./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/lcm2_unwindbound1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7e70badd Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_119932ce-e855-4ddc-a36a-e1951cf22ae2/bin/uautomizer-wIGwrQj20G/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_119932ce-e855-4ddc-a36a-e1951cf22ae2/bin/uautomizer-wIGwrQj20G/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_119932ce-e855-4ddc-a36a-e1951cf22ae2/bin/uautomizer-wIGwrQj20G/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_119932ce-e855-4ddc-a36a-e1951cf22ae2/bin/uautomizer-wIGwrQj20G/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/lcm2_unwindbound1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_119932ce-e855-4ddc-a36a-e1951cf22ae2/bin/uautomizer-wIGwrQj20G/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_119932ce-e855-4ddc-a36a-e1951cf22ae2/bin/uautomizer-wIGwrQj20G --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 87db985859a6b034137d18f88e4077536120341f1ad0cccc5267e9ee4379ce7a --- Real Ultimate output --- This is Ultimate 0.2.1-dev-7e70bad [2021-11-23 14:07:56,209 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 14:07:56,210 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 14:07:56,259 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 14:07:56,259 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 14:07:56,264 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 14:07:56,266 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 14:07:56,270 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 14:07:56,273 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 14:07:56,281 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 14:07:56,282 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 14:07:56,284 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 14:07:56,285 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 14:07:56,288 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 14:07:56,290 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 14:07:56,291 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 14:07:56,292 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 14:07:56,293 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 14:07:56,296 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 14:07:56,298 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 14:07:56,300 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 14:07:56,301 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 14:07:56,303 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 14:07:56,304 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 14:07:56,307 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 14:07:56,308 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 14:07:56,308 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 14:07:56,309 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 14:07:56,310 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 14:07:56,311 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 14:07:56,312 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 14:07:56,313 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 14:07:56,313 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 14:07:56,314 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 14:07:56,316 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 14:07:56,316 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 14:07:56,317 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 14:07:56,318 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 14:07:56,318 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 14:07:56,319 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 14:07:56,320 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 14:07:56,321 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_119932ce-e855-4ddc-a36a-e1951cf22ae2/bin/uautomizer-wIGwrQj20G/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-23 14:07:56,353 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 14:07:56,354 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 14:07:56,354 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 14:07:56,355 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 14:07:56,356 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-23 14:07:56,372 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-23 14:07:56,373 INFO L138 SettingsManager]: * Use SBE=true [2021-11-23 14:07:56,373 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 14:07:56,374 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 14:07:56,374 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 14:07:56,374 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 14:07:56,375 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 14:07:56,375 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 14:07:56,376 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 14:07:56,376 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 14:07:56,377 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 14:07:56,377 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 14:07:56,377 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 14:07:56,378 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 14:07:56,378 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 14:07:56,379 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 14:07:56,379 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 14:07:56,380 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 14:07:56,380 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 14:07:56,381 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 14:07:56,381 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 14:07:56,381 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-23 14:07:56,382 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 14:07:56,382 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-23 14:07:56,383 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-23 14:07:56,383 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 14:07:56,384 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 14:07:56,384 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_119932ce-e855-4ddc-a36a-e1951cf22ae2/bin/uautomizer-wIGwrQj20G/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_119932ce-e855-4ddc-a36a-e1951cf22ae2/bin/uautomizer-wIGwrQj20G Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 87db985859a6b034137d18f88e4077536120341f1ad0cccc5267e9ee4379ce7a [2021-11-23 14:07:56,686 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 14:07:56,724 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 14:07:56,727 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 14:07:56,729 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 14:07:56,729 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 14:07:56,731 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_119932ce-e855-4ddc-a36a-e1951cf22ae2/bin/uautomizer-wIGwrQj20G/../../sv-benchmarks/c/nla-digbench-scaling/lcm2_unwindbound1.c [2021-11-23 14:07:56,814 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_119932ce-e855-4ddc-a36a-e1951cf22ae2/bin/uautomizer-wIGwrQj20G/data/fe31dad4e/f34d9d7e1a694a48a65b516950b90228/FLAGd0415fe06 [2021-11-23 14:07:57,346 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 14:07:57,347 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_119932ce-e855-4ddc-a36a-e1951cf22ae2/sv-benchmarks/c/nla-digbench-scaling/lcm2_unwindbound1.c [2021-11-23 14:07:57,354 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_119932ce-e855-4ddc-a36a-e1951cf22ae2/bin/uautomizer-wIGwrQj20G/data/fe31dad4e/f34d9d7e1a694a48a65b516950b90228/FLAGd0415fe06 [2021-11-23 14:07:57,704 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_119932ce-e855-4ddc-a36a-e1951cf22ae2/bin/uautomizer-wIGwrQj20G/data/fe31dad4e/f34d9d7e1a694a48a65b516950b90228 [2021-11-23 14:07:57,707 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 14:07:57,709 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 14:07:57,714 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 14:07:57,714 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 14:07:57,718 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 14:07:57,719 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:07:57" (1/1) ... [2021-11-23 14:07:57,721 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@57d40f21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:07:57, skipping insertion in model container [2021-11-23 14:07:57,721 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:07:57" (1/1) ... [2021-11-23 14:07:57,730 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 14:07:57,758 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 14:07:57,928 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_119932ce-e855-4ddc-a36a-e1951cf22ae2/sv-benchmarks/c/nla-digbench-scaling/lcm2_unwindbound1.c[537,550] [2021-11-23 14:07:57,956 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 14:07:57,976 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 14:07:58,000 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_119932ce-e855-4ddc-a36a-e1951cf22ae2/sv-benchmarks/c/nla-digbench-scaling/lcm2_unwindbound1.c[537,550] [2021-11-23 14:07:58,025 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 14:07:58,044 INFO L208 MainTranslator]: Completed translation [2021-11-23 14:07:58,044 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:07:58 WrapperNode [2021-11-23 14:07:58,045 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 14:07:58,046 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 14:07:58,046 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 14:07:58,046 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 14:07:58,055 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:07:58" (1/1) ... [2021-11-23 14:07:58,068 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:07:58" (1/1) ... [2021-11-23 14:07:58,100 INFO L137 Inliner]: procedures = 14, calls = 20, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 77 [2021-11-23 14:07:58,101 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 14:07:58,102 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 14:07:58,102 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 14:07:58,103 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 14:07:58,113 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:07:58" (1/1) ... [2021-11-23 14:07:58,113 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:07:58" (1/1) ... [2021-11-23 14:07:58,129 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:07:58" (1/1) ... [2021-11-23 14:07:58,130 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:07:58" (1/1) ... [2021-11-23 14:07:58,134 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:07:58" (1/1) ... [2021-11-23 14:07:58,142 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:07:58" (1/1) ... [2021-11-23 14:07:58,148 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:07:58" (1/1) ... [2021-11-23 14:07:58,156 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 14:07:58,157 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 14:07:58,159 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 14:07:58,159 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 14:07:58,160 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:07:58" (1/1) ... [2021-11-23 14:07:58,170 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 14:07:58,184 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_119932ce-e855-4ddc-a36a-e1951cf22ae2/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 14:07:58,202 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_119932ce-e855-4ddc-a36a-e1951cf22ae2/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 14:07:58,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_119932ce-e855-4ddc-a36a-e1951cf22ae2/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 14:07:58,262 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 14:07:58,262 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 14:07:58,262 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 14:07:58,263 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 14:07:58,328 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 14:07:58,330 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 14:07:58,498 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 14:07:58,504 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 14:07:58,505 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-23 14:07:58,506 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:07:58 BoogieIcfgContainer [2021-11-23 14:07:58,507 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 14:07:58,509 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 14:07:58,509 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 14:07:58,515 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 14:07:58,515 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:07:57" (1/3) ... [2021-11-23 14:07:58,516 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@481bed27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:07:58, skipping insertion in model container [2021-11-23 14:07:58,516 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:07:58" (2/3) ... [2021-11-23 14:07:58,516 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@481bed27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:07:58, skipping insertion in model container [2021-11-23 14:07:58,516 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:07:58" (3/3) ... [2021-11-23 14:07:58,518 INFO L111 eAbstractionObserver]: Analyzing ICFG lcm2_unwindbound1.c [2021-11-23 14:07:58,523 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 14:07:58,524 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-23 14:07:58,579 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 14:07:58,587 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 14:07:58,588 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-23 14:07:58,603 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:07:58,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-23 14:07:58,610 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:07:58,610 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:07:58,611 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:07:58,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:07:58,626 INFO L85 PathProgramCache]: Analyzing trace with hash -173754057, now seen corresponding path program 1 times [2021-11-23 14:07:58,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:07:58,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129083937] [2021-11-23 14:07:58,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:07:58,641 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:07:58,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:07:58,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:07:58,802 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:07:58,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129083937] [2021-11-23 14:07:58,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129083937] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:07:58,804 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 14:07:58,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 14:07:58,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179969567] [2021-11-23 14:07:58,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:07:58,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-23 14:07:58,813 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:07:58,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-23 14:07:58,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 14:07:58,850 INFO L87 Difference]: Start difference. First operand has 26 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:07:58,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:07:58,869 INFO L93 Difference]: Finished difference Result 49 states and 66 transitions. [2021-11-23 14:07:58,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-23 14:07:58,872 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-23 14:07:58,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:07:58,881 INFO L225 Difference]: With dead ends: 49 [2021-11-23 14:07:58,882 INFO L226 Difference]: Without dead ends: 22 [2021-11-23 14:07:58,885 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 14:07:58,890 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 14:07:58,892 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 14:07:58,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-11-23 14:07:58,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-11-23 14:07:58,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:07:58,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2021-11-23 14:07:58,930 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 14 [2021-11-23 14:07:58,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:07:58,931 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2021-11-23 14:07:58,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:07:58,932 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2021-11-23 14:07:58,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-23 14:07:58,933 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:07:58,933 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:07:58,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 14:07:58,934 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:07:58,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:07:58,935 INFO L85 PathProgramCache]: Analyzing trace with hash -1061593710, now seen corresponding path program 1 times [2021-11-23 14:07:58,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:07:58,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751415988] [2021-11-23 14:07:58,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:07:58,937 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:07:58,963 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 14:07:58,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1871593849] [2021-11-23 14:07:58,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:07:58,964 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:07:58,964 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_119932ce-e855-4ddc-a36a-e1951cf22ae2/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 14:07:58,966 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_119932ce-e855-4ddc-a36a-e1951cf22ae2/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 14:07:59,000 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_119932ce-e855-4ddc-a36a-e1951cf22ae2/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 14:07:59,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:07:59,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-23 14:07:59,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 14:07:59,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:07:59,498 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 14:07:59,498 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:07:59,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751415988] [2021-11-23 14:07:59,499 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 14:07:59,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871593849] [2021-11-23 14:07:59,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871593849] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:07:59,500 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 14:07:59,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 14:07:59,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573247423] [2021-11-23 14:07:59,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:07:59,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 14:07:59,502 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:07:59,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 14:07:59,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 14:07:59,503 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:07:59,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:07:59,596 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2021-11-23 14:07:59,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 14:07:59,597 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-23 14:07:59,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:07:59,598 INFO L225 Difference]: With dead ends: 38 [2021-11-23 14:07:59,598 INFO L226 Difference]: Without dead ends: 31 [2021-11-23 14:07:59,599 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 14:07:59,601 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 13 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 14:07:59,604 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 52 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 14:07:59,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-11-23 14:07:59,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 27. [2021-11-23 14:07:59,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 25 states have (on average 1.16) internal successors, (29), 26 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:07:59,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2021-11-23 14:07:59,611 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 14 [2021-11-23 14:07:59,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:07:59,612 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2021-11-23 14:07:59,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:07:59,612 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2021-11-23 14:07:59,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-23 14:07:59,613 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:07:59,613 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:07:59,649 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_119932ce-e855-4ddc-a36a-e1951cf22ae2/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 14:07:59,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_119932ce-e855-4ddc-a36a-e1951cf22ae2/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:07:59,814 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:07:59,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:07:59,815 INFO L85 PathProgramCache]: Analyzing trace with hash 142081533, now seen corresponding path program 1 times [2021-11-23 14:07:59,815 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:07:59,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709600293] [2021-11-23 14:07:59,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:07:59,816 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:07:59,839 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 14:07:59,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1035843463] [2021-11-23 14:07:59,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:07:59,844 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:07:59,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_119932ce-e855-4ddc-a36a-e1951cf22ae2/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 14:07:59,845 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_119932ce-e855-4ddc-a36a-e1951cf22ae2/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 14:07:59,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_119932ce-e855-4ddc-a36a-e1951cf22ae2/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 14:07:59,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:07:59,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 14:07:59,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 14:07:59,976 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:07:59,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 14:08:00,035 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:08:00,036 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:08:00,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709600293] [2021-11-23 14:08:00,036 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 14:08:00,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035843463] [2021-11-23 14:08:00,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035843463] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 14:08:00,037 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 14:08:00,037 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-11-23 14:08:00,037 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985877655] [2021-11-23 14:08:00,038 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 14:08:00,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 14:08:00,039 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:08:00,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 14:08:00,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 14:08:00,040 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:08:00,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:08:00,065 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2021-11-23 14:08:00,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 14:08:00,066 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-23 14:08:00,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:08:00,067 INFO L225 Difference]: With dead ends: 34 [2021-11-23 14:08:00,067 INFO L226 Difference]: Without dead ends: 22 [2021-11-23 14:08:00,068 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-23 14:08:00,070 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 13 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 14:08:00,071 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 45 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 14:08:00,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-11-23 14:08:00,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-11-23 14:08:00,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.0476190476190477) internal successors, (22), 21 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:08:00,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2021-11-23 14:08:00,076 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2021-11-23 14:08:00,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:08:00,077 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2021-11-23 14:08:00,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:08:00,077 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2021-11-23 14:08:00,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-23 14:08:00,078 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:08:00,078 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:08:00,128 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_119932ce-e855-4ddc-a36a-e1951cf22ae2/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 14:08:00,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_119932ce-e855-4ddc-a36a-e1951cf22ae2/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-11-23 14:08:00,303 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:08:00,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:08:00,304 INFO L85 PathProgramCache]: Analyzing trace with hash 109523563, now seen corresponding path program 1 times [2021-11-23 14:08:00,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:08:00,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654155952] [2021-11-23 14:08:00,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:08:00,305 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:08:00,323 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 14:08:00,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [974142659] [2021-11-23 14:08:00,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:08:00,328 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:08:00,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_119932ce-e855-4ddc-a36a-e1951cf22ae2/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 14:08:00,332 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_119932ce-e855-4ddc-a36a-e1951cf22ae2/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 14:08:00,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_119932ce-e855-4ddc-a36a-e1951cf22ae2/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process