./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/verifythis/elimination_max_rec_onepoint.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_691190e7-8c70-4734-961f-7afe1496c1fb/bin/uautomizer-w2VwFs6gM0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_691190e7-8c70-4734-961f-7afe1496c1fb/bin/uautomizer-w2VwFs6gM0/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_691190e7-8c70-4734-961f-7afe1496c1fb/bin/uautomizer-w2VwFs6gM0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_691190e7-8c70-4734-961f-7afe1496c1fb/bin/uautomizer-w2VwFs6gM0/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/verifythis/elimination_max_rec_onepoint.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_691190e7-8c70-4734-961f-7afe1496c1fb/bin/uautomizer-w2VwFs6gM0/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_691190e7-8c70-4734-961f-7afe1496c1fb/bin/uautomizer-w2VwFs6gM0 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3a80fea07b3dad363ac033c87feb8bfcf28a57d2e75bc95b67f90908b133efe1 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-22 14:40:01,137 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-22 14:40:01,140 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-22 14:40:01,176 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-22 14:40:01,177 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-22 14:40:01,179 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-22 14:40:01,181 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-22 14:40:01,184 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-22 14:40:01,186 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-22 14:40:01,188 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-22 14:40:01,189 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-22 14:40:01,191 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-22 14:40:01,192 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-22 14:40:01,193 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-22 14:40:01,195 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-22 14:40:01,197 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-22 14:40:01,198 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-22 14:40:01,200 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-22 14:40:01,203 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-22 14:40:01,207 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-22 14:40:01,209 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-22 14:40:01,211 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-22 14:40:01,213 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-22 14:40:01,215 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-22 14:40:01,220 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-22 14:40:01,220 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-22 14:40:01,221 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-22 14:40:01,222 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-22 14:40:01,223 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-22 14:40:01,225 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-22 14:40:01,225 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-22 14:40:01,227 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-22 14:40:01,228 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-22 14:40:01,229 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-22 14:40:01,231 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-22 14:40:01,231 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-22 14:40:01,240 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-22 14:40:01,241 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-22 14:40:01,241 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-22 14:40:01,243 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-22 14:40:01,244 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-22 14:40:01,245 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_691190e7-8c70-4734-961f-7afe1496c1fb/bin/uautomizer-w2VwFs6gM0/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-11-22 14:40:01,299 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-22 14:40:01,303 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-22 14:40:01,305 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-22 14:40:01,305 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-22 14:40:01,308 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-22 14:40:01,309 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-22 14:40:01,309 INFO L138 SettingsManager]: * Use SBE=true [2021-11-22 14:40:01,309 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-22 14:40:01,309 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-22 14:40:01,309 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-22 14:40:01,310 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-22 14:40:01,310 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-22 14:40:01,310 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-22 14:40:01,310 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-22 14:40:01,310 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-22 14:40:01,310 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-22 14:40:01,311 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-22 14:40:01,311 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-22 14:40:01,311 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-22 14:40:01,311 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-22 14:40:01,311 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-22 14:40:01,311 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-22 14:40:01,312 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-22 14:40:01,312 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-22 14:40:01,312 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-22 14:40:01,313 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-22 14:40:01,313 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-22 14:40:01,313 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-22 14:40:01,313 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-22 14:40:01,314 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_691190e7-8c70-4734-961f-7afe1496c1fb/bin/uautomizer-w2VwFs6gM0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_691190e7-8c70-4734-961f-7afe1496c1fb/bin/uautomizer-w2VwFs6gM0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3a80fea07b3dad363ac033c87feb8bfcf28a57d2e75bc95b67f90908b133efe1 [2021-11-22 14:40:01,654 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-22 14:40:01,683 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-22 14:40:01,686 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-22 14:40:01,689 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-22 14:40:01,690 INFO L275 PluginConnector]: CDTParser initialized [2021-11-22 14:40:01,692 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_691190e7-8c70-4734-961f-7afe1496c1fb/bin/uautomizer-w2VwFs6gM0/../../sv-benchmarks/c/verifythis/elimination_max_rec_onepoint.c [2021-11-22 14:40:01,781 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_691190e7-8c70-4734-961f-7afe1496c1fb/bin/uautomizer-w2VwFs6gM0/data/4dbfec9d6/efda5bb13696437ba6fc71c1bf45e951/FLAGc2b88e51c [2021-11-22 14:40:02,335 INFO L306 CDTParser]: Found 1 translation units. [2021-11-22 14:40:02,336 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_691190e7-8c70-4734-961f-7afe1496c1fb/sv-benchmarks/c/verifythis/elimination_max_rec_onepoint.c [2021-11-22 14:40:02,343 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_691190e7-8c70-4734-961f-7afe1496c1fb/bin/uautomizer-w2VwFs6gM0/data/4dbfec9d6/efda5bb13696437ba6fc71c1bf45e951/FLAGc2b88e51c [2021-11-22 14:40:02,702 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_691190e7-8c70-4734-961f-7afe1496c1fb/bin/uautomizer-w2VwFs6gM0/data/4dbfec9d6/efda5bb13696437ba6fc71c1bf45e951 [2021-11-22 14:40:02,714 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-22 14:40:02,715 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-22 14:40:02,718 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-22 14:40:02,718 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-22 14:40:02,725 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-22 14:40:02,726 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:40:02" (1/1) ... [2021-11-22 14:40:02,729 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b34d0af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:40:02, skipping insertion in model container [2021-11-22 14:40:02,730 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:40:02" (1/1) ... [2021-11-22 14:40:02,741 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-22 14:40:02,760 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-22 14:40:02,943 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_691190e7-8c70-4734-961f-7afe1496c1fb/sv-benchmarks/c/verifythis/elimination_max_rec_onepoint.c[502,515] [2021-11-22 14:40:02,967 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 14:40:02,982 INFO L203 MainTranslator]: Completed pre-run [2021-11-22 14:40:02,997 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_691190e7-8c70-4734-961f-7afe1496c1fb/sv-benchmarks/c/verifythis/elimination_max_rec_onepoint.c[502,515] [2021-11-22 14:40:03,009 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 14:40:03,027 INFO L208 MainTranslator]: Completed translation [2021-11-22 14:40:03,027 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:40:03 WrapperNode [2021-11-22 14:40:03,028 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-22 14:40:03,029 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-22 14:40:03,030 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-22 14:40:03,030 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-22 14:40:03,040 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:40:03" (1/1) ... [2021-11-22 14:40:03,050 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:40:03" (1/1) ... [2021-11-22 14:40:03,078 INFO L137 Inliner]: procedures = 19, calls = 24, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 98 [2021-11-22 14:40:03,078 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-22 14:40:03,079 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-22 14:40:03,080 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-22 14:40:03,080 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-22 14:40:03,090 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:40:03" (1/1) ... [2021-11-22 14:40:03,091 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:40:03" (1/1) ... [2021-11-22 14:40:03,094 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:40:03" (1/1) ... [2021-11-22 14:40:03,095 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:40:03" (1/1) ... [2021-11-22 14:40:03,103 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:40:03" (1/1) ... [2021-11-22 14:40:03,106 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:40:03" (1/1) ... [2021-11-22 14:40:03,108 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:40:03" (1/1) ... [2021-11-22 14:40:03,111 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-22 14:40:03,113 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-22 14:40:03,113 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-22 14:40:03,113 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-22 14:40:03,114 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:40:03" (1/1) ... [2021-11-22 14:40:03,124 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-22 14:40:03,142 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_691190e7-8c70-4734-961f-7afe1496c1fb/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:40:03,156 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_691190e7-8c70-4734-961f-7afe1496c1fb/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-22 14:40:03,185 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_691190e7-8c70-4734-961f-7afe1496c1fb/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-22 14:40:03,219 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-22 14:40:03,220 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-22 14:40:03,220 INFO L130 BoogieDeclarations]: Found specification of procedure check [2021-11-22 14:40:03,220 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2021-11-22 14:40:03,221 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-22 14:40:03,221 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-22 14:40:03,221 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-22 14:40:03,221 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-22 14:40:03,222 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-22 14:40:03,313 INFO L236 CfgBuilder]: Building ICFG [2021-11-22 14:40:03,314 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-22 14:40:03,545 INFO L277 CfgBuilder]: Performing block encoding [2021-11-22 14:40:03,555 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-22 14:40:03,556 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-22 14:40:03,558 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:40:03 BoogieIcfgContainer [2021-11-22 14:40:03,558 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-22 14:40:03,560 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-22 14:40:03,561 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-22 14:40:03,566 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-22 14:40:03,566 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 02:40:02" (1/3) ... [2021-11-22 14:40:03,567 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39311662 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:40:03, skipping insertion in model container [2021-11-22 14:40:03,567 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:40:03" (2/3) ... [2021-11-22 14:40:03,568 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39311662 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:40:03, skipping insertion in model container [2021-11-22 14:40:03,568 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:40:03" (3/3) ... [2021-11-22 14:40:03,569 INFO L111 eAbstractionObserver]: Analyzing ICFG elimination_max_rec_onepoint.c [2021-11-22 14:40:03,576 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-22 14:40:03,576 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 19 error locations. [2021-11-22 14:40:03,632 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-22 14:40:03,641 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-22 14:40:03,641 INFO L340 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2021-11-22 14:40:03,661 INFO L276 IsEmpty]: Start isEmpty. Operand has 62 states, 39 states have (on average 1.6923076923076923) internal successors, (66), 58 states have internal predecessors, (66), 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) [2021-11-22 14:40:03,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-22 14:40:03,672 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:40:03,672 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:40:03,673 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting checkErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 14:40:03,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:40:03,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1701999651, now seen corresponding path program 1 times [2021-11-22 14:40:03,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:40:03,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912732658] [2021-11-22 14:40:03,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:40:03,721 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:40:03,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:40:04,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:40:04,021 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:40:04,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912732658] [2021-11-22 14:40:04,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912732658] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:40:04,022 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:40:04,023 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-22 14:40:04,025 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672174168] [2021-11-22 14:40:04,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:40:04,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-22 14:40:04,031 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:40:04,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-22 14:40:04,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-22 14:40:04,072 INFO L87 Difference]: Start difference. First operand has 62 states, 39 states have (on average 1.6923076923076923) internal successors, (66), 58 states have internal predecessors, (66), 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 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:40:04,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:40:04,097 INFO L93 Difference]: Finished difference Result 62 states and 64 transitions. [2021-11-22 14:40:04,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-22 14:40:04,100 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-22 14:40:04,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:40:04,109 INFO L225 Difference]: With dead ends: 62 [2021-11-22 14:40:04,110 INFO L226 Difference]: Without dead ends: 60 [2021-11-22 14:40:04,112 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-22 14:40:04,117 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 14:40:04,118 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 14:40:04,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-11-22 14:40:04,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-11-22 14:40:04,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 38 states have (on average 1.5263157894736843) internal successors, (58), 56 states have internal predecessors, (58), 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) [2021-11-22 14:40:04,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2021-11-22 14:40:04,168 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 12 [2021-11-22 14:40:04,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:40:04,168 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2021-11-22 14:40:04,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:40:04,169 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2021-11-22 14:40:04,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-22 14:40:04,170 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:40:04,171 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:40:04,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-22 14:40:04,171 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting checkErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 14:40:04,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:40:04,173 INFO L85 PathProgramCache]: Analyzing trace with hash 499626015, now seen corresponding path program 1 times [2021-11-22 14:40:04,173 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:40:04,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958095054] [2021-11-22 14:40:04,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:40:04,174 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:40:04,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:40:04,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:40:04,433 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:40:04,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958095054] [2021-11-22 14:40:04,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958095054] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:40:04,434 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:40:04,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-22 14:40:04,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921373084] [2021-11-22 14:40:04,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:40:04,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-22 14:40:04,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:40:04,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-22 14:40:04,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-22 14:40:04,438 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:40:04,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:40:04,679 INFO L93 Difference]: Finished difference Result 109 states and 117 transitions. [2021-11-22 14:40:04,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-22 14:40:04,681 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-22 14:40:04,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:40:04,693 INFO L225 Difference]: With dead ends: 109 [2021-11-22 14:40:04,694 INFO L226 Difference]: Without dead ends: 109 [2021-11-22 14:40:04,695 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-22 14:40:04,698 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 95 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-22 14:40:04,702 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 213 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-22 14:40:04,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-11-22 14:40:04,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 80. [2021-11-22 14:40:04,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 55 states have (on average 1.5636363636363637) internal successors, (86), 74 states have internal predecessors, (86), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-22 14:40:04,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 94 transitions. [2021-11-22 14:40:04,725 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 94 transitions. Word has length 12 [2021-11-22 14:40:04,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:40:04,725 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 94 transitions. [2021-11-22 14:40:04,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:40:04,726 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 94 transitions. [2021-11-22 14:40:04,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-22 14:40:04,727 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:40:04,727 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:40:04,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-22 14:40:04,728 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 14:40:04,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:40:04,729 INFO L85 PathProgramCache]: Analyzing trace with hash -895274815, now seen corresponding path program 1 times [2021-11-22 14:40:04,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:40:04,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239270723] [2021-11-22 14:40:04,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:40:04,730 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:40:04,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:40:04,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-22 14:40:04,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:40:04,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:40:04,817 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:40:04,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239270723] [2021-11-22 14:40:04,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239270723] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:40:04,824 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:40:04,825 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 14:40:04,826 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268805306] [2021-11-22 14:40:04,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:40:04,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 14:40:04,829 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:40:04,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 14:40:04,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-22 14:40:04,831 INFO L87 Difference]: Start difference. First operand 80 states and 94 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-22 14:40:04,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:40:04,932 INFO L93 Difference]: Finished difference Result 77 states and 91 transitions. [2021-11-22 14:40:04,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-22 14:40:04,934 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 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 14 [2021-11-22 14:40:04,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:40:04,935 INFO L225 Difference]: With dead ends: 77 [2021-11-22 14:40:04,937 INFO L226 Difference]: Without dead ends: 77 [2021-11-22 14:40:04,938 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-22 14:40:04,941 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 30 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 14:40:04,943 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 107 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 14:40:04,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-11-22 14:40:04,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2021-11-22 14:40:04,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 55 states have (on average 1.509090909090909) internal successors, (83), 71 states have internal predecessors, (83), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-22 14:40:04,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 91 transitions. [2021-11-22 14:40:04,965 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 91 transitions. Word has length 14 [2021-11-22 14:40:04,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:40:04,966 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 91 transitions. [2021-11-22 14:40:04,968 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-22 14:40:04,969 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 91 transitions. [2021-11-22 14:40:04,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-22 14:40:04,970 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:40:04,970 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:40:04,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-22 14:40:04,971 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 14:40:04,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:40:04,974 INFO L85 PathProgramCache]: Analyzing trace with hash -895274814, now seen corresponding path program 1 times [2021-11-22 14:40:04,974 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:40:04,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977090386] [2021-11-22 14:40:04,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:40:04,980 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:40:05,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:40:05,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-22 14:40:05,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:40:05,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:40:05,203 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:40:05,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977090386] [2021-11-22 14:40:05,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977090386] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:40:05,204 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:40:05,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-22 14:40:05,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811860522] [2021-11-22 14:40:05,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:40:05,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-22 14:40:05,206 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:40:05,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-22 14:40:05,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-22 14:40:05,207 INFO L87 Difference]: Start difference. First operand 77 states and 91 transitions. Second operand has 7 states, 5 states have (on average 2.4) internal successors, (12), 7 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-22 14:40:05,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:40:05,292 INFO L93 Difference]: Finished difference Result 75 states and 89 transitions. [2021-11-22 14:40:05,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-22 14:40:05,293 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 2.4) internal successors, (12), 7 states have internal predecessors, (12), 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 14 [2021-11-22 14:40:05,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:40:05,294 INFO L225 Difference]: With dead ends: 75 [2021-11-22 14:40:05,294 INFO L226 Difference]: Without dead ends: 75 [2021-11-22 14:40:05,295 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-11-22 14:40:05,296 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 49 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 14:40:05,297 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 144 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 14:40:05,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-11-22 14:40:05,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2021-11-22 14:40:05,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 55 states have (on average 1.4727272727272727) internal successors, (81), 69 states have internal predecessors, (81), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-22 14:40:05,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 89 transitions. [2021-11-22 14:40:05,308 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 89 transitions. Word has length 14 [2021-11-22 14:40:05,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:40:05,308 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 89 transitions. [2021-11-22 14:40:05,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 2.4) internal successors, (12), 7 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-22 14:40:05,309 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 89 transitions. [2021-11-22 14:40:05,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-22 14:40:05,310 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:40:05,310 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:40:05,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-22 14:40:05,310 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting checkErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 14:40:05,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:40:05,311 INFO L85 PathProgramCache]: Analyzing trace with hash -1994126428, now seen corresponding path program 1 times [2021-11-22 14:40:05,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:40:05,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801117957] [2021-11-22 14:40:05,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:40:05,313 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:40:05,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:40:05,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:40:05,403 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:40:05,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801117957] [2021-11-22 14:40:05,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801117957] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:40:05,404 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:40:05,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-22 14:40:05,404 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692063682] [2021-11-22 14:40:05,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:40:05,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-22 14:40:05,405 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:40:05,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-22 14:40:05,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-22 14:40:05,407 INFO L87 Difference]: Start difference. First operand 75 states and 89 transitions. Second operand has 6 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:40:05,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:40:05,498 INFO L93 Difference]: Finished difference Result 71 states and 81 transitions. [2021-11-22 14:40:05,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-22 14:40:05,499 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-22 14:40:05,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:40:05,500 INFO L225 Difference]: With dead ends: 71 [2021-11-22 14:40:05,500 INFO L226 Difference]: Without dead ends: 71 [2021-11-22 14:40:05,501 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-22 14:40:05,502 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 75 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 14:40:05,503 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 99 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 14:40:05,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-11-22 14:40:05,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2021-11-22 14:40:05,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 55 states have (on average 1.3272727272727274) internal successors, (73), 65 states have internal predecessors, (73), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-22 14:40:05,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 81 transitions. [2021-11-22 14:40:05,512 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 81 transitions. Word has length 15 [2021-11-22 14:40:05,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:40:05,513 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 81 transitions. [2021-11-22 14:40:05,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:40:05,513 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 81 transitions. [2021-11-22 14:40:05,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-22 14:40:05,514 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:40:05,514 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:40:05,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-22 14:40:05,515 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting checkErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 14:40:05,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:40:05,516 INFO L85 PathProgramCache]: Analyzing trace with hash -1994126427, now seen corresponding path program 1 times [2021-11-22 14:40:05,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:40:05,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497187219] [2021-11-22 14:40:05,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:40:05,517 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:40:05,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:40:05,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:40:05,679 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:40:05,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497187219] [2021-11-22 14:40:05,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497187219] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:40:05,680 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:40:05,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-22 14:40:05,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508224959] [2021-11-22 14:40:05,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:40:05,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-22 14:40:05,682 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:40:05,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-22 14:40:05,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-22 14:40:05,684 INFO L87 Difference]: Start difference. First operand 71 states and 81 transitions. Second operand has 7 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:40:06,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:40:06,004 INFO L93 Difference]: Finished difference Result 91 states and 98 transitions. [2021-11-22 14:40:06,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-22 14:40:06,005 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-22 14:40:06,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:40:06,007 INFO L225 Difference]: With dead ends: 91 [2021-11-22 14:40:06,007 INFO L226 Difference]: Without dead ends: 91 [2021-11-22 14:40:06,007 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-22 14:40:06,009 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 90 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-22 14:40:06,009 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 174 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-22 14:40:06,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-11-22 14:40:06,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 71. [2021-11-22 14:40:06,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 55 states have (on average 1.309090909090909) internal successors, (72), 65 states have internal predecessors, (72), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-22 14:40:06,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 80 transitions. [2021-11-22 14:40:06,019 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 80 transitions. Word has length 15 [2021-11-22 14:40:06,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:40:06,020 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 80 transitions. [2021-11-22 14:40:06,020 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:40:06,020 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 80 transitions. [2021-11-22 14:40:06,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-22 14:40:06,021 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:40:06,021 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:40:06,022 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-22 14:40:06,022 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 14:40:06,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:40:06,023 INFO L85 PathProgramCache]: Analyzing trace with hash -1365638205, now seen corresponding path program 1 times [2021-11-22 14:40:06,023 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:40:06,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359709586] [2021-11-22 14:40:06,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:40:06,024 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:40:06,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:40:06,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-22 14:40:06,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:40:06,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:40:06,186 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:40:06,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359709586] [2021-11-22 14:40:06,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359709586] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:40:06,187 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:40:06,187 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-22 14:40:06,187 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898761164] [2021-11-22 14:40:06,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:40:06,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-22 14:40:06,188 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:40:06,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-22 14:40:06,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-22 14:40:06,189 INFO L87 Difference]: Start difference. First operand 71 states and 80 transitions. Second operand has 9 states, 7 states have (on average 2.0) internal successors, (14), 8 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-22 14:40:06,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:40:06,420 INFO L93 Difference]: Finished difference Result 113 states and 131 transitions. [2021-11-22 14:40:06,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-22 14:40:06,421 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.0) internal successors, (14), 8 states have internal predecessors, (14), 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 16 [2021-11-22 14:40:06,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:40:06,423 INFO L225 Difference]: With dead ends: 113 [2021-11-22 14:40:06,423 INFO L226 Difference]: Without dead ends: 113 [2021-11-22 14:40:06,423 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-11-22 14:40:06,424 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 83 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 14:40:06,425 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 321 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 14:40:06,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-11-22 14:40:06,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 77. [2021-11-22 14:40:06,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 60 states have (on average 1.2833333333333334) internal successors, (77), 70 states have internal predecessors, (77), 4 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-22 14:40:06,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 87 transitions. [2021-11-22 14:40:06,436 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 87 transitions. Word has length 16 [2021-11-22 14:40:06,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:40:06,436 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 87 transitions. [2021-11-22 14:40:06,436 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 2.0) internal successors, (14), 8 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-22 14:40:06,437 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 87 transitions. [2021-11-22 14:40:06,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-22 14:40:06,437 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:40:06,438 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:40:06,438 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-22 14:40:06,438 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting checkErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 14:40:06,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:40:06,439 INFO L85 PathProgramCache]: Analyzing trace with hash -1688377081, now seen corresponding path program 1 times [2021-11-22 14:40:06,439 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:40:06,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025572468] [2021-11-22 14:40:06,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:40:06,439 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:40:06,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:40:06,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:40:06,633 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:40:06,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025572468] [2021-11-22 14:40:06,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025572468] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:40:06,633 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:40:06,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-22 14:40:06,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259433729] [2021-11-22 14:40:06,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:40:06,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-22 14:40:06,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:40:06,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-22 14:40:06,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-22 14:40:06,635 INFO L87 Difference]: Start difference. First operand 77 states and 87 transitions. Second operand has 8 states, 6 states have (on average 2.5) internal successors, (15), 7 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:40:06,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:40:06,931 INFO L93 Difference]: Finished difference Result 94 states and 101 transitions. [2021-11-22 14:40:06,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-22 14:40:06,932 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.5) internal successors, (15), 7 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-11-22 14:40:06,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:40:06,933 INFO L225 Difference]: With dead ends: 94 [2021-11-22 14:40:06,933 INFO L226 Difference]: Without dead ends: 94 [2021-11-22 14:40:06,934 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-11-22 14:40:06,935 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 100 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-22 14:40:06,935 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 209 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-22 14:40:06,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-11-22 14:40:06,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 77. [2021-11-22 14:40:06,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 60 states have (on average 1.2666666666666666) internal successors, (76), 70 states have internal predecessors, (76), 4 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-22 14:40:06,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 86 transitions. [2021-11-22 14:40:06,944 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 86 transitions. Word has length 16 [2021-11-22 14:40:06,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:40:06,944 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 86 transitions. [2021-11-22 14:40:06,944 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.5) internal successors, (15), 7 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:40:06,945 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 86 transitions. [2021-11-22 14:40:06,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-22 14:40:06,946 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:40:06,946 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:40:06,946 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-22 14:40:06,946 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 14:40:06,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:40:06,947 INFO L85 PathProgramCache]: Analyzing trace with hash -1797569124, now seen corresponding path program 1 times [2021-11-22 14:40:06,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:40:06,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305910356] [2021-11-22 14:40:06,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:40:06,948 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:40:06,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:40:07,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-22 14:40:07,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:40:07,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:40:07,096 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:40:07,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305910356] [2021-11-22 14:40:07,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305910356] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:40:07,097 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:40:07,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-22 14:40:07,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781501928] [2021-11-22 14:40:07,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:40:07,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-22 14:40:07,098 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:40:07,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-22 14:40:07,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-11-22 14:40:07,099 INFO L87 Difference]: Start difference. First operand 77 states and 86 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-22 14:40:07,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:40:07,281 INFO L93 Difference]: Finished difference Result 75 states and 84 transitions. [2021-11-22 14:40:07,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-22 14:40:07,282 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 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 19 [2021-11-22 14:40:07,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:40:07,283 INFO L225 Difference]: With dead ends: 75 [2021-11-22 14:40:07,283 INFO L226 Difference]: Without dead ends: 75 [2021-11-22 14:40:07,284 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-11-22 14:40:07,285 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 49 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 14:40:07,285 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 232 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 14:40:07,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-11-22 14:40:07,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2021-11-22 14:40:07,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 59 states have (on average 1.2542372881355932) internal successors, (74), 68 states have internal predecessors, (74), 4 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-22 14:40:07,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 84 transitions. [2021-11-22 14:40:07,293 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 84 transitions. Word has length 19 [2021-11-22 14:40:07,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:40:07,293 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 84 transitions. [2021-11-22 14:40:07,293 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-22 14:40:07,294 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 84 transitions. [2021-11-22 14:40:07,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-22 14:40:07,295 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:40:07,295 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:40:07,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-22 14:40:07,296 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 14:40:07,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:40:07,297 INFO L85 PathProgramCache]: Analyzing trace with hash -886949954, now seen corresponding path program 1 times [2021-11-22 14:40:07,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:40:07,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182787549] [2021-11-22 14:40:07,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:40:07,298 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:40:07,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:40:07,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-22 14:40:07,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:40:07,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:40:07,347 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:40:07,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182787549] [2021-11-22 14:40:07,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182787549] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:40:07,348 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:40:07,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 14:40:07,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672712290] [2021-11-22 14:40:07,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:40:07,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 14:40:07,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:40:07,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 14:40:07,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-22 14:40:07,350 INFO L87 Difference]: Start difference. First operand 75 states and 84 transitions. Second operand has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-22 14:40:07,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:40:07,378 INFO L93 Difference]: Finished difference Result 74 states and 83 transitions. [2021-11-22 14:40:07,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-22 14:40:07,379 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 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 21 [2021-11-22 14:40:07,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:40:07,380 INFO L225 Difference]: With dead ends: 74 [2021-11-22 14:40:07,380 INFO L226 Difference]: Without dead ends: 74 [2021-11-22 14:40:07,381 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-22 14:40:07,382 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 17 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 14:40:07,382 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 108 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 14:40:07,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-11-22 14:40:07,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2021-11-22 14:40:07,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 59 states have (on average 1.2372881355932204) internal successors, (73), 67 states have internal predecessors, (73), 4 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-22 14:40:07,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 83 transitions. [2021-11-22 14:40:07,389 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 83 transitions. Word has length 21 [2021-11-22 14:40:07,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:40:07,390 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 83 transitions. [2021-11-22 14:40:07,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-22 14:40:07,391 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 83 transitions. [2021-11-22 14:40:07,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-22 14:40:07,392 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:40:07,392 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:40:07,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-22 14:40:07,393 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting checkErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 14:40:07,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:40:07,394 INFO L85 PathProgramCache]: Analyzing trace with hash -510588444, now seen corresponding path program 1 times [2021-11-22 14:40:07,394 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:40:07,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21223771] [2021-11-22 14:40:07,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:40:07,395 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:40:07,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:40:07,541 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:40:07,541 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:40:07,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21223771] [2021-11-22 14:40:07,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21223771] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:40:07,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361017242] [2021-11-22 14:40:07,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:40:07,542 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:40:07,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_691190e7-8c70-4734-961f-7afe1496c1fb/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:40:07,544 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_691190e7-8c70-4734-961f-7afe1496c1fb/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:40:07,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_691190e7-8c70-4734-961f-7afe1496c1fb/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-22 14:40:07,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:40:07,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-22 14:40:07,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:40:07,998 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:40:07,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:40:08,528 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:40:08,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361017242] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:40:08,529 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 14:40:08,529 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2021-11-22 14:40:08,529 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923281993] [2021-11-22 14:40:08,530 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 14:40:08,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-22 14:40:08,530 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:40:08,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-22 14:40:08,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-11-22 14:40:08,531 INFO L87 Difference]: Start difference. First operand 74 states and 83 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 8 states have internal predecessors, (41), 3 states have call successors, (5), 4 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:40:08,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:40:08,825 INFO L93 Difference]: Finished difference Result 91 states and 99 transitions. [2021-11-22 14:40:08,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-22 14:40:08,826 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 8 states have internal predecessors, (41), 3 states have call successors, (5), 4 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-11-22 14:40:08,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:40:08,827 INFO L225 Difference]: With dead ends: 91 [2021-11-22 14:40:08,827 INFO L226 Difference]: Without dead ends: 91 [2021-11-22 14:40:08,828 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=122, Invalid=298, Unknown=0, NotChecked=0, Total=420 [2021-11-22 14:40:08,829 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 236 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-22 14:40:08,829 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [236 Valid, 271 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-22 14:40:08,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-11-22 14:40:08,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 72. [2021-11-22 14:40:08,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 58 states have (on average 1.2241379310344827) internal successors, (71), 65 states have internal predecessors, (71), 4 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-22 14:40:08,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 81 transitions. [2021-11-22 14:40:08,835 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 81 transitions. Word has length 22 [2021-11-22 14:40:08,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:40:08,836 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 81 transitions. [2021-11-22 14:40:08,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 8 states have internal predecessors, (41), 3 states have call successors, (5), 4 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:40:08,836 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 81 transitions. [2021-11-22 14:40:08,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-22 14:40:08,837 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:40:08,837 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:40:08,884 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_691190e7-8c70-4734-961f-7afe1496c1fb/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-22 14:40:09,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_691190e7-8c70-4734-961f-7afe1496c1fb/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:40:09,056 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 14:40:09,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:40:09,057 INFO L85 PathProgramCache]: Analyzing trace with hash -1955378847, now seen corresponding path program 1 times [2021-11-22 14:40:09,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:40:09,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249273211] [2021-11-22 14:40:09,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:40:09,058 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:40:09,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:40:09,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-22 14:40:09,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:40:09,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:40:09,193 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:40:09,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249273211] [2021-11-22 14:40:09,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249273211] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:40:09,193 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:40:09,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-22 14:40:09,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699215459] [2021-11-22 14:40:09,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:40:09,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-22 14:40:09,195 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:40:09,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-22 14:40:09,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-22 14:40:09,196 INFO L87 Difference]: Start difference. First operand 72 states and 81 transitions. Second operand has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-22 14:40:09,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:40:09,269 INFO L93 Difference]: Finished difference Result 71 states and 80 transitions. [2021-11-22 14:40:09,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-22 14:40:09,270 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 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 23 [2021-11-22 14:40:09,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:40:09,272 INFO L225 Difference]: With dead ends: 71 [2021-11-22 14:40:09,272 INFO L226 Difference]: Without dead ends: 60 [2021-11-22 14:40:09,273 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-22 14:40:09,274 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 12 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 14:40:09,274 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 121 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 14:40:09,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-11-22 14:40:09,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-11-22 14:40:09,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 47 states have (on average 1.2553191489361701) internal successors, (59), 54 states have internal predecessors, (59), 4 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2021-11-22 14:40:09,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 68 transitions. [2021-11-22 14:40:09,283 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 68 transitions. Word has length 23 [2021-11-22 14:40:09,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:40:09,283 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 68 transitions. [2021-11-22 14:40:09,283 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-22 14:40:09,283 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 68 transitions. [2021-11-22 14:40:09,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-22 14:40:09,286 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:40:09,286 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:40:09,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-22 14:40:09,287 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting checkErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 14:40:09,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:40:09,287 INFO L85 PathProgramCache]: Analyzing trace with hash -1048757111, now seen corresponding path program 1 times [2021-11-22 14:40:09,287 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:40:09,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742868023] [2021-11-22 14:40:09,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:40:09,288 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:40:09,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:40:09,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-22 14:40:09,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:40:09,527 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:40:09,528 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:40:09,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742868023] [2021-11-22 14:40:09,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742868023] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:40:09,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141591173] [2021-11-22 14:40:09,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:40:09,529 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:40:09,529 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_691190e7-8c70-4734-961f-7afe1496c1fb/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:40:09,530 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_691190e7-8c70-4734-961f-7afe1496c1fb/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:40:09,560 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_691190e7-8c70-4734-961f-7afe1496c1fb/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-22 14:40:09,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:40:09,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-22 14:40:09,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:40:10,122 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:40:10,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:40:10,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2021-11-22 14:40:10,696 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:40:10,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141591173] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:40:10,696 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 14:40:10,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 8] total 23 [2021-11-22 14:40:10,697 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051614062] [2021-11-22 14:40:10,697 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 14:40:10,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-22 14:40:10,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:40:10,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-22 14:40:10,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2021-11-22 14:40:10,713 INFO L87 Difference]: Start difference. First operand 60 states and 68 transitions. Second operand has 24 states, 21 states have (on average 2.380952380952381) internal successors, (50), 21 states have internal predecessors, (50), 5 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-22 14:40:11,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:40:11,358 INFO L93 Difference]: Finished difference Result 140 states and 162 transitions. [2021-11-22 14:40:11,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-22 14:40:11,360 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 21 states have (on average 2.380952380952381) internal successors, (50), 21 states have internal predecessors, (50), 5 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 24 [2021-11-22 14:40:11,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:40:11,361 INFO L225 Difference]: With dead ends: 140 [2021-11-22 14:40:11,361 INFO L226 Difference]: Without dead ends: 138 [2021-11-22 14:40:11,362 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=168, Invalid=824, Unknown=0, NotChecked=0, Total=992 [2021-11-22 14:40:11,363 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 209 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-22 14:40:11,365 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 370 Invalid, 360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 290 Invalid, 0 Unknown, 52 Unchecked, 0.3s Time] [2021-11-22 14:40:11,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-11-22 14:40:11,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 110. [2021-11-22 14:40:11,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 88 states have (on average 1.2613636363636365) internal successors, (111), 98 states have internal predecessors, (111), 8 states have call successors, (8), 6 states have call predecessors, (8), 8 states have return successors, (13), 5 states have call predecessors, (13), 8 states have call successors, (13) [2021-11-22 14:40:11,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 132 transitions. [2021-11-22 14:40:11,379 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 132 transitions. Word has length 24 [2021-11-22 14:40:11,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:40:11,381 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 132 transitions. [2021-11-22 14:40:11,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 21 states have (on average 2.380952380952381) internal successors, (50), 21 states have internal predecessors, (50), 5 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-22 14:40:11,381 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 132 transitions. [2021-11-22 14:40:11,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-22 14:40:11,393 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:40:11,394 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:40:11,439 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_691190e7-8c70-4734-961f-7afe1496c1fb/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-22 14:40:11,620 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_691190e7-8c70-4734-961f-7afe1496c1fb/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:40:11,620 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting checkErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 14:40:11,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:40:11,620 INFO L85 PathProgramCache]: Analyzing trace with hash 1837735872, now seen corresponding path program 1 times [2021-11-22 14:40:11,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:40:11,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088440217] [2021-11-22 14:40:11,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:40:11,621 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:40:11,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:40:11,799 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:40:11,799 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:40:11,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088440217] [2021-11-22 14:40:11,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088440217] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:40:11,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914957104] [2021-11-22 14:40:11,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:40:11,800 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:40:11,800 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_691190e7-8c70-4734-961f-7afe1496c1fb/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:40:11,801 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_691190e7-8c70-4734-961f-7afe1496c1fb/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:40:11,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_691190e7-8c70-4734-961f-7afe1496c1fb/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-22 14:40:11,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:40:11,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-22 14:40:11,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:40:11,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-22 14:40:12,464 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:40:12,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:40:13,273 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:40:13,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914957104] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:40:13,273 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 14:40:13,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 24 [2021-11-22 14:40:13,274 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322789393] [2021-11-22 14:40:13,274 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 14:40:13,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-22 14:40:13,274 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:40:13,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-22 14:40:13,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-11-22 14:40:13,276 INFO L87 Difference]: Start difference. First operand 110 states and 132 transitions. Second operand has 25 states, 20 states have (on average 2.95) internal successors, (59), 19 states have internal predecessors, (59), 6 states have call successors, (6), 6 states have call predecessors, (6), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:40:14,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:40:14,209 INFO L93 Difference]: Finished difference Result 160 states and 190 transitions. [2021-11-22 14:40:14,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-22 14:40:14,209 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 20 states have (on average 2.95) internal successors, (59), 19 states have internal predecessors, (59), 6 states have call successors, (6), 6 states have call predecessors, (6), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-11-22 14:40:14,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:40:14,211 INFO L225 Difference]: With dead ends: 160 [2021-11-22 14:40:14,211 INFO L226 Difference]: Without dead ends: 160 [2021-11-22 14:40:14,212 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=184, Invalid=872, Unknown=0, NotChecked=0, Total=1056 [2021-11-22 14:40:14,213 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 354 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 509 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 354 SdHoareTripleChecker+Valid, 394 SdHoareTripleChecker+Invalid, 574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-22 14:40:14,213 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [354 Valid, 394 Invalid, 574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 509 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-22 14:40:14,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-11-22 14:40:14,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 109. [2021-11-22 14:40:14,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 88 states have (on average 1.2386363636363635) internal successors, (109), 97 states have internal predecessors, (109), 8 states have call successors, (8), 6 states have call predecessors, (8), 8 states have return successors, (13), 5 states have call predecessors, (13), 8 states have call successors, (13) [2021-11-22 14:40:14,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 130 transitions. [2021-11-22 14:40:14,228 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 130 transitions. Word has length 25 [2021-11-22 14:40:14,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:40:14,229 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 130 transitions. [2021-11-22 14:40:14,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 20 states have (on average 2.95) internal successors, (59), 19 states have internal predecessors, (59), 6 states have call successors, (6), 6 states have call predecessors, (6), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:40:14,229 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 130 transitions. [2021-11-22 14:40:14,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-22 14:40:14,232 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:40:14,232 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:40:14,276 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_691190e7-8c70-4734-961f-7afe1496c1fb/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-22 14:40:14,460 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_691190e7-8c70-4734-961f-7afe1496c1fb/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:40:14,460 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting checkErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 14:40:14,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:40:14,461 INFO L85 PathProgramCache]: Analyzing trace with hash 1461731722, now seen corresponding path program 1 times [2021-11-22 14:40:14,461 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:40:14,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880757717] [2021-11-22 14:40:14,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:40:14,461 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:40:14,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:40:14,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-22 14:40:14,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:40:14,731 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:40:14,731 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:40:14,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880757717] [2021-11-22 14:40:14,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880757717] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:40:14,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014561962] [2021-11-22 14:40:14,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:40:14,732 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:40:14,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_691190e7-8c70-4734-961f-7afe1496c1fb/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:40:14,736 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_691190e7-8c70-4734-961f-7afe1496c1fb/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:40:14,756 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_691190e7-8c70-4734-961f-7afe1496c1fb/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-22 14:40:14,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:40:14,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-22 14:40:14,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:40:15,400 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:40:15,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:40:15,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2021-11-22 14:40:16,106 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:40:16,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2014561962] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:40:16,107 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 14:40:16,107 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 12] total 35 [2021-11-22 14:40:16,107 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761235565] [2021-11-22 14:40:16,107 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 14:40:16,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-22 14:40:16,109 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:40:16,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-22 14:40:16,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=1133, Unknown=0, NotChecked=0, Total=1260 [2021-11-22 14:40:16,111 INFO L87 Difference]: Start difference. First operand 109 states and 130 transitions. Second operand has 36 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 29 states have internal predecessors, (59), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-22 14:40:18,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:40:18,116 INFO L93 Difference]: Finished difference Result 281 states and 336 transitions. [2021-11-22 14:40:18,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-22 14:40:18,117 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 29 states have internal predecessors, (59), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 26 [2021-11-22 14:40:18,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:40:18,127 INFO L225 Difference]: With dead ends: 281 [2021-11-22 14:40:18,128 INFO L226 Difference]: Without dead ends: 281 [2021-11-22 14:40:18,131 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 787 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=468, Invalid=3314, Unknown=0, NotChecked=0, Total=3782 [2021-11-22 14:40:18,132 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 503 mSDsluCounter, 646 mSDsCounter, 0 mSdLazyCounter, 823 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 508 SdHoareTripleChecker+Valid, 684 SdHoareTripleChecker+Invalid, 1098 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 823 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 184 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-22 14:40:18,132 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [508 Valid, 684 Invalid, 1098 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 823 Invalid, 0 Unknown, 184 Unchecked, 0.7s Time] [2021-11-22 14:40:18,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-11-22 14:40:18,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 155. [2021-11-22 14:40:18,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 127 states have (on average 1.236220472440945) internal successors, (157), 137 states have internal predecessors, (157), 11 states have call successors, (11), 7 states have call predecessors, (11), 12 states have return successors, (27), 10 states have call predecessors, (27), 11 states have call successors, (27) [2021-11-22 14:40:18,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 195 transitions. [2021-11-22 14:40:18,149 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 195 transitions. Word has length 26 [2021-11-22 14:40:18,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:40:18,149 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 195 transitions. [2021-11-22 14:40:18,150 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 29 states have internal predecessors, (59), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-22 14:40:18,150 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 195 transitions. [2021-11-22 14:40:18,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-22 14:40:18,150 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:40:18,151 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:40:18,192 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_691190e7-8c70-4734-961f-7afe1496c1fb/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-22 14:40:18,366 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_691190e7-8c70-4734-961f-7afe1496c1fb/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-22 14:40:18,367 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting checkErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 14:40:18,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:40:18,367 INFO L85 PathProgramCache]: Analyzing trace with hash 1135237196, now seen corresponding path program 1 times [2021-11-22 14:40:18,367 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:40:18,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538260971] [2021-11-22 14:40:18,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:40:18,368 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:40:18,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:40:18,530 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:40:18,530 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:40:18,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538260971] [2021-11-22 14:40:18,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538260971] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:40:18,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422261750] [2021-11-22 14:40:18,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:40:18,531 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:40:18,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_691190e7-8c70-4734-961f-7afe1496c1fb/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:40:18,532 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_691190e7-8c70-4734-961f-7afe1496c1fb/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:40:18,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_691190e7-8c70-4734-961f-7afe1496c1fb/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-22 14:40:18,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:40:18,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-22 14:40:18,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:40:18,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-22 14:40:19,125 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:40:19,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:40:19,964 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:40:19,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1422261750] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:40:19,964 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 14:40:19,964 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 24 [2021-11-22 14:40:19,964 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331726434] [2021-11-22 14:40:19,965 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 14:40:19,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-22 14:40:19,965 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:40:19,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-22 14:40:19,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-11-22 14:40:19,966 INFO L87 Difference]: Start difference. First operand 155 states and 195 transitions. Second operand has 25 states, 20 states have (on average 3.1) internal successors, (62), 19 states have internal predecessors, (62), 6 states have call successors, (6), 6 states have call predecessors, (6), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:40:20,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:40:20,722 INFO L93 Difference]: Finished difference Result 232 states and 288 transitions. [2021-11-22 14:40:20,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-22 14:40:20,723 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 20 states have (on average 3.1) internal successors, (62), 19 states have internal predecessors, (62), 6 states have call successors, (6), 6 states have call predecessors, (6), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-11-22 14:40:20,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:40:20,725 INFO L225 Difference]: With dead ends: 232 [2021-11-22 14:40:20,725 INFO L226 Difference]: Without dead ends: 232 [2021-11-22 14:40:20,726 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=185, Invalid=871, Unknown=0, NotChecked=0, Total=1056 [2021-11-22 14:40:20,727 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 318 mSDsluCounter, 390 mSDsCounter, 0 mSdLazyCounter, 511 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 318 SdHoareTripleChecker+Valid, 441 SdHoareTripleChecker+Invalid, 583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-22 14:40:20,727 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [318 Valid, 441 Invalid, 583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 511 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-22 14:40:20,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-11-22 14:40:20,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 154. [2021-11-22 14:40:20,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 127 states have (on average 1.2125984251968505) internal successors, (154), 136 states have internal predecessors, (154), 11 states have call successors, (11), 7 states have call predecessors, (11), 12 states have return successors, (27), 10 states have call predecessors, (27), 11 states have call successors, (27) [2021-11-22 14:40:20,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 192 transitions. [2021-11-22 14:40:20,739 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 192 transitions. Word has length 26 [2021-11-22 14:40:20,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:40:20,740 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 192 transitions. [2021-11-22 14:40:20,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 20 states have (on average 3.1) internal successors, (62), 19 states have internal predecessors, (62), 6 states have call successors, (6), 6 states have call predecessors, (6), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:40:20,740 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 192 transitions. [2021-11-22 14:40:20,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-22 14:40:20,741 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:40:20,741 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:40:20,785 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_691190e7-8c70-4734-961f-7afe1496c1fb/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-22 14:40:20,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_691190e7-8c70-4734-961f-7afe1496c1fb/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-22 14:40:20,956 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting checkErr9ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 14:40:20,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:40:20,957 INFO L85 PathProgramCache]: Analyzing trace with hash -223654157, now seen corresponding path program 1 times [2021-11-22 14:40:20,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:40:20,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178864401] [2021-11-22 14:40:20,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:40:20,957 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:40:20,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:40:21,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-22 14:40:21,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:40:21,105 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:40:21,105 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:40:21,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178864401] [2021-11-22 14:40:21,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178864401] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:40:21,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771684262] [2021-11-22 14:40:21,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:40:21,106 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:40:21,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_691190e7-8c70-4734-961f-7afe1496c1fb/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:40:21,107 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_691190e7-8c70-4734-961f-7afe1496c1fb/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:40:21,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_691190e7-8c70-4734-961f-7afe1496c1fb/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-22 14:40:21,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:40:21,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-22 14:40:21,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:40:21,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2021-11-22 14:40:23,249 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_check_~a#1.base_BEFORE_CALL_7| Int)) (= ((as const (Array Int Int)) 0) (select |c_#memory_int| |v_check_~a#1.base_BEFORE_CALL_7|))) is different from true [2021-11-22 14:40:23,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-11-22 14:40:23,456 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2021-11-22 14:40:23,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:40:26,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771684262] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:40:26,035 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-22 14:40:26,035 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-11-22 14:40:26,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561526630] [2021-11-22 14:40:26,036 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-22 14:40:26,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-22 14:40:26,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:40:26,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-22 14:40:26,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=293, Unknown=2, NotChecked=34, Total=380 [2021-11-22 14:40:26,037 INFO L87 Difference]: Start difference. First operand 154 states and 192 transitions. Second operand has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-22 14:40:26,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:40:26,330 INFO L93 Difference]: Finished difference Result 152 states and 185 transitions. [2021-11-22 14:40:26,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-22 14:40:26,341 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 29 [2021-11-22 14:40:26,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:40:26,343 INFO L225 Difference]: With dead ends: 152 [2021-11-22 14:40:26,343 INFO L226 Difference]: Without dead ends: 152 [2021-11-22 14:40:26,344 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=123, Invalid=529, Unknown=2, NotChecked=48, Total=702 [2021-11-22 14:40:26,345 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 79 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 72 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 14:40:26,345 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 187 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 140 Invalid, 0 Unknown, 72 Unchecked, 0.1s Time] [2021-11-22 14:40:26,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-11-22 14:40:26,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2021-11-22 14:40:26,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 126 states have (on average 1.1666666666666667) internal successors, (147), 134 states have internal predecessors, (147), 11 states have call successors, (11), 7 states have call predecessors, (11), 12 states have return successors, (27), 10 states have call predecessors, (27), 11 states have call successors, (27) [2021-11-22 14:40:26,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 185 transitions. [2021-11-22 14:40:26,354 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 185 transitions. Word has length 29 [2021-11-22 14:40:26,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:40:26,355 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 185 transitions. [2021-11-22 14:40:26,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-22 14:40:26,355 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 185 transitions. [2021-11-22 14:40:26,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-22 14:40:26,356 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:40:26,356 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:40:26,400 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_691190e7-8c70-4734-961f-7afe1496c1fb/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-22 14:40:26,572 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_691190e7-8c70-4734-961f-7afe1496c1fb/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-22 14:40:26,572 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting checkErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 14:40:26,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:40:26,573 INFO L85 PathProgramCache]: Analyzing trace with hash -1056908532, now seen corresponding path program 1 times [2021-11-22 14:40:26,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:40:26,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090187112] [2021-11-22 14:40:26,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:40:26,573 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:40:26,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:40:26,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-22 14:40:26,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:40:26,699 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 14:40:26,699 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:40:26,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090187112] [2021-11-22 14:40:26,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090187112] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:40:26,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871835157] [2021-11-22 14:40:26,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:40:26,700 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:40:26,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_691190e7-8c70-4734-961f-7afe1496c1fb/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:40:26,701 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_691190e7-8c70-4734-961f-7afe1496c1fb/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:40:26,702 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_691190e7-8c70-4734-961f-7afe1496c1fb/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-22 14:40:26,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:40:26,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-22 14:40:26,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:40:26,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2021-11-22 14:40:26,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-11-22 14:40:26,896 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-22 14:40:26,896 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-22 14:40:26,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871835157] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:40:26,900 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-22 14:40:26,900 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 11 [2021-11-22 14:40:26,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794675632] [2021-11-22 14:40:26,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:40:26,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-22 14:40:26,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:40:26,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-22 14:40:26,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-11-22 14:40:26,903 INFO L87 Difference]: Start difference. First operand 152 states and 185 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-22 14:40:26,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:40:26,983 INFO L93 Difference]: Finished difference Result 121 states and 143 transitions. [2021-11-22 14:40:26,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-22 14:40:26,983 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2021-11-22 14:40:26,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:40:26,985 INFO L225 Difference]: With dead ends: 121 [2021-11-22 14:40:26,985 INFO L226 Difference]: Without dead ends: 121 [2021-11-22 14:40:26,985 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-11-22 14:40:26,986 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 17 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 10 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 14:40:26,987 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 145 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 44 Invalid, 0 Unknown, 10 Unchecked, 0.0s Time] [2021-11-22 14:40:26,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-11-22 14:40:26,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2021-11-22 14:40:26,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 101 states have (on average 1.1386138613861385) internal successors, (115), 107 states have internal predecessors, (115), 8 states have call successors, (8), 5 states have call predecessors, (8), 9 states have return successors, (20), 8 states have call predecessors, (20), 8 states have call successors, (20) [2021-11-22 14:40:26,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 143 transitions. [2021-11-22 14:40:26,994 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 143 transitions. Word has length 34 [2021-11-22 14:40:26,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:40:26,995 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 143 transitions. [2021-11-22 14:40:26,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-22 14:40:26,995 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 143 transitions. [2021-11-22 14:40:26,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-22 14:40:26,996 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:40:26,996 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:40:27,035 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_691190e7-8c70-4734-961f-7afe1496c1fb/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-22 14:40:27,220 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_691190e7-8c70-4734-961f-7afe1496c1fb/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-22 14:40:27,220 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 14:40:27,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:40:27,220 INFO L85 PathProgramCache]: Analyzing trace with hash -1152234182, now seen corresponding path program 1 times [2021-11-22 14:40:27,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:40:27,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137453156] [2021-11-22 14:40:27,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:40:27,221 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:40:27,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:40:27,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-22 14:40:27,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:40:27,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-22 14:40:27,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:40:27,598 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 14:40:27,598 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:40:27,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137453156] [2021-11-22 14:40:27,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137453156] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:40:27,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153287075] [2021-11-22 14:40:27,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:40:27,599 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:40:27,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_691190e7-8c70-4734-961f-7afe1496c1fb/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:40:27,606 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_691190e7-8c70-4734-961f-7afe1496c1fb/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:40:27,644 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_691190e7-8c70-4734-961f-7afe1496c1fb/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-22 14:40:27,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:40:27,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-22 14:40:27,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:40:27,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-22 14:40:28,738 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 14:40:28,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:40:31,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153287075] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:40:31,358 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-22 14:40:31,358 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-11-22 14:40:31,358 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075583233] [2021-11-22 14:40:31,358 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-22 14:40:31,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-22 14:40:31,359 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:40:31,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-22 14:40:31,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=902, Unknown=0, NotChecked=0, Total=992 [2021-11-22 14:40:31,360 INFO L87 Difference]: Start difference. First operand 121 states and 143 transitions. Second operand has 25 states, 21 states have (on average 2.619047619047619) internal successors, (55), 20 states have internal predecessors, (55), 3 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-22 14:40:31,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:40:31,640 INFO L93 Difference]: Finished difference Result 151 states and 177 transitions. [2021-11-22 14:40:31,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-22 14:40:31,641 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 21 states have (on average 2.619047619047619) internal successors, (55), 20 states have internal predecessors, (55), 3 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 35 [2021-11-22 14:40:31,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:40:31,642 INFO L225 Difference]: With dead ends: 151 [2021-11-22 14:40:31,642 INFO L226 Difference]: Without dead ends: 138 [2021-11-22 14:40:31,643 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=120, Invalid=1212, Unknown=0, NotChecked=0, Total=1332 [2021-11-22 14:40:31,643 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 19 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 14:40:31,644 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 236 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 83 Invalid, 0 Unknown, 52 Unchecked, 0.1s Time] [2021-11-22 14:40:31,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-11-22 14:40:31,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 117. [2021-11-22 14:40:31,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 97 states have (on average 1.1443298969072164) internal successors, (111), 104 states have internal predecessors, (111), 8 states have call successors, (8), 5 states have call predecessors, (8), 9 states have return successors, (19), 7 states have call predecessors, (19), 8 states have call successors, (19) [2021-11-22 14:40:31,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 138 transitions. [2021-11-22 14:40:31,652 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 138 transitions. Word has length 35 [2021-11-22 14:40:31,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:40:31,652 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 138 transitions. [2021-11-22 14:40:31,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 21 states have (on average 2.619047619047619) internal successors, (55), 20 states have internal predecessors, (55), 3 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-22 14:40:31,653 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 138 transitions. [2021-11-22 14:40:31,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-22 14:40:31,654 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:40:31,654 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:40:31,704 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_691190e7-8c70-4734-961f-7afe1496c1fb/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-22 14:40:31,880 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_691190e7-8c70-4734-961f-7afe1496c1fb/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:40:31,880 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting checkErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 14:40:31,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:40:31,880 INFO L85 PathProgramCache]: Analyzing trace with hash -293838063, now seen corresponding path program 2 times [2021-11-22 14:40:31,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:40:31,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794277407] [2021-11-22 14:40:31,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:40:31,881 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:40:31,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:40:32,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-22 14:40:32,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:40:32,036 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-22 14:40:32,036 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:40:32,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794277407] [2021-11-22 14:40:32,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794277407] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:40:32,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184765615] [2021-11-22 14:40:32,037 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-22 14:40:32,037 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:40:32,038 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_691190e7-8c70-4734-961f-7afe1496c1fb/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:40:32,039 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_691190e7-8c70-4734-961f-7afe1496c1fb/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:40:32,064 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_691190e7-8c70-4734-961f-7afe1496c1fb/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-22 14:40:32,134 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-22 14:40:32,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 14:40:32,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-22 14:40:32,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:40:32,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2021-11-22 14:40:32,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-11-22 14:40:32,301 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 25 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-22 14:40:32,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:40:46,615 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-22 14:40:46,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184765615] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:40:46,615 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 14:40:46,616 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 17 [2021-11-22 14:40:46,616 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264270688] [2021-11-22 14:40:46,616 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 14:40:46,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-22 14:40:46,617 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:40:46,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-22 14:40:46,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=223, Unknown=6, NotChecked=0, Total=272 [2021-11-22 14:40:46,618 INFO L87 Difference]: Start difference. First operand 117 states and 138 transitions. Second operand has 17 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 15 states have internal predecessors, (58), 5 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-22 14:40:46,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:40:46,738 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions. [2021-11-22 14:40:46,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-22 14:40:46,739 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 15 states have internal predecessors, (58), 5 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 44 [2021-11-22 14:40:46,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:40:46,740 INFO L225 Difference]: With dead ends: 58 [2021-11-22 14:40:46,740 INFO L226 Difference]: Without dead ends: 58 [2021-11-22 14:40:46,740 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 14.3s TimeCoverageRelationStatistics Valid=82, Invalid=332, Unknown=6, NotChecked=0, Total=420 [2021-11-22 14:40:46,741 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 52 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 83 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 14:40:46,742 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 182 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 61 Invalid, 0 Unknown, 83 Unchecked, 0.1s Time] [2021-11-22 14:40:46,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-11-22 14:40:46,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-11-22 14:40:46,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 50 states have (on average 1.06) internal successors, (53), 51 states have internal predecessors, (53), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-22 14:40:46,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2021-11-22 14:40:46,746 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 44 [2021-11-22 14:40:46,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:40:46,746 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2021-11-22 14:40:46,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 15 states have internal predecessors, (58), 5 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-22 14:40:46,747 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2021-11-22 14:40:46,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-22 14:40:46,747 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:40:46,748 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:40:46,785 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_691190e7-8c70-4734-961f-7afe1496c1fb/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-22 14:40:46,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_691190e7-8c70-4734-961f-7afe1496c1fb/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:40:46,964 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting checkErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 14:40:46,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:40:46,964 INFO L85 PathProgramCache]: Analyzing trace with hash 1031869527, now seen corresponding path program 1 times [2021-11-22 14:40:46,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:40:46,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054160204] [2021-11-22 14:40:46,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:40:46,965 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:40:46,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:40:47,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-22 14:40:47,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:40:47,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-22 14:40:47,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:40:47,335 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-22 14:40:47,336 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:40:47,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054160204] [2021-11-22 14:40:47,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054160204] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:40:47,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892183680] [2021-11-22 14:40:47,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:40:47,336 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:40:47,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_691190e7-8c70-4734-961f-7afe1496c1fb/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:40:47,344 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_691190e7-8c70-4734-961f-7afe1496c1fb/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:40:47,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_691190e7-8c70-4734-961f-7afe1496c1fb/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-22 14:40:47,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:40:47,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-22 14:40:47,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:40:48,059 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 14:40:48,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:40:52,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892183680] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:40:52,198 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-22 14:40:52,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 29 [2021-11-22 14:40:52,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823967738] [2021-11-22 14:40:52,199 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-22 14:40:52,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-22 14:40:52,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:40:52,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-22 14:40:52,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1227, Unknown=0, NotChecked=0, Total=1332 [2021-11-22 14:40:52,201 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand has 30 states, 23 states have (on average 2.869565217391304) internal successors, (66), 25 states have internal predecessors, (66), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-22 14:40:53,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:40:53,563 INFO L93 Difference]: Finished difference Result 62 states and 64 transitions. [2021-11-22 14:40:53,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-22 14:40:53,564 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 23 states have (on average 2.869565217391304) internal successors, (66), 25 states have internal predecessors, (66), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) Word has length 45 [2021-11-22 14:40:53,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:40:53,565 INFO L225 Difference]: With dead ends: 62 [2021-11-22 14:40:53,565 INFO L226 Difference]: Without dead ends: 62 [2021-11-22 14:40:53,566 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 467 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=404, Invalid=2676, Unknown=0, NotChecked=0, Total=3080 [2021-11-22 14:40:53,567 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 168 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 440 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-22 14:40:53,568 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 362 Invalid, 484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 440 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-22 14:40:53,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-11-22 14:40:53,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 53. [2021-11-22 14:40:53,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 46 states have (on average 1.0217391304347827) internal successors, (47), 47 states have internal predecessors, (47), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-22 14:40:53,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2021-11-22 14:40:53,571 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 45 [2021-11-22 14:40:53,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:40:53,575 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2021-11-22 14:40:53,575 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 23 states have (on average 2.869565217391304) internal successors, (66), 25 states have internal predecessors, (66), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-22 14:40:53,576 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2021-11-22 14:40:53,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-22 14:40:53,576 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:40:53,577 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:40:53,621 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_691190e7-8c70-4734-961f-7afe1496c1fb/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-22 14:40:53,788 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_691190e7-8c70-4734-961f-7afe1496c1fb/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-11-22 14:40:53,788 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 14:40:53,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:40:53,788 INFO L85 PathProgramCache]: Analyzing trace with hash -561164019, now seen corresponding path program 2 times [2021-11-22 14:40:53,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:40:53,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746980942] [2021-11-22 14:40:53,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:40:53,789 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:40:53,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:40:53,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-22 14:40:53,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:40:54,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-22 14:40:54,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:40:54,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-22 14:40:54,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:40:54,343 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-22 14:40:54,343 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:40:54,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746980942] [2021-11-22 14:40:54,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746980942] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:40:54,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239746658] [2021-11-22 14:40:54,344 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-22 14:40:54,344 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:40:54,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_691190e7-8c70-4734-961f-7afe1496c1fb/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:40:54,348 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_691190e7-8c70-4734-961f-7afe1496c1fb/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:40:54,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_691190e7-8c70-4734-961f-7afe1496c1fb/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-22 14:40:54,442 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-22 14:40:54,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 14:40:54,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 42 conjunts are in the unsatisfiable core [2021-11-22 14:40:54,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:40:54,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-22 14:40:57,385 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-22 14:40:57,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:41:01,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [239746658] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:41:01,538 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-22 14:41:01,538 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 33 [2021-11-22 14:41:01,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678988286] [2021-11-22 14:41:01,538 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-22 14:41:01,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-22 14:41:01,539 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:41:01,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-22 14:41:01,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1510, Unknown=2, NotChecked=0, Total=1640 [2021-11-22 14:41:01,540 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand has 34 states, 28 states have (on average 3.142857142857143) internal successors, (88), 27 states have internal predecessors, (88), 5 states have call successors, (6), 2 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-22 14:41:01,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:41:01,808 INFO L93 Difference]: Finished difference Result 61 states and 63 transitions. [2021-11-22 14:41:01,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-22 14:41:01,811 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 28 states have (on average 3.142857142857143) internal successors, (88), 27 states have internal predecessors, (88), 5 states have call successors, (6), 2 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 54 [2021-11-22 14:41:01,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:41:01,812 INFO L225 Difference]: With dead ends: 61 [2021-11-22 14:41:01,812 INFO L226 Difference]: Without dead ends: 0 [2021-11-22 14:41:01,813 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 382 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=168, Invalid=1900, Unknown=2, NotChecked=0, Total=2070 [2021-11-22 14:41:01,814 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 19 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 65 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 14:41:01,814 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 351 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 64 Invalid, 0 Unknown, 65 Unchecked, 0.0s Time] [2021-11-22 14:41:01,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-22 14:41:01,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-22 14:41:01,815 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) [2021-11-22 14:41:01,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-22 14:41:01,815 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 54 [2021-11-22 14:41:01,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:41:01,816 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-22 14:41:01,816 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 28 states have (on average 3.142857142857143) internal successors, (88), 27 states have internal predecessors, (88), 5 states have call successors, (6), 2 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-22 14:41:01,816 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-22 14:41:01,816 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-22 14:41:01,819 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATION (18 of 19 remaining) [2021-11-22 14:41:01,819 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATION (17 of 19 remaining) [2021-11-22 14:41:01,819 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATION (16 of 19 remaining) [2021-11-22 14:41:01,820 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATION (15 of 19 remaining) [2021-11-22 14:41:01,820 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (14 of 19 remaining) [2021-11-22 14:41:01,820 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE (13 of 19 remaining) [2021-11-22 14:41:01,820 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE (12 of 19 remaining) [2021-11-22 14:41:01,820 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_FREE (11 of 19 remaining) [2021-11-22 14:41:01,820 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK (10 of 19 remaining) [2021-11-22 14:41:01,820 INFO L764 garLoopResultBuilder]: Registering result SAFE for location checkErr0ASSERT_VIOLATIONMEMORY_LEAK (9 of 19 remaining) [2021-11-22 14:41:01,821 INFO L764 garLoopResultBuilder]: Registering result SAFE for location checkErr1REQUIRES_VIOLATION (8 of 19 remaining) [2021-11-22 14:41:01,821 INFO L764 garLoopResultBuilder]: Registering result SAFE for location checkErr2REQUIRES_VIOLATION (7 of 19 remaining) [2021-11-22 14:41:01,821 INFO L764 garLoopResultBuilder]: Registering result SAFE for location checkErr3REQUIRES_VIOLATION (6 of 19 remaining) [2021-11-22 14:41:01,821 INFO L764 garLoopResultBuilder]: Registering result SAFE for location checkErr4REQUIRES_VIOLATION (5 of 19 remaining) [2021-11-22 14:41:01,821 INFO L764 garLoopResultBuilder]: Registering result SAFE for location checkErr5REQUIRES_VIOLATION (4 of 19 remaining) [2021-11-22 14:41:01,821 INFO L764 garLoopResultBuilder]: Registering result SAFE for location checkErr6REQUIRES_VIOLATION (3 of 19 remaining) [2021-11-22 14:41:01,821 INFO L764 garLoopResultBuilder]: Registering result SAFE for location checkErr7REQUIRES_VIOLATION (2 of 19 remaining) [2021-11-22 14:41:01,822 INFO L764 garLoopResultBuilder]: Registering result SAFE for location checkErr8REQUIRES_VIOLATION (1 of 19 remaining) [2021-11-22 14:41:01,822 INFO L764 garLoopResultBuilder]: Registering result SAFE for location checkErr9ASSERT_VIOLATIONMEMORY_LEAK (0 of 19 remaining) [2021-11-22 14:41:01,849 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_691190e7-8c70-4734-961f-7afe1496c1fb/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-22 14:41:02,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_691190e7-8c70-4734-961f-7afe1496c1fb/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:41:02,035 INFO L732 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:41:02,037 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-22 14:41:02,040 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.11 02:41:02 BoogieIcfgContainer [2021-11-22 14:41:02,040 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-22 14:41:02,041 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-22 14:41:02,041 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-22 14:41:02,041 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-22 14:41:02,042 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:40:03" (3/4) ... [2021-11-22 14:41:02,045 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-11-22 14:41:02,054 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure check [2021-11-22 14:41:02,073 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 23 nodes and edges [2021-11-22 14:41:02,074 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2021-11-22 14:41:02,074 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-11-22 14:41:02,075 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-11-22 14:41:02,132 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_691190e7-8c70-4734-961f-7afe1496c1fb/bin/uautomizer-w2VwFs6gM0/witness.graphml [2021-11-22 14:41:02,132 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-22 14:41:02,133 INFO L158 Benchmark]: Toolchain (without parser) took 59417.57ms. Allocated memory was 83.9MB in the beginning and 180.4MB in the end (delta: 96.5MB). Free memory was 47.3MB in the beginning and 84.4MB in the end (delta: -37.1MB). Peak memory consumption was 60.0MB. Max. memory is 16.1GB. [2021-11-22 14:41:02,134 INFO L158 Benchmark]: CDTParser took 0.32ms. Allocated memory is still 83.9MB. Free memory was 64.4MB in the beginning and 64.3MB in the end (delta: 84.1kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-22 14:41:02,134 INFO L158 Benchmark]: CACSL2BoogieTranslator took 310.76ms. Allocated memory was 83.9MB in the beginning and 102.8MB in the end (delta: 18.9MB). Free memory was 47.1MB in the beginning and 78.5MB in the end (delta: -31.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-22 14:41:02,135 INFO L158 Benchmark]: Boogie Procedure Inliner took 49.30ms. Allocated memory is still 102.8MB. Free memory was 78.1MB in the beginning and 76.4MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-22 14:41:02,135 INFO L158 Benchmark]: Boogie Preprocessor took 32.25ms. Allocated memory is still 102.8MB. Free memory was 76.4MB in the beginning and 75.2MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-22 14:41:02,136 INFO L158 Benchmark]: RCFGBuilder took 445.88ms. Allocated memory is still 102.8MB. Free memory was 75.2MB in the beginning and 62.2MB in the end (delta: 13.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-22 14:41:02,136 INFO L158 Benchmark]: TraceAbstraction took 58479.69ms. Allocated memory was 102.8MB in the beginning and 180.4MB in the end (delta: 77.6MB). Free memory was 61.3MB in the beginning and 88.4MB in the end (delta: -27.0MB). Peak memory consumption was 52.2MB. Max. memory is 16.1GB. [2021-11-22 14:41:02,137 INFO L158 Benchmark]: Witness Printer took 91.68ms. Allocated memory is still 180.4MB. Free memory was 88.4MB in the beginning and 84.4MB in the end (delta: 4.0MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-11-22 14:41:02,139 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32ms. Allocated memory is still 83.9MB. Free memory was 64.4MB in the beginning and 64.3MB in the end (delta: 84.1kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 310.76ms. Allocated memory was 83.9MB in the beginning and 102.8MB in the end (delta: 18.9MB). Free memory was 47.1MB in the beginning and 78.5MB in the end (delta: -31.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 49.30ms. Allocated memory is still 102.8MB. Free memory was 78.1MB in the beginning and 76.4MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 32.25ms. Allocated memory is still 102.8MB. Free memory was 76.4MB in the beginning and 75.2MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 445.88ms. Allocated memory is still 102.8MB. Free memory was 75.2MB in the beginning and 62.2MB in the end (delta: 13.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 58479.69ms. Allocated memory was 102.8MB in the beginning and 180.4MB in the end (delta: 77.6MB). Free memory was 61.3MB in the beginning and 88.4MB in the end (delta: -27.0MB). Peak memory consumption was 52.2MB. Max. memory is 16.1GB. * Witness Printer took 91.68ms. Allocated memory is still 180.4MB. Free memory was 88.4MB in the beginning and 84.4MB in the end (delta: 4.0MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 48]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 48]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 49]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 49]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 11]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 52]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 52]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 52]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 40]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 11]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 26]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 26]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 26]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 26]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 33]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 33]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 34]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 34]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 11]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 62 locations, 19 error locations. Started 1 CEGAR loops. OverallTime: 58.4s, OverallIterations: 22, TraceHistogramMax: 4, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 9.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2588 SdHoareTripleChecker+Valid, 3.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2574 mSDsluCounter, 5415 SdHoareTripleChecker+Invalid, 3.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 518 IncrementalHoareTripleChecker+Unchecked, 4526 mSDsCounter, 444 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 3928 IncrementalHoareTripleChecker+Invalid, 4890 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 444 mSolverCounterUnsat, 889 mSDtfsCounter, 3928 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 928 GetRequests, 481 SyntacticMatches, 16 SemanticMatches, 431 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2603 ImplicationChecksByTransitivity, 33.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=155occurred in iteration=15, InterpolantAutomatonStates: 252, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 22 MinimizatonAttempts, 434 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 44.8s InterpolantComputationTime, 905 NumberOfCodeBlocks, 905 NumberOfCodeBlocksAsserted, 35 NumberOfCheckSat, 1033 ConstructedInterpolants, 107 QuantifiedInterpolants, 9681 SizeOfPredicates, 113 NumberOfNonLiveVariables, 2205 ConjunctsInSsa, 273 ConjunctsInUnsatCore, 39 InterpolantComputations, 12 PerfectInterpolantSequences, 156/308 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 19 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-11-22 14:41:02,179 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_691190e7-8c70-4734-961f-7afe1496c1fb/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE