13 00:37:23,229 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:37:23,229 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:37:23,259 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f8a0c0f-2983-487a-8822-ee4daa7a511c/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-13 00:37:23,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f8a0c0f-2983-487a-8822-ee4daa7a511c/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:37:23,447 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:37:23,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:37:23,448 INFO L82 PathProgramCache]: Analyzing trace with hash -366706730, now seen corresponding path program 9 times [2021-10-13 00:37:23,448 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:37:23,448 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366763910] [2021-10-13 00:37:23,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:37:23,448 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:37:23,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:23,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:23,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:23,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:23,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:23,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:23,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:23,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:23,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:23,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:23,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:23,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:23,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:23,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:23,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:23,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:23,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:23,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:23,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:23,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:23,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:23,749 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-10-13 00:37:23,749 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:37:23,750 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366763910] [2021-10-13 00:37:23,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366763910] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:37:23,750 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410856058] [2021-10-13 00:37:23,750 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 00:37:23,750 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:37:23,750 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f8a0c0f-2983-487a-8822-ee4daa7a511c/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:37:23,751 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f8a0c0f-2983-487a-8822-ee4daa7a511c/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:37:23,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f8a0c0f-2983-487a-8822-ee4daa7a511c/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-13 00:37:23,925 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-10-13 00:37:23,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:37:23,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-13 00:37:23,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:37:24,124 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-10-13 00:37:24,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [410856058] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:37:24,124 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:37:24,124 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2021-10-13 00:37:24,125 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42583324] [2021-10-13 00:37:24,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-13 00:37:24,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:37:24,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-13 00:37:24,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-10-13 00:37:24,126 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand has 16 states, 15 states have (on average 2.066666666666667) internal successors, (31), 16 states have internal predecessors, (31), 3 states have call successors, (3), 1 states have call predecessors, (3), 11 states have return successors, (19), 10 states have call predecessors, (19), 3 states have call successors, (19) [2021-10-13 00:37:24,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:37:24,231 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2021-10-13 00:37:24,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-13 00:37:24,231 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.066666666666667) internal successors, (31), 16 states have internal predecessors, (31), 3 states have call successors, (3), 1 states have call predecessors, (3), 11 states have return successors, (19), 10 states have call predecessors, (19), 3 states have call successors, (19) Word has length 64 [2021-10-13 00:37:24,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:37:24,236 INFO L225 Difference]: With dead ends: 46 [2021-10-13 00:37:24,236 INFO L226 Difference]: Without dead ends: 42 [2021-10-13 00:37:24,237 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 140.7ms TimeCoverageRelationStatistics Valid=226, Invalid=424, Unknown=0, NotChecked=0, Total=650 [2021-10-13 00:37:24,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-10-13 00:37:24,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-10-13 00:37:24,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 28 states have (on average 1.0357142857142858) internal successors, (29), 29 states have internal predecessors, (29), 2 states have call successors, (2), 1 states have call predecessors, (2), 11 states have return successors, (12), 11 states have call predecessors, (12), 2 states have call successors, (12) [2021-10-13 00:37:24,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2021-10-13 00:37:24,253 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 64 [2021-10-13 00:37:24,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:37:24,254 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2021-10-13 00:37:24,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.066666666666667) internal successors, (31), 16 states have internal predecessors, (31), 3 states have call successors, (3), 1 states have call predecessors, (3), 11 states have return successors, (19), 10 states have call predecessors, (19), 3 states have call successors, (19) [2021-10-13 00:37:24,254 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2021-10-13 00:37:24,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-10-13 00:37:24,256 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:37:24,257 INFO L512 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:37:24,293 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f8a0c0f-2983-487a-8822-ee4daa7a511c/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-13 00:37:24,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f8a0c0f-2983-487a-8822-ee4daa7a511c/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-10-13 00:37:24,476 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:37:24,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:37:24,476 INFO L82 PathProgramCache]: Analyzing trace with hash -1719425780, now seen corresponding path program 10 times [2021-10-13 00:37:24,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:37:24,476 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978367162] [2021-10-13 00:37:24,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:37:24,477 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:37:24,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:24,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:24,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:24,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:24,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:24,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:24,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:24,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:24,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:24,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:24,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:24,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:24,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:24,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:24,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:24,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:24,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:24,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:24,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:24,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:24,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:24,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:24,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:24,775 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2021-10-13 00:37:24,775 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:37:24,775 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978367162] [2021-10-13 00:37:24,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978367162] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:37:24,776 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062963212] [2021-10-13 00:37:24,776 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 00:37:24,776 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:37:24,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f8a0c0f-2983-487a-8822-ee4daa7a511c/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:37:24,779 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f8a0c0f-2983-487a-8822-ee4daa7a511c/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:37:24,798 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f8a0c0f-2983-487a-8822-ee4daa7a511c/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-13 00:37:24,967 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 00:37:24,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:37:24,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-13 00:37:24,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:37:25,203 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2021-10-13 00:37:25,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062963212] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:37:25,203 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:37:25,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-10-13 00:37:25,204 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309830593] [2021-10-13 00:37:25,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-13 00:37:25,204 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:37:25,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-13 00:37:25,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2021-10-13 00:37:25,205 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand has 17 states, 16 states have (on average 2.0625) internal successors, (33), 17 states have internal predecessors, (33), 3 states have call successors, (3), 1 states have call predecessors, (3), 12 states have return successors, (21), 11 states have call predecessors, (21), 3 states have call successors, (21) [2021-10-13 00:37:25,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:37:25,338 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2021-10-13 00:37:25,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-13 00:37:25,338 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.0625) internal successors, (33), 17 states have internal predecessors, (33), 3 states have call successors, (3), 1 states have call predecessors, (3), 12 states have return successors, (21), 11 states have call predecessors, (21), 3 states have call successors, (21) Word has length 70 [2021-10-13 00:37:25,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:37:25,340 INFO L225 Difference]: With dead ends: 49 [2021-10-13 00:37:25,340 INFO L226 Difference]: Without dead ends: 45 [2021-10-13 00:37:25,344 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 178.6ms TimeCoverageRelationStatistics Valid=264, Invalid=492, Unknown=0, NotChecked=0, Total=756 [2021-10-13 00:37:25,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-10-13 00:37:25,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-10-13 00:37:25,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 30 states have (on average 1.0333333333333334) internal successors, (31), 31 states have internal predecessors, (31), 2 states have call successors, (2), 1 states have call predecessors, (2), 12 states have return successors, (13), 12 states have call predecessors, (13), 2 states have call successors, (13) [2021-10-13 00:37:25,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2021-10-13 00:37:25,359 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 70 [2021-10-13 00:37:25,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:37:25,360 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2021-10-13 00:37:25,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.0625) internal successors, (33), 17 states have internal predecessors, (33), 3 states have call successors, (3), 1 states have call predecessors, (3), 12 states have return successors, (21), 11 states have call predecessors, (21), 3 states have call successors, (21) [2021-10-13 00:37:25,360 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2021-10-13 00:37:25,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-10-13 00:37:25,364 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:37:25,364 INFO L512 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:37:25,402 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f8a0c0f-2983-487a-8822-ee4daa7a511c/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-13 00:37:25,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f8a0c0f-2983-487a-8822-ee4daa7a511c/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-10-13 00:37:25,583 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:37:25,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:37:25,584 INFO L82 PathProgramCache]: Analyzing trace with hash 1354232598, now seen corresponding path program 11 times [2021-10-13 00:37:25,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:37:25,584 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259283949] [2021-10-13 00:37:25,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:37:25,584 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:37:25,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:25,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:25,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:25,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:25,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:25,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:25,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:25,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:25,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:25,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:25,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:25,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:25,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:25,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:25,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:25,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:25,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:25,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:25,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:25,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:25,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:25,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:25,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:25,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:25,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:25,921 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2021-10-13 00:37:25,922 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:37:25,922 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259283949] [2021-10-13 00:37:25,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259283949] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:37:25,922 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096526798] [2021-10-13 00:37:25,922 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 00:37:25,922 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:37:25,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f8a0c0f-2983-487a-8822-ee4daa7a511c/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:37:25,927 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f8a0c0f-2983-487a-8822-ee4daa7a511c/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:37:25,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f8a0c0f-2983-487a-8822-ee4daa7a511c/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-13 00:37:26,144 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-10-13 00:37:26,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:37:26,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 26 conjunts are in the unsatisfiable core [2021-10-13 00:37:26,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:37:26,396 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2021-10-13 00:37:26,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096526798] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:37:26,396 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:37:26,396 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-10-13 00:37:26,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958815582] [2021-10-13 00:37:26,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-13 00:37:26,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:37:26,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-13 00:37:26,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2021-10-13 00:37:26,399 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand has 18 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 18 states have internal predecessors, (35), 3 states have call successors, (3), 1 states have call predecessors, (3), 13 states have return successors, (23), 12 states have call predecessors, (23), 3 states have call successors, (23) [2021-10-13 00:37:26,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:37:26,544 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2021-10-13 00:37:26,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-13 00:37:26,545 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 18 states have internal predecessors, (35), 3 states have call successors, (3), 1 states have call predecessors, (3), 13 states have return successors, (23), 12 states have call predecessors, (23), 3 states have call successors, (23) Word has length 76 [2021-10-13 00:37:26,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:37:26,546 INFO L225 Difference]: With dead ends: 52 [2021-10-13 00:37:26,546 INFO L226 Difference]: Without dead ends: 48 [2021-10-13 00:37:26,550 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 196.2ms TimeCoverageRelationStatistics Valid=305, Invalid=565, Unknown=0, NotChecked=0, Total=870 [2021-10-13 00:37:26,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-10-13 00:37:26,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2021-10-13 00:37:26,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 32 states have (on average 1.03125) internal successors, (33), 33 states have internal predecessors, (33), 2 states have call successors, (2), 1 states have call predecessors, (2), 13 states have return successors, (14), 13 states have call predecessors, (14), 2 states have call successors, (14) [2021-10-13 00:37:26,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2021-10-13 00:37:26,562 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 76 [2021-10-13 00:37:26,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:37:26,562 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2021-10-13 00:37:26,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 18 states have internal predecessors, (35), 3 states have call successors, (3), 1 states have call predecessors, (3), 13 states have return successors, (23), 12 states have call predecessors, (23), 3 states have call successors, (23) [2021-10-13 00:37:26,563 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2021-10-13 00:37:26,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-10-13 00:37:26,564 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:37:26,564 INFO L512 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:37:26,599 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f8a0c0f-2983-487a-8822-ee4daa7a511c/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-13 00:37:26,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f8a0c0f-2983-487a-8822-ee4daa7a511c/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:37:26,791 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:37:26,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:37:26,792 INFO L82 PathProgramCache]: Analyzing trace with hash 1734686668, now seen corresponding path program 12 times [2021-10-13 00:37:26,792 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:37:26,792 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28014682] [2021-10-13 00:37:26,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:37:26,792 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:37:26,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:26,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:26,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:26,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:26,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:26,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:26,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:26,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:26,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:26,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:26,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:27,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:27,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:27,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:27,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:27,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:27,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:27,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:27,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:27,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:27,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:27,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:27,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:27,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:27,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:27,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:27,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:27,205 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2021-10-13 00:37:27,205 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:37:27,206 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28014682] [2021-10-13 00:37:27,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28014682] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:37:27,206 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003950695] [2021-10-13 00:37:27,206 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 00:37:27,206 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:37:27,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f8a0c0f-2983-487a-8822-ee4daa7a511c/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:37:27,211 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f8a0c0f-2983-487a-8822-ee4daa7a511c/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:37:27,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f8a0c0f-2983-487a-8822-ee4daa7a511c/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-13 00:37:27,475 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-10-13 00:37:27,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:37:27,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 28 conjunts are in the unsatisfiable core [2021-10-13 00:37:27,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:37:27,760 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2021-10-13 00:37:27,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003950695] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:37:27,761 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:37:27,761 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-10-13 00:37:27,762 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050146814] [2021-10-13 00:37:27,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-13 00:37:27,762 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:37:27,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-13 00:37:27,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=215, Unknown=0, NotChecked=0, Total=342 [2021-10-13 00:37:27,764 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand has 19 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 19 states have internal predecessors, (37), 3 states have call successors, (3), 1 states have call predecessors, (3), 14 states have return successors, (25), 13 states have call predecessors, (25), 3 states have call successors, (25) [2021-10-13 00:37:27,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:37:27,917 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2021-10-13 00:37:27,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-13 00:37:27,918 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 19 states have internal predecessors, (37), 3 states have call successors, (3), 1 states have call predecessors, (3), 14 states have return successors, (25), 13 states have call predecessors, (25), 3 states have call successors, (25) Word has length 82 [2021-10-13 00:37:27,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:37:27,919 INFO L225 Difference]: With dead ends: 55 [2021-10-13 00:37:27,919 INFO L226 Difference]: Without dead ends: 51 [2021-10-13 00:37:27,920 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 221.0ms TimeCoverageRelationStatistics Valid=349, Invalid=643, Unknown=0, NotChecked=0, Total=992 [2021-10-13 00:37:27,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-10-13 00:37:27,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2021-10-13 00:37:27,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 34 states have (on average 1.0294117647058822) internal successors, (35), 35 states have internal predecessors, (35), 2 states have call successors, (2), 1 states have call predecessors, (2), 14 states have return successors, (15), 14 states have call predecessors, (15), 2 states have call successors, (15) [2021-10-13 00:37:27,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2021-10-13 00:37:27,924 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 82 [2021-10-13 00:37:27,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:37:27,924 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2021-10-13 00:37:27,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 19 states have internal predecessors, (37), 3 states have call successors, (3), 1 states have call predecessors, (3), 14 states have return successors, (25), 13 states have call predecessors, (25), 3 states have call successors, (25) [2021-10-13 00:37:27,924 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2021-10-13 00:37:27,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-10-13 00:37:27,925 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:37:27,925 INFO L512 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:37:27,966 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f8a0c0f-2983-487a-8822-ee4daa7a511c/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-10-13 00:37:28,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f8a0c0f-2983-487a-8822-ee4daa7a511c/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:37:28,147 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:37:28,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:37:28,148 INFO L82 PathProgramCache]: Analyzing trace with hash -1433749930, now seen corresponding path program 13 times [2021-10-13 00:37:28,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:37:28,148 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41769174] [2021-10-13 00:37:28,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:37:28,148 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:37:28,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:28,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:28,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:28,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:28,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:28,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:28,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:28,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:28,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:28,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:28,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:28,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:28,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:28,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:28,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:28,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:28,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:28,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:28,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:28,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:28,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:28,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:28,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:28,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:28,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:28,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:28,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:28,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:28,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:28,565 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2021-10-13 00:37:28,565 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:37:28,566 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41769174] [2021-10-13 00:37:28,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41769174] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:37:28,566 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37754583] [2021-10-13 00:37:28,566 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-13 00:37:28,566 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:37:28,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f8a0c0f-2983-487a-8822-ee4daa7a511c/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:37:28,571 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f8a0c0f-2983-487a-8822-ee4daa7a511c/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:37:28,587 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f8a0c0f-2983-487a-8822-ee4daa7a511c/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-13 00:37:28,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:28,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 30 conjunts are in the unsatisfiable core [2021-10-13 00:37:28,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:37:29,117 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2021-10-13 00:37:29,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37754583] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:37:29,118 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:37:29,118 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2021-10-13 00:37:29,118 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704501007] [2021-10-13 00:37:29,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-13 00:37:29,119 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:37:29,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-13 00:37:29,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=237, Unknown=0, NotChecked=0, Total=380 [2021-10-13 00:37:29,120 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand has 20 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 20 states have internal predecessors, (39), 3 states have call successors, (3), 1 states have call predecessors, (3), 15 states have return successors, (27), 14 states have call predecessors, (27), 3 states have call successors, (27) [2021-10-13 00:37:29,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:37:29,291 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2021-10-13 00:37:29,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-13 00:37:29,291 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 20 states have internal predecessors, (39), 3 states have call successors, (3), 1 states have call predecessors, (3), 15 states have return successors, (27), 14 states have call predecessors, (27), 3 states have call successors, (27) Word has length 88 [2021-10-13 00:37:29,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:37:29,292 INFO L225 Difference]: With dead ends: 58 [2021-10-13 00:37:29,292 INFO L226 Difference]: Without dead ends: 54 [2021-10-13 00:37:29,293 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 245.7ms TimeCoverageRelationStatistics Valid=396, Invalid=726, Unknown=0, NotChecked=0, Total=1122 [2021-10-13 00:37:29,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-10-13 00:37:29,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2021-10-13 00:37:29,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 36 states have (on average 1.0277777777777777) internal successors, (37), 37 states have internal predecessors, (37), 2 states have call successors, (2), 1 states have call predecessors, (2), 15 states have return successors, (16), 15 states have call predecessors, (16), 2 states have call successors, (16) [2021-10-13 00:37:29,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2021-10-13 00:37:29,298 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 88 [2021-10-13 00:37:29,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:37:29,298 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2021-10-13 00:37:29,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 20 states have internal predecessors, (39), 3 states have call successors, (3), 1 states have call predecessors, (3), 15 states have return successors, (27), 14 states have call predecessors, (27), 3 states have call successors, (27) [2021-10-13 00:37:29,299 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2021-10-13 00:37:29,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-10-13 00:37:29,300 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:37:29,300 INFO L512 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:37:29,327 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f8a0c0f-2983-487a-8822-ee4daa7a511c/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-10-13 00:37:29,516 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f8a0c0f-2983-487a-8822-ee4daa7a511c/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:37:29,516 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:37:29,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:37:29,517 INFO L82 PathProgramCache]: Analyzing trace with hash -1321174388, now seen corresponding path program 14 times [2021-10-13 00:37:29,517 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:37:29,517 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586623530] [2021-10-13 00:37:29,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:37:29,517 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:37:29,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:29,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:29,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:29,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:29,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:29,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:29,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:29,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:29,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:29,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:29,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:29,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:29,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:29,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:29,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:29,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:29,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:29,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:29,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:29,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:29,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:29,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:29,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:29,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:29,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:29,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:29,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:29,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:29,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:29,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:29,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:29,924 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2021-10-13 00:37:29,924 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:37:29,925 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586623530] [2021-10-13 00:37:29,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586623530] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:37:29,925 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395233675] [2021-10-13 00:37:29,925 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 00:37:29,925 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:37:29,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f8a0c0f-2983-487a-8822-ee4daa7a511c/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:37:29,951 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f8a0c0f-2983-487a-8822-ee4daa7a511c/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:37:29,973 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f8a0c0f-2983-487a-8822-ee4daa7a511c/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-10-13 00:37:30,251 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 00:37:30,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:37:30,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 32 conjunts are in the unsatisfiable core [2021-10-13 00:37:30,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:37:30,591 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2021-10-13 00:37:30,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395233675] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:37:30,592 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:37:30,592 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-10-13 00:37:30,592 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644987528] [2021-10-13 00:37:30,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-13 00:37:30,593 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:37:30,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-13 00:37:30,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=260, Unknown=0, NotChecked=0, Total=420 [2021-10-13 00:37:30,594 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand has 21 states, 20 states have (on average 2.05) internal successors, (41), 21 states have internal predecessors, (41), 3 states have call successors, (3), 1 states have call predecessors, (3), 16 states have return successors, (29), 15 states have call predecessors, (29), 3 states have call successors, (29) [2021-10-13 00:37:30,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:37:30,773 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2021-10-13 00:37:30,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-13 00:37:30,773 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.05) internal successors, (41), 21 states have internal predecessors, (41), 3 states have call successors, (3), 1 states have call predecessors, (3), 16 states have return successors, (29), 15 states have call predecessors, (29), 3 states have call successors, (29) Word has length 94 [2021-10-13 00:37:30,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:37:30,774 INFO L225 Difference]: With dead ends: 61 [2021-10-13 00:37:30,775 INFO L226 Difference]: Without dead ends: 57 [2021-10-13 00:37:30,776 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 263.6ms TimeCoverageRelationStatistics Valid=446, Invalid=814, Unknown=0, NotChecked=0, Total=1260 [2021-10-13 00:37:30,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-10-13 00:37:30,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2021-10-13 00:37:30,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 38 states have (on average 1.0263157894736843) internal successors, (39), 39 states have internal predecessors, (39), 2 states have call successors, (2), 1 states have call predecessors, (2), 16 states have return successors, (17), 16 states have call predecessors, (17), 2 states have call successors, (17) [2021-10-13 00:37:30,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2021-10-13 00:37:30,780 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 94 [2021-10-13 00:37:30,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:37:30,780 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2021-10-13 00:37:30,781 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.05) internal successors, (41), 21 states have internal predecessors, (41), 3 states have call successors, (3), 1 states have call predecessors, (3), 16 states have return successors, (29), 15 states have call predecessors, (29), 3 states have call successors, (29) [2021-10-13 00:37:30,781 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2021-10-13 00:37:30,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-10-13 00:37:30,782 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:37:30,782 INFO L512 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:37:30,817 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f8a0c0f-2983-487a-8822-ee4daa7a511c/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-10-13 00:37:31,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f8a0c0f-2983-487a-8822-ee4daa7a511c/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-10-13 00:37:31,007 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:37:31,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:37:31,008 INFO L82 PathProgramCache]: Analyzing trace with hash 415287702, now seen corresponding path program 15 times [2021-10-13 00:37:31,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:37:31,008 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212718247] [2021-10-13 00:37:31,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:37:31,008 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:37:31,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:31,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:31,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:31,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:31,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:31,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:31,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:31,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:31,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:31,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:31,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:31,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:31,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:31,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:31,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:31,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:31,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:31,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:31,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:31,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:31,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:31,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:31,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:31,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:31,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:31,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:31,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:31,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:31,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:31,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:31,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:31,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:31,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:31,474 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2021-10-13 00:37:31,475 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:37:31,475 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212718247] [2021-10-13 00:37:31,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212718247] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:37:31,475 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232776322] [2021-10-13 00:37:31,475 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 00:37:31,475 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:37:31,476 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f8a0c0f-2983-487a-8822-ee4daa7a511c/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:37:31,479 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f8a0c0f-2983-487a-8822-ee4daa7a511c/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:37:31,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f8a0c0f-2983-487a-8822-ee4daa7a511c/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-10-13 00:37:31,817 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-10-13 00:37:31,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:37:31,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 34 conjunts are in the unsatisfiable core [2021-10-13 00:37:31,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:37:32,181 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2021-10-13 00:37:32,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1232776322] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:37:32,181 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:37:32,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-10-13 00:37:32,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270949428] [2021-10-13 00:37:32,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-13 00:37:32,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:37:32,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-13 00:37:32,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=284, Unknown=0, NotChecked=0, Total=462 [2021-10-13 00:37:32,184 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand has 22 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 22 states have internal predecessors, (43), 3 states have call successors, (3), 1 states have call predecessors, (3), 17 states have return successors, (31), 16 states have call predecessors, (31), 3 states have call successors, (31) [2021-10-13 00:37:32,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:37:32,347 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2021-10-13 00:37:32,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-13 00:37:32,347 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 22 states have internal predecessors, (43), 3 states have call successors, (3), 1 states have call predecessors, (3), 17 states have return successors, (31), 16 states have call predecessors, (31), 3 states have call successors, (31) Word has length 100 [2021-10-13 00:37:32,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:37:32,348 INFO L225 Difference]: With dead ends: 64 [2021-10-13 00:37:32,348 INFO L226 Difference]: Without dead ends: 60 [2021-10-13 00:37:32,349 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 268.8ms TimeCoverageRelationStatistics Valid=499, Invalid=907, Unknown=0, NotChecked=0, Total=1406 [2021-10-13 00:37:32,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-10-13 00:37:32,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-10-13 00:37:32,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 40 states have (on average 1.025) internal successors, (41), 41 states have internal predecessors, (41), 2 states have call successors, (2), 1 states have call predecessors, (2), 17 states have return successors, (18), 17 states have call predecessors, (18), 2 states have call successors, (18) [2021-10-13 00:37:32,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2021-10-13 00:37:32,354 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 100 [2021-10-13 00:37:32,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:37:32,354 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2021-10-13 00:37:32,354 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 22 states have internal predecessors, (43), 3 states have call successors, (3), 1 states have call predecessors, (3), 17 states have return successors, (31), 16 states have call predecessors, (31), 3 states have call successors, (31) [2021-10-13 00:37:32,355 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2021-10-13 00:37:32,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-10-13 00:37:32,356 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:37:32,356 INFO L512 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:37:32,394 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f8a0c0f-2983-487a-8822-ee4daa7a511c/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-10-13 00:37:32,574 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f8a0c0f-2983-487a-8822-ee4daa7a511c/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-10-13 00:37:32,575 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:37:32,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:37:32,575 INFO L82 PathProgramCache]: Analyzing trace with hash 317812044, now seen corresponding path program 16 times [2021-10-13 00:37:32,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:37:32,575 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314464183] [2021-10-13 00:37:32,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:37:32,575 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:37:32,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:32,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:32,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:32,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:32,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:32,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:32,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:32,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:32,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:32,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:32,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:32,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:32,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:32,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:32,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:32,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:32,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:32,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:32,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:32,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:32,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:32,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:32,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:32,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:32,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:32,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:32,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:32,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:32,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:32,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:32,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:32,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:32,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:33,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:33,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:33,025 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2021-10-13 00:37:33,026 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:37:33,026 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314464183] [2021-10-13 00:37:33,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314464183] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:37:33,026 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364532589] [2021-10-13 00:37:33,026 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 00:37:33,026 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:37:33,027 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f8a0c0f-2983-487a-8822-ee4daa7a511c/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:37:33,031 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f8a0c0f-2983-487a-8822-ee4daa7a511c/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:37:33,051 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f8a0c0f-2983-487a-8822-ee4daa7a511c/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-10-13 00:37:33,367 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 00:37:33,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:37:33,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 36 conjunts are in the unsatisfiable core [2021-10-13 00:37:33,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:37:33,770 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2021-10-13 00:37:33,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364532589] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:37:33,770 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:37:33,770 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-10-13 00:37:33,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388457866] [2021-10-13 00:37:33,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-13 00:37:33,771 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:37:33,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-13 00:37:33,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=309, Unknown=0, NotChecked=0, Total=506 [2021-10-13 00:37:33,772 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand has 23 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 23 states have internal predecessors, (45), 3 states have call successors, (3), 1 states have call predecessors, (3), 18 states have return successors, (33), 17 states have call predecessors, (33), 3 states have call successors, (33) [2021-10-13 00:37:33,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:37:33,959 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2021-10-13 00:37:33,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-13 00:37:33,959 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 23 states have internal predecessors, (45), 3 states have call successors, (3), 1 states have call predecessors, (3), 18 states have return successors, (33), 17 states have call predecessors, (33), 3 states have call successors, (33) Word has length 106 [2021-10-13 00:37:33,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:37:33,960 INFO L225 Difference]: With dead ends: 67 [2021-10-13 00:37:33,960 INFO L226 Difference]: Without dead ends: 63 [2021-10-13 00:37:33,961 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 291.3ms TimeCoverageRelationStatistics Valid=555, Invalid=1005, Unknown=0, NotChecked=0, Total=1560 [2021-10-13 00:37:33,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-10-13 00:37:33,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2021-10-13 00:37:33,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 42 states have (on average 1.0238095238095237) internal successors, (43), 43 states have internal predecessors, (43), 2 states have call successors, (2), 1 states have call predecessors, (2), 18 states have return successors, (19), 18 states have call predecessors, (19), 2 states have call successors, (19) [2021-10-13 00:37:33,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2021-10-13 00:37:33,966 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 106 [2021-10-13 00:37:33,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:37:33,966 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2021-10-13 00:37:33,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 23 states have internal predecessors, (45), 3 states have call successors, (3), 1 states have call predecessors, (3), 18 states have return successors, (33), 17 states have call predecessors, (33), 3 states have call successors, (33) [2021-10-13 00:37:33,967 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2021-10-13 00:37:33,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-10-13 00:37:33,968 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:37:33,968 INFO L512 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:37:34,011 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f8a0c0f-2983-487a-8822-ee4daa7a511c/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-10-13 00:37:34,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f8a0c0f-2983-487a-8822-ee4daa7a511c/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-10-13 00:37:34,191 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:37:34,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:37:34,191 INFO L82 PathProgramCache]: Analyzing trace with hash -2122437418, now seen corresponding path program 17 times [2021-10-13 00:37:34,191 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:37:34,192 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202008135] [2021-10-13 00:37:34,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:37:34,192 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:37:34,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:34,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:34,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:34,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:34,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:34,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:34,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:34,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:34,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:34,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:34,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:34,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:34,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:34,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:34,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:34,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:34,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:34,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:34,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:34,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:34,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:34,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:34,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:34,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:34,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:34,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:34,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:34,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:34,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:34,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:34,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:34,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:34,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:34,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:34,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:34,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:34,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:34,705 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2021-10-13 00:37:34,705 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:37:34,705 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202008135] [2021-10-13 00:37:34,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202008135] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:37:34,705 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432816508] [2021-10-13 00:37:34,706 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 00:37:34,706 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:37:34,706 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f8a0c0f-2983-487a-8822-ee4daa7a511c/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:37:34,707 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f8a0c0f-2983-487a-8822-ee4daa7a511c/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:37:34,730 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f8a0c0f-2983-487a-8822-ee4daa7a511c/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-10-13 00:37:35,105 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-10-13 00:37:35,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:37:35,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 38 conjunts are in the unsatisfiable core [2021-10-13 00:37:35,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:37:35,518 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2021-10-13 00:37:35,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432816508] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:37:35,519 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:37:35,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2021-10-13 00:37:35,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853486563] [2021-10-13 00:37:35,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-10-13 00:37:35,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:37:35,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-13 00:37:35,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=335, Unknown=0, NotChecked=0, Total=552 [2021-10-13 00:37:35,521 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand has 24 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 24 states have internal predecessors, (47), 3 states have call successors, (3), 1 states have call predecessors, (3), 19 states have return successors, (35), 18 states have call predecessors, (35), 3 states have call successors, (35) [2021-10-13 00:37:35,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:37:35,731 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2021-10-13 00:37:35,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-13 00:37:35,732 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 24 states have internal predecessors, (47), 3 states have call successors, (3), 1 states have call predecessors, (3), 19 states have return successors, (35), 18 states have call predecessors, (35), 3 states have call successors, (35) Word has length 112 [2021-10-13 00:37:35,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:37:35,733 INFO L225 Difference]: With dead ends: 70 [2021-10-13 00:37:35,733 INFO L226 Difference]: Without dead ends: 66 [2021-10-13 00:37:35,734 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 338.8ms TimeCoverageRelationStatistics Valid=614, Invalid=1108, Unknown=0, NotChecked=0, Total=1722 [2021-10-13 00:37:35,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-10-13 00:37:35,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2021-10-13 00:37:35,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 44 states have (on average 1.0227272727272727) internal successors, (45), 45 states have internal predecessors, (45), 2 states have call successors, (2), 1 states have call predecessors, (2), 19 states have return successors, (20), 19 states have call predecessors, (20), 2 states have call successors, (20) [2021-10-13 00:37:35,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2021-10-13 00:37:35,738 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 112 [2021-10-13 00:37:35,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:37:35,738 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2021-10-13 00:37:35,738 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 24 states have internal predecessors, (47), 3 states have call successors, (3), 1 states have call predecessors, (3), 19 states have return successors, (35), 18 states have call predecessors, (35), 3 states have call successors, (35) [2021-10-13 00:37:35,739 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2021-10-13 00:37:35,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-10-13 00:37:35,740 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:37:35,740 INFO L512 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:37:35,775 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f8a0c0f-2983-487a-8822-ee4daa7a511c/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-10-13 00:37:35,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f8a0c0f-2983-487a-8822-ee4daa7a511c/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-10-13 00:37:35,959 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:37:35,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:37:35,959 INFO L82 PathProgramCache]: Analyzing trace with hash 55840780, now seen corresponding path program 18 times [2021-10-13 00:37:35,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:37:35,960 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758164000] [2021-10-13 00:37:35,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:37:35,960 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:37:35,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:36,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:36,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:36,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:36,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:36,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:36,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:36,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:36,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:36,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:36,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:36,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:36,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:36,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:36,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:36,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:36,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:36,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:36,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:36,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:36,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:36,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:36,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:36,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:36,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:36,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:36,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:36,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:36,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:36,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:36,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:36,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:36,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:36,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:36,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:36,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:36,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:36,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:36,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:36,562 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2021-10-13 00:37:36,562 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:37:36,562 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758164000] [2021-10-13 00:37:36,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758164000] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:37:36,562 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165664127] [2021-10-13 00:37:36,563 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 00:37:36,563 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:37:36,563 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f8a0c0f-2983-487a-8822-ee4daa7a511c/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:37:36,564 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f8a0c0f-2983-487a-8822-ee4daa7a511c/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:37:36,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f8a0c0f-2983-487a-8822-ee4daa7a511c/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-10-13 00:37:37,061 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-10-13 00:37:37,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:37:37,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 40 conjunts are in the unsatisfiable core [2021-10-13 00:37:37,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:37:37,379 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2021-10-13 00:37:37,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165664127] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:37:37,380 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:37:37,380 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 25 [2021-10-13 00:37:37,380 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160375411] [2021-10-13 00:37:37,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-10-13 00:37:37,381 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:37:37,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-10-13 00:37:37,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=362, Unknown=0, NotChecked=0, Total=600 [2021-10-13 00:37:37,382 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand has 25 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 25 states have internal predecessors, (49), 3 states have call successors, (3), 1 states have call predecessors, (3), 20 states have return successors, (37), 19 states have call predecessors, (37), 3 states have call successors, (37) [2021-10-13 00:37:37,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:37:37,604 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2021-10-13 00:37:37,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-13 00:37:37,604 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 25 states have internal predecessors, (49), 3 states have call successors, (3), 1 states have call predecessors, (3), 20 states have return successors, (37), 19 states have call predecessors, (37), 3 states have call successors, (37) Word has length 118 [2021-10-13 00:37:37,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:37:37,605 INFO L225 Difference]: With dead ends: 73 [2021-10-13 00:37:37,605 INFO L226 Difference]: Without dead ends: 69 [2021-10-13 00:37:37,606 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 351.7ms TimeCoverageRelationStatistics Valid=676, Invalid=1216, Unknown=0, NotChecked=0, Total=1892 [2021-10-13 00:37:37,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-10-13 00:37:37,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2021-10-13 00:37:37,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 46 states have (on average 1.0217391304347827) internal successors, (47), 47 states have internal predecessors, (47), 2 states have call successors, (2), 1 states have call predecessors, (2), 20 states have return successors, (21), 20 states have call predecessors, (21), 2 states have call successors, (21) [2021-10-13 00:37:37,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2021-10-13 00:37:37,610 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 118 [2021-10-13 00:37:37,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:37:37,611 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2021-10-13 00:37:37,611 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 25 states have internal predecessors, (49), 3 states have call successors, (3), 1 states have call predecessors, (3), 20 states have return successors, (37), 19 states have call predecessors, (37), 3 states have call successors, (37) [2021-10-13 00:37:37,611 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2021-10-13 00:37:37,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-10-13 00:37:37,612 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:37:37,612 INFO L512 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:37:37,647 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f8a0c0f-2983-487a-8822-ee4daa7a511c/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-10-13 00:37:37,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f8a0c0f-2983-487a-8822-ee4daa7a511c/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:37:37,839 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:37:37,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:37:37,839 INFO L82 PathProgramCache]: Analyzing trace with hash -806952938, now seen corresponding path program 19 times [2021-10-13 00:37:37,840 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:37:37,840 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376492398] [2021-10-13 00:37:37,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:37:37,840 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:37:37,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:37,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:37,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:37,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:37,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:38,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:38,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:38,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:38,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:38,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:38,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:38,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:38,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:38,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:38,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:38,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:38,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:38,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:38,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:38,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:38,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:38,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:38,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:38,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:38,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:38,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:38,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:38,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:38,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:38,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:38,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:38,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:38,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:38,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:38,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:38,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:38,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:38,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:38,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:38,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:38,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:38,511 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2021-10-13 00:37:38,512 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:37:38,512 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376492398] [2021-10-13 00:37:38,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376492398] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:37:38,512 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776893122] [2021-10-13 00:37:38,512 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-13 00:37:38,512 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:37:38,513 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f8a0c0f-2983-487a-8822-ee4daa7a511c/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:37:38,513 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f8a0c0f-2983-487a-8822-ee4daa7a511c/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:37:38,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f8a0c0f-2983-487a-8822-ee4daa7a511c/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-10-13 00:37:39,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:39,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 42 conjunts are in the unsatisfiable core [2021-10-13 00:37:39,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:37:39,449 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2021-10-13 00:37:39,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776893122] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:37:39,450 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:37:39,450 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 26 [2021-10-13 00:37:39,450 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787822131] [2021-10-13 00:37:39,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-10-13 00:37:39,451 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:37:39,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-10-13 00:37:39,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=390, Unknown=0, NotChecked=0, Total=650 [2021-10-13 00:37:39,452 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand has 26 states, 25 states have (on average 2.04) internal successors, (51), 26 states have internal predecessors, (51), 3 states have call successors, (3), 1 states have call predecessors, (3), 21 states have return successors, (39), 20 states have call predecessors, (39), 3 states have call successors, (39) [2021-10-13 00:37:39,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:37:39,684 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2021-10-13 00:37:39,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-13 00:37:39,684 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.04) internal successors, (51), 26 states have internal predecessors, (51), 3 states have call successors, (3), 1 states have call predecessors, (3), 21 states have return successors, (39), 20 states have call predecessors, (39), 3 states have call successors, (39) Word has length 124 [2021-10-13 00:37:39,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:37:39,686 INFO L225 Difference]: With dead ends: 76 [2021-10-13 00:37:39,686 INFO L226 Difference]: Without dead ends: 72 [2021-10-13 00:37:39,687 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 357.7ms TimeCoverageRelationStatistics Valid=741, Invalid=1329, Unknown=0, NotChecked=0, Total=2070 [2021-10-13 00:37:39,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-10-13 00:37:39,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2021-10-13 00:37:39,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 48 states have (on average 1.0208333333333333) internal successors, (49), 49 states have internal predecessors, (49), 2 states have call successors, (2), 1 states have call predecessors, (2), 21 states have return successors, (22), 21 states have call predecessors, (22), 2 states have call successors, (22) [2021-10-13 00:37:39,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2021-10-13 00:37:39,692 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 124 [2021-10-13 00:37:39,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:37:39,692 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2021-10-13 00:37:39,693 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.04) internal successors, (51), 26 states have internal predecessors, (51), 3 states have call successors, (3), 1 states have call predecessors, (3), 21 states have return successors, (39), 20 states have call predecessors, (39), 3 states have call successors, (39) [2021-10-13 00:37:39,693 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2021-10-13 00:37:39,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-10-13 00:37:39,694 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:37:39,694 INFO L512 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:37:39,732 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f8a0c0f-2983-487a-8822-ee4daa7a511c/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-10-13 00:37:39,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f8a0c0f-2983-487a-8822-ee4daa7a511c/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:37:39,907 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:37:39,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:37:39,908 INFO L82 PathProgramCache]: Analyzing trace with hash -1807457588, now seen corresponding path program 20 times [2021-10-13 00:37:39,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:37:39,908 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927907911] [2021-10-13 00:37:39,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:37:39,908 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:37:39,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:39,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:39,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:40,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:40,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:40,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:40,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:40,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:40,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:40,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:40,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:40,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:40,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:40,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:40,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:40,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:40,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:40,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:40,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:40,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:40,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:40,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:40,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:40,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:40,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:40,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:40,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:40,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:40,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:40,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:40,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:40,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:40,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:40,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:40,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:40,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:40,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:40,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:40,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:40,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:40,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:40,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:40,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:40,602 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2021-10-13 00:37:40,603 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:37:40,603 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927907911] [2021-10-13 00:37:40,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927907911] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:37:40,603 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078030079] [2021-10-13 00:37:40,603 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 00:37:40,603 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:37:40,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f8a0c0f-2983-487a-8822-ee4daa7a511c/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:37:40,607 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f8a0c0f-2983-487a-8822-ee4daa7a511c/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:37:40,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f8a0c0f-2983-487a-8822-ee4daa7a511c/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-10-13 00:37:41,194 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 00:37:41,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:37:41,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 44 conjunts are in the unsatisfiable core [2021-10-13 00:37:41,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:37:41,577 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2021-10-13 00:37:41,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078030079] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:37:41,577 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:37:41,577 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 27 [2021-10-13 00:37:41,578 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191302538] [2021-10-13 00:37:41,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-10-13 00:37:41,580 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:37:41,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-10-13 00:37:41,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=283, Invalid=419, Unknown=0, NotChecked=0, Total=702 [2021-10-13 00:37:41,581 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand has 27 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 27 states have internal predecessors, (53), 3 states have call successors, (3), 1 states have call predecessors, (3), 22 states have return successors, (41), 21 states have call predecessors, (41), 3 states have call successors, (41) [2021-10-13 00:37:41,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:37:41,817 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2021-10-13 00:37:41,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-10-13 00:37:41,817 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 27 states have internal predecessors, (53), 3 states have call successors, (3), 1 states have call predecessors, (3), 22 states have return successors, (41), 21 states have call predecessors, (41), 3 states have call successors, (41) Word has length 130 [2021-10-13 00:37:41,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:37:41,823 INFO L225 Difference]: With dead ends: 79 [2021-10-13 00:37:41,823 INFO L226 Difference]: Without dead ends: 75 [2021-10-13 00:37:41,825 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 396.8ms TimeCoverageRelationStatistics Valid=809, Invalid=1447, Unknown=0, NotChecked=0, Total=2256 [2021-10-13 00:37:41,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-10-13 00:37:41,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2021-10-13 00:37:41,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 50 states have (on average 1.02) internal successors, (51), 51 states have internal predecessors, (51), 2 states have call successors, (2), 1 states have call predecessors, (2), 22 states have return successors, (23), 22 states have call predecessors, (23), 2 states have call successors, (23) [2021-10-13 00:37:41,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2021-10-13 00:37:41,832 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 130 [2021-10-13 00:37:41,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:37:41,832 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2021-10-13 00:37:41,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 27 states have internal predecessors, (53), 3 states have call successors, (3), 1 states have call predecessors, (3), 22 states have return successors, (41), 21 states have call predecessors, (41), 3 states have call successors, (41) [2021-10-13 00:37:41,833 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2021-10-13 00:37:41,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-10-13 00:37:41,834 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:37:41,834 INFO L512 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:37:41,869 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f8a0c0f-2983-487a-8822-ee4daa7a511c/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-10-13 00:37:42,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f8a0c0f-2983-487a-8822-ee4daa7a511c/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:37:42,047 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:37:42,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:37:42,048 INFO L82 PathProgramCache]: Analyzing trace with hash 874439510, now seen corresponding path program 21 times [2021-10-13 00:37:42,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:37:42,048 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871344251] [2021-10-13 00:37:42,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:37:42,048 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:37:42,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:42,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:42,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:42,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:42,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:42,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:42,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:42,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:42,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:42,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:42,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:42,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:42,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:42,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:42,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:42,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:42,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:42,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:42,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:42,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:42,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:42,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:42,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:42,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:42,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:42,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:42,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:42,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:42,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:42,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:42,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:42,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:42,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:42,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:42,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:42,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:42,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:42,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:42,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:42,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:42,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:42,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:42,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:42,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:42,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:42,857 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2021-10-13 00:37:42,858 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:37:42,858 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871344251] [2021-10-13 00:37:42,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871344251] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:37:42,858 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445042493] [2021-10-13 00:37:42,858 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 00:37:42,859 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:37:42,859 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f8a0c0f-2983-487a-8822-ee4daa7a511c/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:37:42,863 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f8a0c0f-2983-487a-8822-ee4daa7a511c/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:37:42,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f8a0c0f-2983-487a-8822-ee4daa7a511c/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-10-13 00:37:43,405 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2021-10-13 00:37:43,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:37:43,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 46 conjunts are in the unsatisfiable core [2021-10-13 00:37:43,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:37:43,893 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2021-10-13 00:37:43,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445042493] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:37:43,893 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:37:43,893 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 28 [2021-10-13 00:37:43,894 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719378070] [2021-10-13 00:37:43,895 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-10-13 00:37:43,895 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:37:43,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-10-13 00:37:43,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=307, Invalid=449, Unknown=0, NotChecked=0, Total=756 [2021-10-13 00:37:43,896 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand has 28 states, 27 states have (on average 2.037037037037037) internal successors, (55), 28 states have internal predecessors, (55), 3 states have call successors, (3), 1 states have call predecessors, (3), 23 states have return successors, (43), 22 states have call predecessors, (43), 3 states have call successors, (43) [2021-10-13 00:37:44,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:37:44,184 INFO L93 Difference]: Finished difference Result 82 states and 83 transitions. [2021-10-13 00:37:44,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-13 00:37:44,187 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.037037037037037) internal successors, (55), 28 states have internal predecessors, (55), 3 states have call successors, (3), 1 states have call predecessors, (3), 23 states have return successors, (43), 22 states have call predecessors, (43), 3 states have call successors, (43) Word has length 136 [2021-10-13 00:37:44,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:37:44,188 INFO L225 Difference]: With dead ends: 82 [2021-10-13 00:37:44,188 INFO L226 Difference]: Without dead ends: 78 [2021-10-13 00:37:44,189 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 467.2ms TimeCoverageRelationStatistics Valid=880, Invalid=1570, Unknown=0, NotChecked=0, Total=2450 [2021-10-13 00:37:44,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-10-13 00:37:44,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2021-10-13 00:37:44,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 52 states have (on average 1.0192307692307692) internal successors, (53), 53 states have internal predecessors, (53), 2 states have call successors, (2), 1 states have call predecessors, (2), 23 states have return successors, (24), 23 states have call predecessors, (24), 2 states have call successors, (24) [2021-10-13 00:37:44,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2021-10-13 00:37:44,193 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 136 [2021-10-13 00:37:44,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:37:44,194 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2021-10-13 00:37:44,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.037037037037037) internal successors, (55), 28 states have internal predecessors, (55), 3 states have call successors, (3), 1 states have call predecessors, (3), 23 states have return successors, (43), 22 states have call predecessors, (43), 3 states have call successors, (43) [2021-10-13 00:37:44,194 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2021-10-13 00:37:44,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-10-13 00:37:44,198 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:37:44,199 INFO L512 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:37:44,234 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f8a0c0f-2983-487a-8822-ee4daa7a511c/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-10-13 00:37:44,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f8a0c0f-2983-487a-8822-ee4daa7a511c/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:37:44,399 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:37:44,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:37:44,400 INFO L82 PathProgramCache]: Analyzing trace with hash 849241484, now seen corresponding path program 22 times [2021-10-13 00:37:44,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:37:44,400 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036295001] [2021-10-13 00:37:44,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:37:44,400 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:37:44,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:44,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:44,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:44,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:44,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:44,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:44,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:44,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:44,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:44,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:44,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:44,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:44,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:44,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:44,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:44,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:44,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:44,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:44,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:44,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:44,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:44,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:44,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:44,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:44,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:44,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:44,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:44,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:44,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:44,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:44,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:44,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:45,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:45,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:45,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:45,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:45,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:45,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:45,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:45,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:45,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:45,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:45,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:45,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:45,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:45,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:45,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:45,236 INFO L134 CoverageAnalysis]: Checked inductivity of 1474 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2021-10-13 00:37:45,237 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:37:45,237 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036295001] [2021-10-13 00:37:45,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036295001] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:37:45,237 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059343886] [2021-10-13 00:37:45,237 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 00:37:45,237 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:37:45,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f8a0c0f-2983-487a-8822-ee4daa7a511c/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:37:45,238 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f8a0c0f-2983-487a-8822-ee4daa7a511c/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:37:45,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f8a0c0f-2983-487a-8822-ee4daa7a511c/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-10-13 00:37:45,941 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 00:37:45,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:37:45,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 48 conjunts are in the unsatisfiable core [2021-10-13 00:37:45,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:37:46,400 INFO L134 CoverageAnalysis]: Checked inductivity of 1474 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2021-10-13 00:37:46,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059343886] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:37:46,400 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:37:46,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 29 [2021-10-13 00:37:46,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234172333] [2021-10-13 00:37:46,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-10-13 00:37:46,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:37:46,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-10-13 00:37:46,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=332, Invalid=480, Unknown=0, NotChecked=0, Total=812 [2021-10-13 00:37:46,402 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand has 29 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 29 states have internal predecessors, (57), 3 states have call successors, (3), 1 states have call predecessors, (3), 24 states have return successors, (45), 23 states have call predecessors, (45), 3 states have call successors, (45) [2021-10-13 00:37:46,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:37:46,690 INFO L93 Difference]: Finished difference Result 85 states and 86 transitions. [2021-10-13 00:37:46,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-10-13 00:37:46,691 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 29 states have internal predecessors, (57), 3 states have call successors, (3), 1 states have call predecessors, (3), 24 states have return successors, (45), 23 states have call predecessors, (45), 3 states have call successors, (45) Word has length 142 [2021-10-13 00:37:46,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:37:46,692 INFO L225 Difference]: With dead ends: 85 [2021-10-13 00:37:46,692 INFO L226 Difference]: Without dead ends: 81 [2021-10-13 00:37:46,693 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 491.3ms TimeCoverageRelationStatistics Valid=954, Invalid=1698, Unknown=0, NotChecked=0, Total=2652 [2021-10-13 00:37:46,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-10-13 00:37:46,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2021-10-13 00:37:46,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 54 states have (on average 1.0185185185185186) internal successors, (55), 55 states have internal predecessors, (55), 2 states have call successors, (2), 1 states have call predecessors, (2), 24 states have return successors, (25), 24 states have call predecessors, (25), 2 states have call successors, (25) [2021-10-13 00:37:46,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2021-10-13 00:37:46,697 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 142 [2021-10-13 00:37:46,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:37:46,697 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2021-10-13 00:37:46,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 29 states have internal predecessors, (57), 3 states have call successors, (3), 1 states have call predecessors, (3), 24 states have return successors, (45), 23 states have call predecessors, (45), 3 states have call successors, (45) [2021-10-13 00:37:46,698 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2021-10-13 00:37:46,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-10-13 00:37:46,703 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:37:46,703 INFO L512 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:37:46,736 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f8a0c0f-2983-487a-8822-ee4daa7a511c/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2021-10-13 00:37:46,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f8a0c0f-2983-487a-8822-ee4daa7a511c/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-10-13 00:37:46,912 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:37:46,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:37:46,912 INFO L82 PathProgramCache]: Analyzing trace with hash 1665808022, now seen corresponding path program 23 times [2021-10-13 00:37:46,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:37:46,912 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132003644] [2021-10-13 00:37:46,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:37:46,913 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:37:46,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:46,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:47,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:47,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:47,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:47,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:47,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:47,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:47,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:47,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:47,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:47,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:47,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:47,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:47,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:47,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:47,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:47,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:47,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:47,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:47,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:47,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:47,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:47,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:47,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:47,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:47,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:47,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:47,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:47,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:47,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:47,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:47,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:47,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:47,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:47,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:47,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:47,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:47,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:47,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:47,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:47,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:47,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:47,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:47,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:47,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:47,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:47,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:47,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:47,827 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2021-10-13 00:37:47,827 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:37:47,827 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132003644] [2021-10-13 00:37:47,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132003644] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:37:47,828 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190999923] [2021-10-13 00:37:47,828 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 00:37:47,828 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:37:47,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f8a0c0f-2983-487a-8822-ee4daa7a511c/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:37:47,831 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f8a0c0f-2983-487a-8822-ee4daa7a511c/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:37:47,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f8a0c0f-2983-487a-8822-ee4daa7a511c/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-10-13 00:37:48,475 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2021-10-13 00:37:48,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:37:48,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 50 conjunts are in the unsatisfiable core [2021-10-13 00:37:48,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:37:48,951 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2021-10-13 00:37:48,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190999923] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:37:48,951 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:37:48,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 30 [2021-10-13 00:37:48,952 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711589029] [2021-10-13 00:37:48,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-10-13 00:37:48,952 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:37:48,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-10-13 00:37:48,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=358, Invalid=512, Unknown=0, NotChecked=0, Total=870 [2021-10-13 00:37:48,953 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand has 30 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 30 states have internal predecessors, (59), 3 states have call successors, (3), 1 states have call predecessors, (3), 25 states have return successors, (47), 24 states have call predecessors, (47), 3 states have call successors, (47) [2021-10-13 00:37:49,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:37:49,228 INFO L93 Difference]: Finished difference Result 88 states and 89 transitions. [2021-10-13 00:37:49,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-10-13 00:37:49,229 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 30 states have internal predecessors, (59), 3 states have call successors, (3), 1 states have call predecessors, (3), 25 states have return successors, (47), 24 states have call predecessors, (47), 3 states have call successors, (47) Word has length 148 [2021-10-13 00:37:49,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:37:49,230 INFO L225 Difference]: With dead ends: 88 [2021-10-13 00:37:49,230 INFO L226 Difference]: Without dead ends: 84 [2021-10-13 00:37:49,232 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 575 ImplicationChecksByTransitivity, 479.7ms TimeCoverageRelationStatistics Valid=1031, Invalid=1831, Unknown=0, NotChecked=0, Total=2862 [2021-10-13 00:37:49,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-10-13 00:37:49,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2021-10-13 00:37:49,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 56 states have (on average 1.0178571428571428) internal successors, (57), 57 states have internal predecessors, (57), 2 states have call successors, (2), 1 states have call predecessors, (2), 25 states have return successors, (26), 25 states have call predecessors, (26), 2 states have call successors, (26) [2021-10-13 00:37:49,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 85 transitions. [2021-10-13 00:37:49,236 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 85 transitions. Word has length 148 [2021-10-13 00:37:49,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:37:49,237 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 85 transitions. [2021-10-13 00:37:49,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 30 states have internal predecessors, (59), 3 states have call successors, (3), 1 states have call predecessors, (3), 25 states have return successors, (47), 24 states have call predecessors, (47), 3 states have call successors, (47) [2021-10-13 00:37:49,237 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 85 transitions. [2021-10-13 00:37:49,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-10-13 00:37:49,238 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:37:49,239 INFO L512 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:37:49,278 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f8a0c0f-2983-487a-8822-ee4daa7a511c/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-10-13 00:37:49,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f8a0c0f-2983-487a-8822-ee4daa7a511c/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-10-13 00:37:49,463 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:37:49,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:37:49,463 INFO L82 PathProgramCache]: Analyzing trace with hash 1715345484, now seen corresponding path program 24 times [2021-10-13 00:37:49,463 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:37:49,464 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693574076] [2021-10-13 00:37:49,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:37:49,464 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:37:49,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:49,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:49,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:49,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:49,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:49,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:49,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:49,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:49,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:49,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:49,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:49,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:49,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:49,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:49,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:49,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:49,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:49,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:49,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:49,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:49,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:49,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:49,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:49,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:50,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:50,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:50,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:50,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:50,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:50,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:50,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:50,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:50,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:50,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:50,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:50,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:50,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:50,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:50,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:50,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:50,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:50,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:50,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:50,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:50,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:50,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:50,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:50,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:50,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:50,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:50,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:50,409 INFO L134 CoverageAnalysis]: Checked inductivity of 1752 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2021-10-13 00:37:50,409 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:37:50,409 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693574076] [2021-10-13 00:37:50,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693574076] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:37:50,409 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841492654] [2021-10-13 00:37:50,410 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 00:37:50,410 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:37:50,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f8a0c0f-2983-487a-8822-ee4daa7a511c/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:37:50,415 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f8a0c0f-2983-487a-8822-ee4daa7a511c/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:37:50,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f8a0c0f-2983-487a-8822-ee4daa7a511c/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-10-13 00:37:51,119 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2021-10-13 00:37:51,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:37:51,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 52 conjunts are in the unsatisfiable core [2021-10-13 00:37:51,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:37:51,608 INFO L134 CoverageAnalysis]: Checked inductivity of 1752 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2021-10-13 00:37:51,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841492654] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:37:51,609 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:37:51,609 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 31 [2021-10-13 00:37:51,609 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854135551] [2021-10-13 00:37:51,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-10-13 00:37:51,611 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:37:51,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-10-13 00:37:51,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=385, Invalid=545, Unknown=0, NotChecked=0, Total=930 [2021-10-13 00:37:51,613 INFO L87 Difference]: Start difference. First operand 84 states and 85 transitions. Second operand has 31 states, 30 states have (on average 2.033333333333333) internal successors, (61), 31 states have internal predecessors, (61), 3 states have call successors, (3), 1 states have call predecessors, (3), 26 states have return successors, (49), 25 states have call predecessors, (49), 3 states have call successors, (49) [2021-10-13 00:37:51,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:37:51,926 INFO L93 Difference]: Finished difference Result 91 states and 92 transitions. [2021-10-13 00:37:51,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-13 00:37:51,927 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.033333333333333) internal successors, (61), 31 states have internal predecessors, (61), 3 states have call successors, (3), 1 states have call predecessors, (3), 26 states have return successors, (49), 25 states have call predecessors, (49), 3 states have call successors, (49) Word has length 154 [2021-10-13 00:37:51,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:37:51,928 INFO L225 Difference]: With dead ends: 91 [2021-10-13 00:37:51,928 INFO L226 Difference]: Without dead ends: 87 [2021-10-13 00:37:51,930 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 624 ImplicationChecksByTransitivity, 567.5ms TimeCoverageRelationStatistics Valid=1111, Invalid=1969, Unknown=0, NotChecked=0, Total=3080 [2021-10-13 00:37:51,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-10-13 00:37:51,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2021-10-13 00:37:51,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 58 states have (on average 1.0172413793103448) internal successors, (59), 59 states have internal predecessors, (59), 2 states have call successors, (2), 1 states have call predecessors, (2), 26 states have return successors, (27), 26 states have call predecessors, (27), 2 states have call successors, (27) [2021-10-13 00:37:51,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2021-10-13 00:37:51,934 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 154 [2021-10-13 00:37:51,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:37:51,935 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2021-10-13 00:37:51,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.033333333333333) internal successors, (61), 31 states have internal predecessors, (61), 3 states have call successors, (3), 1 states have call predecessors, (3), 26 states have return successors, (49), 25 states have call predecessors, (49), 3 states have call successors, (49) [2021-10-13 00:37:51,935 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2021-10-13 00:37:51,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-10-13 00:37:51,936 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:37:51,936 INFO L512 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:37:51,975 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f8a0c0f-2983-487a-8822-ee4daa7a511c/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-10-13 00:37:52,136 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f8a0c0f-2983-487a-8822-ee4daa7a511c/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-10-13 00:37:52,137 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:37:52,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:37:52,137 INFO L82 PathProgramCache]: Analyzing trace with hash -678635050, now seen corresponding path program 25 times [2021-10-13 00:37:52,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:37:52,137 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091286611] [2021-10-13 00:37:52,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:37:52,137 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:37:52,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:52,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:52,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:52,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:52,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:52,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:52,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:52,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:52,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:52,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:52,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:52,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:52,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:52,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:52,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:53,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:53,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:53,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:53,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:53,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:53,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:53,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:53,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:53,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:53,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:53,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:53,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:53,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:53,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:53,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:53,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:53,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:53,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:53,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:53,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:53,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:53,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:53,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:53,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:54,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:54,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:54,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:54,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:54,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:54,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:54,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:54,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:54,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:54,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:54,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:54,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:54,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:54,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:54,671 INFO L134 CoverageAnalysis]: Checked inductivity of 1900 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2021-10-13 00:37:54,673 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:37:54,673 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091286611] [2021-10-13 00:37:54,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091286611] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:37:54,674 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080674887] [2021-10-13 00:37:54,674 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-13 00:37:54,674 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:37:54,674 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f8a0c0f-2983-487a-8822-ee4daa7a511c/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:37:54,675 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f8a0c0f-2983-487a-8822-ee4daa7a511c/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:37:54,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f8a0c0f-2983-487a-8822-ee4daa7a511c/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-10-13 00:37:55,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:55,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 107 conjunts are in the unsatisfiable core [2021-10-13 00:37:55,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:37:56,174 INFO L134 CoverageAnalysis]: Checked inductivity of 1900 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2021-10-13 00:37:56,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080674887] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:37:56,175 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:37:56,175 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2021-10-13 00:37:56,175 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606230772] [2021-10-13 00:37:56,176 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-10-13 00:37:56,176 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:37:56,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-10-13 00:37:56,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=2863, Unknown=0, NotChecked=0, Total=2970 [2021-10-13 00:37:56,179 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand has 55 states, 55 states have (on average 1.0727272727272728) internal successors, (59), 29 states have internal predecessors, (59), 1 states have call successors, (2), 1 states have call predecessors, (2), 26 states have return successors, (26), 26 states have call predecessors, (26), 1 states have call successors, (26) [2021-10-13 00:37:57,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:37:57,098 INFO L93 Difference]: Finished difference Result 94 states and 95 transitions. [2021-10-13 00:37:57,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-10-13 00:37:57,099 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.0727272727272728) internal successors, (59), 29 states have internal predecessors, (59), 1 states have call successors, (2), 1 states have call predecessors, (2), 26 states have return successors, (26), 26 states have call predecessors, (26), 1 states have call successors, (26) Word has length 160 [2021-10-13 00:37:57,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:37:57,100 INFO L225 Difference]: With dead ends: 94 [2021-10-13 00:37:57,100 INFO L226 Difference]: Without dead ends: 90 [2021-10-13 00:37:57,101 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 211 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1325.5ms TimeCoverageRelationStatistics Valid=107, Invalid=2863, Unknown=0, NotChecked=0, Total=2970 [2021-10-13 00:37:57,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-10-13 00:37:57,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2021-10-13 00:37:57,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 60 states have (on average 1.0166666666666666) internal successors, (61), 61 states have internal predecessors, (61), 2 states have call successors, (2), 1 states have call predecessors, (2), 27 states have return successors, (28), 27 states have call predecessors, (28), 2 states have call successors, (28) [2021-10-13 00:37:57,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 91 transitions. [2021-10-13 00:37:57,106 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 91 transitions. Word has length 160 [2021-10-13 00:37:57,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:37:57,106 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 91 transitions. [2021-10-13 00:37:57,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.0727272727272728) internal successors, (59), 29 states have internal predecessors, (59), 1 states have call successors, (2), 1 states have call predecessors, (2), 26 states have return successors, (26), 26 states have call predecessors, (26), 1 states have call successors, (26) [2021-10-13 00:37:57,107 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 91 transitions. [2021-10-13 00:37:57,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-10-13 00:37:57,108 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:37:57,108 INFO L512 BasicCegarLoop]: trace histogram [27, 27, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:37:57,146 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f8a0c0f-2983-487a-8822-ee4daa7a511c/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-10-13 00:37:57,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f8a0c0f-2983-487a-8822-ee4daa7a511c/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-10-13 00:37:57,323 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:37:57,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:37:57,323 INFO L82 PathProgramCache]: Analyzing trace with hash -1845527796, now seen corresponding path program 26 times [2021-10-13 00:37:57,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:37:57,324 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072862063] [2021-10-13 00:37:57,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:37:57,324 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:37:57,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:57,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:57,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:57,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:57,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:57,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:57,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:57,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:57,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:57,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:57,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:57,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:57,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:57,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:57,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:57,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:57,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:57,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:57,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:57,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:57,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:57,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:57,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:57,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:57,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:57,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:58,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:58,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:58,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:58,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:58,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:58,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:58,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:58,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:58,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:58,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:58,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:58,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:58,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:58,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:58,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:58,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:58,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:58,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:58,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:58,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:58,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:58,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:58,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:58,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:58,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:58,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:58,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:58,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-13 00:37:58,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:37:58,410 INFO L134 CoverageAnalysis]: Checked inductivity of 2054 backedges. 975 proven. 52 refuted. 0 times theorem prover too weak. 1027 trivial. 0 not checked. [2021-10-13 00:37:58,410 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:37:58,410 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072862063] [2021-10-13 00:37:58,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072862063] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:37:58,410 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268009322] [2021-10-13 00:37:58,411 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 00:37:58,411 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:37:58,411 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f8a0c0f-2983-487a-8822-ee4daa7a511c/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:37:58,412 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f8a0c0f-2983-487a-8822-ee4daa7a511c/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:37:58,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f8a0c0f-2983-487a-8822-ee4daa7a511c/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-10-13 00:37:59,228 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 00:37:59,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:37:59,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 56 conjunts are in the unsatisfiable core [2021-10-13 00:37:59,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:37:59,798 INFO L134 CoverageAnalysis]: Checked inductivity of 2054 backedges. 1027 proven. 0 refuted. 0 times theorem prover too weak. 1027 trivial. 0 not checked. [2021-10-13 00:37:59,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268009322] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:37:59,799 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-13 00:37:59,799 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [31] total 33 [2021-10-13 00:37:59,799 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754068750] [2021-10-13 00:37:59,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-10-13 00:37:59,800 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:37:59,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-10-13 00:37:59,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=416, Invalid=640, Unknown=0, NotChecked=0, Total=1056 [2021-10-13 00:37:59,801 INFO L87 Difference]: Start difference. First operand 90 states and 91 transitions. Second operand has 31 states, 30 states have (on average 2.033333333333333) internal successors, (61), 31 states have internal predecessors, (61), 2 states have call successors, (2), 1 states have call predecessors, (2), 27 states have return successors, (27), 27 states have call predecessors, (27), 2 states have call successors, (27) [2021-10-13 00:38:00,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:38:00,358 INFO L93 Difference]: Finished difference Result 90 states and 91 transitions. [2021-10-13 00:38:00,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-10-13 00:38:00,359 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.033333333333333) internal successors, (61), 31 states have internal predecessors, (61), 2 states have call successors, (2), 1 states have call predecessors, (2), 27 states have return successors, (27), 27 states have call predecessors, (27), 2 states have call successors, (27) Word has length 166 [2021-10-13 00:38:00,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:38:00,360 INFO L225 Difference]: With dead ends: 90 [2021-10-13 00:38:00,360 INFO L226 Difference]: Without dead ends: 0 [2021-10-13 00:38:00,362 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 792.8ms TimeCoverageRelationStatistics Valid=1226, Invalid=2314, Unknown=0, NotChecked=0, Total=3540 [2021-10-13 00:38:00,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-13 00:38:00,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-13 00:38:00,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:38:00,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-13 00:38:00,362 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 166 [2021-10-13 00:38:00,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:38:00,362 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-13 00:38:00,362 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.033333333333333) internal successors, (61), 31 states have internal predecessors, (61), 2 states have call successors, (2), 1 states have call predecessors, (2), 27 states have return successors, (27), 27 states have call predecessors, (27), 2 states have call successors, (27) [2021-10-13 00:38:00,363 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-13 00:38:00,363 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-13 00:38:00,365 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 00:38:00,406 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f8a0c0f-2983-487a-8822-ee4daa7a511c/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-10-13 00:38:00,585 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f8a0c0f-2983-487a-8822-ee4daa7a511c/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-10-13 00:38:00,587 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-10-13 00:38:00,590 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 00:38:00,592 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 00:38:00,593 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 00:38:00,595 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 00:38:00,596 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 00:38:00,605 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-10-13 00:38:00,605 INFO L857 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-10-13 00:38:00,605 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-10-13 00:38:00,605 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-10-13 00:38:00,605 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 15) no Hoare annotation was computed. [2021-10-13 00:38:00,605 INFO L857 garLoopResultBuilder]: For program point L15(line 15) no Hoare annotation was computed. [2021-10-13 00:38:00,605 INFO L857 garLoopResultBuilder]: For program point L14(lines 14 16) no Hoare annotation was computed. [2021-10-13 00:38:00,605 INFO L853 garLoopResultBuilder]: At program point L13(line 13) the Hoare annotation is: (and (<= 25 ULTIMATE.start_main_~input~0) (<= ULTIMATE.start_main_~input~0 25)) [2021-10-13 00:38:00,605 INFO L857 garLoopResultBuilder]: For program point L13-1(line 13) no Hoare annotation was computed. [2021-10-13 00:38:00,605 INFO L857 garLoopResultBuilder]: For program point L11(lines 11 17) no Hoare annotation was computed. [2021-10-13 00:38:00,605 INFO L857 garLoopResultBuilder]: For program point idFINAL(lines 6 9) no Hoare annotation was computed. [2021-10-13 00:38:00,606 INFO L857 garLoopResultBuilder]: For program point idEXIT(lines 6 9) no Hoare annotation was computed. [2021-10-13 00:38:00,606 INFO L853 garLoopResultBuilder]: At program point L8(line 8) the Hoare annotation is: (= |id_#in~x| id_~x) [2021-10-13 00:38:00,606 INFO L860 garLoopResultBuilder]: At program point idENTRY(lines 6 9) the Hoare annotation is: true [2021-10-13 00:38:00,606 INFO L857 garLoopResultBuilder]: For program point L7(line 7) no Hoare annotation was computed. [2021-10-13 00:38:00,606 INFO L857 garLoopResultBuilder]: For program point L8-1(line 8) no Hoare annotation was computed. [2021-10-13 00:38:00,610 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 00:38:00,612 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 12:38:00 BoogieIcfgContainer [2021-10-13 00:38:00,612 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 00:38:00,613 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-13 00:38:00,613 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-13 00:38:00,613 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-13 00:38:00,614 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 12:37:16" (3/4) ... [2021-10-13 00:38:00,616 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-13 00:38:00,621 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure id [2021-10-13 00:38:00,624 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2021-10-13 00:38:00,624 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-13 00:38:00,624 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-13 00:38:00,624 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-13 00:38:00,647 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f8a0c0f-2983-487a-8822-ee4daa7a511c/bin/uautomizer-WNIpwEf4Nt/witness.graphml [2021-10-13 00:38:00,647 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-13 00:38:00,648 INFO L168 Benchmark]: Toolchain (without parser) took 44831.27 ms. Allocated memory was 92.3 MB in the beginning and 450.9 MB in the end (delta: 358.6 MB). Free memory was 58.5 MB in the beginning and 201.7 MB in the end (delta: -143.2 MB). Peak memory consumption was 215.9 MB. Max. memory is 16.1 GB. [2021-10-13 00:38:00,648 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 92.3 MB. Free memory was 63.1 MB in the beginning and 63.0 MB in the end (delta: 30.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 00:38:00,649 INFO L168 Benchmark]: CACSL2BoogieTranslator took 329.39 ms. Allocated memory is still 92.3 MB. Free memory was 58.3 MB in the beginning and 69.1 MB in the end (delta: -10.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-13 00:38:00,649 INFO L168 Benchmark]: Boogie Procedure Inliner took 32.41 ms. Allocated memory is still 92.3 MB. Free memory was 69.1 MB in the beginning and 67.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 00:38:00,649 INFO L168 Benchmark]: Boogie Preprocessor took 16.48 ms. Allocated memory is still 92.3 MB. Free memory was 67.8 MB in the beginning and 67.0 MB in the end (delta: 739.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 00:38:00,650 INFO L168 Benchmark]: RCFGBuilder took 239.38 ms. Allocated memory is still 92.3 MB. Free memory was 67.0 MB in the beginning and 58.0 MB in the end (delta: 9.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-13 00:38:00,650 INFO L168 Benchmark]: TraceAbstraction took 44172.44 ms. Allocated memory was 92.3 MB in the beginning and 450.9 MB in the end (delta: 358.6 MB). Free memory was 57.6 MB in the beginning and 203.8 MB in the end (delta: -146.1 MB). Peak memory consumption was 214.6 MB. Max. memory is 16.1 GB. [2021-10-13 00:38:00,650 INFO L168 Benchmark]: Witness Printer took 34.23 ms. Allocated memory is still 450.9 MB. Free memory was 203.8 MB in the beginning and 201.7 MB in the end (delta: 2.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-13 00:38:00,652 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 92.3 MB. Free memory was 63.1 MB in the beginning and 63.0 MB in the end (delta: 30.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 329.39 ms. Allocated memory is still 92.3 MB. Free memory was 58.3 MB in the beginning and 69.1 MB in the end (delta: -10.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 32.41 ms. Allocated memory is still 92.3 MB. Free memory was 69.1 MB in the beginning and 67.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 16.48 ms. Allocated memory is still 92.3 MB. Free memory was 67.8 MB in the beginning and 67.0 MB in the end (delta: 739.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 239.38 ms. Allocated memory is still 92.3 MB. Free memory was 67.0 MB in the beginning and 58.0 MB in the end (delta: 9.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 44172.44 ms. Allocated memory was 92.3 MB in the beginning and 450.9 MB in the end (delta: 358.6 MB). Free memory was 57.6 MB in the beginning and 203.8 MB in the end (delta: -146.1 MB). Peak memory consumption was 214.6 MB. Max. memory is 16.1 GB. * Witness Printer took 34.23 ms. Allocated memory is still 450.9 MB. Free memory was 203.8 MB in the beginning and 201.7 MB in the end (delta: 2.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 15]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 16 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 44113.0ms, OverallIterations: 27, TraceHistogramMax: 27, EmptinessCheckTime: 56.7ms, AutomataDifference: 5576.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 18.6ms, InitialAbstractionConstructionTime: 11.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 373 SDtfs, 1247 SDslu, 4142 SDs, 0 SdLazy, 3191 SolverSat, 296 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1694.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3933 GetRequests, 3072 SyntacticMatches, 2 SemanticMatches, 859 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5551 ImplicationChecksByTransitivity, 8150.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=90occurred in iteration=26, InterpolantAutomatonStates: 511, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 217.8ms AutomataMinimizationTime, 27 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 3 LocationsWithAnnotation, 5 PreInvPairs, 5 NumberOfFragments, 11 HoareAnnotationTreeSize, 5 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 7.3ms HoareSimplificationTime, 3 FomulaSimplificationsInter, 4 FormulaSimplificationTreeSizeReductionInter, 6.0ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 282.2ms SsaConstructionTime, 1411.5ms SatisfiabilityAnalysisTime, 22236.0ms InterpolantComputationTime, 4742 NumberOfCodeBlocks, 4742 NumberOfCodeBlocksAsserted, 226 NumberOfCheckSat, 4689 ConstructedInterpolants, 0 QuantifiedInterpolants, 12541 SizeOfPredicates, 352 NumberOfNonLiveVariables, 6266 ConjunctsInSsa, 859 ConjunctsInUnsatCore, 53 InterpolantComputations, 2 PerfectInterpolantSequences, 20956/37908 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-10-13 00:38:00,682 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f8a0c0f-2983-487a-8822-ee4daa7a511c/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...