./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/termination-numeric/TerminatorRec02.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version b2eff8ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e587ca32-b732-4af4-8510-f84c93de67db/bin/uautomizer-GMMbpWq8iD/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e587ca32-b732-4af4-8510-f84c93de67db/bin/uautomizer-GMMbpWq8iD/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e587ca32-b732-4af4-8510-f84c93de67db/bin/uautomizer-GMMbpWq8iD/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e587ca32-b732-4af4-8510-f84c93de67db/bin/uautomizer-GMMbpWq8iD/config/AutomizerReach.xml -i ../../sv-benchmarks/c/termination-numeric/TerminatorRec02.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e587ca32-b732-4af4-8510-f84c93de67db/bin/uautomizer-GMMbpWq8iD/config/svcomp-Overflow-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e587ca32-b732-4af4-8510-f84c93de67db/bin/uautomizer-GMMbpWq8iD --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 744c3d26555bbd53a7a0d9e7c64efe010ba06d0f67ec9ca21eb74ed1148222d3 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis No suitable file found in config dir /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e587ca32-b732-4af4-8510-f84c93de67db/bin/uautomizer-GMMbpWq8iD/config using search string *Overflow*64bit*_Bitvector*.epf No suitable settings file found using Overflow*64bit*_Bitvector ERROR: UNSUPPORTED PROPERTY Writing output log to file Ultimate.log Result: UNKNOWN --- Real Ultimate output --- This is Ultimate 0.2.1-dev-b2eff8b [2021-10-29 00:01:21,989 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-29 00:01:21,991 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-29 00:01:22,041 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-29 00:01:22,042 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-29 00:01:22,048 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-29 00:01:22,051 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-29 00:01:22,056 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-29 00:01:22,059 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-29 00:01:22,067 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-29 00:01:22,069 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-29 00:01:22,071 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-29 00:01:22,071 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-29 00:01:22,075 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-29 00:01:22,078 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-29 00:01:22,085 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-29 00:01:22,086 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-29 00:01:22,088 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-29 00:01:22,090 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-29 00:01:22,098 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-29 00:01:22,101 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-29 00:01:22,102 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-29 00:01:22,107 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-29 00:01:22,108 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-29 00:01:22,115 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-29 00:01:22,115 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-29 00:01:22,116 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-29 00:01:22,118 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-29 00:01:22,119 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-29 00:01:22,120 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-29 00:01:22,122 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-29 00:01:22,123 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-29 00:01:22,125 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-29 00:01:22,126 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-29 00:01:22,128 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-29 00:01:22,129 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-29 00:01:22,130 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-29 00:01:22,130 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-29 00:01:22,130 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-29 00:01:22,132 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-29 00:01:22,133 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-29 00:01:22,134 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e587ca32-b732-4af4-8510-f84c93de67db/bin/uautomizer-GMMbpWq8iD/config/svcomp-Overflow-64bit-Automizer_Default.epf [2021-10-29 00:01:22,185 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-29 00:01:22,186 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-29 00:01:22,186 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-29 00:01:22,187 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-29 00:01:22,194 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-29 00:01:22,195 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-29 00:01:22,195 INFO L138 SettingsManager]: * Use SBE=true [2021-10-29 00:01:22,195 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-29 00:01:22,196 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-29 00:01:22,196 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-29 00:01:22,197 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-29 00:01:22,197 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-29 00:01:22,198 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-29 00:01:22,198 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-29 00:01:22,198 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2021-10-29 00:01:22,198 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-29 00:01:22,198 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-29 00:01:22,199 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-29 00:01:22,199 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-29 00:01:22,199 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-29 00:01:22,199 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-29 00:01:22,200 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-29 00:01:22,200 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-29 00:01:22,200 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-29 00:01:22,200 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-29 00:01:22,201 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-29 00:01:22,201 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-29 00:01:22,201 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-29 00:01:22,201 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-29 00:01:22,203 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_e587ca32-b732-4af4-8510-f84c93de67db/bin/uautomizer-GMMbpWq8iD/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e587ca32-b732-4af4-8510-f84c93de67db/bin/uautomizer-GMMbpWq8iD Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 744c3d26555bbd53a7a0d9e7c64efe010ba06d0f67ec9ca21eb74ed1148222d3 [2021-10-29 00:01:22,515 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-29 00:01:22,540 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-29 00:01:22,543 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-29 00:01:22,544 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-29 00:01:22,545 INFO L275 PluginConnector]: CDTParser initialized [2021-10-29 00:01:22,546 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e587ca32-b732-4af4-8510-f84c93de67db/bin/uautomizer-GMMbpWq8iD/../../sv-benchmarks/c/termination-numeric/TerminatorRec02.c [2021-10-29 00:01:22,615 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e587ca32-b732-4af4-8510-f84c93de67db/bin/uautomizer-GMMbpWq8iD/data/f68941a54/700d28fd275d49fa85d31129e93a12d5/FLAG1bb57f687 [2021-10-29 00:01:23,097 INFO L306 CDTParser]: Found 1 translation units. [2021-10-29 00:01:23,101 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e587ca32-b732-4af4-8510-f84c93de67db/sv-benchmarks/c/termination-numeric/TerminatorRec02.c [2021-10-29 00:01:23,107 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e587ca32-b732-4af4-8510-f84c93de67db/bin/uautomizer-GMMbpWq8iD/data/f68941a54/700d28fd275d49fa85d31129e93a12d5/FLAG1bb57f687 [2021-10-29 00:01:23,467 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e587ca32-b732-4af4-8510-f84c93de67db/bin/uautomizer-GMMbpWq8iD/data/f68941a54/700d28fd275d49fa85d31129e93a12d5 [2021-10-29 00:01:23,469 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-29 00:01:23,471 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-29 00:01:23,473 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-29 00:01:23,474 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-29 00:01:23,478 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-29 00:01:23,479 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 12:01:23" (1/1) ... [2021-10-29 00:01:23,480 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@332f2415 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 12:01:23, skipping insertion in model container [2021-10-29 00:01:23,480 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 12:01:23" (1/1) ... [2021-10-29 00:01:23,488 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-29 00:01:23,502 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-29 00:01:23,660 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-29 00:01:23,665 INFO L203 MainTranslator]: Completed pre-run [2021-10-29 00:01:23,715 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-29 00:01:23,730 INFO L208 MainTranslator]: Completed translation [2021-10-29 00:01:23,731 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 12:01:23 WrapperNode [2021-10-29 00:01:23,731 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-29 00:01:23,732 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-29 00:01:23,732 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-29 00:01:23,732 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-29 00:01:23,742 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 12:01:23" (1/1) ... [2021-10-29 00:01:23,747 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 12:01:23" (1/1) ... [2021-10-29 00:01:23,768 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-29 00:01:23,769 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-29 00:01:23,769 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-29 00:01:23,769 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-29 00:01:23,779 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 12:01:23" (1/1) ... [2021-10-29 00:01:23,780 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 12:01:23" (1/1) ... [2021-10-29 00:01:23,781 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 12:01:23" (1/1) ... [2021-10-29 00:01:23,781 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 12:01:23" (1/1) ... [2021-10-29 00:01:23,784 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 12:01:23" (1/1) ... [2021-10-29 00:01:23,786 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 12:01:23" (1/1) ... [2021-10-29 00:01:23,788 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 12:01:23" (1/1) ... [2021-10-29 00:01:23,789 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-29 00:01:23,790 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-29 00:01:23,791 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-29 00:01:23,791 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-29 00:01:23,792 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 12:01:23" (1/1) ... [2021-10-29 00:01:23,802 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-29 00:01:23,815 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e587ca32-b732-4af4-8510-f84c93de67db/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-29 00:01:23,830 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e587ca32-b732-4af4-8510-f84c93de67db/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-29 00:01:23,852 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e587ca32-b732-4af4-8510-f84c93de67db/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-29 00:01:23,894 INFO L130 BoogieDeclarations]: Found specification of procedure fact [2021-10-29 00:01:23,895 INFO L138 BoogieDeclarations]: Found implementation of procedure fact [2021-10-29 00:01:23,896 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-29 00:01:23,896 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-29 00:01:24,179 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-29 00:01:24,180 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-10-29 00:01:24,181 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 12:01:24 BoogieIcfgContainer [2021-10-29 00:01:24,182 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-29 00:01:24,184 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-29 00:01:24,184 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-29 00:01:24,194 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-29 00:01:24,194 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 12:01:23" (1/3) ... [2021-10-29 00:01:24,195 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e17c36f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 12:01:24, skipping insertion in model container [2021-10-29 00:01:24,195 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 12:01:23" (2/3) ... [2021-10-29 00:01:24,196 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e17c36f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 12:01:24, skipping insertion in model container [2021-10-29 00:01:24,196 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 12:01:24" (3/3) ... [2021-10-29 00:01:24,198 INFO L111 eAbstractionObserver]: Analyzing ICFG TerminatorRec02.c [2021-10-29 00:01:24,205 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-29 00:01:24,205 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2021-10-29 00:01:24,272 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-29 00:01:24,285 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-29 00:01:24,286 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-10-29 00:01:24,304 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 14 states have (on average 1.5) internal successors, (21), 18 states have internal predecessors, (21), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-29 00:01:24,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-29 00:01:24,308 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 00:01:24,309 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-29 00:01:24,310 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting factErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [factErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-10-29 00:01:24,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 00:01:24,316 INFO L85 PathProgramCache]: Analyzing trace with hash 306322899, now seen corresponding path program 1 times [2021-10-29 00:01:24,329 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-29 00:01:24,330 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165580328] [2021-10-29 00:01:24,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 00:01:24,332 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 00:01:24,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:01:24,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 00:01:24,527 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-29 00:01:24,527 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165580328] [2021-10-29 00:01:24,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165580328] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 00:01:24,529 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 00:01:24,529 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-29 00:01:24,531 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550212193] [2021-10-29 00:01:24,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-29 00:01:24,537 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-29 00:01:24,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-29 00:01:24,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-29 00:01:24,556 INFO L87 Difference]: Start difference. First operand has 22 states, 14 states have (on average 1.5) internal successors, (21), 18 states have internal predecessors, (21), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 00:01:24,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 00:01:24,699 INFO L93 Difference]: Finished difference Result 22 states and 25 transitions. [2021-10-29 00:01:24,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-29 00:01:24,702 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-10-29 00:01:24,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 00:01:24,710 INFO L225 Difference]: With dead ends: 22 [2021-10-29 00:01:24,710 INFO L226 Difference]: Without dead ends: 17 [2021-10-29 00:01:24,713 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-29 00:01:24,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-10-29 00:01:24,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-10-29 00:01:24,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 14 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-29 00:01:24,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2021-10-29 00:01:24,785 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 7 [2021-10-29 00:01:24,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 00:01:24,785 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2021-10-29 00:01:24,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 00:01:24,786 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2021-10-29 00:01:24,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-29 00:01:24,787 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 00:01:24,787 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 00:01:24,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-29 00:01:24,788 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting factErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [factErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-10-29 00:01:24,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 00:01:24,789 INFO L85 PathProgramCache]: Analyzing trace with hash 906075314, now seen corresponding path program 1 times [2021-10-29 00:01:24,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-29 00:01:24,790 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423459718] [2021-10-29 00:01:24,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 00:01:24,790 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 00:01:24,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:01:24,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 00:01:24,825 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-29 00:01:24,826 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423459718] [2021-10-29 00:01:24,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423459718] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 00:01:24,826 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 00:01:24,826 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-29 00:01:24,827 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498834245] [2021-10-29 00:01:24,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-29 00:01:24,833 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-29 00:01:24,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-29 00:01:24,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-29 00:01:24,837 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 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) [2021-10-29 00:01:24,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 00:01:24,872 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2021-10-29 00:01:24,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-29 00:01:24,873 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 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 8 [2021-10-29 00:01:24,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 00:01:24,875 INFO L225 Difference]: With dead ends: 19 [2021-10-29 00:01:24,876 INFO L226 Difference]: Without dead ends: 18 [2021-10-29 00:01:24,877 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-29 00:01:24,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-10-29 00:01:24,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 16. [2021-10-29 00:01:24,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 13 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-29 00:01:24,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2021-10-29 00:01:24,891 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 8 [2021-10-29 00:01:24,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 00:01:24,892 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2021-10-29 00:01:24,893 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 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) [2021-10-29 00:01:24,893 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2021-10-29 00:01:24,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-29 00:01:24,895 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 00:01:24,895 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 00:01:24,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-29 00:01:24,897 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting factErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [factErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-10-29 00:01:24,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 00:01:24,900 INFO L85 PathProgramCache]: Analyzing trace with hash 1137733808, now seen corresponding path program 1 times [2021-10-29 00:01:24,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-29 00:01:24,901 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779072677] [2021-10-29 00:01:24,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 00:01:24,902 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 00:01:24,940 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-29 00:01:24,941 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [823894122] [2021-10-29 00:01:24,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 00:01:24,942 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 00:01:24,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e587ca32-b732-4af4-8510-f84c93de67db/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-29 00:01:24,944 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e587ca32-b732-4af4-8510-f84c93de67db/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-29 00:01:24,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e587ca32-b732-4af4-8510-f84c93de67db/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-29 00:01:25,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:01:25,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-29 00:01:25,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 00:01:25,265 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 00:01:25,266 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-29 00:01:25,266 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779072677] [2021-10-29 00:01:25,266 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-29 00:01:25,266 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823894122] [2021-10-29 00:01:25,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [823894122] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-29 00:01:25,267 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-29 00:01:25,267 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-10-29 00:01:25,267 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083679328] [2021-10-29 00:01:25,268 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-29 00:01:25,268 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-29 00:01:25,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-29 00:01:25,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-10-29 00:01:25,270 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 10 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-29 00:01:25,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 00:01:25,525 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2021-10-29 00:01:25,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-29 00:01:25,525 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2021-10-29 00:01:25,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 00:01:25,528 INFO L225 Difference]: With dead ends: 39 [2021-10-29 00:01:25,528 INFO L226 Difference]: Without dead ends: 34 [2021-10-29 00:01:25,531 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-10-29 00:01:25,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-10-29 00:01:25,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 28. [2021-10-29 00:01:25,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 22 states have internal predecessors, (25), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-10-29 00:01:25,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2021-10-29 00:01:25,563 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 20 [2021-10-29 00:01:25,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 00:01:25,564 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2021-10-29 00:01:25,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-29 00:01:25,565 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2021-10-29 00:01:25,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-29 00:01:25,568 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 00:01:25,569 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 00:01:25,611 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e587ca32-b732-4af4-8510-f84c93de67db/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-29 00:01:25,782 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e587ca32-b732-4af4-8510-f84c93de67db/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 00:01:25,783 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting factErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [factErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-10-29 00:01:25,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 00:01:25,783 INFO L85 PathProgramCache]: Analyzing trace with hash -484212048, now seen corresponding path program 2 times [2021-10-29 00:01:25,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-29 00:01:25,784 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89010937] [2021-10-29 00:01:25,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 00:01:25,784 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 00:01:25,798 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-29 00:01:25,798 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1426162345] [2021-10-29 00:01:25,798 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-29 00:01:25,799 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 00:01:25,799 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e587ca32-b732-4af4-8510-f84c93de67db/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-29 00:01:25,800 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e587ca32-b732-4af4-8510-f84c93de67db/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-29 00:01:25,815 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e587ca32-b732-4af4-8510-f84c93de67db/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-29 00:01:25,867 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-29 00:01:25,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-29 00:01:25,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-29 00:01:25,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 00:01:26,014 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 00:01:26,015 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-29 00:01:26,017 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89010937] [2021-10-29 00:01:26,017 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-29 00:01:26,017 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426162345] [2021-10-29 00:01:26,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426162345] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-29 00:01:26,018 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-29 00:01:26,019 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-10-29 00:01:26,020 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217691884] [2021-10-29 00:01:26,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-29 00:01:26,021 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-29 00:01:26,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-29 00:01:26,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-10-29 00:01:26,025 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 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) [2021-10-29 00:01:26,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 00:01:26,145 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2021-10-29 00:01:26,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-29 00:01:26,146 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 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 15 [2021-10-29 00:01:26,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 00:01:26,149 INFO L225 Difference]: With dead ends: 36 [2021-10-29 00:01:26,150 INFO L226 Difference]: Without dead ends: 35 [2021-10-29 00:01:26,150 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-10-29 00:01:26,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-10-29 00:01:26,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 30. [2021-10-29 00:01:26,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 states have internal predecessors, (27), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2021-10-29 00:01:26,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2021-10-29 00:01:26,170 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 15 [2021-10-29 00:01:26,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 00:01:26,170 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2021-10-29 00:01:26,171 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 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) [2021-10-29 00:01:26,171 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2021-10-29 00:01:26,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-29 00:01:26,173 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 00:01:26,173 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 00:01:26,215 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e587ca32-b732-4af4-8510-f84c93de67db/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-29 00:01:26,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e587ca32-b732-4af4-8510-f84c93de67db/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-10-29 00:01:26,400 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting factErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [factErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-10-29 00:01:26,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 00:01:26,401 INFO L85 PathProgramCache]: Analyzing trace with hash -2125671557, now seen corresponding path program 1 times [2021-10-29 00:01:26,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-29 00:01:26,401 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965483001] [2021-10-29 00:01:26,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 00:01:26,402 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 00:01:26,415 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-29 00:01:26,416 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [342436262] [2021-10-29 00:01:26,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 00:01:26,417 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 00:01:26,417 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e587ca32-b732-4af4-8510-f84c93de67db/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-29 00:01:26,418 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e587ca32-b732-4af4-8510-f84c93de67db/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-29 00:01:26,438 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e587ca32-b732-4af4-8510-f84c93de67db/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-29 00:01:26,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:01:26,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-29 00:01:26,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 00:01:26,638 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-29 00:01:26,639 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-29 00:01:26,639 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965483001] [2021-10-29 00:01:26,639 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-29 00:01:26,640 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342436262] [2021-10-29 00:01:26,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [342436262] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 00:01:26,640 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 00:01:26,641 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-29 00:01:26,641 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202139006] [2021-10-29 00:01:26,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-29 00:01:26,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-29 00:01:26,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-29 00:01:26,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-10-29 00:01:26,647 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 7 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-29 00:01:26,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 00:01:26,695 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2021-10-29 00:01:26,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-29 00:01:26,696 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (2), 1 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 16 [2021-10-29 00:01:26,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 00:01:26,700 INFO L225 Difference]: With dead ends: 30 [2021-10-29 00:01:26,704 INFO L226 Difference]: Without dead ends: 26 [2021-10-29 00:01:26,707 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-29 00:01:26,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-10-29 00:01:26,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-10-29 00:01:26,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 20 states have (on average 1.1) internal successors, (22), 20 states have internal predecessors, (22), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-10-29 00:01:26,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2021-10-29 00:01:26,722 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 16 [2021-10-29 00:01:26,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 00:01:26,722 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2021-10-29 00:01:26,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-29 00:01:26,723 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2021-10-29 00:01:26,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-29 00:01:26,724 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 00:01:26,724 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 00:01:26,768 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e587ca32-b732-4af4-8510-f84c93de67db/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-29 00:01:26,925 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e587ca32-b732-4af4-8510-f84c93de67db/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 00:01:26,925 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting factErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [factErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-10-29 00:01:26,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 00:01:26,926 INFO L85 PathProgramCache]: Analyzing trace with hash 1370659280, now seen corresponding path program 1 times [2021-10-29 00:01:26,926 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-29 00:01:26,926 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028786220] [2021-10-29 00:01:26,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 00:01:26,927 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 00:01:26,945 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-29 00:01:26,946 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1547042189] [2021-10-29 00:01:26,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 00:01:26,946 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 00:01:26,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e587ca32-b732-4af4-8510-f84c93de67db/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-29 00:01:26,948 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e587ca32-b732-4af4-8510-f84c93de67db/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-29 00:01:26,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e587ca32-b732-4af4-8510-f84c93de67db/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-29 00:01:27,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:01:27,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-29 00:01:27,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 00:01:27,362 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 18 proven. 8 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-29 00:01:27,362 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-29 00:01:27,363 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028786220] [2021-10-29 00:01:27,363 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-29 00:01:27,363 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547042189] [2021-10-29 00:01:27,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547042189] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-29 00:01:27,363 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-29 00:01:27,363 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-10-29 00:01:27,364 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997028452] [2021-10-29 00:01:27,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-29 00:01:27,364 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-29 00:01:27,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-29 00:01:27,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-10-29 00:01:27,366 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand has 11 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 3 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-29 00:01:27,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 00:01:27,571 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2021-10-29 00:01:27,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-29 00:01:27,572 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 3 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 35 [2021-10-29 00:01:27,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 00:01:27,573 INFO L225 Difference]: With dead ends: 37 [2021-10-29 00:01:27,573 INFO L226 Difference]: Without dead ends: 34 [2021-10-29 00:01:27,574 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2021-10-29 00:01:27,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-10-29 00:01:27,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 31. [2021-10-29 00:01:27,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 24 states have internal predecessors, (26), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2021-10-29 00:01:27,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2021-10-29 00:01:27,581 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 35 [2021-10-29 00:01:27,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 00:01:27,581 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2021-10-29 00:01:27,582 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 3 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-29 00:01:27,582 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2021-10-29 00:01:27,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-29 00:01:27,583 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 00:01:27,583 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2021-10-29 00:01:27,610 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e587ca32-b732-4af4-8510-f84c93de67db/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-29 00:01:27,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e587ca32-b732-4af4-8510-f84c93de67db/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-10-29 00:01:27,796 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting factErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [factErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-10-29 00:01:27,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 00:01:27,796 INFO L85 PathProgramCache]: Analyzing trace with hash -511805776, now seen corresponding path program 2 times [2021-10-29 00:01:27,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-29 00:01:27,796 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826382796] [2021-10-29 00:01:27,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 00:01:27,797 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 00:01:27,810 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-29 00:01:27,810 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1351533868] [2021-10-29 00:01:27,811 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-29 00:01:27,811 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 00:01:27,811 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e587ca32-b732-4af4-8510-f84c93de67db/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-29 00:01:27,812 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e587ca32-b732-4af4-8510-f84c93de67db/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-29 00:01:27,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e587ca32-b732-4af4-8510-f84c93de67db/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-29 00:01:27,893 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-29 00:01:27,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-29 00:01:27,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-29 00:01:27,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 00:01:28,625 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-29 00:01:28,626 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-29 00:01:28,626 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826382796] [2021-10-29 00:01:28,626 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-29 00:01:28,626 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351533868] [2021-10-29 00:01:28,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351533868] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-29 00:01:28,632 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-29 00:01:28,632 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-10-29 00:01:28,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497043875] [2021-10-29 00:01:28,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-29 00:01:28,633 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-29 00:01:28,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-29 00:01:28,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-10-29 00:01:28,636 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand has 14 states, 13 states have (on average 2.0) internal successors, (26), 11 states have internal predecessors, (26), 4 states have call successors, (4), 1 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-29 00:01:28,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 00:01:28,957 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2021-10-29 00:01:28,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-29 00:01:28,959 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 11 states have internal predecessors, (26), 4 states have call successors, (4), 1 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 35 [2021-10-29 00:01:28,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 00:01:28,960 INFO L225 Difference]: With dead ends: 42 [2021-10-29 00:01:28,960 INFO L226 Difference]: Without dead ends: 39 [2021-10-29 00:01:28,961 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=102, Invalid=318, Unknown=0, NotChecked=0, Total=420 [2021-10-29 00:01:28,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-10-29 00:01:28,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 36. [2021-10-29 00:01:28,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 28 states have internal predecessors, (30), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (5), 5 states have call predecessors, (5), 2 states have call successors, (5) [2021-10-29 00:01:28,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2021-10-29 00:01:28,967 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 35 [2021-10-29 00:01:28,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 00:01:28,971 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2021-10-29 00:01:28,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 11 states have internal predecessors, (26), 4 states have call successors, (4), 1 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-29 00:01:28,971 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2021-10-29 00:01:28,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-10-29 00:01:28,978 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 00:01:28,978 INFO L513 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2021-10-29 00:01:29,008 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e587ca32-b732-4af4-8510-f84c93de67db/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-29 00:01:29,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e587ca32-b732-4af4-8510-f84c93de67db/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-10-29 00:01:29,192 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting factErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [factErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-10-29 00:01:29,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 00:01:29,192 INFO L85 PathProgramCache]: Analyzing trace with hash 135472592, now seen corresponding path program 3 times [2021-10-29 00:01:29,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-29 00:01:29,192 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002741593] [2021-10-29 00:01:29,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 00:01:29,193 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 00:01:29,224 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-29 00:01:29,224 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2021159020] [2021-10-29 00:01:29,224 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-29 00:01:29,224 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 00:01:29,224 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e587ca32-b732-4af4-8510-f84c93de67db/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-29 00:01:29,233 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e587ca32-b732-4af4-8510-f84c93de67db/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-29 00:01:29,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e587ca32-b732-4af4-8510-f84c93de67db/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-29 00:01:29,348 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-10-29 00:01:29,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-29 00:01:29,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 32 conjunts are in the unsatisfiable core [2021-10-29 00:01:29,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 00:01:34,202 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 42 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-10-29 00:01:34,202 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-29 00:01:34,203 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002741593] [2021-10-29 00:01:34,203 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-29 00:01:34,203 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021159020] [2021-10-29 00:01:34,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021159020] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-29 00:01:34,203 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-29 00:01:34,203 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-10-29 00:01:34,204 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687079561] [2021-10-29 00:01:34,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-29 00:01:34,204 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-29 00:01:34,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-29 00:01:34,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=249, Unknown=3, NotChecked=0, Total=306 [2021-10-29 00:01:34,206 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand has 18 states, 17 states have (on average 2.0) internal successors, (34), 14 states have internal predecessors, (34), 4 states have call successors, (5), 1 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-29 00:02:13,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 00:02:13,782 INFO L93 Difference]: Finished difference Result 47 states and 51 transitions. [2021-10-29 00:02:13,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-29 00:02:13,783 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.0) internal successors, (34), 14 states have internal predecessors, (34), 4 states have call successors, (5), 1 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 55 [2021-10-29 00:02:13,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 00:02:13,785 INFO L225 Difference]: With dead ends: 47 [2021-10-29 00:02:13,785 INFO L226 Difference]: Without dead ends: 44 [2021-10-29 00:02:13,786 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 16.9s TimeCoverageRelationStatistics Valid=168, Invalid=697, Unknown=5, NotChecked=0, Total=870 [2021-10-29 00:02:13,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-10-29 00:02:13,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 41. [2021-10-29 00:02:13,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 32 states have (on average 1.0625) internal successors, (34), 32 states have internal predecessors, (34), 3 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (6), 6 states have call predecessors, (6), 2 states have call successors, (6) [2021-10-29 00:02:13,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2021-10-29 00:02:13,794 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 55 [2021-10-29 00:02:13,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 00:02:13,794 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2021-10-29 00:02:13,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.0) internal successors, (34), 14 states have internal predecessors, (34), 4 states have call successors, (5), 1 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-29 00:02:13,795 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2021-10-29 00:02:13,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-10-29 00:02:13,796 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 00:02:13,797 INFO L513 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1] [2021-10-29 00:02:13,838 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e587ca32-b732-4af4-8510-f84c93de67db/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-29 00:02:13,997 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e587ca32-b732-4af4-8510-f84c93de67db/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 00:02:13,998 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting factErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [factErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-10-29 00:02:13,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 00:02:13,998 INFO L85 PathProgramCache]: Analyzing trace with hash -2130892112, now seen corresponding path program 4 times [2021-10-29 00:02:13,998 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-29 00:02:13,999 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216387851] [2021-10-29 00:02:13,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 00:02:13,999 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 00:02:14,023 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-29 00:02:14,024 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [722914514] [2021-10-29 00:02:14,024 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-29 00:02:14,024 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 00:02:14,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e587ca32-b732-4af4-8510-f84c93de67db/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-29 00:02:14,026 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e587ca32-b732-4af4-8510-f84c93de67db/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-29 00:02:14,036 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e587ca32-b732-4af4-8510-f84c93de67db/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-29 00:02:14,188 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-29 00:02:14,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-29 00:02:14,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 45 conjunts are in the unsatisfiable core [2021-10-29 00:02:14,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 00:02:20,674 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 53 proven. 66 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-10-29 00:02:20,675 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-29 00:02:20,675 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216387851] [2021-10-29 00:02:20,675 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-29 00:02:20,675 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722914514] [2021-10-29 00:02:20,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722914514] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-29 00:02:20,675 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-29 00:02:20,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2021-10-29 00:02:20,676 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116542603] [2021-10-29 00:02:20,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-29 00:02:20,676 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-29 00:02:20,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-29 00:02:20,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=370, Unknown=2, NotChecked=0, Total=462 [2021-10-29 00:02:20,678 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand has 22 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 17 states have internal predecessors, (38), 4 states have call successors, (5), 1 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2021-10-29 00:02:46,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 00:02:46,668 INFO L93 Difference]: Finished difference Result 52 states and 56 transitions. [2021-10-29 00:02:46,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-29 00:02:46,669 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 17 states have internal predecessors, (38), 4 states have call successors, (5), 1 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 65 [2021-10-29 00:02:46,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 00:02:46,670 INFO L225 Difference]: With dead ends: 52 [2021-10-29 00:02:46,671 INFO L226 Difference]: Without dead ends: 49 [2021-10-29 00:02:46,672 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 20.2s TimeCoverageRelationStatistics Valid=168, Invalid=696, Unknown=6, NotChecked=0, Total=870 [2021-10-29 00:02:46,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-10-29 00:02:46,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 46. [2021-10-29 00:02:46,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 36 states have (on average 1.0555555555555556) internal successors, (38), 36 states have internal predecessors, (38), 3 states have call successors, (3), 2 states have call predecessors, (3), 6 states have return successors, (7), 7 states have call predecessors, (7), 2 states have call successors, (7) [2021-10-29 00:02:46,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2021-10-29 00:02:46,679 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 65 [2021-10-29 00:02:46,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 00:02:46,680 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2021-10-29 00:02:46,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 17 states have internal predecessors, (38), 4 states have call successors, (5), 1 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2021-10-29 00:02:46,680 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2021-10-29 00:02:46,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-10-29 00:02:46,682 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 00:02:46,682 INFO L513 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1] [2021-10-29 00:02:46,709 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e587ca32-b732-4af4-8510-f84c93de67db/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-10-29 00:02:46,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e587ca32-b732-4af4-8510-f84c93de67db/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 00:02:46,888 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting factErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [factErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-10-29 00:02:46,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 00:02:46,888 INFO L85 PathProgramCache]: Analyzing trace with hash 1045737936, now seen corresponding path program 5 times [2021-10-29 00:02:46,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-29 00:02:46,888 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001289749] [2021-10-29 00:02:46,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 00:02:46,889 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 00:02:46,908 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-29 00:02:46,908 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [59073053] [2021-10-29 00:02:46,908 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-29 00:02:46,909 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 00:02:46,909 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e587ca32-b732-4af4-8510-f84c93de67db/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-29 00:02:46,910 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e587ca32-b732-4af4-8510-f84c93de67db/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-29 00:02:46,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e587ca32-b732-4af4-8510-f84c93de67db/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-29 00:02:47,146 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-10-29 00:02:47,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-29 00:02:47,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 57 conjunts are in the unsatisfiable core [2021-10-29 00:02:47,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 00:02:52,894 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 78 proven. 84 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-10-29 00:02:52,895 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-29 00:02:52,895 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001289749] [2021-10-29 00:02:52,895 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-29 00:02:52,896 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59073053] [2021-10-29 00:02:52,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59073053] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-29 00:02:52,896 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-29 00:02:52,896 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2021-10-29 00:02:52,896 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614673212] [2021-10-29 00:02:52,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-10-29 00:02:52,897 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-29 00:02:52,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-29 00:02:52,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=458, Unknown=3, NotChecked=0, Total=552 [2021-10-29 00:02:52,899 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand has 24 states, 23 states have (on average 1.826086956521739) internal successors, (42), 18 states have internal predecessors, (42), 4 states have call successors, (5), 1 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 3 states have call successors, (6) [2021-10-29 00:02:59,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 00:02:59,027 INFO L93 Difference]: Finished difference Result 57 states and 61 transitions. [2021-10-29 00:02:59,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-29 00:02:59,028 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.826086956521739) internal successors, (42), 18 states have internal predecessors, (42), 4 states have call successors, (5), 1 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 3 states have call successors, (6) Word has length 75 [2021-10-29 00:02:59,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 00:02:59,030 INFO L225 Difference]: With dead ends: 57 [2021-10-29 00:02:59,030 INFO L226 Difference]: Without dead ends: 54 [2021-10-29 00:02:59,031 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=150, Invalid=838, Unknown=4, NotChecked=0, Total=992 [2021-10-29 00:02:59,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-10-29 00:02:59,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 51. [2021-10-29 00:02:59,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 40 states have (on average 1.05) internal successors, (42), 40 states have internal predecessors, (42), 3 states have call successors, (3), 2 states have call predecessors, (3), 7 states have return successors, (8), 8 states have call predecessors, (8), 2 states have call successors, (8) [2021-10-29 00:02:59,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2021-10-29 00:02:59,039 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 75 [2021-10-29 00:02:59,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 00:02:59,039 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2021-10-29 00:02:59,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.826086956521739) internal successors, (42), 18 states have internal predecessors, (42), 4 states have call successors, (5), 1 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 3 states have call successors, (6) [2021-10-29 00:02:59,040 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2021-10-29 00:02:59,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-10-29 00:02:59,041 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 00:02:59,042 INFO L513 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1] [2021-10-29 00:02:59,079 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e587ca32-b732-4af4-8510-f84c93de67db/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-10-29 00:02:59,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e587ca32-b732-4af4-8510-f84c93de67db/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-10-29 00:02:59,264 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting factErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [factErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-10-29 00:02:59,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 00:02:59,264 INFO L85 PathProgramCache]: Analyzing trace with hash 1936809648, now seen corresponding path program 6 times [2021-10-29 00:02:59,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-29 00:02:59,264 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795918785] [2021-10-29 00:02:59,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 00:02:59,265 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 00:02:59,294 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-29 00:02:59,302 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [679774115] [2021-10-29 00:02:59,302 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-29 00:02:59,302 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 00:02:59,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e587ca32-b732-4af4-8510-f84c93de67db/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-29 00:02:59,305 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e587ca32-b732-4af4-8510-f84c93de67db/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-29 00:02:59,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e587ca32-b732-4af4-8510-f84c93de67db/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-29 00:02:59,696 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-10-29 00:02:59,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-29 00:02:59,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 63 conjunts are in the unsatisfiable core [2021-10-29 00:02:59,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 00:04:15,517 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 38 proven. 118 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-10-29 00:04:15,518 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-29 00:04:15,518 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795918785] [2021-10-29 00:04:15,518 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-29 00:04:15,518 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679774115] [2021-10-29 00:04:15,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679774115] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-29 00:04:15,518 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-29 00:04:15,518 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2021-10-29 00:04:15,518 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058768236] [2021-10-29 00:04:15,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-10-29 00:04:15,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-29 00:04:15,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-10-29 00:04:15,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=738, Unknown=24, NotChecked=0, Total=930 [2021-10-29 00:04:15,523 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand has 31 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 23 states have internal predecessors, (43), 4 states have call successors, (4), 2 states have call predecessors, (4), 7 states have return successors, (7), 7 states have call predecessors, (7), 3 states have call successors, (7) [2021-10-29 00:06:45,747 WARN L207 SmtUtils]: Spent 7.04 s on a formula simplification. DAG size of input: 81 DAG size of output: 78 [2021-10-29 00:07:37,666 WARN L207 SmtUtils]: Spent 6.34 s on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2021-10-29 00:08:10,288 WARN L207 SmtUtils]: Spent 7.36 s on a formula simplification. DAG size of input: 67 DAG size of output: 66 [2021-10-29 00:09:26,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 00:09:26,172 INFO L93 Difference]: Finished difference Result 62 states and 66 transitions. [2021-10-29 00:09:26,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-10-29 00:09:26,173 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 23 states have internal predecessors, (43), 4 states have call successors, (4), 2 states have call predecessors, (4), 7 states have return successors, (7), 7 states have call predecessors, (7), 3 states have call successors, (7) Word has length 75 [2021-10-29 00:09:26,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 00:09:26,174 INFO L225 Difference]: With dead ends: 62 [2021-10-29 00:09:26,175 INFO L226 Difference]: Without dead ends: 59 [2021-10-29 00:09:26,176 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 239.2s TimeCoverageRelationStatistics Valid=404, Invalid=1789, Unknown=63, NotChecked=0, Total=2256 [2021-10-29 00:09:26,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-10-29 00:09:26,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 56. [2021-10-29 00:09:26,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 44 states have (on average 1.0454545454545454) internal successors, (46), 44 states have internal predecessors, (46), 3 states have call successors, (3), 2 states have call predecessors, (3), 8 states have return successors, (9), 9 states have call predecessors, (9), 2 states have call successors, (9) [2021-10-29 00:09:26,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2021-10-29 00:09:26,183 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 75 [2021-10-29 00:09:26,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 00:09:26,183 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2021-10-29 00:09:26,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 23 states have internal predecessors, (43), 4 states have call successors, (4), 2 states have call predecessors, (4), 7 states have return successors, (7), 7 states have call predecessors, (7), 3 states have call successors, (7) [2021-10-29 00:09:26,184 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2021-10-29 00:09:26,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-10-29 00:09:26,186 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 00:09:26,186 INFO L513 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1] [2021-10-29 00:09:26,213 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e587ca32-b732-4af4-8510-f84c93de67db/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-10-29 00:09:26,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e587ca32-b732-4af4-8510-f84c93de67db/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 00:09:26,392 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting factErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [factErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-10-29 00:09:26,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 00:09:26,392 INFO L85 PathProgramCache]: Analyzing trace with hash -13156912, now seen corresponding path program 7 times [2021-10-29 00:09:26,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-29 00:09:26,392 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19256659] [2021-10-29 00:09:26,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 00:09:26,393 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 00:09:26,449 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-29 00:09:26,463 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [868303289] [2021-10-29 00:09:26,463 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-29 00:09:26,463 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 00:09:26,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e587ca32-b732-4af4-8510-f84c93de67db/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-29 00:09:26,472 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e587ca32-b732-4af4-8510-f84c93de67db/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-29 00:09:26,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e587ca32-b732-4af4-8510-f84c93de67db/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-29 00:09:26,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:09:26,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 65 conjunts are in the unsatisfiable core [2021-10-29 00:09:26,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 00:09:39,782 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 85 proven. 184 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-10-29 00:09:39,783 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-29 00:09:39,783 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19256659] [2021-10-29 00:09:39,783 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-29 00:09:39,783 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868303289] [2021-10-29 00:09:39,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868303289] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-29 00:09:39,783 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-29 00:09:39,783 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2021-10-29 00:09:39,783 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548666815] [2021-10-29 00:09:39,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-10-29 00:09:39,784 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-29 00:09:39,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-10-29 00:09:39,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=791, Unknown=1, NotChecked=0, Total=930 [2021-10-29 00:09:39,785 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand has 31 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 23 states have internal predecessors, (50), 4 states have call successors, (5), 1 states have call predecessors, (5), 8 states have return successors, (8), 8 states have call predecessors, (8), 3 states have call successors, (8) [2021-10-29 00:10:06,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 00:10:06,843 INFO L93 Difference]: Finished difference Result 67 states and 71 transitions. [2021-10-29 00:10:06,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-29 00:10:06,844 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 23 states have internal predecessors, (50), 4 states have call successors, (5), 1 states have call predecessors, (5), 8 states have return successors, (8), 8 states have call predecessors, (8), 3 states have call successors, (8) Word has length 95 [2021-10-29 00:10:06,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 00:10:06,845 INFO L225 Difference]: With dead ends: 67 [2021-10-29 00:10:06,845 INFO L226 Difference]: Without dead ends: 64 [2021-10-29 00:10:06,847 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 22.9s TimeCoverageRelationStatistics Valid=252, Invalid=1469, Unknown=1, NotChecked=0, Total=1722 [2021-10-29 00:10:06,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-10-29 00:10:06,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 61. [2021-10-29 00:10:06,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 48 states have (on average 1.0416666666666667) internal successors, (50), 48 states have internal predecessors, (50), 3 states have call successors, (3), 2 states have call predecessors, (3), 9 states have return successors, (10), 10 states have call predecessors, (10), 2 states have call successors, (10) [2021-10-29 00:10:06,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 63 transitions. [2021-10-29 00:10:06,854 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 63 transitions. Word has length 95 [2021-10-29 00:10:06,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 00:10:06,854 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 63 transitions. [2021-10-29 00:10:06,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 23 states have internal predecessors, (50), 4 states have call successors, (5), 1 states have call predecessors, (5), 8 states have return successors, (8), 8 states have call predecessors, (8), 3 states have call successors, (8) [2021-10-29 00:10:06,854 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 63 transitions. [2021-10-29 00:10:06,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-10-29 00:10:06,857 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 00:10:06,857 INFO L513 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1] [2021-10-29 00:10:06,898 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e587ca32-b732-4af4-8510-f84c93de67db/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-29 00:10:07,074 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e587ca32-b732-4af4-8510-f84c93de67db/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-10-29 00:10:07,074 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting factErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [factErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-10-29 00:10:07,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 00:10:07,075 INFO L85 PathProgramCache]: Analyzing trace with hash -1225911632, now seen corresponding path program 8 times [2021-10-29 00:10:07,075 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-29 00:10:07,075 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2590727] [2021-10-29 00:10:07,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 00:10:07,075 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 00:10:07,087 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-29 00:10:07,087 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [692064507] [2021-10-29 00:10:07,087 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-29 00:10:07,087 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 00:10:07,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e587ca32-b732-4af4-8510-f84c93de67db/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-29 00:10:07,088 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e587ca32-b732-4af4-8510-f84c93de67db/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-29 00:10:07,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e587ca32-b732-4af4-8510-f84c93de67db/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-29 00:10:07,616 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-29 00:10:07,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-29 00:10:07,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 83 conjunts are in the unsatisfiable core [2021-10-29 00:10:07,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 00:10:37,645 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 99 proven. 231 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2021-10-29 00:10:37,646 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-29 00:10:37,646 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2590727] [2021-10-29 00:10:37,646 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-29 00:10:37,646 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692064507] [2021-10-29 00:10:37,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [692064507] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-29 00:10:37,646 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-29 00:10:37,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2021-10-29 00:10:37,647 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595536081] [2021-10-29 00:10:37,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-10-29 00:10:37,647 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-29 00:10:37,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-10-29 00:10:37,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=962, Unknown=6, NotChecked=0, Total=1122 [2021-10-29 00:10:37,649 INFO L87 Difference]: Start difference. First operand 61 states and 63 transitions. Second operand has 34 states, 33 states have (on average 1.6363636363636365) internal successors, (54), 25 states have internal predecessors, (54), 4 states have call successors, (5), 1 states have call predecessors, (5), 9 states have return successors, (9), 9 states have call predecessors, (9), 3 states have call successors, (9) [2021-10-29 00:11:12,465 WARN L207 SmtUtils]: Spent 8.70 s on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2021-10-29 00:11:42,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 00:11:42,156 INFO L93 Difference]: Finished difference Result 72 states and 76 transitions. [2021-10-29 00:11:42,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-10-29 00:11:42,157 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.6363636363636365) internal successors, (54), 25 states have internal predecessors, (54), 4 states have call successors, (5), 1 states have call predecessors, (5), 9 states have return successors, (9), 9 states have call predecessors, (9), 3 states have call successors, (9) Word has length 105 [2021-10-29 00:11:42,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 00:11:42,158 INFO L225 Difference]: With dead ends: 72 [2021-10-29 00:11:42,159 INFO L226 Difference]: Without dead ends: 69 [2021-10-29 00:11:42,160 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 59.0s TimeCoverageRelationStatistics Valid=280, Invalid=1780, Unknown=10, NotChecked=0, Total=2070 [2021-10-29 00:11:42,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-10-29 00:11:42,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 66. [2021-10-29 00:11:42,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 52 states have internal predecessors, (54), 3 states have call successors, (3), 2 states have call predecessors, (3), 10 states have return successors, (11), 11 states have call predecessors, (11), 2 states have call successors, (11) [2021-10-29 00:11:42,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2021-10-29 00:11:42,169 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 105 [2021-10-29 00:11:42,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 00:11:42,169 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2021-10-29 00:11:42,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 1.6363636363636365) internal successors, (54), 25 states have internal predecessors, (54), 4 states have call successors, (5), 1 states have call predecessors, (5), 9 states have return successors, (9), 9 states have call predecessors, (9), 3 states have call successors, (9) [2021-10-29 00:11:42,170 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2021-10-29 00:11:42,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-10-29 00:11:42,171 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 00:11:42,172 INFO L513 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1] [2021-10-29 00:11:42,197 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e587ca32-b732-4af4-8510-f84c93de67db/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-29 00:11:42,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e587ca32-b732-4af4-8510-f84c93de67db/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-10-29 00:11:42,380 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting factErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [factErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-10-29 00:11:42,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 00:11:42,380 INFO L85 PathProgramCache]: Analyzing trace with hash -2029647408, now seen corresponding path program 9 times [2021-10-29 00:11:42,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-29 00:11:42,380 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295958817] [2021-10-29 00:11:42,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 00:11:42,380 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 00:11:42,394 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-29 00:11:42,395 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [727575380] [2021-10-29 00:11:42,395 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-29 00:11:42,395 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 00:11:42,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e587ca32-b732-4af4-8510-f84c93de67db/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-29 00:11:42,404 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e587ca32-b732-4af4-8510-f84c93de67db/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-29 00:11:42,405 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e587ca32-b732-4af4-8510-f84c93de67db/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-29 00:11:43,433 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-10-29 00:11:43,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-29 00:11:43,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 71 conjunts are in the unsatisfiable core [2021-10-29 00:11:43,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 00:13:43,592 WARN L228 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e587ca32-b732-4af4-8510-f84c93de67db/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2021-10-29 00:13:43,593 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-29 00:13:43,593 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295958817] [2021-10-29 00:13:43,593 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-29 00:13:43,593 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727575380] [2021-10-29 00:13:43,593 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e587ca32-b732-4af4-8510-f84c93de67db/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") [2021-10-29 00:13:43,593 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-10-29 00:13:43,593 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-10-29 00:13:43,594 ERROR L172 FreeRefinementEngine]: Strategy CAMEL failed to provide any proof altough trace is infeasible [2021-10-29 00:13:43,594 INFO L627 BasicCegarLoop]: Counterexample might be feasible [2021-10-29 00:13:43,595 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e587ca32-b732-4af4-8510-f84c93de67db/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 101 [2021-10-29 00:13:43,601 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location factErr2ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-29 00:13:43,603 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location factErr0ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-29 00:13:43,603 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location factErr1ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-29 00:13:43,603 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location factErr3ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-29 00:13:43,610 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e587ca32-b732-4af4-8510-f84c93de67db/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-10-29 00:13:43,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e587ca32-b732-4af4-8510-f84c93de67db/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-10-29 00:13:43,807 INFO L731 BasicCegarLoop]: Path program histogram: [9, 2, 1, 1, 1] [2021-10-29 00:13:43,809 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-29 00:13:43,825 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.10 12:13:43 BoogieIcfgContainer [2021-10-29 00:13:43,825 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-29 00:13:43,826 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-29 00:13:43,826 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-29 00:13:43,826 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-29 00:13:43,826 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 12:01:24" (3/4) ... [2021-10-29 00:13:43,830 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-29 00:13:43,830 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-29 00:13:43,831 INFO L168 Benchmark]: Toolchain (without parser) took 740359.33 ms. Allocated memory was 90.2 MB in the beginning and 132.1 MB in the end (delta: 41.9 MB). Free memory was 54.4 MB in the beginning and 85.8 MB in the end (delta: -31.4 MB). Peak memory consumption was 10.1 MB. Max. memory is 16.1 GB. [2021-10-29 00:13:43,831 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 90.2 MB. Free memory is still 70.5 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-29 00:13:43,832 INFO L168 Benchmark]: CACSL2BoogieTranslator took 257.95 ms. Allocated memory was 90.2 MB in the beginning and 109.1 MB in the end (delta: 18.9 MB). Free memory was 54.3 MB in the beginning and 87.2 MB in the end (delta: -32.9 MB). Peak memory consumption was 7.8 MB. Max. memory is 16.1 GB. [2021-10-29 00:13:43,832 INFO L168 Benchmark]: Boogie Procedure Inliner took 35.86 ms. Allocated memory is still 109.1 MB. Free memory was 87.2 MB in the beginning and 86.1 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-29 00:13:43,832 INFO L168 Benchmark]: Boogie Preprocessor took 20.77 ms. Allocated memory is still 109.1 MB. Free memory was 86.1 MB in the beginning and 85.1 MB in the end (delta: 960.8 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-29 00:13:43,833 INFO L168 Benchmark]: RCFGBuilder took 391.48 ms. Allocated memory is still 109.1 MB. Free memory was 85.1 MB in the beginning and 76.3 MB in the end (delta: 8.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-29 00:13:43,833 INFO L168 Benchmark]: TraceAbstraction took 739640.90 ms. Allocated memory was 109.1 MB in the beginning and 132.1 MB in the end (delta: 23.1 MB). Free memory was 76.0 MB in the beginning and 86.9 MB in the end (delta: -10.9 MB). Peak memory consumption was 12.8 MB. Max. memory is 16.1 GB. [2021-10-29 00:13:43,834 INFO L168 Benchmark]: Witness Printer took 4.40 ms. Allocated memory is still 132.1 MB. Free memory was 86.9 MB in the beginning and 85.8 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-29 00:13:43,836 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 90.2 MB. Free memory is still 70.5 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 257.95 ms. Allocated memory was 90.2 MB in the beginning and 109.1 MB in the end (delta: 18.9 MB). Free memory was 54.3 MB in the beginning and 87.2 MB in the end (delta: -32.9 MB). Peak memory consumption was 7.8 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 35.86 ms. Allocated memory is still 109.1 MB. Free memory was 87.2 MB in the beginning and 86.1 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 20.77 ms. Allocated memory is still 109.1 MB. Free memory was 86.1 MB in the beginning and 85.1 MB in the end (delta: 960.8 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 391.48 ms. Allocated memory is still 109.1 MB. Free memory was 85.1 MB in the beginning and 76.3 MB in the end (delta: 8.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 739640.90 ms. Allocated memory was 109.1 MB in the beginning and 132.1 MB in the end (delta: 23.1 MB). Free memory was 76.0 MB in the beginning and 86.9 MB in the end (delta: -10.9 MB). Peak memory consumption was 12.8 MB. Max. memory is 16.1 GB. * Witness Printer took 4.40 ms. Allocated memory is still 132.1 MB. Free memory was 86.9 MB in the beginning and 85.8 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 20]: Unable to prove that integer overflow can never occur Unable to prove that integer overflow can never occur Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L26] int x = __VERIFIER_nondet_int(); [L27] COND FALSE !(x < 0) [L29] int y = __VERIFIER_nondet_int(); [L30] COND FALSE !(y < 0) [L32] int z = __VERIFIER_nondet_int(); [L33] CALL fact(x) [L18] COND TRUE x > 1 [L19] EXPR x - 1 [L19] CALL, EXPR fact(x - 1) [L18] COND TRUE x > 1 [L19] EXPR x - 1 [L19] CALL, EXPR fact(x - 1) [L18] COND TRUE x > 1 [L19] EXPR x - 1 [L19] CALL, EXPR fact(x - 1) [L18] COND TRUE x > 1 [L19] EXPR x - 1 [L19] CALL, EXPR fact(x - 1) [L18] COND TRUE x > 1 [L19] EXPR x - 1 [L19] CALL, EXPR fact(x - 1) [L18] COND TRUE x > 1 [L19] EXPR x - 1 [L19] CALL, EXPR fact(x - 1) [L18] COND TRUE x > 1 [L19] EXPR x - 1 [L19] CALL, EXPR fact(x - 1) [L18] COND TRUE x > 1 [L19] EXPR x - 1 [L19] CALL, EXPR fact(x - 1) [L18] COND TRUE x > 1 [L19] EXPR x - 1 [L19] CALL, EXPR fact(x - 1) [L18] COND TRUE x > 1 [L19] EXPR x - 1 [L19] CALL, EXPR fact(x - 1) [L18] COND FALSE !(x > 1) [L22] return 1; [L19] RET, EXPR fact(x - 1) [L19] int y = fact(x - 1); [L20] EXPR y * x [L20] return y * x; [L19] RET, EXPR fact(x - 1) [L19] int y = fact(x - 1); [L20] EXPR y * x [L20] return y * x; [L19] RET, EXPR fact(x - 1) [L19] int y = fact(x - 1); [L20] EXPR y * x [L20] return y * x; [L19] RET, EXPR fact(x - 1) [L19] int y = fact(x - 1); [L20] EXPR y * x [L20] return y * x; [L19] RET, EXPR fact(x - 1) [L19] int y = fact(x - 1); [L20] EXPR y * x [L20] return y * x; [L19] RET, EXPR fact(x - 1) [L19] int y = fact(x - 1); [L20] EXPR y * x [L20] return y * x; [L19] RET, EXPR fact(x - 1) [L19] int y = fact(x - 1); [L20] EXPR y * x [L20] return y * x; [L19] RET, EXPR fact(x - 1) [L19] int y = fact(x - 1); [L20] EXPR y * x [L20] return y * x; [L19] RET, EXPR fact(x - 1) [L19] int y = fact(x - 1); [L20] EXPR y * x [L20] return y * x; [L19] RET, EXPR fact(x - 1) [L19] int y = fact(x - 1); [L20] y * x - UnprovableResult [Line: 19]: Unable to prove that integer overflow can never occur Unable to prove that integer overflow can never occur Reason: Not analyzed. - UnprovableResult [Line: 19]: Unable to prove that integer overflow can never occur Unable to prove that integer overflow can never occur Reason: Not analyzed. - UnprovableResult [Line: 20]: Unable to prove that integer overflow can never occur Unable to prove that integer overflow can never occur Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 22 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 739.5s, OverallIterations: 14, TraceHistogramMax: 12, PathProgramHistogramMax: 9, EmptinessCheckTime: 0.0s, AutomataDifference: 475.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 142 SDtfs, 686 SDslu, 1117 SDs, 0 SdLazy, 4153 SolverSat, 289 SolverUnsat, 87 SolverUnknown, 0 SolverNotchecked, 223.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 691 GetRequests, 405 SyntacticMatches, 0 SemanticMatches, 286 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1264 ImplicationChecksByTransitivity, 367.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=66occurred in iteration=13, InterpolantAutomatonStates: 204, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 13 MinimizatonAttempts, 37 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 1.3s SatisfiabilityAnalysisTime, 257.7s InterpolantComputationTime, 711 NumberOfCodeBlocks, 701 NumberOfCodeBlocksAsserted, 47 NumberOfCheckSat, 593 ConstructedInterpolants, 93 QuantifiedInterpolants, 6857 SizeOfPredicates, 84 NumberOfNonLiveVariables, 1504 ConjunctsInSsa, 486 ConjunctsInUnsatCore, 13 InterpolantComputations, 3 PerfectInterpolantSequences, 907/1659 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 RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request...