./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/indp2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e77c044 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e849050-2a59-4c39-b9e0-80473e8ecba5/bin/uautomizer-WNIpwEf4Nt/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e849050-2a59-4c39-b9e0-80473e8ecba5/bin/uautomizer-WNIpwEf4Nt/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e849050-2a59-4c39-b9e0-80473e8ecba5/bin/uautomizer-WNIpwEf4Nt/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e849050-2a59-4c39-b9e0-80473e8ecba5/bin/uautomizer-WNIpwEf4Nt/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-fpi/indp2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e849050-2a59-4c39-b9e0-80473e8ecba5/bin/uautomizer-WNIpwEf4Nt/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e849050-2a59-4c39-b9e0-80473e8ecba5/bin/uautomizer-WNIpwEf4Nt --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c50b40cd11bc256173e14037b4ee99385e99b290 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 00:52:22,618 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 00:52:22,621 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 00:52:22,675 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 00:52:22,676 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 00:52:22,680 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 00:52:22,682 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 00:52:22,685 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 00:52:22,688 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 00:52:22,694 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 00:52:22,695 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 00:52:22,696 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 00:52:22,697 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 00:52:22,699 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 00:52:22,702 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 00:52:22,706 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 00:52:22,708 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 00:52:22,709 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 00:52:22,711 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 00:52:22,719 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 00:52:22,721 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 00:52:22,723 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 00:52:22,726 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 00:52:22,727 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 00:52:22,736 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 00:52:22,736 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 00:52:22,736 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 00:52:22,738 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 00:52:22,739 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 00:52:22,743 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 00:52:22,743 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 00:52:22,744 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 00:52:22,746 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 00:52:22,748 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 00:52:22,749 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 00:52:22,750 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 00:52:22,750 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 00:52:22,751 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 00:52:22,751 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 00:52:22,752 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 00:52:22,753 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 00:52:22,753 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e849050-2a59-4c39-b9e0-80473e8ecba5/bin/uautomizer-WNIpwEf4Nt/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-13 00:52:22,795 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 00:52:22,795 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 00:52:22,796 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-13 00:52:22,796 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-13 00:52:22,803 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-13 00:52:22,804 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-13 00:52:22,804 INFO L138 SettingsManager]: * Use SBE=true [2021-10-13 00:52:22,804 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 00:52:22,804 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 00:52:22,805 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 00:52:22,806 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 00:52:22,806 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 00:52:22,806 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 00:52:22,806 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 00:52:22,807 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 00:52:22,807 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 00:52:22,807 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 00:52:22,807 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 00:52:22,807 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 00:52:22,808 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 00:52:22,808 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 00:52:22,808 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 00:52:22,808 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 00:52:22,809 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 00:52:22,809 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 00:52:22,809 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 00:52:22,809 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-13 00:52:22,810 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-13 00:52:22,810 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 00:52:22,810 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 00:52:22,810 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_3e849050-2a59-4c39-b9e0-80473e8ecba5/bin/uautomizer-WNIpwEf4Nt/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e849050-2a59-4c39-b9e0-80473e8ecba5/bin/uautomizer-WNIpwEf4Nt Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c50b40cd11bc256173e14037b4ee99385e99b290 [2021-10-13 00:52:23,128 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 00:52:23,164 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 00:52:23,167 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 00:52:23,169 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 00:52:23,169 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 00:52:23,170 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e849050-2a59-4c39-b9e0-80473e8ecba5/bin/uautomizer-WNIpwEf4Nt/../../sv-benchmarks/c/array-fpi/indp2.c [2021-10-13 00:52:23,239 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e849050-2a59-4c39-b9e0-80473e8ecba5/bin/uautomizer-WNIpwEf4Nt/data/867cc1438/5755b470f0e44f59a7f96ae3e749b3cb/FLAG385e0479c [2021-10-13 00:52:23,700 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 00:52:23,700 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e849050-2a59-4c39-b9e0-80473e8ecba5/sv-benchmarks/c/array-fpi/indp2.c [2021-10-13 00:52:23,711 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e849050-2a59-4c39-b9e0-80473e8ecba5/bin/uautomizer-WNIpwEf4Nt/data/867cc1438/5755b470f0e44f59a7f96ae3e749b3cb/FLAG385e0479c [2021-10-13 00:52:24,091 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e849050-2a59-4c39-b9e0-80473e8ecba5/bin/uautomizer-WNIpwEf4Nt/data/867cc1438/5755b470f0e44f59a7f96ae3e749b3cb [2021-10-13 00:52:24,094 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 00:52:24,096 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 00:52:24,097 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 00:52:24,098 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 00:52:24,107 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 00:52:24,108 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 12:52:24" (1/1) ... [2021-10-13 00:52:24,109 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2714a25a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:52:24, skipping insertion in model container [2021-10-13 00:52:24,112 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 12:52:24" (1/1) ... [2021-10-13 00:52:24,119 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 00:52:24,134 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 00:52:24,310 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_3e849050-2a59-4c39-b9e0-80473e8ecba5/sv-benchmarks/c/array-fpi/indp2.c[588,601] [2021-10-13 00:52:24,329 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 00:52:24,337 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 00:52:24,351 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_3e849050-2a59-4c39-b9e0-80473e8ecba5/sv-benchmarks/c/array-fpi/indp2.c[588,601] [2021-10-13 00:52:24,358 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 00:52:24,375 INFO L208 MainTranslator]: Completed translation [2021-10-13 00:52:24,375 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:52:24 WrapperNode [2021-10-13 00:52:24,375 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 00:52:24,377 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 00:52:24,377 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 00:52:24,377 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 00:52:24,385 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:52:24" (1/1) ... [2021-10-13 00:52:24,391 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:52:24" (1/1) ... [2021-10-13 00:52:24,411 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 00:52:24,412 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 00:52:24,412 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 00:52:24,412 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 00:52:24,419 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:52:24" (1/1) ... [2021-10-13 00:52:24,419 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:52:24" (1/1) ... [2021-10-13 00:52:24,421 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:52:24" (1/1) ... [2021-10-13 00:52:24,421 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:52:24" (1/1) ... [2021-10-13 00:52:24,427 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:52:24" (1/1) ... [2021-10-13 00:52:24,431 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:52:24" (1/1) ... [2021-10-13 00:52:24,433 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:52:24" (1/1) ... [2021-10-13 00:52:24,435 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 00:52:24,436 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 00:52:24,436 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 00:52:24,436 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 00:52:24,447 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:52:24" (1/1) ... [2021-10-13 00:52:24,456 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 00:52:24,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e849050-2a59-4c39-b9e0-80473e8ecba5/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:52:24,481 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e849050-2a59-4c39-b9e0-80473e8ecba5/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 00:52:24,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e849050-2a59-4c39-b9e0-80473e8ecba5/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 00:52:24,522 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-13 00:52:24,523 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 00:52:24,523 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-13 00:52:24,523 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-13 00:52:24,523 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 00:52:24,523 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 00:52:24,523 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-13 00:52:24,831 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 00:52:24,831 INFO L299 CfgBuilder]: Removed 12 assume(true) statements. [2021-10-13 00:52:24,833 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 12:52:24 BoogieIcfgContainer [2021-10-13 00:52:24,833 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 00:52:24,835 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 00:52:24,850 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 00:52:24,854 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 00:52:24,854 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 12:52:24" (1/3) ... [2021-10-13 00:52:24,855 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68ef9df8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 12:52:24, skipping insertion in model container [2021-10-13 00:52:24,855 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:52:24" (2/3) ... [2021-10-13 00:52:24,856 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68ef9df8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 12:52:24, skipping insertion in model container [2021-10-13 00:52:24,856 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 12:52:24" (3/3) ... [2021-10-13 00:52:24,857 INFO L111 eAbstractionObserver]: Analyzing ICFG indp2.c [2021-10-13 00:52:24,862 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 00:52:24,862 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-13 00:52:24,944 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 00:52:24,967 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-13 00:52:24,967 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-13 00:52:24,988 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:52:24,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-13 00:52:24,994 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:52:24,994 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:52:24,995 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:52:25,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:52:25,006 INFO L82 PathProgramCache]: Analyzing trace with hash -592971038, now seen corresponding path program 1 times [2021-10-13 00:52:25,015 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:52:25,016 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404657724] [2021-10-13 00:52:25,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:52:25,017 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:52:25,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:52:25,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:52:25,215 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:52:25,216 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404657724] [2021-10-13 00:52:25,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404657724] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:52:25,217 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:52:25,218 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-13 00:52:25,220 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666555409] [2021-10-13 00:52:25,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-13 00:52:25,238 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:52:25,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-13 00:52:25,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-13 00:52:25,261 INFO L87 Difference]: Start difference. First operand has 24 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 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) [2021-10-13 00:52:25,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:52:25,281 INFO L93 Difference]: Finished difference Result 44 states and 62 transitions. [2021-10-13 00:52:25,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-13 00:52:25,282 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 [2021-10-13 00:52:25,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:52:25,291 INFO L225 Difference]: With dead ends: 44 [2021-10-13 00:52:25,292 INFO L226 Difference]: Without dead ends: 20 [2021-10-13 00:52:25,295 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-13 00:52:25,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-10-13 00:52:25,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-10-13 00:52:25,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:52:25,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2021-10-13 00:52:25,332 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 14 [2021-10-13 00:52:25,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:52:25,333 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2021-10-13 00:52:25,334 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) [2021-10-13 00:52:25,334 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2021-10-13 00:52:25,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-13 00:52:25,335 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:52:25,336 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:52:25,336 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-13 00:52:25,337 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:52:25,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:52:25,341 INFO L82 PathProgramCache]: Analyzing trace with hash 108093540, now seen corresponding path program 1 times [2021-10-13 00:52:25,342 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:52:25,342 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899643067] [2021-10-13 00:52:25,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:52:25,343 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:52:25,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:52:25,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:52:25,478 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:52:25,478 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899643067] [2021-10-13 00:52:25,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899643067] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:52:25,479 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:52:25,479 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-13 00:52:25,479 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124094051] [2021-10-13 00:52:25,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 00:52:25,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:52:25,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 00:52:25,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 00:52:25,482 INFO L87 Difference]: Start difference. First operand 20 states and 23 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) [2021-10-13 00:52:25,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:52:25,563 INFO L93 Difference]: Finished difference Result 45 states and 53 transitions. [2021-10-13 00:52:25,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 00:52:25,564 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 [2021-10-13 00:52:25,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:52:25,566 INFO L225 Difference]: With dead ends: 45 [2021-10-13 00:52:25,566 INFO L226 Difference]: Without dead ends: 32 [2021-10-13 00:52:25,567 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.6ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 00:52:25,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-10-13 00:52:25,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 23. [2021-10-13 00:52:25,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:52:25,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2021-10-13 00:52:25,578 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 14 [2021-10-13 00:52:25,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:52:25,579 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2021-10-13 00:52:25,580 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) [2021-10-13 00:52:25,580 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2021-10-13 00:52:25,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-13 00:52:25,583 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:52:25,583 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:52:25,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-13 00:52:25,584 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:52:25,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:52:25,594 INFO L82 PathProgramCache]: Analyzing trace with hash 615941150, now seen corresponding path program 1 times [2021-10-13 00:52:25,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:52:25,595 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116923258] [2021-10-13 00:52:25,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:52:25,595 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:52:25,613 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-13 00:52:25,614 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [98700754] [2021-10-13 00:52:25,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:52:25,618 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:52:25,618 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e849050-2a59-4c39-b9e0-80473e8ecba5/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:52:25,622 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e849050-2a59-4c39-b9e0-80473e8ecba5/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:52:25,642 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e849050-2a59-4c39-b9e0-80473e8ecba5/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-13 00:52:25,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:52:25,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-13 00:52:25,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:52:25,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 00:52:25,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-10-13 00:52:26,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-10-13 00:52:26,187 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:52:26,187 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:52:26,188 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116923258] [2021-10-13 00:52:26,188 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-13 00:52:26,188 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98700754] [2021-10-13 00:52:26,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98700754] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:52:26,189 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-13 00:52:26,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-10-13 00:52:26,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314468841] [2021-10-13 00:52:26,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 00:52:26,190 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:52:26,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 00:52:26,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-10-13 00:52:26,191 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 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) [2021-10-13 00:52:26,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:52:26,281 INFO L93 Difference]: Finished difference Result 41 states and 45 transitions. [2021-10-13 00:52:26,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-13 00:52:26,282 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 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 [2021-10-13 00:52:26,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:52:26,284 INFO L225 Difference]: With dead ends: 41 [2021-10-13 00:52:26,284 INFO L226 Difference]: Without dead ends: 39 [2021-10-13 00:52:26,284 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 63.1ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-10-13 00:52:26,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-10-13 00:52:26,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 28. [2021-10-13 00:52:26,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 27 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:52:26,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2021-10-13 00:52:26,291 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 20 [2021-10-13 00:52:26,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:52:26,292 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2021-10-13 00:52:26,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 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) [2021-10-13 00:52:26,292 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2021-10-13 00:52:26,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-13 00:52:26,293 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:52:26,293 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:52:26,321 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e849050-2a59-4c39-b9e0-80473e8ecba5/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-13 00:52:26,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e849050-2a59-4c39-b9e0-80473e8ecba5/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:52:26,509 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:52:26,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:52:26,510 INFO L82 PathProgramCache]: Analyzing trace with hash 859342364, now seen corresponding path program 2 times [2021-10-13 00:52:26,510 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:52:26,510 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012602135] [2021-10-13 00:52:26,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:52:26,510 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:52:26,524 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-13 00:52:26,524 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1149031738] [2021-10-13 00:52:26,525 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 00:52:26,525 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:52:26,525 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e849050-2a59-4c39-b9e0-80473e8ecba5/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:52:26,526 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e849050-2a59-4c39-b9e0-80473e8ecba5/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:52:26,554 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e849050-2a59-4c39-b9e0-80473e8ecba5/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-13 00:52:26,623 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 00:52:26,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:52:26,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 00:52:26,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:52:26,788 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 00:52:26,789 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:52:26,789 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012602135] [2021-10-13 00:52:26,789 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-13 00:52:26,789 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149031738] [2021-10-13 00:52:26,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149031738] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:52:26,790 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-13 00:52:26,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-10-13 00:52:26,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687021374] [2021-10-13 00:52:26,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-13 00:52:26,793 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:52:26,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-13 00:52:26,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-13 00:52:26,795 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-10-13 00:52:26,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:52:26,936 INFO L93 Difference]: Finished difference Result 78 states and 89 transitions. [2021-10-13 00:52:26,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-13 00:52:26,937 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) Word has length 22 [2021-10-13 00:52:26,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:52:26,938 INFO L225 Difference]: With dead ends: 78 [2021-10-13 00:52:26,938 INFO L226 Difference]: Without dead ends: 44 [2021-10-13 00:52:26,940 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 50.9ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-10-13 00:52:26,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-10-13 00:52:26,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 29. [2021-10-13 00:52:26,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 28 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:52:26,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2021-10-13 00:52:26,953 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 22 [2021-10-13 00:52:26,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:52:26,954 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2021-10-13 00:52:26,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2021-10-13 00:52:26,954 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2021-10-13 00:52:26,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-13 00:52:26,955 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:52:26,955 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:52:26,988 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e849050-2a59-4c39-b9e0-80473e8ecba5/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-13 00:52:27,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e849050-2a59-4c39-b9e0-80473e8ecba5/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:52:27,171 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:52:27,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:52:27,171 INFO L82 PathProgramCache]: Analyzing trace with hash 1304966232, now seen corresponding path program 3 times [2021-10-13 00:52:27,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:52:27,172 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146294102] [2021-10-13 00:52:27,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:52:27,172 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:52:27,184 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-13 00:52:27,184 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [476513718] [2021-10-13 00:52:27,185 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 00:52:27,185 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:52:27,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e849050-2a59-4c39-b9e0-80473e8ecba5/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:52:27,193 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e849050-2a59-4c39-b9e0-80473e8ecba5/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:52:27,193 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e849050-2a59-4c39-b9e0-80473e8ecba5/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-13 00:52:27,276 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-13 00:52:27,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:52:27,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 27 conjunts are in the unsatisfiable core [2021-10-13 00:52:27,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:52:27,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 00:52:27,363 INFO L354 Elim1Store]: treesize reduction 31, result has 18.4 percent of original size [2021-10-13 00:52:27,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2021-10-13 00:52:28,519 INFO L354 Elim1Store]: treesize reduction 41, result has 21.2 percent of original size [2021-10-13 00:52:28,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 37 [2021-10-13 00:52:28,659 INFO L354 Elim1Store]: treesize reduction 92, result has 29.8 percent of original size [2021-10-13 00:52:28,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 60 treesize of output 74 [2021-10-13 00:52:33,397 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 00:52:33,419 INFO L354 Elim1Store]: treesize reduction 58, result has 28.4 percent of original size [2021-10-13 00:52:33,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 71 treesize of output 70 [2021-10-13 00:52:33,656 INFO L354 Elim1Store]: treesize reduction 84, result has 31.7 percent of original size [2021-10-13 00:52:33,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 77 treesize of output 83 [2021-10-13 00:52:37,714 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 9 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:52:37,714 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:52:37,715 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146294102] [2021-10-13 00:52:37,715 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-13 00:52:37,715 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476513718] [2021-10-13 00:52:37,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476513718] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:52:37,715 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-13 00:52:37,715 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-10-13 00:52:37,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832952785] [2021-10-13 00:52:37,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-13 00:52:37,716 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:52:37,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-13 00:52:37,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=209, Unknown=2, NotChecked=0, Total=272 [2021-10-13 00:52:37,717 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:52:40,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:52:40,476 INFO L93 Difference]: Finished difference Result 51 states and 56 transitions. [2021-10-13 00:52:40,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-13 00:52:40,477 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 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 26 [2021-10-13 00:52:40,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:52:40,478 INFO L225 Difference]: With dead ends: 51 [2021-10-13 00:52:40,478 INFO L226 Difference]: Without dead ends: 49 [2021-10-13 00:52:40,479 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 8556.4ms TimeCoverageRelationStatistics Valid=88, Invalid=330, Unknown=2, NotChecked=0, Total=420 [2021-10-13 00:52:40,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-10-13 00:52:40,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 40. [2021-10-13 00:52:40,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 39 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:52:40,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2021-10-13 00:52:40,487 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 26 [2021-10-13 00:52:40,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:52:40,487 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2021-10-13 00:52:40,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:52:40,488 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2021-10-13 00:52:40,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-13 00:52:40,489 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:52:40,489 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:52:40,532 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e849050-2a59-4c39-b9e0-80473e8ecba5/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-13 00:52:40,702 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e849050-2a59-4c39-b9e0-80473e8ecba5/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:52:40,703 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:52:40,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:52:40,703 INFO L82 PathProgramCache]: Analyzing trace with hash 1587482582, now seen corresponding path program 4 times [2021-10-13 00:52:40,703 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:52:40,704 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683677898] [2021-10-13 00:52:40,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:52:40,704 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:52:40,713 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-13 00:52:40,714 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1328361768] [2021-10-13 00:52:40,714 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 00:52:40,714 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:52:40,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e849050-2a59-4c39-b9e0-80473e8ecba5/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:52:40,724 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e849050-2a59-4c39-b9e0-80473e8ecba5/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:52:40,726 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e849050-2a59-4c39-b9e0-80473e8ecba5/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-13 00:52:40,831 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 00:52:40,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:52:40,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 00:52:40,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:52:40,980 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-13 00:52:40,980 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:52:40,981 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683677898] [2021-10-13 00:52:40,981 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-13 00:52:40,981 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328361768] [2021-10-13 00:52:40,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328361768] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:52:40,985 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-13 00:52:40,986 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-10-13 00:52:40,988 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373226617] [2021-10-13 00:52:40,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-13 00:52:40,988 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:52:40,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-13 00:52:40,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-10-13 00:52:40,989 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:52:41,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:52:41,162 INFO L93 Difference]: Finished difference Result 101 states and 111 transitions. [2021-10-13 00:52:41,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-13 00:52:41,162 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 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 28 [2021-10-13 00:52:41,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:52:41,163 INFO L225 Difference]: With dead ends: 101 [2021-10-13 00:52:41,163 INFO L226 Difference]: Without dead ends: 83 [2021-10-13 00:52:41,164 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 70.1ms TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-10-13 00:52:41,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-10-13 00:52:41,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 57. [2021-10-13 00:52:41,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.1428571428571428) internal successors, (64), 56 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:52:41,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 64 transitions. [2021-10-13 00:52:41,174 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 64 transitions. Word has length 28 [2021-10-13 00:52:41,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:52:41,175 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 64 transitions. [2021-10-13 00:52:41,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:52:41,175 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 64 transitions. [2021-10-13 00:52:41,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-13 00:52:41,176 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:52:41,176 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:52:41,203 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e849050-2a59-4c39-b9e0-80473e8ecba5/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-13 00:52:41,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e849050-2a59-4c39-b9e0-80473e8ecba5/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-10-13 00:52:41,400 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:52:41,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:52:41,400 INFO L82 PathProgramCache]: Analyzing trace with hash 341343694, now seen corresponding path program 1 times [2021-10-13 00:52:41,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:52:41,401 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538226827] [2021-10-13 00:52:41,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:52:41,401 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:52:41,408 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-13 00:52:41,408 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [333093667] [2021-10-13 00:52:41,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:52:41,409 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:52:41,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e849050-2a59-4c39-b9e0-80473e8ecba5/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:52:41,413 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e849050-2a59-4c39-b9e0-80473e8ecba5/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:52:41,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e849050-2a59-4c39-b9e0-80473e8ecba5/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-13 00:52:41,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:52:41,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 28 conjunts are in the unsatisfiable core [2021-10-13 00:52:41,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:52:41,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-13 00:52:41,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:52:41,656 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 00:52:41,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 30 [2021-10-13 00:52:41,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2021-10-13 00:52:41,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:52:41,775 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 00:52:41,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 28 [2021-10-13 00:52:41,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2021-10-13 00:52:41,920 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:52:41,920 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:52:41,920 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538226827] [2021-10-13 00:52:41,920 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-13 00:52:41,921 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333093667] [2021-10-13 00:52:41,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333093667] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:52:41,921 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-13 00:52:41,921 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-10-13 00:52:41,921 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288871226] [2021-10-13 00:52:41,921 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-13 00:52:41,921 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:52:41,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-13 00:52:41,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-10-13 00:52:41,922 INFO L87 Difference]: Start difference. First operand 57 states and 64 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:52:42,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:52:42,066 INFO L93 Difference]: Finished difference Result 63 states and 69 transitions. [2021-10-13 00:52:42,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-13 00:52:42,067 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 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 30 [2021-10-13 00:52:42,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:52:42,070 INFO L225 Difference]: With dead ends: 63 [2021-10-13 00:52:42,070 INFO L226 Difference]: Without dead ends: 42 [2021-10-13 00:52:42,071 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 89.2ms TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-10-13 00:52:42,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-10-13 00:52:42,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-10-13 00:52:42,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.146341463414634) internal successors, (47), 41 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:52:42,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2021-10-13 00:52:42,095 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 30 [2021-10-13 00:52:42,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:52:42,097 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2021-10-13 00:52:42,098 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:52:42,101 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2021-10-13 00:52:42,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-13 00:52:42,103 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:52:42,103 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:52:42,131 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e849050-2a59-4c39-b9e0-80473e8ecba5/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-13 00:52:42,318 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e849050-2a59-4c39-b9e0-80473e8ecba5/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-10-13 00:52:42,319 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:52:42,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:52:42,319 INFO L82 PathProgramCache]: Analyzing trace with hash 1672696980, now seen corresponding path program 5 times [2021-10-13 00:52:42,319 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:52:42,319 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428948786] [2021-10-13 00:52:42,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:52:42,319 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:52:42,327 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-13 00:52:42,327 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [17936075] [2021-10-13 00:52:42,328 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 00:52:42,328 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:52:42,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e849050-2a59-4c39-b9e0-80473e8ecba5/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:52:42,339 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e849050-2a59-4c39-b9e0-80473e8ecba5/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:52:42,341 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e849050-2a59-4c39-b9e0-80473e8ecba5/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-13 00:52:42,523 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-10-13 00:52:42,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:52:42,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 00:52:42,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:52:42,675 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-13 00:52:42,675 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:52:42,675 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428948786] [2021-10-13 00:52:42,675 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-13 00:52:42,675 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17936075] [2021-10-13 00:52:42,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [17936075] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:52:42,675 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-13 00:52:42,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-10-13 00:52:42,676 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224911252] [2021-10-13 00:52:42,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-13 00:52:42,676 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:52:42,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-13 00:52:42,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-10-13 00:52:42,677 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:52:42,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:52:42,814 INFO L93 Difference]: Finished difference Result 64 states and 68 transitions. [2021-10-13 00:52:42,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-13 00:52:42,814 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 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 30 [2021-10-13 00:52:42,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:52:42,815 INFO L225 Difference]: With dead ends: 64 [2021-10-13 00:52:42,815 INFO L226 Difference]: Without dead ends: 55 [2021-10-13 00:52:42,816 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 57.2ms TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-10-13 00:52:42,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-10-13 00:52:42,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 35. [2021-10-13 00:52:42,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 34 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:52:42,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2021-10-13 00:52:42,821 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 30 [2021-10-13 00:52:42,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:52:42,822 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2021-10-13 00:52:42,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:52:42,822 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2021-10-13 00:52:42,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-10-13 00:52:42,823 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:52:42,823 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:52:42,862 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e849050-2a59-4c39-b9e0-80473e8ecba5/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-13 00:52:43,023 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e849050-2a59-4c39-b9e0-80473e8ecba5/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:52:43,024 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:52:43,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:52:43,024 INFO L82 PathProgramCache]: Analyzing trace with hash -1505554158, now seen corresponding path program 6 times [2021-10-13 00:52:43,024 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:52:43,024 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511626264] [2021-10-13 00:52:43,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:52:43,024 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:52:43,036 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-13 00:52:43,038 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [815415723] [2021-10-13 00:52:43,038 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 00:52:43,039 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:52:43,039 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e849050-2a59-4c39-b9e0-80473e8ecba5/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:52:43,040 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e849050-2a59-4c39-b9e0-80473e8ecba5/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:52:43,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e849050-2a59-4c39-b9e0-80473e8ecba5/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-13 00:52:43,257 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-10-13 00:52:43,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:52:43,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 34 conjunts are in the unsatisfiable core [2021-10-13 00:52:43,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:52:43,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-10-13 00:52:43,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:52:43,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2021-10-13 00:52:43,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:52:43,436 INFO L354 Elim1Store]: treesize reduction 66, result has 20.5 percent of original size [2021-10-13 00:52:43,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 50 [2021-10-13 00:52:43,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:52:43,642 INFO L354 Elim1Store]: treesize reduction 55, result has 16.7 percent of original size [2021-10-13 00:52:43,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 58 treesize of output 52 [2021-10-13 00:52:43,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:52:43,821 INFO L354 Elim1Store]: treesize reduction 140, result has 31.4 percent of original size [2021-10-13 00:52:43,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 72 treesize of output 105 [2021-10-13 00:52:44,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:52:44,510 INFO L354 Elim1Store]: treesize reduction 140, result has 31.4 percent of original size [2021-10-13 00:52:44,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 126 treesize of output 137 [2021-10-13 00:52:52,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:52:52,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 00:52:52,833 INFO L354 Elim1Store]: treesize reduction 80, result has 15.8 percent of original size [2021-10-13 00:52:52,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 140 treesize of output 106 [2021-10-13 00:52:53,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 00:52:53,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:52:53,179 INFO L354 Elim1Store]: treesize reduction 80, result has 15.8 percent of original size [2021-10-13 00:52:53,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 138 treesize of output 104 [2021-10-13 00:52:53,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:52:53,573 INFO L354 Elim1Store]: treesize reduction 144, result has 25.0 percent of original size [2021-10-13 00:52:53,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 137 treesize of output 118 [2021-10-13 00:52:55,324 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:52:55,324 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:52:55,324 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511626264] [2021-10-13 00:52:55,325 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-13 00:52:55,325 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815415723] [2021-10-13 00:52:55,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815415723] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:52:55,325 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-13 00:52:55,325 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2021-10-13 00:52:55,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796126806] [2021-10-13 00:52:55,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-13 00:52:55,326 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:52:55,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-13 00:52:55,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-10-13 00:52:55,330 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:52:57,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:52:57,503 INFO L93 Difference]: Finished difference Result 59 states and 64 transitions. [2021-10-13 00:52:57,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-10-13 00:52:57,503 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 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 32 [2021-10-13 00:52:57,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:52:57,504 INFO L225 Difference]: With dead ends: 59 [2021-10-13 00:52:57,504 INFO L226 Difference]: Without dead ends: 57 [2021-10-13 00:52:57,505 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 4265.7ms TimeCoverageRelationStatistics Valid=129, Invalid=741, Unknown=0, NotChecked=0, Total=870 [2021-10-13 00:52:57,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-10-13 00:52:57,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 48. [2021-10-13 00:52:57,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.127659574468085) internal successors, (53), 47 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:52:57,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2021-10-13 00:52:57,512 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 32 [2021-10-13 00:52:57,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:52:57,512 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2021-10-13 00:52:57,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:52:57,513 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2021-10-13 00:52:57,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-13 00:52:57,515 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:52:57,515 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:52:57,536 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e849050-2a59-4c39-b9e0-80473e8ecba5/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-13 00:52:57,718 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e849050-2a59-4c39-b9e0-80473e8ecba5/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:52:57,719 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:52:57,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:52:57,719 INFO L82 PathProgramCache]: Analyzing trace with hash -2083150320, now seen corresponding path program 7 times [2021-10-13 00:52:57,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:52:57,719 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93135918] [2021-10-13 00:52:57,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:52:57,719 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:52:57,728 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-13 00:52:57,729 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1286124528] [2021-10-13 00:52:57,729 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-13 00:52:57,729 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:52:57,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e849050-2a59-4c39-b9e0-80473e8ecba5/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:52:57,730 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e849050-2a59-4c39-b9e0-80473e8ecba5/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:52:57,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e849050-2a59-4c39-b9e0-80473e8ecba5/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-13 00:52:58,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:52:58,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 00:52:58,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:52:58,191 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-13 00:52:58,192 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:52:58,192 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93135918] [2021-10-13 00:52:58,192 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-13 00:52:58,192 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286124528] [2021-10-13 00:52:58,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286124528] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:52:58,192 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-13 00:52:58,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-10-13 00:52:58,192 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439993253] [2021-10-13 00:52:58,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-13 00:52:58,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:52:58,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-13 00:52:58,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-10-13 00:52:58,194 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:52:58,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:52:58,381 INFO L93 Difference]: Finished difference Result 125 states and 135 transitions. [2021-10-13 00:52:58,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-13 00:52:58,382 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 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 34 [2021-10-13 00:52:58,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:52:58,383 INFO L225 Difference]: With dead ends: 125 [2021-10-13 00:52:58,383 INFO L226 Difference]: Without dead ends: 105 [2021-10-13 00:52:58,383 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 88.5ms TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-10-13 00:52:58,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-10-13 00:52:58,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 71. [2021-10-13 00:52:58,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.1285714285714286) internal successors, (79), 70 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:52:58,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 79 transitions. [2021-10-13 00:52:58,397 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 79 transitions. Word has length 34 [2021-10-13 00:52:58,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:52:58,397 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 79 transitions. [2021-10-13 00:52:58,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:52:58,397 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 79 transitions. [2021-10-13 00:52:58,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-10-13 00:52:58,398 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:52:58,399 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:52:58,432 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e849050-2a59-4c39-b9e0-80473e8ecba5/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-13 00:52:58,614 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e849050-2a59-4c39-b9e0-80473e8ecba5/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-10-13 00:52:58,615 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:52:58,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:52:58,615 INFO L82 PathProgramCache]: Analyzing trace with hash -968725112, now seen corresponding path program 2 times [2021-10-13 00:52:58,615 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:52:58,615 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047575797] [2021-10-13 00:52:58,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:52:58,615 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:52:58,628 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-13 00:52:58,628 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1090666942] [2021-10-13 00:52:58,628 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 00:52:58,628 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:52:58,628 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e849050-2a59-4c39-b9e0-80473e8ecba5/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:52:58,649 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e849050-2a59-4c39-b9e0-80473e8ecba5/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:52:58,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e849050-2a59-4c39-b9e0-80473e8ecba5/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-13 00:52:58,915 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 00:52:58,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:52:58,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 34 conjunts are in the unsatisfiable core [2021-10-13 00:52:58,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:52:58,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-10-13 00:52:59,035 INFO L354 Elim1Store]: treesize reduction 37, result has 19.6 percent of original size [2021-10-13 00:52:59,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 35 [2021-10-13 00:52:59,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:52:59,169 INFO L354 Elim1Store]: treesize reduction 73, result has 13.1 percent of original size [2021-10-13 00:52:59,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 60 treesize of output 54 [2021-10-13 00:52:59,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 00:52:59,284 INFO L354 Elim1Store]: treesize reduction 72, result has 17.2 percent of original size [2021-10-13 00:52:59,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 60 treesize of output 63 [2021-10-13 00:52:59,454 INFO L354 Elim1Store]: treesize reduction 102, result has 28.7 percent of original size [2021-10-13 00:52:59,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 63 treesize of output 77 [2021-10-13 00:52:59,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:52:59,767 INFO L354 Elim1Store]: treesize reduction 69, result has 13.8 percent of original size [2021-10-13 00:52:59,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 71 treesize of output 57 [2021-10-13 00:52:59,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 00:52:59,933 INFO L354 Elim1Store]: treesize reduction 68, result has 18.1 percent of original size [2021-10-13 00:52:59,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 71 treesize of output 62 [2021-10-13 00:53:00,098 INFO L354 Elim1Store]: treesize reduction 94, result has 30.4 percent of original size [2021-10-13 00:53:00,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 74 treesize of output 80 [2021-10-13 00:53:01,004 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:53:01,005 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:53:01,005 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047575797] [2021-10-13 00:53:01,005 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-13 00:53:01,005 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090666942] [2021-10-13 00:53:01,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090666942] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:53:01,005 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-13 00:53:01,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-10-13 00:53:01,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361454511] [2021-10-13 00:53:01,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-13 00:53:01,006 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:53:01,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-13 00:53:01,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2021-10-13 00:53:01,007 INFO L87 Difference]: Start difference. First operand 71 states and 79 transitions. Second operand has 20 states, 19 states have (on average 1.894736842105263) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:53:01,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:53:01,567 INFO L93 Difference]: Finished difference Result 82 states and 91 transitions. [2021-10-13 00:53:01,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-13 00:53:01,568 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.894736842105263) internal successors, (36), 20 states have internal predecessors, (36), 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 36 [2021-10-13 00:53:01,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:53:01,568 INFO L225 Difference]: With dead ends: 82 [2021-10-13 00:53:01,568 INFO L226 Difference]: Without dead ends: 0 [2021-10-13 00:53:01,569 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 577.1ms TimeCoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2021-10-13 00:53:01,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-13 00:53:01,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-13 00:53:01,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:53:01,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-13 00:53:01,570 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 36 [2021-10-13 00:53:01,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:53:01,570 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-13 00:53:01,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.894736842105263) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:53:01,570 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-13 00:53:01,570 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-13 00:53:01,572 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 00:53:01,612 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e849050-2a59-4c39-b9e0-80473e8ecba5/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-13 00:53:01,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e849050-2a59-4c39-b9e0-80473e8ecba5/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:53:01,789 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-10-13 00:53:01,792 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 00:53:01,834 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 00:53:02,048 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 00:53:02,049 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 00:53:02,073 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 00:53:03,061 INFO L857 garLoopResultBuilder]: For program point L35-2(lines 35 38) no Hoare annotation was computed. [2021-10-13 00:53:03,061 INFO L853 garLoopResultBuilder]: At program point L35-3(lines 35 38) the Hoare annotation is: (let ((.cse10 (select |#memory_int| ULTIMATE.start_main_~a~0.base))) (let ((.cse6 (select .cse10 (+ ULTIMATE.start_main_~a~0.offset 8)))) (let ((.cse4 (<= ~N~0 1)) (.cse5 (<= 2 ULTIMATE.start_main_~i~0)) (.cse7 (= .cse6 0)) (.cse0 (<= 1 ~N~0)) (.cse1 (= (+ (select .cse10 ULTIMATE.start_main_~a~0.offset) 1) 0)) (.cse2 (= ULTIMATE.start_main_~i~0 0)) (.cse8 (exists ((v_ULTIMATE.start_main_~i~0_26 Int)) (and (<= ~N~0 (+ v_ULTIMATE.start_main_~i~0_26 1)) (= (+ (select (select |#memory_int| ULTIMATE.start_main_~a~0.base) (+ (* v_ULTIMATE.start_main_~i~0_26 8) ULTIMATE.start_main_~a~0.offset)) v_ULTIMATE.start_main_~i~0_26 1) (* v_ULTIMATE.start_main_~i~0_26 v_ULTIMATE.start_main_~i~0_26))))) (.cse3 (= ULTIMATE.start_main_~a~0.offset 0)) (.cse9 (<= ~N~0 2))) (or (and .cse0 .cse1 .cse2 .cse3 .cse4) (and (<= ULTIMATE.start_main_~i~0 1) .cse0 .cse1 (<= 1 ULTIMATE.start_main_~i~0) .cse3 .cse4) (and .cse5 .cse0 .cse1 .cse3 (= (+ .cse6 1) 0) (<= ULTIMATE.start_main_~i~0 2)) (and .cse7 .cse0 .cse1 .cse8 .cse3 (= ULTIMATE.start_main_~i~0 1) .cse9) (and .cse5 .cse1 .cse3 (< 2 ~N~0)) (and .cse7 .cse0 .cse1 .cse2 .cse8 .cse3 .cse9))))) [2021-10-13 00:53:03,062 INFO L857 garLoopResultBuilder]: For program point L35-4(lines 35 38) no Hoare annotation was computed. [2021-10-13 00:53:03,062 INFO L857 garLoopResultBuilder]: For program point L15(line 15) no Hoare annotation was computed. [2021-10-13 00:53:03,062 INFO L857 garLoopResultBuilder]: For program point L15-1(line 15) no Hoare annotation was computed. [2021-10-13 00:53:03,062 INFO L857 garLoopResultBuilder]: For program point L15-3(line 15) no Hoare annotation was computed. [2021-10-13 00:53:03,062 INFO L857 garLoopResultBuilder]: For program point L40-2(lines 40 43) no Hoare annotation was computed. [2021-10-13 00:53:03,062 INFO L853 garLoopResultBuilder]: At program point L40-3(lines 40 43) the Hoare annotation is: (let ((.cse11 (select |#memory_int| ULTIMATE.start_main_~a~0.base))) (let ((.cse5 (select .cse11 (+ ULTIMATE.start_main_~a~0.offset 8))) (.cse12 (select .cse11 ULTIMATE.start_main_~a~0.offset))) (let ((.cse8 (<= 1 ULTIMATE.start_main_~i~0)) (.cse7 (= .cse12 0)) (.cse4 (<= ~N~0 1)) (.cse6 (<= 2 ULTIMATE.start_main_~i~0)) (.cse0 (<= 1 ~N~0)) (.cse1 (= (+ .cse12 1) 0)) (.cse10 (= (+ .cse5 1) 0)) (.cse2 (= ULTIMATE.start_main_~i~0 0)) (.cse3 (= ULTIMATE.start_main_~a~0.offset 0)) (.cse9 (< 2 ~N~0))) (or (and .cse0 .cse1 .cse2 .cse3 .cse4) (and (= .cse5 0) .cse6 .cse0 .cse7 .cse3 (<= ULTIMATE.start_main_~i~0 2)) (and .cse8 .cse7 .cse3 .cse9) (and .cse0 .cse7 .cse3 (= ULTIMATE.start_main_~i~0 1) .cse10) (and (<= ULTIMATE.start_main_~i~0 1) .cse0 .cse8 .cse7 .cse3 .cse4) (and .cse6 .cse9) (and .cse0 .cse1 .cse2 .cse3 .cse10) (and .cse2 (= (+ (select .cse11 (+ (* ULTIMATE.start_main_~i~0 8) ULTIMATE.start_main_~a~0.offset)) ULTIMATE.start_main_~i~0 1) (* ULTIMATE.start_main_~i~0 ULTIMATE.start_main_~i~0)) .cse3 .cse9))))) [2021-10-13 00:53:03,062 INFO L857 garLoopResultBuilder]: For program point L40-4(lines 40 43) no Hoare annotation was computed. [2021-10-13 00:53:03,062 INFO L857 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-10-13 00:53:03,062 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-10-13 00:53:03,063 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-10-13 00:53:03,063 INFO L857 garLoopResultBuilder]: For program point L24(line 24) no Hoare annotation was computed. [2021-10-13 00:53:03,063 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 15) no Hoare annotation was computed. [2021-10-13 00:53:03,063 INFO L857 garLoopResultBuilder]: For program point L12(lines 12 14) no Hoare annotation was computed. [2021-10-13 00:53:03,063 INFO L857 garLoopResultBuilder]: For program point L45-2(lines 45 48) no Hoare annotation was computed. [2021-10-13 00:53:03,063 INFO L853 garLoopResultBuilder]: At program point L45-3(lines 45 48) the Hoare annotation is: (let ((.cse6 (select |#memory_int| ULTIMATE.start_main_~a~0.base))) (let ((.cse2 (= (select .cse6 (+ ULTIMATE.start_main_~a~0.offset 8)) 0)) (.cse4 (= (select .cse6 ULTIMATE.start_main_~a~0.offset) 0)) (.cse5 (= ULTIMATE.start_main_~i~0 0)) (.cse3 (= ULTIMATE.start_main_~a~0.offset 0)) (.cse1 (<= ~N~0 1)) (.cse0 (<= 1 ~N~0))) (or (and (<= 0 ULTIMATE.start_main_~i~0) (< 2 ~N~0)) (and (<= ULTIMATE.start_main_~i~0 1) .cse0 (<= 1 ULTIMATE.start_main_~i~0) .cse1) (and .cse2 .cse0 .cse3 (= ULTIMATE.start_main_~i~0 1)) (and .cse2 .cse0 .cse4 .cse5 .cse3) (and .cse0 .cse4 .cse5 .cse3 .cse1) (and (<= 2 ULTIMATE.start_main_~i~0) .cse0 (<= ULTIMATE.start_main_~i~0 2))))) [2021-10-13 00:53:03,064 INFO L857 garLoopResultBuilder]: For program point L45-4(lines 45 48) no Hoare annotation was computed. [2021-10-13 00:53:03,064 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-10-13 00:53:03,064 INFO L860 garLoopResultBuilder]: At program point L50(lines 21 51) the Hoare annotation is: true [2021-10-13 00:53:03,064 INFO L857 garLoopResultBuilder]: For program point L13(line 13) no Hoare annotation was computed. [2021-10-13 00:53:03,064 INFO L857 garLoopResultBuilder]: For program point L30-2(lines 30 33) no Hoare annotation was computed. [2021-10-13 00:53:03,064 INFO L853 garLoopResultBuilder]: At program point L30-3(lines 30 33) the Hoare annotation is: (let ((.cse0 (<= 1 ~N~0)) (.cse1 (= ULTIMATE.start_main_~a~0.offset 0))) (or (and .cse0 (= (+ (select (select |#memory_int| ULTIMATE.start_main_~a~0.base) ULTIMATE.start_main_~a~0.offset) 1) 0) .cse1 (= ULTIMATE.start_main_~i~0 1)) (and .cse0 (= ULTIMATE.start_main_~i~0 0) .cse1))) [2021-10-13 00:53:03,065 INFO L857 garLoopResultBuilder]: For program point L30-4(lines 30 33) no Hoare annotation was computed. [2021-10-13 00:53:03,069 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 00:53:03,091 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~i~0_26,QUANTIFIED] [2021-10-13 00:53:03,092 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~i~0_26,QUANTIFIED] [2021-10-13 00:53:03,092 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~i~0_26,QUANTIFIED] [2021-10-13 00:53:03,092 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~i~0_26,QUANTIFIED] [2021-10-13 00:53:03,092 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~i~0_26,QUANTIFIED] [2021-10-13 00:53:03,093 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~i~0_26,QUANTIFIED] [2021-10-13 00:53:03,093 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~i~0_26,QUANTIFIED] [2021-10-13 00:53:03,093 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~i~0_26,QUANTIFIED] [2021-10-13 00:53:03,094 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~i~0_26,QUANTIFIED] [2021-10-13 00:53:03,094 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~i~0_26,QUANTIFIED] [2021-10-13 00:53:03,096 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~i~0_26,QUANTIFIED] [2021-10-13 00:53:03,096 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~i~0_26,QUANTIFIED] [2021-10-13 00:53:03,096 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~i~0_26,QUANTIFIED] [2021-10-13 00:53:03,096 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~i~0_26,QUANTIFIED] [2021-10-13 00:53:03,097 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~i~0_26,QUANTIFIED] [2021-10-13 00:53:03,097 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~i~0_26,QUANTIFIED] [2021-10-13 00:53:03,097 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~i~0_26,QUANTIFIED] [2021-10-13 00:53:03,097 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~i~0_26,QUANTIFIED] [2021-10-13 00:53:03,098 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~i~0_26,QUANTIFIED] [2021-10-13 00:53:03,098 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~i~0_26,QUANTIFIED] [2021-10-13 00:53:03,100 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 12:53:03 BoogieIcfgContainer [2021-10-13 00:53:03,100 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 00:53:03,100 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-13 00:53:03,101 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-13 00:53:03,101 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-13 00:53:03,101 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 12:52:24" (3/4) ... [2021-10-13 00:53:03,104 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-13 00:53:03,114 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2021-10-13 00:53:03,114 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-13 00:53:03,114 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-13 00:53:03,115 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-13 00:53:03,137 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: ((((((((1 <= N && unknown-#memory_int-unknown[a][a] + 1 == 0) && i == 0) && a == 0) && N <= 1) || (((((i <= 1 && 1 <= N) && unknown-#memory_int-unknown[a][a] + 1 == 0) && 1 <= i) && a == 0) && N <= 1)) || (((((2 <= i && 1 <= N) && unknown-#memory_int-unknown[a][a] + 1 == 0) && a == 0) && unknown-#memory_int-unknown[a][a + 8] + 1 == 0) && i <= 2)) || ((((((unknown-#memory_int-unknown[a][a + 8] == 0 && 1 <= N) && unknown-#memory_int-unknown[a][a] + 1 == 0) && (\exists v_ULTIMATE.start_main_~i~0_26 : int :: N <= v_ULTIMATE.start_main_~i~0_26 + 1 && unknown-#memory_int-unknown[a][v_ULTIMATE.start_main_~i~0_26 * 8 + a] + v_ULTIMATE.start_main_~i~0_26 + 1 == v_ULTIMATE.start_main_~i~0_26 * v_ULTIMATE.start_main_~i~0_26)) && a == 0) && i == 1) && N <= 2)) || (((2 <= i && unknown-#memory_int-unknown[a][a] + 1 == 0) && a == 0) && 2 < N)) || ((((((unknown-#memory_int-unknown[a][a + 8] == 0 && 1 <= N) && unknown-#memory_int-unknown[a][a] + 1 == 0) && i == 0) && (\exists v_ULTIMATE.start_main_~i~0_26 : int :: N <= v_ULTIMATE.start_main_~i~0_26 + 1 && unknown-#memory_int-unknown[a][v_ULTIMATE.start_main_~i~0_26 * 8 + a] + v_ULTIMATE.start_main_~i~0_26 + 1 == v_ULTIMATE.start_main_~i~0_26 * v_ULTIMATE.start_main_~i~0_26)) && a == 0) && N <= 2) [2021-10-13 00:53:03,149 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e849050-2a59-4c39-b9e0-80473e8ecba5/bin/uautomizer-WNIpwEf4Nt/witness.graphml [2021-10-13 00:53:03,150 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-13 00:53:03,151 INFO L168 Benchmark]: Toolchain (without parser) took 39054.65 ms. Allocated memory was 125.8 MB in the beginning and 151.0 MB in the end (delta: 25.2 MB). Free memory was 90.2 MB in the beginning and 41.0 MB in the end (delta: 49.2 MB). Peak memory consumption was 73.4 MB. Max. memory is 16.1 GB. [2021-10-13 00:53:03,151 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 125.8 MB. Free memory was 106.6 MB in the beginning and 106.6 MB in the end (delta: 68.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 00:53:03,151 INFO L168 Benchmark]: CACSL2BoogieTranslator took 278.38 ms. Allocated memory is still 125.8 MB. Free memory was 90.0 MB in the beginning and 101.9 MB in the end (delta: -11.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-13 00:53:03,152 INFO L168 Benchmark]: Boogie Procedure Inliner took 34.75 ms. Allocated memory is still 125.8 MB. Free memory was 101.9 MB in the beginning and 100.4 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 00:53:03,152 INFO L168 Benchmark]: Boogie Preprocessor took 23.03 ms. Allocated memory is still 125.8 MB. Free memory was 100.4 MB in the beginning and 99.2 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 00:53:03,153 INFO L168 Benchmark]: RCFGBuilder took 397.42 ms. Allocated memory is still 125.8 MB. Free memory was 99.2 MB in the beginning and 88.3 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-13 00:53:03,153 INFO L168 Benchmark]: TraceAbstraction took 38265.18 ms. Allocated memory was 125.8 MB in the beginning and 151.0 MB in the end (delta: 25.2 MB). Free memory was 87.9 MB in the beginning and 44.2 MB in the end (delta: 43.7 MB). Peak memory consumption was 78.2 MB. Max. memory is 16.1 GB. [2021-10-13 00:53:03,153 INFO L168 Benchmark]: Witness Printer took 49.35 ms. Allocated memory is still 151.0 MB. Free memory was 44.2 MB in the beginning and 41.0 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 00:53:03,155 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 125.8 MB. Free memory was 106.6 MB in the beginning and 106.6 MB in the end (delta: 68.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 278.38 ms. Allocated memory is still 125.8 MB. Free memory was 90.0 MB in the beginning and 101.9 MB in the end (delta: -11.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 34.75 ms. Allocated memory is still 125.8 MB. Free memory was 101.9 MB in the beginning and 100.4 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 23.03 ms. Allocated memory is still 125.8 MB. Free memory was 100.4 MB in the beginning and 99.2 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 397.42 ms. Allocated memory is still 125.8 MB. Free memory was 99.2 MB in the beginning and 88.3 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 38265.18 ms. Allocated memory was 125.8 MB in the beginning and 151.0 MB in the end (delta: 25.2 MB). Free memory was 87.9 MB in the beginning and 44.2 MB in the end (delta: 43.7 MB). Peak memory consumption was 78.2 MB. Max. memory is 16.1 GB. * Witness Printer took 49.35 ms. Allocated memory is still 151.0 MB. Free memory was 44.2 MB in the beginning and 41.0 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~i~0_26,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~i~0_26,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~i~0_26,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~i~0_26,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~i~0_26,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~i~0_26,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~i~0_26,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~i~0_26,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~i~0_26,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~i~0_26,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~i~0_26,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~i~0_26,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~i~0_26,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~i~0_26,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~i~0_26,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~i~0_26,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~i~0_26,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~i~0_26,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~i~0_26,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~i~0_26,QUANTIFIED] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 15]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 24 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 38126.4ms, OverallIterations: 11, TraceHistogramMax: 4, EmptinessCheckTime: 26.1ms, AutomataDifference: 6540.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 1273.6ms, InitialAbstractionConstructionTime: 14.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 178 SDtfs, 484 SDslu, 526 SDs, 0 SdLazy, 1525 SolverSat, 315 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 4003.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 296 GetRequests, 159 SyntacticMatches, 3 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 536 ImplicationChecksByTransitivity, 13831.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=71occurred in iteration=10, InterpolantAutomatonStates: 130, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 119.0ms AutomataMinimizationTime, 11 MinimizatonAttempts, 133 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 5 LocationsWithAnnotation, 5 PreInvPairs, 53 NumberOfFragments, 518 HoareAnnotationTreeSize, 5 FomulaSimplifications, 578251 FormulaSimplificationTreeSizeReduction, 287.7ms HoareSimplificationTime, 5 FomulaSimplificationsInter, 8730 FormulaSimplificationTreeSizeReductionInter, 979.4ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 111.9ms SsaConstructionTime, 377.6ms SatisfiabilityAnalysisTime, 26262.9ms InterpolantComputationTime, 286 NumberOfCodeBlocks, 283 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 275 ConstructedInterpolants, 59 QuantifiedInterpolants, 5856 SizeOfPredicates, 63 NumberOfNonLiveVariables, 878 ConjunctsInSsa, 173 ConjunctsInUnsatCore, 11 InterpolantComputations, 2 PerfectInterpolantSequences, 58/164 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 40]: Loop Invariant Derived loop invariant: ((((((((((1 <= N && unknown-#memory_int-unknown[a][a] + 1 == 0) && i == 0) && a == 0) && N <= 1) || (((((unknown-#memory_int-unknown[a][a + 8] == 0 && 2 <= i) && 1 <= N) && unknown-#memory_int-unknown[a][a] == 0) && a == 0) && i <= 2)) || (((1 <= i && unknown-#memory_int-unknown[a][a] == 0) && a == 0) && 2 < N)) || ((((1 <= N && unknown-#memory_int-unknown[a][a] == 0) && a == 0) && i == 1) && unknown-#memory_int-unknown[a][a + 8] + 1 == 0)) || (((((i <= 1 && 1 <= N) && 1 <= i) && unknown-#memory_int-unknown[a][a] == 0) && a == 0) && N <= 1)) || (2 <= i && 2 < N)) || ((((1 <= N && unknown-#memory_int-unknown[a][a] + 1 == 0) && i == 0) && a == 0) && unknown-#memory_int-unknown[a][a + 8] + 1 == 0)) || (((i == 0 && unknown-#memory_int-unknown[a][i * 8 + a] + i + 1 == i * i) && a == 0) && 2 < N) - InvariantResult [Line: 45]: Loop Invariant Derived loop invariant: (((((0 <= i && 2 < N) || (((i <= 1 && 1 <= N) && 1 <= i) && N <= 1)) || (((unknown-#memory_int-unknown[a][a + 8] == 0 && 1 <= N) && a == 0) && i == 1)) || ((((unknown-#memory_int-unknown[a][a + 8] == 0 && 1 <= N) && unknown-#memory_int-unknown[a][a] == 0) && i == 0) && a == 0)) || ((((1 <= N && unknown-#memory_int-unknown[a][a] == 0) && i == 0) && a == 0) && N <= 1)) || ((2 <= i && 1 <= N) && i <= 2) - InvariantResult [Line: 21]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 30]: Loop Invariant Derived loop invariant: (((1 <= N && unknown-#memory_int-unknown[a][a] + 1 == 0) && a == 0) && i == 1) || ((1 <= N && i == 0) && a == 0) - InvariantResult [Line: 35]: Loop Invariant [2021-10-13 00:53:03,170 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~i~0_26,QUANTIFIED] [2021-10-13 00:53:03,170 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~i~0_26,QUANTIFIED] [2021-10-13 00:53:03,170 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~i~0_26,QUANTIFIED] [2021-10-13 00:53:03,171 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~i~0_26,QUANTIFIED] [2021-10-13 00:53:03,171 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~i~0_26,QUANTIFIED] [2021-10-13 00:53:03,171 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~i~0_26,QUANTIFIED] [2021-10-13 00:53:03,171 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~i~0_26,QUANTIFIED] [2021-10-13 00:53:03,171 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~i~0_26,QUANTIFIED] [2021-10-13 00:53:03,172 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~i~0_26,QUANTIFIED] [2021-10-13 00:53:03,172 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~i~0_26,QUANTIFIED] [2021-10-13 00:53:03,173 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~i~0_26,QUANTIFIED] [2021-10-13 00:53:03,173 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~i~0_26,QUANTIFIED] [2021-10-13 00:53:03,174 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~i~0_26,QUANTIFIED] [2021-10-13 00:53:03,174 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~i~0_26,QUANTIFIED] [2021-10-13 00:53:03,174 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~i~0_26,QUANTIFIED] [2021-10-13 00:53:03,174 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~i~0_26,QUANTIFIED] [2021-10-13 00:53:03,174 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~i~0_26,QUANTIFIED] [2021-10-13 00:53:03,175 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~i~0_26,QUANTIFIED] [2021-10-13 00:53:03,175 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~i~0_26,QUANTIFIED] [2021-10-13 00:53:03,175 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~i~0_26,QUANTIFIED] Derived loop invariant: ((((((((1 <= N && unknown-#memory_int-unknown[a][a] + 1 == 0) && i == 0) && a == 0) && N <= 1) || (((((i <= 1 && 1 <= N) && unknown-#memory_int-unknown[a][a] + 1 == 0) && 1 <= i) && a == 0) && N <= 1)) || (((((2 <= i && 1 <= N) && unknown-#memory_int-unknown[a][a] + 1 == 0) && a == 0) && unknown-#memory_int-unknown[a][a + 8] + 1 == 0) && i <= 2)) || ((((((unknown-#memory_int-unknown[a][a + 8] == 0 && 1 <= N) && unknown-#memory_int-unknown[a][a] + 1 == 0) && (\exists v_ULTIMATE.start_main_~i~0_26 : int :: N <= v_ULTIMATE.start_main_~i~0_26 + 1 && unknown-#memory_int-unknown[a][v_ULTIMATE.start_main_~i~0_26 * 8 + a] + v_ULTIMATE.start_main_~i~0_26 + 1 == v_ULTIMATE.start_main_~i~0_26 * v_ULTIMATE.start_main_~i~0_26)) && a == 0) && i == 1) && N <= 2)) || (((2 <= i && unknown-#memory_int-unknown[a][a] + 1 == 0) && a == 0) && 2 < N)) || ((((((unknown-#memory_int-unknown[a][a + 8] == 0 && 1 <= N) && unknown-#memory_int-unknown[a][a] + 1 == 0) && i == 0) && (\exists v_ULTIMATE.start_main_~i~0_26 : int :: N <= v_ULTIMATE.start_main_~i~0_26 + 1 && unknown-#memory_int-unknown[a][v_ULTIMATE.start_main_~i~0_26 * 8 + a] + v_ULTIMATE.start_main_~i~0_26 + 1 == v_ULTIMATE.start_main_~i~0_26 * v_ULTIMATE.start_main_~i~0_26)) && a == 0) && N <= 2) RESULT: Ultimate proved your program to be correct! [2021-10-13 00:53:03,217 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e849050-2a59-4c39-b9e0-80473e8ecba5/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...