./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/ps2-ll_valuebound2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f8e1c903 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23c2829a-d39a-41ab-8a3b-9758de73a49a/bin/uautomizer-IVEQpCNsaX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23c2829a-d39a-41ab-8a3b-9758de73a49a/bin/uautomizer-IVEQpCNsaX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23c2829a-d39a-41ab-8a3b-9758de73a49a/bin/uautomizer-IVEQpCNsaX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23c2829a-d39a-41ab-8a3b-9758de73a49a/bin/uautomizer-IVEQpCNsaX/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/ps2-ll_valuebound2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23c2829a-d39a-41ab-8a3b-9758de73a49a/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23c2829a-d39a-41ab-8a3b-9758de73a49a/bin/uautomizer-IVEQpCNsaX --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 5211c9fa82ede95ab74fc9c54718f437923c350e1c105ec6d7fa45c8b49537a3 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-f8e1c90 [2021-11-09 10:35:31,063 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-09 10:35:31,065 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-09 10:35:31,112 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-09 10:35:31,121 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-09 10:35:31,123 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-09 10:35:31,128 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-09 10:35:31,136 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-09 10:35:31,141 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-09 10:35:31,143 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-09 10:35:31,145 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-09 10:35:31,149 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-09 10:35:31,151 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-09 10:35:31,161 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-09 10:35:31,164 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-09 10:35:31,167 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-09 10:35:31,173 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-09 10:35:31,176 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-09 10:35:31,179 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-09 10:35:31,187 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-09 10:35:31,196 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-09 10:35:31,198 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-09 10:35:31,200 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-09 10:35:31,202 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-09 10:35:31,209 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-09 10:35:31,213 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-09 10:35:31,214 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-09 10:35:31,217 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-09 10:35:31,218 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-09 10:35:31,220 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-09 10:35:31,222 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-09 10:35:31,223 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-09 10:35:31,226 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-09 10:35:31,227 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-09 10:35:31,230 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-09 10:35:31,230 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-09 10:35:31,232 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-09 10:35:31,233 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-09 10:35:31,233 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-09 10:35:31,234 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-09 10:35:31,235 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-09 10:35:31,237 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23c2829a-d39a-41ab-8a3b-9758de73a49a/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-09 10:35:31,299 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-09 10:35:31,302 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-09 10:35:31,303 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-09 10:35:31,304 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-09 10:35:31,310 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-09 10:35:31,310 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-09 10:35:31,311 INFO L138 SettingsManager]: * Use SBE=true [2021-11-09 10:35:31,311 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-09 10:35:31,311 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-09 10:35:31,312 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-09 10:35:31,314 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-09 10:35:31,315 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-09 10:35:31,315 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-09 10:35:31,315 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-09 10:35:31,316 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-09 10:35:31,316 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-09 10:35:31,316 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-09 10:35:31,317 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-09 10:35:31,317 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-09 10:35:31,317 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-09 10:35:31,318 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-09 10:35:31,318 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-09 10:35:31,319 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 10:35:31,319 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-09 10:35:31,319 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-09 10:35:31,320 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-09 10:35:31,320 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-09 10:35:31,320 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-09 10:35:31,321 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-09 10:35:31,324 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-09 10:35:31,324 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-09 10:35:31,324 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-09 10:35:31,325 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_23c2829a-d39a-41ab-8a3b-9758de73a49a/bin/uautomizer-IVEQpCNsaX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23c2829a-d39a-41ab-8a3b-9758de73a49a/bin/uautomizer-IVEQpCNsaX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5211c9fa82ede95ab74fc9c54718f437923c350e1c105ec6d7fa45c8b49537a3 [2021-11-09 10:35:31,654 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-09 10:35:31,697 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-09 10:35:31,700 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-09 10:35:31,702 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-09 10:35:31,703 INFO L275 PluginConnector]: CDTParser initialized [2021-11-09 10:35:31,705 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23c2829a-d39a-41ab-8a3b-9758de73a49a/bin/uautomizer-IVEQpCNsaX/../../sv-benchmarks/c/nla-digbench-scaling/ps2-ll_valuebound2.c [2021-11-09 10:35:31,798 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23c2829a-d39a-41ab-8a3b-9758de73a49a/bin/uautomizer-IVEQpCNsaX/data/a8c47d12c/fd5e119cc111479aad109321c1ff2a94/FLAG03758ff3f [2021-11-09 10:35:32,352 INFO L306 CDTParser]: Found 1 translation units. [2021-11-09 10:35:32,354 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23c2829a-d39a-41ab-8a3b-9758de73a49a/sv-benchmarks/c/nla-digbench-scaling/ps2-ll_valuebound2.c [2021-11-09 10:35:32,368 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23c2829a-d39a-41ab-8a3b-9758de73a49a/bin/uautomizer-IVEQpCNsaX/data/a8c47d12c/fd5e119cc111479aad109321c1ff2a94/FLAG03758ff3f [2021-11-09 10:35:32,702 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23c2829a-d39a-41ab-8a3b-9758de73a49a/bin/uautomizer-IVEQpCNsaX/data/a8c47d12c/fd5e119cc111479aad109321c1ff2a94 [2021-11-09 10:35:32,705 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-09 10:35:32,707 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-09 10:35:32,709 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-09 10:35:32,709 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-09 10:35:32,714 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-09 10:35:32,715 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 10:35:32" (1/1) ... [2021-11-09 10:35:32,716 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73fcb437 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:35:32, skipping insertion in model container [2021-11-09 10:35:32,717 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 10:35:32" (1/1) ... [2021-11-09 10:35:32,726 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-09 10:35:32,747 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-09 10:35:32,981 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23c2829a-d39a-41ab-8a3b-9758de73a49a/sv-benchmarks/c/nla-digbench-scaling/ps2-ll_valuebound2.c[454,467] [2021-11-09 10:35:33,012 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 10:35:33,028 INFO L203 MainTranslator]: Completed pre-run [2021-11-09 10:35:33,057 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23c2829a-d39a-41ab-8a3b-9758de73a49a/sv-benchmarks/c/nla-digbench-scaling/ps2-ll_valuebound2.c[454,467] [2021-11-09 10:35:33,071 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 10:35:33,089 INFO L208 MainTranslator]: Completed translation [2021-11-09 10:35:33,090 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:35:33 WrapperNode [2021-11-09 10:35:33,091 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-09 10:35:33,095 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-09 10:35:33,096 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-09 10:35:33,096 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-09 10:35:33,110 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:35:33" (1/1) ... [2021-11-09 10:35:33,121 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:35:33" (1/1) ... [2021-11-09 10:35:33,150 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-09 10:35:33,152 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-09 10:35:33,152 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-09 10:35:33,152 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-09 10:35:33,162 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:35:33" (1/1) ... [2021-11-09 10:35:33,162 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:35:33" (1/1) ... [2021-11-09 10:35:33,176 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:35:33" (1/1) ... [2021-11-09 10:35:33,176 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:35:33" (1/1) ... [2021-11-09 10:35:33,180 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:35:33" (1/1) ... [2021-11-09 10:35:33,185 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:35:33" (1/1) ... [2021-11-09 10:35:33,186 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:35:33" (1/1) ... [2021-11-09 10:35:33,196 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-09 10:35:33,197 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-09 10:35:33,198 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-09 10:35:33,198 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-09 10:35:33,200 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:35:33" (1/1) ... [2021-11-09 10:35:33,210 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 10:35:33,225 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23c2829a-d39a-41ab-8a3b-9758de73a49a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:35:33,245 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23c2829a-d39a-41ab-8a3b-9758de73a49a/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-09 10:35:33,269 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23c2829a-d39a-41ab-8a3b-9758de73a49a/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-09 10:35:33,318 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-09 10:35:33,319 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-09 10:35:33,319 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-09 10:35:33,319 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-09 10:35:33,581 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-09 10:35:33,581 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2021-11-09 10:35:33,583 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 10:35:33 BoogieIcfgContainer [2021-11-09 10:35:33,584 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-09 10:35:33,586 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-09 10:35:33,587 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-09 10:35:33,591 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-09 10:35:33,591 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 10:35:32" (1/3) ... [2021-11-09 10:35:33,592 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b963646 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 10:35:33, skipping insertion in model container [2021-11-09 10:35:33,593 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:35:33" (2/3) ... [2021-11-09 10:35:33,593 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b963646 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 10:35:33, skipping insertion in model container [2021-11-09 10:35:33,594 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 10:35:33" (3/3) ... [2021-11-09 10:35:33,595 INFO L111 eAbstractionObserver]: Analyzing ICFG ps2-ll_valuebound2.c [2021-11-09 10:35:33,602 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-09 10:35:33,603 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-09 10:35:33,665 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-09 10:35:33,675 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 [2021-11-09 10:35:33,675 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-09 10:35:33,694 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 16 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) [2021-11-09 10:35:33,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-09 10:35:33,701 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:35:33,702 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:35:33,703 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:35:33,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:35:33,710 INFO L85 PathProgramCache]: Analyzing trace with hash 1804972333, now seen corresponding path program 1 times [2021-11-09 10:35:33,722 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:35:33,722 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697314661] [2021-11-09 10:35:33,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:35:33,724 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:35:33,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:35:34,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:35:34,001 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:35:34,002 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697314661] [2021-11-09 10:35:34,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697314661] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:35:34,003 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:35:34,004 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-09 10:35:34,006 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692435224] [2021-11-09 10:35:34,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-09 10:35:34,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:35:34,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-09 10:35:34,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-09 10:35:34,032 INFO L87 Difference]: Start difference. First operand has 17 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 16 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) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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) [2021-11-09 10:35:34,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:35:34,061 INFO L93 Difference]: Finished difference Result 31 states and 40 transitions. [2021-11-09 10:35:34,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-09 10:35:34,063 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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 7 [2021-11-09 10:35:34,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:35:34,073 INFO L225 Difference]: With dead ends: 31 [2021-11-09 10:35:34,074 INFO L226 Difference]: Without dead ends: 13 [2021-11-09 10:35:34,079 INFO L786 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 [2021-11-09 10:35:34,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-11-09 10:35:34,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-11-09 10:35:34,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 12 states have internal predecessors, (13), 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) [2021-11-09 10:35:34,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2021-11-09 10:35:34,145 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 7 [2021-11-09 10:35:34,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:35:34,146 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2021-11-09 10:35:34,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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) [2021-11-09 10:35:34,147 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2021-11-09 10:35:34,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-09 10:35:34,148 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:35:34,149 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:35:34,149 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-09 10:35:34,150 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:35:34,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:35:34,161 INFO L85 PathProgramCache]: Analyzing trace with hash 1806819375, now seen corresponding path program 1 times [2021-11-09 10:35:34,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:35:34,161 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274834074] [2021-11-09 10:35:34,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:35:34,162 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:35:34,214 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 10:35:34,214 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1091246654] [2021-11-09 10:35:34,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:35:34,215 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:35:34,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23c2829a-d39a-41ab-8a3b-9758de73a49a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:35:34,219 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23c2829a-d39a-41ab-8a3b-9758de73a49a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:35:34,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23c2829a-d39a-41ab-8a3b-9758de73a49a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-09 10:35:34,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:35:34,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-09 10:35:34,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:35:34,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:35:34,473 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:35:34,473 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274834074] [2021-11-09 10:35:34,474 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 10:35:34,474 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091246654] [2021-11-09 10:35:34,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091246654] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:35:34,475 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:35:34,475 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 10:35:34,477 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121418745] [2021-11-09 10:35:34,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 10:35:34,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:35:34,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 10:35:34,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:35:34,481 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 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) [2021-11-09 10:35:34,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:35:34,553 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2021-11-09 10:35:34,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-09 10:35:34,554 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 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 7 [2021-11-09 10:35:34,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:35:34,555 INFO L225 Difference]: With dead ends: 23 [2021-11-09 10:35:34,556 INFO L226 Difference]: Without dead ends: 17 [2021-11-09 10:35:34,559 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:35:34,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-11-09 10:35:34,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2021-11-09 10:35:34,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 15 states have internal predecessors, (16), 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) [2021-11-09 10:35:34,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2021-11-09 10:35:34,570 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 7 [2021-11-09 10:35:34,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:35:34,570 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2021-11-09 10:35:34,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 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) [2021-11-09 10:35:34,572 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2021-11-09 10:35:34,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-09 10:35:34,573 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:35:34,574 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:35:34,623 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23c2829a-d39a-41ab-8a3b-9758de73a49a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-09 10:35:34,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23c2829a-d39a-41ab-8a3b-9758de73a49a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:35:34,801 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:35:34,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:35:34,802 INFO L85 PathProgramCache]: Analyzing trace with hash -1864186656, now seen corresponding path program 1 times [2021-11-09 10:35:34,802 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:35:34,803 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772624829] [2021-11-09 10:35:34,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:35:34,803 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:35:34,822 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 10:35:34,822 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1413892512] [2021-11-09 10:35:34,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:35:34,823 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:35:34,823 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23c2829a-d39a-41ab-8a3b-9758de73a49a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:35:34,825 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23c2829a-d39a-41ab-8a3b-9758de73a49a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:35:34,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23c2829a-d39a-41ab-8a3b-9758de73a49a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-09 10:35:34,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:35:34,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-09 10:35:34,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:35:35,110 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:35:35,110 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:35:35,110 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772624829] [2021-11-09 10:35:35,111 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 10:35:35,111 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413892512] [2021-11-09 10:35:35,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413892512] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:35:35,116 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 10:35:35,117 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-11-09 10:35:35,117 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300869576] [2021-11-09 10:35:35,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 10:35:35,118 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:35:35,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 10:35:35,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:35:35,120 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 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) [2021-11-09 10:35:35,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:35:35,211 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2021-11-09 10:35:35,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 10:35:35,213 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 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 10 [2021-11-09 10:35:35,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:35:35,214 INFO L225 Difference]: With dead ends: 26 [2021-11-09 10:35:35,215 INFO L226 Difference]: Without dead ends: 20 [2021-11-09 10:35:35,215 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-09 10:35:35,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-11-09 10:35:35,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2021-11-09 10:35:35,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 18 states have internal predecessors, (19), 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) [2021-11-09 10:35:35,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2021-11-09 10:35:35,224 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 10 [2021-11-09 10:35:35,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:35:35,224 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2021-11-09 10:35:35,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 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) [2021-11-09 10:35:35,225 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2021-11-09 10:35:35,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-09 10:35:35,225 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:35:35,226 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2021-11-09 10:35:35,278 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23c2829a-d39a-41ab-8a3b-9758de73a49a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-09 10:35:35,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23c2829a-d39a-41ab-8a3b-9758de73a49a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-11-09 10:35:35,444 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:35:35,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:35:35,445 INFO L85 PathProgramCache]: Analyzing trace with hash -2052598129, now seen corresponding path program 2 times [2021-11-09 10:35:35,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:35:35,445 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184511034] [2021-11-09 10:35:35,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:35:35,446 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:35:35,473 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 10:35:35,473 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [728738038] [2021-11-09 10:35:35,473 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 10:35:35,474 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:35:35,474 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23c2829a-d39a-41ab-8a3b-9758de73a49a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:35:35,475 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23c2829a-d39a-41ab-8a3b-9758de73a49a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:35:35,491 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23c2829a-d39a-41ab-8a3b-9758de73a49a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-09 10:35:35,572 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 10:35:35,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:35:35,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-09 10:35:35,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:35:35,814 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:35:35,814 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:35:35,814 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184511034] [2021-11-09 10:35:35,815 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 10:35:35,815 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728738038] [2021-11-09 10:35:35,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728738038] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:35:35,815 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 10:35:35,815 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-11-09 10:35:35,816 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417626386] [2021-11-09 10:35:35,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 10:35:35,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:35:35,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 10:35:35,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-09 10:35:35,818 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 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) [2021-11-09 10:35:35,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:35:35,977 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2021-11-09 10:35:35,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-09 10:35:35,977 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 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 13 [2021-11-09 10:35:35,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:35:35,978 INFO L225 Difference]: With dead ends: 29 [2021-11-09 10:35:35,978 INFO L226 Difference]: Without dead ends: 23 [2021-11-09 10:35:35,979 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-09 10:35:35,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-11-09 10:35:35,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2021-11-09 10:35:35,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 20 states have (on average 1.1) 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) [2021-11-09 10:35:35,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2021-11-09 10:35:35,984 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 13 [2021-11-09 10:35:35,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:35:35,984 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2021-11-09 10:35:35,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 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) [2021-11-09 10:35:35,985 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2021-11-09 10:35:35,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-09 10:35:35,985 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:35:35,986 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1] [2021-11-09 10:35:36,023 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23c2829a-d39a-41ab-8a3b-9758de73a49a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-09 10:35:36,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23c2829a-d39a-41ab-8a3b-9758de73a49a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:35:36,209 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:35:36,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:35:36,210 INFO L85 PathProgramCache]: Analyzing trace with hash -1496534400, now seen corresponding path program 3 times [2021-11-09 10:35:36,210 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:35:36,210 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34669539] [2021-11-09 10:35:36,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:35:36,211 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:35:36,227 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 10:35:36,227 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1988272521] [2021-11-09 10:35:36,227 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 10:35:36,228 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:35:36,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23c2829a-d39a-41ab-8a3b-9758de73a49a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:35:36,229 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23c2829a-d39a-41ab-8a3b-9758de73a49a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:35:36,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23c2829a-d39a-41ab-8a3b-9758de73a49a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-09 10:35:36,313 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-09 10:35:36,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:35:36,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-09 10:35:36,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:35:36,470 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-09 10:35:36,471 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:35:36,471 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34669539] [2021-11-09 10:35:36,472 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 10:35:36,472 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988272521] [2021-11-09 10:35:36,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988272521] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:35:36,472 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 10:35:36,473 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-11-09 10:35:36,473 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922869428] [2021-11-09 10:35:36,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 10:35:36,474 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:35:36,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 10:35:36,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:35:36,475 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 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) [2021-11-09 10:35:36,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:35:36,529 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2021-11-09 10:35:36,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 10:35:36,530 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 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 16 [2021-11-09 10:35:36,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:35:36,530 INFO L225 Difference]: With dead ends: 22 [2021-11-09 10:35:36,531 INFO L226 Difference]: Without dead ends: 0 [2021-11-09 10:35:36,531 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-09 10:35:36,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-09 10:35:36,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-09 10:35:36,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:35:36,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-09 10:35:36,533 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 16 [2021-11-09 10:35:36,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:35:36,533 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-09 10:35:36,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 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) [2021-11-09 10:35:36,534 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-09 10:35:36,534 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-09 10:35:36,536 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-11-09 10:35:36,537 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-11-09 10:35:36,564 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23c2829a-d39a-41ab-8a3b-9758de73a49a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-09 10:35:36,738 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23c2829a-d39a-41ab-8a3b-9758de73a49a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:35:36,740 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-11-09 10:35:36,744 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-09 10:35:36,755 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-09 10:35:36,756 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-09 10:35:36,765 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-09 10:35:36,805 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-11-09 10:35:36,805 INFO L853 garLoopResultBuilder]: At program point L27-2(lines 27 36) the Hoare annotation is: (let ((.cse0 (= (+ ULTIMATE.start_main_~y~0 (* ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~y~0)) (* 2 ULTIMATE.start_main_~x~0)))) (or (and .cse0 (= 1 ULTIMATE.start___VERIFIER_assert_~cond)) (and (= ULTIMATE.start_main_~y~0 0) .cse0))) [2021-11-09 10:35:36,806 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION(line 12) no Hoare annotation was computed. [2021-11-09 10:35:36,806 INFO L857 garLoopResultBuilder]: For program point L27-3(lines 27 36) no Hoare annotation was computed. [2021-11-09 10:35:36,806 INFO L857 garLoopResultBuilder]: For program point L11(lines 11 12) no Hoare annotation was computed. [2021-11-09 10:35:36,807 INFO L857 garLoopResultBuilder]: For program point L11-1(lines 11 12) no Hoare annotation was computed. [2021-11-09 10:35:36,807 INFO L857 garLoopResultBuilder]: For program point L7(line 7) no Hoare annotation was computed. [2021-11-09 10:35:36,807 INFO L857 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-11-09 10:35:36,807 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-11-09 10:35:36,808 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-11-09 10:35:36,808 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 12) no Hoare annotation was computed. [2021-11-09 10:35:36,808 INFO L857 garLoopResultBuilder]: For program point L10(lines 10 13) no Hoare annotation was computed. [2021-11-09 10:35:36,808 INFO L853 garLoopResultBuilder]: At program point L10-2(lines 30 31) the Hoare annotation is: (and (= (+ ULTIMATE.start_main_~y~0 (* ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~y~0)) (* 2 ULTIMATE.start_main_~x~0)) (= 1 ULTIMATE.start___VERIFIER_assert_~cond)) [2021-11-09 10:35:36,809 INFO L857 garLoopResultBuilder]: For program point L10-3(lines 10 13) no Hoare annotation was computed. [2021-11-09 10:35:36,809 INFO L860 garLoopResultBuilder]: At program point L39(lines 17 40) the Hoare annotation is: true [2021-11-09 10:35:36,809 INFO L857 garLoopResultBuilder]: For program point L6(lines 6 8) no Hoare annotation was computed. [2021-11-09 10:35:36,809 INFO L860 garLoopResultBuilder]: At program point L10-5(lines 9 15) the Hoare annotation is: true [2021-11-09 10:35:36,814 INFO L731 BasicCegarLoop]: Path program histogram: [3, 1, 1] [2021-11-09 10:35:36,816 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-09 10:35:36,833 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.11 10:35:36 BoogieIcfgContainer [2021-11-09 10:35:36,833 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-09 10:35:36,834 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-09 10:35:36,834 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-09 10:35:36,835 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-09 10:35:36,835 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 10:35:33" (3/4) ... [2021-11-09 10:35:36,839 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-11-09 10:35:36,852 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2021-11-09 10:35:36,853 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-11-09 10:35:36,853 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-11-09 10:35:36,853 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-11-09 10:35:36,897 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23c2829a-d39a-41ab-8a3b-9758de73a49a/bin/uautomizer-IVEQpCNsaX/witness.graphml [2021-11-09 10:35:36,898 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-09 10:35:36,900 INFO L168 Benchmark]: Toolchain (without parser) took 4191.93 ms. Allocated memory was 90.2 MB in the beginning and 109.1 MB in the end (delta: 18.9 MB). Free memory was 55.6 MB in the beginning and 57.0 MB in the end (delta: -1.4 MB). Peak memory consumption was 14.5 MB. Max. memory is 16.1 GB. [2021-11-09 10:35:36,901 INFO L168 Benchmark]: CDTParser took 0.33 ms. Allocated memory is still 90.2 MB. Free memory was 62.2 MB in the beginning and 62.2 MB in the end (delta: 21.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-09 10:35:36,901 INFO L168 Benchmark]: CACSL2BoogieTranslator took 382.68 ms. Allocated memory is still 90.2 MB. Free memory was 55.4 MB in the beginning and 66.6 MB in the end (delta: -11.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-11-09 10:35:36,902 INFO L168 Benchmark]: Boogie Procedure Inliner took 55.60 ms. Allocated memory is still 90.2 MB. Free memory was 66.6 MB in the beginning and 65.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-09 10:35:36,902 INFO L168 Benchmark]: Boogie Preprocessor took 44.54 ms. Allocated memory is still 90.2 MB. Free memory was 65.2 MB in the beginning and 64.1 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-09 10:35:36,903 INFO L168 Benchmark]: RCFGBuilder took 386.73 ms. Allocated memory is still 90.2 MB. Free memory was 64.1 MB in the beginning and 54.7 MB in the end (delta: 9.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-11-09 10:35:36,904 INFO L168 Benchmark]: TraceAbstraction took 3247.44 ms. Allocated memory was 90.2 MB in the beginning and 109.1 MB in the end (delta: 18.9 MB). Free memory was 54.4 MB in the beginning and 59.5 MB in the end (delta: -5.2 MB). Peak memory consumption was 13.2 MB. Max. memory is 16.1 GB. [2021-11-09 10:35:36,905 INFO L168 Benchmark]: Witness Printer took 63.74 ms. Allocated memory is still 109.1 MB. Free memory was 59.5 MB in the beginning and 57.0 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-09 10:35:36,908 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33 ms. Allocated memory is still 90.2 MB. Free memory was 62.2 MB in the beginning and 62.2 MB in the end (delta: 21.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 382.68 ms. Allocated memory is still 90.2 MB. Free memory was 55.4 MB in the beginning and 66.6 MB in the end (delta: -11.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 55.60 ms. Allocated memory is still 90.2 MB. Free memory was 66.6 MB in the beginning and 65.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 44.54 ms. Allocated memory is still 90.2 MB. Free memory was 65.2 MB in the beginning and 64.1 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 386.73 ms. Allocated memory is still 90.2 MB. Free memory was 64.1 MB in the beginning and 54.7 MB in the end (delta: 9.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 3247.44 ms. Allocated memory was 90.2 MB in the beginning and 109.1 MB in the end (delta: 18.9 MB). Free memory was 54.4 MB in the beginning and 59.5 MB in the end (delta: -5.2 MB). Peak memory consumption was 13.2 MB. Max. memory is 16.1 GB. * Witness Printer took 63.74 ms. Allocated memory is still 109.1 MB. Free memory was 59.5 MB in the beginning and 57.0 MB in the end (delta: 2.6 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 - PositiveResult [Line: 12]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 12]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 17 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 3.1s, OverallIterations: 5, TraceHistogramMax: 4, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 50 SDtfs, 22 SDslu, 75 SDs, 0 SdLazy, 88 SolverSat, 27 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 52 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=22occurred in iteration=4, InterpolantAutomatonStates: 24, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 3 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 4 LocationsWithAnnotation, 4 PreInvPairs, 14 NumberOfFragments, 42 HoareAnnotationTreeSize, 4 FomulaSimplifications, 123 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 4 FomulaSimplificationsInter, 3 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 53 NumberOfCodeBlocks, 50 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 48 ConstructedInterpolants, 0 QuantifiedInterpolants, 177 SizeOfPredicates, 14 NumberOfNonLiveVariables, 272 ConjunctsInSsa, 45 ConjunctsInUnsatCore, 5 InterpolantComputations, 2 PerfectInterpolantSequences, 14/24 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold - InvariantResult [Line: 30]: Loop Invariant Derived loop invariant: y + y * y == 2 * x && 1 == cond - InvariantResult [Line: 9]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 27]: Loop Invariant Derived loop invariant: (y + y * y == 2 * x && 1 == cond) || (y == 0 && y + y * y == 2 * x) - InvariantResult [Line: 17]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2021-11-09 10:35:36,973 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23c2829a-d39a-41ab-8a3b-9758de73a49a/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE