./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/verifythis/prefixsum_rec.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dcdd98b-7e1b-4e88-97f2-e7a15f74ab5b/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dcdd98b-7e1b-4e88-97f2-e7a15f74ab5b/bin/uautomizer-DQz5hQGWxF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dcdd98b-7e1b-4e88-97f2-e7a15f74ab5b/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dcdd98b-7e1b-4e88-97f2-e7a15f74ab5b/bin/uautomizer-DQz5hQGWxF/config/AutomizerReach.xml -i ../../sv-benchmarks/c/verifythis/prefixsum_rec.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dcdd98b-7e1b-4e88-97f2-e7a15f74ab5b/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dcdd98b-7e1b-4e88-97f2-e7a15f74ab5b/bin/uautomizer-DQz5hQGWxF --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 81bdf17d0130e934dcb31a2f76f595e947b99d6273334b7f05365a624466aeab --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 05:31:47,276 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 05:31:47,278 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 05:31:47,309 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 05:31:47,309 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 05:31:47,311 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 05:31:47,312 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 05:31:47,315 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 05:31:47,317 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 05:31:47,318 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 05:31:47,319 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 05:31:47,321 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 05:31:47,321 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 05:31:47,322 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 05:31:47,324 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 05:31:47,325 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 05:31:47,326 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 05:31:47,328 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 05:31:47,330 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 05:31:47,332 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 05:31:47,334 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 05:31:47,335 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 05:31:47,337 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 05:31:47,337 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 05:31:47,341 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 05:31:47,341 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 05:31:47,342 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 05:31:47,343 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 05:31:47,343 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 05:31:47,344 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 05:31:47,345 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 05:31:47,345 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 05:31:47,346 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 05:31:47,347 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 05:31:47,348 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 05:31:47,349 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 05:31:47,350 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 05:31:47,350 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 05:31:47,350 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 05:31:47,352 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 05:31:47,352 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 05:31:47,353 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dcdd98b-7e1b-4e88-97f2-e7a15f74ab5b/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-20 05:31:47,378 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 05:31:47,378 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 05:31:47,379 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 05:31:47,379 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 05:31:47,380 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 05:31:47,380 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 05:31:47,381 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 05:31:47,381 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 05:31:47,382 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 05:31:47,382 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 05:31:47,382 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 05:31:47,383 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 05:31:47,383 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 05:31:47,384 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 05:31:47,384 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 05:31:47,384 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 05:31:47,385 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 05:31:47,385 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 05:31:47,385 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 05:31:47,386 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 05:31:47,386 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 05:31:47,387 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 05:31:47,387 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 05:31:47,387 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 05:31:47,388 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 05:31:47,388 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 05:31:47,389 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 05:31:47,389 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 05:31:47,389 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 05:31:47,390 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 05:31:47,390 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-20 05:31:47,390 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-20 05:31:47,391 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 05:31:47,391 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 05:31:47,391 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_6dcdd98b-7e1b-4e88-97f2-e7a15f74ab5b/bin/uautomizer-DQz5hQGWxF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dcdd98b-7e1b-4e88-97f2-e7a15f74ab5b/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 81bdf17d0130e934dcb31a2f76f595e947b99d6273334b7f05365a624466aeab [2021-11-20 05:31:47,625 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 05:31:47,657 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 05:31:47,659 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 05:31:47,661 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 05:31:47,661 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 05:31:47,663 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dcdd98b-7e1b-4e88-97f2-e7a15f74ab5b/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/verifythis/prefixsum_rec.c [2021-11-20 05:31:47,717 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dcdd98b-7e1b-4e88-97f2-e7a15f74ab5b/bin/uautomizer-DQz5hQGWxF/data/3babbbc7c/406534a3761a4a36af0aecf03846dfea/FLAG169d54c48 [2021-11-20 05:31:48,210 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 05:31:48,212 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dcdd98b-7e1b-4e88-97f2-e7a15f74ab5b/sv-benchmarks/c/verifythis/prefixsum_rec.c [2021-11-20 05:31:48,233 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dcdd98b-7e1b-4e88-97f2-e7a15f74ab5b/bin/uautomizer-DQz5hQGWxF/data/3babbbc7c/406534a3761a4a36af0aecf03846dfea/FLAG169d54c48 [2021-11-20 05:31:48,562 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dcdd98b-7e1b-4e88-97f2-e7a15f74ab5b/bin/uautomizer-DQz5hQGWxF/data/3babbbc7c/406534a3761a4a36af0aecf03846dfea [2021-11-20 05:31:48,565 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 05:31:48,567 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 05:31:48,572 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 05:31:48,573 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 05:31:48,575 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 05:31:48,576 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 05:31:48" (1/1) ... [2021-11-20 05:31:48,577 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@392a476b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:31:48, skipping insertion in model container [2021-11-20 05:31:48,577 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 05:31:48" (1/1) ... [2021-11-20 05:31:48,584 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 05:31:48,599 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 05:31:48,784 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dcdd98b-7e1b-4e88-97f2-e7a15f74ab5b/sv-benchmarks/c/verifythis/prefixsum_rec.c[525,538] [2021-11-20 05:31:48,811 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 05:31:48,821 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 05:31:48,832 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dcdd98b-7e1b-4e88-97f2-e7a15f74ab5b/sv-benchmarks/c/verifythis/prefixsum_rec.c[525,538] [2021-11-20 05:31:48,846 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 05:31:48,860 INFO L208 MainTranslator]: Completed translation [2021-11-20 05:31:48,860 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:31:48 WrapperNode [2021-11-20 05:31:48,861 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 05:31:48,862 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 05:31:48,862 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 05:31:48,862 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 05:31:48,870 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:31:48" (1/1) ... [2021-11-20 05:31:48,878 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:31:48" (1/1) ... [2021-11-20 05:31:48,901 INFO L137 Inliner]: procedures = 22, calls = 37, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 75 [2021-11-20 05:31:48,901 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 05:31:48,902 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 05:31:48,902 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 05:31:48,902 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 05:31:48,913 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:31:48" (1/1) ... [2021-11-20 05:31:48,913 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:31:48" (1/1) ... [2021-11-20 05:31:48,925 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:31:48" (1/1) ... [2021-11-20 05:31:48,926 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:31:48" (1/1) ... [2021-11-20 05:31:48,936 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:31:48" (1/1) ... [2021-11-20 05:31:48,940 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:31:48" (1/1) ... [2021-11-20 05:31:48,942 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:31:48" (1/1) ... [2021-11-20 05:31:48,945 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 05:31:48,946 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 05:31:48,946 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 05:31:48,946 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 05:31:48,948 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:31:48" (1/1) ... [2021-11-20 05:31:48,955 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 05:31:48,976 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dcdd98b-7e1b-4e88-97f2-e7a15f74ab5b/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:31:49,001 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dcdd98b-7e1b-4e88-97f2-e7a15f74ab5b/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 05:31:49,009 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dcdd98b-7e1b-4e88-97f2-e7a15f74ab5b/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 05:31:49,040 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 05:31:49,040 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-20 05:31:49,040 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-20 05:31:49,040 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 05:31:49,040 INFO L130 BoogieDeclarations]: Found specification of procedure downsweep [2021-11-20 05:31:49,041 INFO L138 BoogieDeclarations]: Found implementation of procedure downsweep [2021-11-20 05:31:49,041 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-20 05:31:49,041 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-20 05:31:49,041 INFO L130 BoogieDeclarations]: Found specification of procedure upsweep [2021-11-20 05:31:49,041 INFO L138 BoogieDeclarations]: Found implementation of procedure upsweep [2021-11-20 05:31:49,041 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 05:31:49,041 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 05:31:49,042 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-20 05:31:49,042 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-11-20 05:31:49,042 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-11-20 05:31:49,042 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 05:31:49,125 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 05:31:49,126 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 05:31:51,508 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 05:31:51,516 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 05:31:51,516 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-20 05:31:51,524 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 05:31:51 BoogieIcfgContainer [2021-11-20 05:31:51,524 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 05:31:51,526 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 05:31:51,526 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 05:31:51,539 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 05:31:51,539 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 05:31:48" (1/3) ... [2021-11-20 05:31:51,540 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75a204fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 05:31:51, skipping insertion in model container [2021-11-20 05:31:51,540 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:31:48" (2/3) ... [2021-11-20 05:31:51,541 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75a204fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 05:31:51, skipping insertion in model container [2021-11-20 05:31:51,541 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 05:31:51" (3/3) ... [2021-11-20 05:31:51,542 INFO L111 eAbstractionObserver]: Analyzing ICFG prefixsum_rec.c [2021-11-20 05:31:51,560 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 05:31:51,561 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 05:31:51,620 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 05:31:51,627 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-20 05:31:51,639 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 05:31:51,680 INFO L276 IsEmpty]: Start isEmpty. Operand has 49 states, 33 states have (on average 1.3333333333333333) internal successors, (44), 36 states have internal predecessors, (44), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-20 05:31:51,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-20 05:31:51,689 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:31:51,689 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:31:51,690 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:31:51,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:31:51,696 INFO L85 PathProgramCache]: Analyzing trace with hash 1639330660, now seen corresponding path program 1 times [2021-11-20 05:31:51,705 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:31:51,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342754564] [2021-11-20 05:31:51,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:31:51,706 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:31:51,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:31:51,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 05:31:51,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:31:51,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-20 05:31:51,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:31:51,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-20 05:31:51,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:31:51,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-20 05:31:51,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:31:51,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-20 05:31:51,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:31:51,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-11-20 05:31:51,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:31:52,010 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-20 05:31:52,010 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:31:52,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342754564] [2021-11-20 05:31:52,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342754564] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:31:52,012 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:31:52,012 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 05:31:52,014 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652844795] [2021-11-20 05:31:52,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:31:52,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 05:31:52,018 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:31:52,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 05:31:52,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 05:31:52,048 INFO L87 Difference]: Start difference. First operand has 49 states, 33 states have (on average 1.3333333333333333) internal successors, (44), 36 states have internal predecessors, (44), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 2 states have internal predecessors, (27), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-20 05:31:52,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:31:52,128 INFO L93 Difference]: Finished difference Result 96 states and 127 transitions. [2021-11-20 05:31:52,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 05:31:52,131 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 2 states have internal predecessors, (27), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 44 [2021-11-20 05:31:52,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:31:52,139 INFO L225 Difference]: With dead ends: 96 [2021-11-20 05:31:52,139 INFO L226 Difference]: Without dead ends: 46 [2021-11-20 05:31:52,142 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 05:31:52,147 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 6 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:31:52,148 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 88 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 05:31:52,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-11-20 05:31:52,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2021-11-20 05:31:52,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 32 states have internal predecessors, (35), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-20 05:31:52,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 55 transitions. [2021-11-20 05:31:52,189 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 55 transitions. Word has length 44 [2021-11-20 05:31:52,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:31:52,190 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 55 transitions. [2021-11-20 05:31:52,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 2 states have internal predecessors, (27), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-20 05:31:52,190 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 55 transitions. [2021-11-20 05:31:52,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-20 05:31:52,193 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:31:52,194 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:31:52,194 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 05:31:52,194 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:31:52,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:31:52,195 INFO L85 PathProgramCache]: Analyzing trace with hash 1439199646, now seen corresponding path program 1 times [2021-11-20 05:31:52,195 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:31:52,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77305398] [2021-11-20 05:31:52,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:31:52,196 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:31:52,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:31:52,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 05:31:52,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:31:52,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-20 05:31:52,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:31:52,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-20 05:31:52,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:31:52,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-20 05:31:52,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:31:52,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-20 05:31:52,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:31:52,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-11-20 05:31:52,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:31:52,507 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-20 05:31:52,507 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:31:52,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77305398] [2021-11-20 05:31:52,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77305398] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:31:52,508 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:31:52,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 05:31:52,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919389154] [2021-11-20 05:31:52,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:31:52,510 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 05:31:52,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:31:52,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 05:31:52,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-20 05:31:52,518 INFO L87 Difference]: Start difference. First operand 45 states and 55 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-20 05:31:54,558 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-20 05:31:55,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:31:55,000 INFO L93 Difference]: Finished difference Result 87 states and 110 transitions. [2021-11-20 05:31:55,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-20 05:31:55,001 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 44 [2021-11-20 05:31:55,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:31:55,003 INFO L225 Difference]: With dead ends: 87 [2021-11-20 05:31:55,003 INFO L226 Difference]: Without dead ends: 71 [2021-11-20 05:31:55,004 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-11-20 05:31:55,006 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 35 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 18 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-20 05:31:55,007 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 245 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 113 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-20 05:31:55,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-11-20 05:31:55,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 46. [2021-11-20 05:31:55,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 33 states have internal predecessors, (36), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-20 05:31:55,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 56 transitions. [2021-11-20 05:31:55,050 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 56 transitions. Word has length 44 [2021-11-20 05:31:55,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:31:55,050 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 56 transitions. [2021-11-20 05:31:55,051 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-20 05:31:55,051 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 56 transitions. [2021-11-20 05:31:55,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-20 05:31:55,057 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:31:55,058 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:31:55,058 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 05:31:55,058 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:31:55,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:31:55,059 INFO L85 PathProgramCache]: Analyzing trace with hash -1012024996, now seen corresponding path program 1 times [2021-11-20 05:31:55,059 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:31:55,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642566229] [2021-11-20 05:31:55,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:31:55,060 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:31:55,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:31:55,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 05:31:55,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:31:55,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-20 05:31:55,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:31:55,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-20 05:31:55,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:31:55,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-20 05:31:55,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:31:55,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-11-20 05:31:55,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:31:55,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-20 05:31:55,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:31:55,377 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 05:31:55,378 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:31:55,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642566229] [2021-11-20 05:31:55,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642566229] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:31:55,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379897465] [2021-11-20 05:31:55,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:31:55,379 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:31:55,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dcdd98b-7e1b-4e88-97f2-e7a15f74ab5b/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:31:55,381 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dcdd98b-7e1b-4e88-97f2-e7a15f74ab5b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:31:55,387 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dcdd98b-7e1b-4e88-97f2-e7a15f74ab5b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 05:31:55,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:31:55,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-20 05:31:55,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:31:55,871 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 05:31:55,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:31:56,169 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 05:31:56,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379897465] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:31:56,169 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:31:56,169 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2021-11-20 05:31:56,170 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961705748] [2021-11-20 05:31:56,170 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:31:56,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-20 05:31:56,171 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:31:56,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-20 05:31:56,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-11-20 05:31:56,172 INFO L87 Difference]: Start difference. First operand 46 states and 56 transitions. Second operand has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 13 states have internal predecessors, (58), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (12), 3 states have call predecessors, (12), 4 states have call successors, (12) [2021-11-20 05:31:56,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:31:56,400 INFO L93 Difference]: Finished difference Result 73 states and 90 transitions. [2021-11-20 05:31:56,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 05:31:56,401 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 13 states have internal predecessors, (58), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (12), 3 states have call predecessors, (12), 4 states have call successors, (12) Word has length 46 [2021-11-20 05:31:56,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:31:56,403 INFO L225 Difference]: With dead ends: 73 [2021-11-20 05:31:56,403 INFO L226 Difference]: Without dead ends: 50 [2021-11-20 05:31:56,404 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-11-20 05:31:56,405 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 37 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 05:31:56,406 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 263 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 05:31:56,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-11-20 05:31:56,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2021-11-20 05:31:56,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 35 states have internal predecessors, (38), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-20 05:31:56,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 58 transitions. [2021-11-20 05:31:56,414 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 58 transitions. Word has length 46 [2021-11-20 05:31:56,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:31:56,415 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 58 transitions. [2021-11-20 05:31:56,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 13 states have internal predecessors, (58), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (12), 3 states have call predecessors, (12), 4 states have call successors, (12) [2021-11-20 05:31:56,415 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 58 transitions. [2021-11-20 05:31:56,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-20 05:31:56,417 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:31:56,417 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:31:56,455 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dcdd98b-7e1b-4e88-97f2-e7a15f74ab5b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 05:31:56,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dcdd98b-7e1b-4e88-97f2-e7a15f74ab5b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:31:56,637 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:31:56,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:31:56,638 INFO L85 PathProgramCache]: Analyzing trace with hash 1298139546, now seen corresponding path program 2 times [2021-11-20 05:31:56,638 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:31:56,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090492350] [2021-11-20 05:31:56,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:31:56,638 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:31:56,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:31:57,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 05:31:57,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:31:57,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-20 05:31:57,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:31:57,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-20 05:31:57,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:31:57,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-20 05:31:57,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:31:57,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-20 05:31:57,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:31:57,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-20 05:31:57,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:31:59,181 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-20 05:31:59,182 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:31:59,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090492350] [2021-11-20 05:31:59,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090492350] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:31:59,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500967236] [2021-11-20 05:31:59,183 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 05:31:59,183 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:31:59,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dcdd98b-7e1b-4e88-97f2-e7a15f74ab5b/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:31:59,188 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dcdd98b-7e1b-4e88-97f2-e7a15f74ab5b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:31:59,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dcdd98b-7e1b-4e88-97f2-e7a15f74ab5b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 05:31:59,292 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 05:31:59,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:31:59,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-20 05:31:59,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:31:59,532 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 16 treesize of output 12 [2021-11-20 05:32:03,758 INFO L354 Elim1Store]: treesize reduction 57, result has 19.7 percent of original size [2021-11-20 05:32:03,759 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 3 case distinctions, treesize of input 76 treesize of output 41 [2021-11-20 05:32:04,058 INFO L354 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2021-11-20 05:32:04,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 48 [2021-11-20 05:32:04,112 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-20 05:32:04,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:32:04,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500967236] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:32:04,644 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:32:04,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 12] total 29 [2021-11-20 05:32:04,644 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215698130] [2021-11-20 05:32:04,644 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 05:32:04,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-20 05:32:04,645 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:32:04,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-20 05:32:04,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=883, Unknown=2, NotChecked=0, Total=992 [2021-11-20 05:32:04,647 INFO L87 Difference]: Start difference. First operand 48 states and 58 transitions. Second operand has 29 states, 26 states have (on average 2.076923076923077) internal successors, (54), 24 states have internal predecessors, (54), 7 states have call successors, (10), 2 states have call predecessors, (10), 6 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2021-11-20 05:32:07,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:32:07,173 INFO L93 Difference]: Finished difference Result 67 states and 85 transitions. [2021-11-20 05:32:07,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-20 05:32:07,178 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 26 states have (on average 2.076923076923077) internal successors, (54), 24 states have internal predecessors, (54), 7 states have call successors, (10), 2 states have call predecessors, (10), 6 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) Word has length 48 [2021-11-20 05:32:07,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:32:07,182 INFO L225 Difference]: With dead ends: 67 [2021-11-20 05:32:07,182 INFO L226 Difference]: Without dead ends: 65 [2021-11-20 05:32:07,183 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=215, Invalid=1675, Unknown=2, NotChecked=0, Total=1892 [2021-11-20 05:32:07,185 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 50 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 524 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 94 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:32:07,185 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 345 Invalid, 700 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 524 Invalid, 0 Unknown, 94 Unchecked, 1.0s Time] [2021-11-20 05:32:07,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-11-20 05:32:07,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 53. [2021-11-20 05:32:07,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 37 states have (on average 1.135135135135135) internal successors, (42), 38 states have internal predecessors, (42), 10 states have call successors, (10), 4 states have call predecessors, (10), 5 states have return successors, (13), 11 states have call predecessors, (13), 10 states have call successors, (13) [2021-11-20 05:32:07,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 65 transitions. [2021-11-20 05:32:07,197 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 65 transitions. Word has length 48 [2021-11-20 05:32:07,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:32:07,197 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 65 transitions. [2021-11-20 05:32:07,198 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 26 states have (on average 2.076923076923077) internal successors, (54), 24 states have internal predecessors, (54), 7 states have call successors, (10), 2 states have call predecessors, (10), 6 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2021-11-20 05:32:07,198 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 65 transitions. [2021-11-20 05:32:07,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-20 05:32:07,199 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:32:07,199 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:32:07,229 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dcdd98b-7e1b-4e88-97f2-e7a15f74ab5b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 05:32:07,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dcdd98b-7e1b-4e88-97f2-e7a15f74ab5b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:32:07,416 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:32:07,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:32:07,416 INFO L85 PathProgramCache]: Analyzing trace with hash 736701521, now seen corresponding path program 1 times [2021-11-20 05:32:07,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:32:07,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556942424] [2021-11-20 05:32:07,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:32:07,417 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:32:07,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:07,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 05:32:07,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:07,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-20 05:32:07,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:07,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-20 05:32:07,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:07,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-20 05:32:07,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:07,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-20 05:32:07,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:07,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-20 05:32:07,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:07,639 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-20 05:32:07,639 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:32:07,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556942424] [2021-11-20 05:32:07,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556942424] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:32:07,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189447710] [2021-11-20 05:32:07,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:32:07,640 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:32:07,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dcdd98b-7e1b-4e88-97f2-e7a15f74ab5b/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:32:07,641 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dcdd98b-7e1b-4e88-97f2-e7a15f74ab5b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:32:07,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dcdd98b-7e1b-4e88-97f2-e7a15f74ab5b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 05:32:07,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:07,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 91 conjunts are in the unsatisfiable core [2021-11-20 05:32:07,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:32:07,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 05:32:07,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2021-11-20 05:32:07,928 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 05:32:07,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-20 05:32:08,006 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 14 treesize of output 16 [2021-11-20 05:32:08,119 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 0 case distinctions, treesize of input 36 treesize of output 32 [2021-11-20 05:32:08,239 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 0 case distinctions, treesize of input 36 treesize of output 32 [2021-11-20 05:32:10,500 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 0 case distinctions, treesize of input 76 treesize of output 70 [2021-11-20 05:32:10,637 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 0 case distinctions, treesize of input 39 treesize of output 37 [2021-11-20 05:32:11,777 WARN L860 $PredicateComparison]: unable to prove that (exists ((downsweep_~tmp~0 Int)) (= |c_#memory_int| (store |c_old(#memory_int)| |c_downsweep_#in~a.base| (let ((.cse2 (+ |c_downsweep_#in~a.offset| (* |c_downsweep_#in~left| 4)))) (store (let ((.cse1 (+ (* |c_downsweep_#in~right| 4) |c_downsweep_#in~a.offset|)) (.cse0 (select |c_old(#memory_int)| |c_downsweep_#in~a.base|))) (store .cse0 .cse1 (+ (select .cse0 .cse1) (select .cse0 .cse2)))) .cse2 downsweep_~tmp~0))))) is different from true [2021-11-20 05:32:11,808 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 0 case distinctions, treesize of input 77 treesize of output 71 [2021-11-20 05:32:17,967 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 05:32:17,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 100 treesize of output 88 [2021-11-20 05:32:18,036 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 05:32:18,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:32:47,060 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse4 (= (mod |c_ULTIMATE.start_main_~n~0#1| 2) 0))) (and (or (forall ((|ULTIMATE.start_check_~a0#1.offset| Int) (v_downsweep_~tmp~0_10 Int)) (let ((.cse0 (let ((.cse3 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* (div |c_ULTIMATE.start_main_~n~0#1| 2) 4)))) (store (let ((.cse2 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (- 4) (* |c_ULTIMATE.start_main_~n~0#1| 4))) (.cse1 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|))) (store .cse1 .cse2 (+ (select .cse1 .cse2) (select .cse1 .cse3)))) .cse3 v_downsweep_~tmp~0_10)))) (= (select .cse0 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse0) |c_ULTIMATE.start_main_~a0~0#1.base|) |ULTIMATE.start_check_~a0#1.offset|)))) .cse4 (<= 0 |c_ULTIMATE.start_main_~n~0#1|)) (or (forall ((|ULTIMATE.start_check_~a0#1.offset| Int) (v_downsweep_~tmp~0_10 Int)) (let ((.cse5 (let ((.cse8 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (- 4) (* (div |c_ULTIMATE.start_main_~n~0#1| 2) 4)))) (store (let ((.cse6 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse7 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (- 4) (* |c_ULTIMATE.start_main_~n~0#1| 4)))) (store .cse6 .cse7 (+ (select .cse6 .cse8) (select .cse6 .cse7)))) .cse8 v_downsweep_~tmp~0_10)))) (= (select .cse5 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse5) |c_ULTIMATE.start_main_~a0~0#1.base|) |ULTIMATE.start_check_~a0#1.offset|)))) (and (not .cse4) (< |c_ULTIMATE.start_main_~n~0#1| 0))))) is different from false [2021-11-20 05:32:47,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189447710] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:32:47,064 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:32:47,064 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 24] total 31 [2021-11-20 05:32:47,064 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162831106] [2021-11-20 05:32:47,064 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 05:32:47,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-20 05:32:47,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:32:47,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-20 05:32:47,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1012, Unknown=16, NotChecked=130, Total=1260 [2021-11-20 05:32:47,066 INFO L87 Difference]: Start difference. First operand 53 states and 65 transitions. Second operand has 31 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 26 states have internal predecessors, (65), 6 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (11), 7 states have call predecessors, (11), 6 states have call successors, (11) [2021-11-20 05:32:49,130 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-20 05:32:59,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:32:59,861 INFO L93 Difference]: Finished difference Result 122 states and 156 transitions. [2021-11-20 05:32:59,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-20 05:32:59,861 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 26 states have internal predecessors, (65), 6 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (11), 7 states have call predecessors, (11), 6 states have call successors, (11) Word has length 52 [2021-11-20 05:32:59,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:32:59,864 INFO L225 Difference]: With dead ends: 122 [2021-11-20 05:32:59,864 INFO L226 Difference]: Without dead ends: 94 [2021-11-20 05:32:59,866 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 49 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 48.3s TimeCoverageRelationStatistics Valid=234, Invalid=2106, Unknown=20, NotChecked=190, Total=2550 [2021-11-20 05:32:59,867 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 16 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 29 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 279 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-11-20 05:32:59,868 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 374 Invalid, 628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 319 Invalid, 1 Unknown, 279 Unchecked, 2.6s Time] [2021-11-20 05:32:59,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-11-20 05:32:59,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 89. [2021-11-20 05:32:59,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 65 states have (on average 1.1384615384615384) internal successors, (74), 66 states have internal predecessors, (74), 15 states have call successors, (15), 7 states have call predecessors, (15), 8 states have return successors, (22), 16 states have call predecessors, (22), 15 states have call successors, (22) [2021-11-20 05:32:59,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 111 transitions. [2021-11-20 05:32:59,885 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 111 transitions. Word has length 52 [2021-11-20 05:32:59,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:32:59,885 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 111 transitions. [2021-11-20 05:32:59,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 26 states have internal predecessors, (65), 6 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (11), 7 states have call predecessors, (11), 6 states have call successors, (11) [2021-11-20 05:32:59,886 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 111 transitions. [2021-11-20 05:32:59,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-20 05:32:59,887 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:32:59,888 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:32:59,924 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dcdd98b-7e1b-4e88-97f2-e7a15f74ab5b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-20 05:33:00,102 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dcdd98b-7e1b-4e88-97f2-e7a15f74ab5b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:33:00,103 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:33:00,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:33:00,103 INFO L85 PathProgramCache]: Analyzing trace with hash -362686961, now seen corresponding path program 2 times [2021-11-20 05:33:00,103 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:33:00,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471545968] [2021-11-20 05:33:00,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:33:00,104 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:33:00,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:33:00,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 05:33:00,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:33:00,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-20 05:33:00,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:33:00,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-20 05:33:00,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:33:00,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-20 05:33:00,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:33:00,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-11-20 05:33:00,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:33:00,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-20 05:33:00,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:33:00,264 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-20 05:33:00,264 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:33:00,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471545968] [2021-11-20 05:33:00,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471545968] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:33:00,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335162082] [2021-11-20 05:33:00,266 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 05:33:00,266 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:33:00,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dcdd98b-7e1b-4e88-97f2-e7a15f74ab5b/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:33:00,272 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dcdd98b-7e1b-4e88-97f2-e7a15f74ab5b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:33:00,294 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dcdd98b-7e1b-4e88-97f2-e7a15f74ab5b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 05:33:00,352 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 05:33:00,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:33:00,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-20 05:33:00,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:33:00,551 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-20 05:33:00,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:33:00,864 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-20 05:33:00,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335162082] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:33:00,865 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:33:00,865 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 15 [2021-11-20 05:33:00,865 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57073716] [2021-11-20 05:33:00,865 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:33:00,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-20 05:33:00,866 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:33:00,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-20 05:33:00,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-11-20 05:33:00,867 INFO L87 Difference]: Start difference. First operand 89 states and 111 transitions. Second operand has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-20 05:33:01,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:33:01,374 INFO L93 Difference]: Finished difference Result 125 states and 154 transitions. [2021-11-20 05:33:01,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-20 05:33:01,375 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 54 [2021-11-20 05:33:01,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:33:01,376 INFO L225 Difference]: With dead ends: 125 [2021-11-20 05:33:01,376 INFO L226 Difference]: Without dead ends: 98 [2021-11-20 05:33:01,379 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 112 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-11-20 05:33:01,382 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 41 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 358 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 05:33:01,382 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 406 Invalid, 381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 358 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-20 05:33:01,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-11-20 05:33:01,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 91. [2021-11-20 05:33:01,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 66 states have (on average 1.121212121212121) internal successors, (74), 66 states have internal predecessors, (74), 16 states have call successors, (16), 7 states have call predecessors, (16), 8 states have return successors, (23), 17 states have call predecessors, (23), 16 states have call successors, (23) [2021-11-20 05:33:01,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 113 transitions. [2021-11-20 05:33:01,418 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 113 transitions. Word has length 54 [2021-11-20 05:33:01,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:33:01,420 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 113 transitions. [2021-11-20 05:33:01,421 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-20 05:33:01,421 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 113 transitions. [2021-11-20 05:33:01,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-20 05:33:01,429 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:33:01,429 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:33:01,467 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dcdd98b-7e1b-4e88-97f2-e7a15f74ab5b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-20 05:33:01,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dcdd98b-7e1b-4e88-97f2-e7a15f74ab5b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-20 05:33:01,644 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:33:01,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:33:01,644 INFO L85 PathProgramCache]: Analyzing trace with hash -1333958502, now seen corresponding path program 1 times [2021-11-20 05:33:01,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:33:01,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377720785] [2021-11-20 05:33:01,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:33:01,644 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:33:01,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:33:01,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 05:33:01,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:33:01,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 05:33:01,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:33:01,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-20 05:33:01,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:33:01,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-20 05:33:01,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:33:01,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-20 05:33:01,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:33:01,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-11-20 05:33:01,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:33:01,817 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-20 05:33:01,817 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:33:01,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377720785] [2021-11-20 05:33:01,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377720785] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:33:01,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806452895] [2021-11-20 05:33:01,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:33:01,818 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:33:01,818 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dcdd98b-7e1b-4e88-97f2-e7a15f74ab5b/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:33:01,819 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dcdd98b-7e1b-4e88-97f2-e7a15f74ab5b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:33:01,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dcdd98b-7e1b-4e88-97f2-e7a15f74ab5b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-20 05:33:01,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:33:01,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-20 05:33:01,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:33:02,125 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 05:33:02,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:33:02,253 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 05:33:02,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806452895] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:33:02,254 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:33:02,254 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 16 [2021-11-20 05:33:02,254 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454517027] [2021-11-20 05:33:02,254 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:33:02,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-20 05:33:02,255 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:33:02,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-20 05:33:02,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-11-20 05:33:02,256 INFO L87 Difference]: Start difference. First operand 91 states and 113 transitions. Second operand has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 states have internal predecessors, (63), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-20 05:33:04,291 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-20 05:33:04,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:33:04,785 INFO L93 Difference]: Finished difference Result 127 states and 152 transitions. [2021-11-20 05:33:04,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-20 05:33:04,785 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 states have internal predecessors, (63), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 57 [2021-11-20 05:33:04,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:33:04,787 INFO L225 Difference]: With dead ends: 127 [2021-11-20 05:33:04,787 INFO L226 Difference]: Without dead ends: 111 [2021-11-20 05:33:04,788 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2021-11-20 05:33:04,789 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 66 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 26 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 405 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-20 05:33:04,789 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 405 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 203 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-20 05:33:04,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-11-20 05:33:04,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 93. [2021-11-20 05:33:04,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 68 states have (on average 1.1323529411764706) internal successors, (77), 68 states have internal predecessors, (77), 16 states have call successors, (16), 7 states have call predecessors, (16), 8 states have return successors, (22), 17 states have call predecessors, (22), 16 states have call successors, (22) [2021-11-20 05:33:04,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 115 transitions. [2021-11-20 05:33:04,811 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 115 transitions. Word has length 57 [2021-11-20 05:33:04,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:33:04,811 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 115 transitions. [2021-11-20 05:33:04,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 states have internal predecessors, (63), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-20 05:33:04,812 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 115 transitions. [2021-11-20 05:33:04,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-20 05:33:04,815 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:33:04,815 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:33:04,852 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dcdd98b-7e1b-4e88-97f2-e7a15f74ab5b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-20 05:33:05,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dcdd98b-7e1b-4e88-97f2-e7a15f74ab5b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:33:05,040 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:33:05,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:33:05,040 INFO L85 PathProgramCache]: Analyzing trace with hash 33191180, now seen corresponding path program 1 times [2021-11-20 05:33:05,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:33:05,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560409758] [2021-11-20 05:33:05,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:33:05,041 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:33:05,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:33:05,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 05:33:05,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:33:05,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 05:33:05,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:33:05,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-20 05:33:05,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:33:05,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-20 05:33:05,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:33:05,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-20 05:33:05,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:33:05,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-11-20 05:33:05,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:33:05,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 05:33:05,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:33:05,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 05:33:05,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:33:05,228 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-20 05:33:05,229 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:33:05,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560409758] [2021-11-20 05:33:05,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560409758] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:33:05,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794534836] [2021-11-20 05:33:05,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:33:05,230 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:33:05,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dcdd98b-7e1b-4e88-97f2-e7a15f74ab5b/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:33:05,231 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dcdd98b-7e1b-4e88-97f2-e7a15f74ab5b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:33:05,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dcdd98b-7e1b-4e88-97f2-e7a15f74ab5b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-20 05:33:05,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:33:05,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-20 05:33:05,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:33:05,653 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-20 05:33:05,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:33:06,474 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-20 05:33:06,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794534836] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:33:06,475 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:33:06,475 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 7] total 21 [2021-11-20 05:33:06,475 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271252763] [2021-11-20 05:33:06,475 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:33:06,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-20 05:33:06,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:33:06,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-20 05:33:06,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-11-20 05:33:06,477 INFO L87 Difference]: Start difference. First operand 93 states and 115 transitions. Second operand has 21 states, 20 states have (on average 3.05) internal successors, (61), 20 states have internal predecessors, (61), 7 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (15), 6 states have call predecessors, (15), 7 states have call successors, (15) [2021-11-20 05:33:07,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:33:07,177 INFO L93 Difference]: Finished difference Result 109 states and 133 transitions. [2021-11-20 05:33:07,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-20 05:33:07,178 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 3.05) internal successors, (61), 20 states have internal predecessors, (61), 7 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (15), 6 states have call predecessors, (15), 7 states have call successors, (15) Word has length 59 [2021-11-20 05:33:07,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:33:07,180 INFO L225 Difference]: With dead ends: 109 [2021-11-20 05:33:07,180 INFO L226 Difference]: Without dead ends: 98 [2021-11-20 05:33:07,181 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 125 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=132, Invalid=798, Unknown=0, NotChecked=0, Total=930 [2021-11-20 05:33:07,181 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 93 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 447 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 447 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 05:33:07,182 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 381 Invalid, 491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 447 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-20 05:33:07,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-11-20 05:33:07,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 95. [2021-11-20 05:33:07,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 68 states have (on average 1.1323529411764706) internal successors, (77), 69 states have internal predecessors, (77), 17 states have call successors, (17), 8 states have call predecessors, (17), 9 states have return successors, (23), 17 states have call predecessors, (23), 17 states have call successors, (23) [2021-11-20 05:33:07,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 117 transitions. [2021-11-20 05:33:07,209 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 117 transitions. Word has length 59 [2021-11-20 05:33:07,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:33:07,209 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 117 transitions. [2021-11-20 05:33:07,209 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 3.05) internal successors, (61), 20 states have internal predecessors, (61), 7 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (15), 6 states have call predecessors, (15), 7 states have call successors, (15) [2021-11-20 05:33:07,209 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 117 transitions. [2021-11-20 05:33:07,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-20 05:33:07,211 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:33:07,211 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:33:07,241 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dcdd98b-7e1b-4e88-97f2-e7a15f74ab5b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-20 05:33:07,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dcdd98b-7e1b-4e88-97f2-e7a15f74ab5b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:33:07,436 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:33:07,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:33:07,436 INFO L85 PathProgramCache]: Analyzing trace with hash 1099509749, now seen corresponding path program 1 times [2021-11-20 05:33:07,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:33:07,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318292209] [2021-11-20 05:33:07,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:33:07,437 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:33:07,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:33:07,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 05:33:07,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:33:07,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 05:33:07,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:33:07,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-20 05:33:07,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:33:07,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-20 05:33:07,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:33:07,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-20 05:33:07,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:33:07,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 05:33:07,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:33:07,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 05:33:07,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:33:07,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-11-20 05:33:07,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:33:07,627 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-20 05:33:07,627 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:33:07,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318292209] [2021-11-20 05:33:07,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318292209] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:33:07,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339566305] [2021-11-20 05:33:07,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:33:07,628 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:33:07,628 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dcdd98b-7e1b-4e88-97f2-e7a15f74ab5b/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:33:07,629 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dcdd98b-7e1b-4e88-97f2-e7a15f74ab5b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:33:07,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dcdd98b-7e1b-4e88-97f2-e7a15f74ab5b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-20 05:33:07,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:33:07,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-20 05:33:07,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:33:07,957 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-20 05:33:07,957 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:33:08,670 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-20 05:33:08,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339566305] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:33:08,670 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:33:08,671 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2021-11-20 05:33:08,671 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794319150] [2021-11-20 05:33:08,671 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:33:08,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-20 05:33:08,672 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:33:08,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-20 05:33:08,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2021-11-20 05:33:08,673 INFO L87 Difference]: Start difference. First operand 95 states and 117 transitions. Second operand has 20 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 19 states have internal predecessors, (62), 7 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (15), 5 states have call predecessors, (15), 7 states have call successors, (15) [2021-11-20 05:33:08,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:33:08,890 INFO L93 Difference]: Finished difference Result 110 states and 134 transitions. [2021-11-20 05:33:08,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-20 05:33:08,891 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 19 states have internal predecessors, (62), 7 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (15), 5 states have call predecessors, (15), 7 states have call successors, (15) Word has length 65 [2021-11-20 05:33:08,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:33:08,892 INFO L225 Difference]: With dead ends: 110 [2021-11-20 05:33:08,892 INFO L226 Difference]: Without dead ends: 77 [2021-11-20 05:33:08,893 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 132 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2021-11-20 05:33:08,894 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 22 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 05:33:08,894 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 175 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 05:33:08,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-11-20 05:33:08,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 62. [2021-11-20 05:33:08,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 44 states have (on average 1.1136363636363635) internal successors, (49), 44 states have internal predecessors, (49), 10 states have call successors, (10), 7 states have call predecessors, (10), 7 states have return successors, (14), 10 states have call predecessors, (14), 10 states have call successors, (14) [2021-11-20 05:33:08,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 73 transitions. [2021-11-20 05:33:08,903 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 73 transitions. Word has length 65 [2021-11-20 05:33:08,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:33:08,904 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 73 transitions. [2021-11-20 05:33:08,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 19 states have internal predecessors, (62), 7 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (15), 5 states have call predecessors, (15), 7 states have call successors, (15) [2021-11-20 05:33:08,904 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 73 transitions. [2021-11-20 05:33:08,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-20 05:33:08,905 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:33:08,905 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:33:08,943 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dcdd98b-7e1b-4e88-97f2-e7a15f74ab5b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-20 05:33:09,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dcdd98b-7e1b-4e88-97f2-e7a15f74ab5b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-11-20 05:33:09,132 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:33:09,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:33:09,132 INFO L85 PathProgramCache]: Analyzing trace with hash 1124650442, now seen corresponding path program 1 times [2021-11-20 05:33:09,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:33:09,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709214033] [2021-11-20 05:33:09,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:33:09,133 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:33:09,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:33:09,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 05:33:09,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:33:09,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-20 05:33:09,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:33:09,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-20 05:33:09,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:33:09,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-20 05:33:09,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:33:09,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-11-20 05:33:09,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:33:09,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 05:33:09,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:33:09,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 05:33:09,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:33:09,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-11-20 05:33:09,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:33:09,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 05:33:09,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:33:09,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 05:33:09,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:33:09,493 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-20 05:33:09,494 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:33:09,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709214033] [2021-11-20 05:33:09,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709214033] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:33:09,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844182893] [2021-11-20 05:33:09,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:33:09,495 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:33:09,495 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dcdd98b-7e1b-4e88-97f2-e7a15f74ab5b/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:33:09,500 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dcdd98b-7e1b-4e88-97f2-e7a15f74ab5b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:33:09,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dcdd98b-7e1b-4e88-97f2-e7a15f74ab5b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-20 05:33:09,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:33:09,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 145 conjunts are in the unsatisfiable core [2021-11-20 05:33:09,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:33:09,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 05:33:09,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2021-11-20 05:33:09,800 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 05:33:09,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-20 05:33:09,878 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 14 treesize of output 16 [2021-11-20 05:33:09,987 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 0 case distinctions, treesize of input 36 treesize of output 32 [2021-11-20 05:33:10,097 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 0 case distinctions, treesize of input 36 treesize of output 32 [2021-11-20 05:33:10,250 INFO L354 Elim1Store]: treesize reduction 36, result has 12.2 percent of original size [2021-11-20 05:33:10,251 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 40 treesize of output 36 [2021-11-20 05:33:18,666 WARN L860 $PredicateComparison]: unable to prove that (exists ((upsweep_~left Int) (upsweep_~right Int) (upsweep_~a.offset Int)) (and (<= |c_upsweep_#in~right| upsweep_~right) (<= |c_upsweep_#in~a.offset| upsweep_~a.offset) (= |c_#memory_int| (store |c_old(#memory_int)| |c_upsweep_#in~a.base| (let ((.cse0 (select |c_old(#memory_int)| |c_upsweep_#in~a.base|)) (.cse1 (+ (* upsweep_~right 4) upsweep_~a.offset))) (store .cse0 .cse1 (+ (select .cse0 (+ (* upsweep_~left 4) upsweep_~a.offset)) (select .cse0 .cse1)))))))) is different from true [2021-11-20 05:33:24,397 WARN L860 $PredicateComparison]: unable to prove that (exists ((upsweep_~left Int)) (= |c_#memory_int| (store |c_old(#memory_int)| |c_upsweep_#in~a.base| (let ((.cse0 (select |c_old(#memory_int)| |c_upsweep_#in~a.base|)) (.cse1 (+ (* |c_upsweep_#in~right| 4) |c_upsweep_#in~a.offset|))) (store .cse0 .cse1 (+ (select .cse0 (+ (* upsweep_~left 4) |c_upsweep_#in~a.offset|)) (select .cse0 .cse1))))))) is different from true [2021-11-20 05:33:39,447 INFO L354 Elim1Store]: treesize reduction 202, result has 2.4 percent of original size [2021-11-20 05:33:39,447 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 270 treesize of output 232 [2021-11-20 05:33:39,690 INFO L354 Elim1Store]: treesize reduction 31, result has 13.9 percent of original size [2021-11-20 05:33:39,690 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 44 treesize of output 40 [2021-11-20 05:33:41,884 WARN L860 $PredicateComparison]: unable to prove that (exists ((downsweep_~left Int) (downsweep_~tmp~0 Int)) (and (<= downsweep_~left |c_downsweep_#in~left|) (= |c_#memory_int| (store |c_old(#memory_int)| |c_downsweep_#in~a.base| (let ((.cse2 (+ (* downsweep_~left 4) |c_downsweep_#in~a.offset|))) (store (let ((.cse1 (+ (* |c_downsweep_#in~right| 4) |c_downsweep_#in~a.offset|)) (.cse0 (select |c_old(#memory_int)| |c_downsweep_#in~a.base|))) (store .cse0 .cse1 (+ (select .cse0 .cse1) (select .cse0 .cse2)))) .cse2 downsweep_~tmp~0)))))) is different from true [2021-11-20 05:33:48,012 WARN L860 $PredicateComparison]: unable to prove that (exists ((downsweep_~left Int) (downsweep_~tmp~0 Int)) (and (<= |c_downsweep_#in~left| downsweep_~left) (= |c_#memory_int| (store |c_old(#memory_int)| |c_downsweep_#in~a.base| (let ((.cse2 (+ (* downsweep_~left 4) |c_downsweep_#in~a.offset|))) (store (let ((.cse1 (+ (* |c_downsweep_#in~right| 4) |c_downsweep_#in~a.offset|)) (.cse0 (select |c_old(#memory_int)| |c_downsweep_#in~a.base|))) (store .cse0 .cse1 (+ (select .cse0 .cse1) (select .cse0 .cse2)))) .cse2 downsweep_~tmp~0)))))) is different from true [2021-11-20 05:33:54,654 INFO L354 Elim1Store]: treesize reduction 536, result has 0.9 percent of original size [2021-11-20 05:33:54,655 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 722 treesize of output 672 [2021-11-20 05:33:57,467 WARN L860 $PredicateComparison]: unable to prove that (and (exists ((|aux_div_aux_div_aux_mod_aux_mod_ULTIMATE.start_main_~n~0#1_36_97_119_137| Int) (|aux_mod_aux_div_aux_mod_aux_mod_ULTIMATE.start_main_~n~0#1_36_97_119_137| Int) (v_downsweep_~tmp~0_37 Int) (v_downsweep_~left_41 Int) (downsweep_~left Int) (downsweep_~tmp~0 Int) (|aux_mod_aux_mod_aux_mod_aux_mod_ULTIMATE.start_main_~n~0#1_36_97_119_307| Int) (|aux_div_aux_mod_aux_mod_aux_mod_ULTIMATE.start_main_~n~0#1_36_97_119_307| Int) (|aux_div_aux_mod_ULTIMATE.start_main_~n~0#1_36_97| Int) (|aux_div_ULTIMATE.start_main_~n~0#1_36| Int)) (let ((.cse11 (* 2 |aux_div_aux_mod_aux_mod_aux_mod_ULTIMATE.start_main_~n~0#1_36_97_119_307|))) (let ((.cse1 (+ .cse11 |aux_mod_aux_mod_aux_mod_aux_mod_ULTIMATE.start_main_~n~0#1_36_97_119_307|)) (.cse0 (+ .cse11 |aux_mod_aux_mod_aux_mod_aux_mod_ULTIMATE.start_main_~n~0#1_36_97_119_307| |aux_div_aux_mod_ULTIMATE.start_main_~n~0#1_36_97|)) (.cse2 (+ (* 4 |aux_div_aux_div_aux_mod_aux_mod_ULTIMATE.start_main_~n~0#1_36_97_119_137|) (* 2 |aux_mod_aux_div_aux_mod_aux_mod_ULTIMATE.start_main_~n~0#1_36_97_119_137|)))) (and (<= 0 |aux_mod_aux_mod_aux_mod_aux_mod_ULTIMATE.start_main_~n~0#1_36_97_119_307|) (<= 0 |aux_mod_aux_div_aux_mod_aux_mod_ULTIMATE.start_main_~n~0#1_36_97_119_137|) (< |aux_mod_aux_mod_aux_mod_aux_mod_ULTIMATE.start_main_~n~0#1_36_97_119_307| 2) (<= (+ (* 3 |aux_div_aux_div_aux_mod_aux_mod_ULTIMATE.start_main_~n~0#1_36_97_119_137|) |aux_mod_aux_div_aux_mod_aux_mod_ULTIMATE.start_main_~n~0#1_36_97_119_137| 1 v_downsweep_~left_41) .cse0) (< .cse1 (+ 2 |aux_div_aux_mod_ULTIMATE.start_main_~n~0#1_36_97|)) (<= .cse0 .cse2) (< |aux_mod_aux_div_aux_mod_aux_mod_ULTIMATE.start_main_~n~0#1_36_97_119_137| 2) (<= (+ |aux_div_aux_mod_aux_mod_aux_mod_ULTIMATE.start_main_~n~0#1_36_97_119_307| |aux_mod_aux_mod_aux_mod_aux_mod_ULTIMATE.start_main_~n~0#1_36_97_119_307| |aux_div_aux_mod_ULTIMATE.start_main_~n~0#1_36_97|) (+ downsweep_~left 1)) (< .cse0 (+ (* 2 |aux_div_ULTIMATE.start_main_~n~0#1_36|) 2)) (<= .cse0 3) (= (let ((.cse5 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* downsweep_~left 4)))) (store (let ((.cse4 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |aux_div_aux_mod_aux_mod_aux_mod_ULTIMATE.start_main_~n~0#1_36_97_119_307| 8) (- 4) (* |aux_div_aux_mod_ULTIMATE.start_main_~n~0#1_36_97| 4) (* |aux_mod_aux_mod_aux_mod_aux_mod_ULTIMATE.start_main_~n~0#1_36_97_119_307| 4)))) (let ((.cse3 (let ((.cse9 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* v_downsweep_~left_41 4)))) (store (let ((.cse10 ((as const (Array Int Int)) 0))) (let ((.cse8 (select .cse10 .cse4)) (.cse7 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* (div (+ (* |aux_div_aux_mod_aux_mod_aux_mod_ULTIMATE.start_main_~n~0#1_36_97_119_307| 2) |aux_mod_aux_mod_aux_mod_aux_mod_ULTIMATE.start_main_~n~0#1_36_97_119_307| |aux_div_aux_mod_ULTIMATE.start_main_~n~0#1_36_97|) 2) 4) (- 4)))) (let ((.cse6 (store .cse10 .cse4 (+ .cse8 (select .cse10 .cse7))))) (store .cse6 .cse7 (+ .cse8 (select (store .cse6 .cse7 .cse8) .cse9)))))) .cse9 downsweep_~tmp~0)))) (store .cse3 .cse4 (+ (select .cse3 .cse5) (select .cse3 .cse4))))) .cse5 v_downsweep_~tmp~0_37)) (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|)) (<= |aux_div_aux_mod_ULTIMATE.start_main_~n~0#1_36_97| .cse1) (< (+ |aux_div_ULTIMATE.start_main_~n~0#1_36| 1) .cse0) (< .cse2 (+ .cse11 2 |aux_mod_aux_mod_aux_mod_aux_mod_ULTIMATE.start_main_~n~0#1_36_97_119_307| |aux_div_aux_mod_ULTIMATE.start_main_~n~0#1_36_97|)))))) (exists ((|ULTIMATE.start_main_~a0~0#1.base| Int) (|ULTIMATE.start_main_~a0~0#1.offset| Int)) (and (= (select |c_#memory_int| |ULTIMATE.start_main_~a0~0#1.base|) (let ((.cse12 ((as const (Array Int Int)) 0))) (store .cse12 (+ |ULTIMATE.start_main_~a0~0#1.offset| 8) (select .cse12 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 8))))) (not (= |ULTIMATE.start_main_~a0~0#1.base| |c_ULTIMATE.start_main_~a~0#1.base|))))) is different from true [2021-11-20 05:34:02,513 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 05:34:02,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 699 treesize of output 691 [2021-11-20 05:34:02,763 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 15 not checked. [2021-11-20 05:34:02,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:34:08,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844182893] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:34:08,727 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:34:08,727 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 34] total 45 [2021-11-20 05:34:08,727 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369834255] [2021-11-20 05:34:08,727 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 05:34:08,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-11-20 05:34:08,728 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:34:08,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-11-20 05:34:08,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1686, Unknown=15, NotChecked=430, Total=2256 [2021-11-20 05:34:08,729 INFO L87 Difference]: Start difference. First operand 62 states and 73 transitions. Second operand has 45 states, 38 states have (on average 2.1315789473684212) internal successors, (81), 37 states have internal predecessors, (81), 11 states have call successors, (19), 3 states have call predecessors, (19), 10 states have return successors, (19), 11 states have call predecessors, (19), 11 states have call successors, (19) [2021-11-20 05:34:10,957 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-20 05:34:20,790 WARN L860 $PredicateComparison]: unable to prove that (and (exists ((upsweep_~left Int)) (= |c_#memory_int| (store |c_old(#memory_int)| |c_upsweep_#in~a.base| (let ((.cse0 (select |c_old(#memory_int)| |c_upsweep_#in~a.base|)) (.cse1 (+ (* |c_upsweep_#in~right| 4) |c_upsweep_#in~a.offset|))) (store .cse0 .cse1 (+ (select .cse0 (+ (* upsweep_~left 4) |c_upsweep_#in~a.offset|)) (select .cse0 .cse1))))))) (exists ((upsweep_~left Int) (upsweep_~right Int) (upsweep_~a.offset Int)) (and (<= |c_upsweep_#in~right| upsweep_~right) (<= |c_upsweep_#in~a.offset| upsweep_~a.offset) (= |c_#memory_int| (store |c_old(#memory_int)| |c_upsweep_#in~a.base| (let ((.cse2 (select |c_old(#memory_int)| |c_upsweep_#in~a.base|)) (.cse3 (+ (* upsweep_~right 4) upsweep_~a.offset))) (store .cse2 .cse3 (+ (select .cse2 (+ (* upsweep_~left 4) upsweep_~a.offset)) (select .cse2 .cse3))))))))) is different from true [2021-11-20 05:34:25,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:34:25,082 INFO L93 Difference]: Finished difference Result 132 states and 175 transitions. [2021-11-20 05:34:25,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-20 05:34:25,084 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 38 states have (on average 2.1315789473684212) internal successors, (81), 37 states have internal predecessors, (81), 11 states have call successors, (19), 3 states have call predecessors, (19), 10 states have return successors, (19), 11 states have call predecessors, (19), 11 states have call successors, (19) Word has length 72 [2021-11-20 05:34:25,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:34:25,086 INFO L225 Difference]: With dead ends: 132 [2021-11-20 05:34:25,086 INFO L226 Difference]: Without dead ends: 100 [2021-11-20 05:34:25,088 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 58 SyntacticMatches, 6 SemanticMatches, 77 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 1007 ImplicationChecksByTransitivity, 67.3s TimeCoverageRelationStatistics Valid=480, Invalid=4779, Unknown=21, NotChecked=882, Total=6162 [2021-11-20 05:34:25,089 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 44 mSDsluCounter, 466 mSDsCounter, 0 mSdLazyCounter, 911 mSolverCounterSat, 83 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 494 SdHoareTripleChecker+Invalid, 1992 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 911 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 997 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:34:25,089 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 494 Invalid, 1992 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 911 Invalid, 1 Unknown, 997 Unchecked, 3.1s Time] [2021-11-20 05:34:25,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-11-20 05:34:25,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 93. [2021-11-20 05:34:25,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 66 states have (on average 1.106060606060606) internal successors, (73), 66 states have internal predecessors, (73), 17 states have call successors, (17), 7 states have call predecessors, (17), 9 states have return successors, (33), 19 states have call predecessors, (33), 17 states have call successors, (33) [2021-11-20 05:34:25,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 123 transitions. [2021-11-20 05:34:25,116 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 123 transitions. Word has length 72 [2021-11-20 05:34:25,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:34:25,117 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 123 transitions. [2021-11-20 05:34:25,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 38 states have (on average 2.1315789473684212) internal successors, (81), 37 states have internal predecessors, (81), 11 states have call successors, (19), 3 states have call predecessors, (19), 10 states have return successors, (19), 11 states have call predecessors, (19), 11 states have call successors, (19) [2021-11-20 05:34:25,117 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 123 transitions. [2021-11-20 05:34:25,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-20 05:34:25,122 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:34:25,122 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:34:25,155 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dcdd98b-7e1b-4e88-97f2-e7a15f74ab5b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-20 05:34:25,345 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dcdd98b-7e1b-4e88-97f2-e7a15f74ab5b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-20 05:34:25,346 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:34:25,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:34:25,346 INFO L85 PathProgramCache]: Analyzing trace with hash 1763257480, now seen corresponding path program 2 times [2021-11-20 05:34:25,346 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:34:25,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34781002] [2021-11-20 05:34:25,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:34:25,347 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:34:25,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:25,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 05:34:25,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:25,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-20 05:34:25,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:25,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-20 05:34:25,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:25,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-20 05:34:25,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:25,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-20 05:34:25,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:25,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 05:34:25,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:25,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 05:34:25,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:25,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-11-20 05:34:25,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:25,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 05:34:25,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:25,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 05:34:25,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:25,696 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-20 05:34:25,696 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:34:25,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34781002] [2021-11-20 05:34:25,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34781002] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:34:25,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620382236] [2021-11-20 05:34:25,697 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 05:34:25,697 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:34:25,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dcdd98b-7e1b-4e88-97f2-e7a15f74ab5b/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:34:25,698 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dcdd98b-7e1b-4e88-97f2-e7a15f74ab5b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:34:25,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dcdd98b-7e1b-4e88-97f2-e7a15f74ab5b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-20 05:34:25,802 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 05:34:25,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:34:25,807 WARN L261 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 154 conjunts are in the unsatisfiable core [2021-11-20 05:34:25,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:34:25,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 05:34:25,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2021-11-20 05:34:25,986 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 05:34:25,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-20 05:34:26,079 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 14 treesize of output 16 [2021-11-20 05:34:26,164 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 0 case distinctions, treesize of input 36 treesize of output 32 [2021-11-20 05:34:26,246 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 0 case distinctions, treesize of input 36 treesize of output 32 [2021-11-20 05:34:26,340 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 0 case distinctions, treesize of input 36 treesize of output 32 [2021-11-20 05:34:26,437 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 0 case distinctions, treesize of input 42 treesize of output 38 [2021-11-20 05:34:28,563 WARN L860 $PredicateComparison]: unable to prove that (exists ((upsweep_~left Int)) (= |c_#memory_int| (store |c_old(#memory_int)| |c_upsweep_#in~a.base| (let ((.cse0 (select |c_old(#memory_int)| |c_upsweep_#in~a.base|)) (.cse1 (+ (* |c_upsweep_#in~right| 4) |c_upsweep_#in~a.offset|))) (store .cse0 .cse1 (+ (select .cse0 (+ (* upsweep_~left 4) |c_upsweep_#in~a.offset|)) (select .cse0 .cse1))))))) is different from true [2021-11-20 05:34:42,113 WARN L860 $PredicateComparison]: unable to prove that (exists ((upsweep_~right Int) (v_upsweep_~left_39 Int) (v_upsweep_~left_38 Int)) (and (= |c_#memory_int| (store |c_old(#memory_int)| |c_upsweep_#in~a.base| (let ((.cse4 (+ (* |c_upsweep_#in~left| 4) |c_upsweep_#in~a.offset|))) (let ((.cse1 (+ (* upsweep_~right 4) |c_upsweep_#in~a.offset|)) (.cse0 (let ((.cse5 (select |c_old(#memory_int)| |c_upsweep_#in~a.base|))) (store .cse5 .cse4 (+ (select .cse5 .cse4) (select .cse5 (+ (* v_upsweep_~left_38 4) |c_upsweep_#in~a.offset|))))))) (store .cse0 .cse1 (let ((.cse2 (select .cse0 (+ |c_upsweep_#in~a.offset| (* v_upsweep_~left_39 4)))) (.cse3 (select .cse0 .cse1))) (+ (select (store .cse0 .cse1 (+ .cse2 .cse3)) .cse4) .cse2 .cse3))))))) (<= |c_upsweep_#in~right| upsweep_~right))) is different from true [2021-11-20 05:34:42,163 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 0 case distinctions, treesize of input 289 treesize of output 251 [2021-11-20 05:34:42,319 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 0 case distinctions, treesize of input 50 treesize of output 46 [2021-11-20 05:34:56,067 WARN L860 $PredicateComparison]: unable to prove that (exists ((downsweep_~tmp~0 Int)) (= |c_#memory_int| (store |c_old(#memory_int)| |c_downsweep_#in~a.base| (let ((.cse2 (+ |c_downsweep_#in~a.offset| (* |c_downsweep_#in~left| 4)))) (store (let ((.cse1 (+ (* |c_downsweep_#in~right| 4) |c_downsweep_#in~a.offset|)) (.cse0 (select |c_old(#memory_int)| |c_downsweep_#in~a.base|))) (store .cse0 .cse1 (+ (select .cse0 .cse1) (select .cse0 .cse2)))) .cse2 downsweep_~tmp~0))))) is different from true [2021-11-20 05:34:58,397 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_downsweep_~left_58 Int)) (let ((.cse10 (= (mod (+ |c_downsweep_#in~right| |c_downsweep_#in~left|) 2) 0))) (let ((.cse9 (or .cse10 (<= |c_downsweep_#in~left| |c_downsweep_#in~right|)))) (and (or (and (exists ((downsweep_~tmp~0 Int)) (= |c_#memory_int| (store |c_old(#memory_int)| |c_downsweep_#in~a.base| (let ((.cse8 (* |c_downsweep_#in~right| 4))) (let ((.cse2 (+ (* (div (+ (* |c_downsweep_#in~left| (- 1)) |c_downsweep_#in~right|) 2) (- 4)) .cse8 |c_downsweep_#in~a.offset|))) (store (let ((.cse1 (+ .cse8 |c_downsweep_#in~a.offset|))) (let ((.cse0 (let ((.cse7 (select |c_old(#memory_int)| |c_downsweep_#in~a.base|))) (let ((.cse6 (+ |c_downsweep_#in~a.offset| (* v_downsweep_~left_58 4))) (.cse5 (select .cse7 .cse1))) (store (let ((.cse4 (+ |c_downsweep_#in~a.offset| (* |c_downsweep_#in~left| 4)))) (let ((.cse3 (store .cse7 .cse1 (+ .cse5 (select .cse7 .cse4))))) (store .cse3 .cse4 (+ .cse5 (select (store .cse3 .cse4 .cse5) .cse6))))) .cse6 .cse5))))) (store .cse0 .cse1 (+ (select .cse0 .cse2) (select .cse0 .cse1))))) .cse2 downsweep_~tmp~0)))))) .cse9) (and (not .cse10) (exists ((downsweep_~tmp~0 Int)) (= |c_#memory_int| (store |c_old(#memory_int)| |c_downsweep_#in~a.base| (let ((.cse19 (* |c_downsweep_#in~right| 4))) (let ((.cse13 (+ (* (div (+ (* |c_downsweep_#in~left| (- 1)) |c_downsweep_#in~right|) 2) (- 4)) (- 4) .cse19 |c_downsweep_#in~a.offset|))) (store (let ((.cse12 (+ .cse19 |c_downsweep_#in~a.offset|))) (let ((.cse11 (let ((.cse18 (select |c_old(#memory_int)| |c_downsweep_#in~a.base|))) (let ((.cse17 (+ |c_downsweep_#in~a.offset| (* v_downsweep_~left_58 4))) (.cse16 (select .cse18 .cse12))) (store (let ((.cse15 (+ |c_downsweep_#in~a.offset| (* |c_downsweep_#in~left| 4)))) (let ((.cse14 (store .cse18 .cse12 (+ .cse16 (select .cse18 .cse15))))) (store .cse14 .cse15 (+ .cse16 (select (store .cse14 .cse15 .cse16) .cse17))))) .cse17 .cse16))))) (store .cse11 .cse12 (+ (select .cse11 .cse13) (select .cse11 .cse12))))) .cse13 downsweep_~tmp~0)))))) (< |c_downsweep_#in~right| |c_downsweep_#in~left|))) (<= |c_downsweep_#in~left| (+ 1 v_downsweep_~left_58)) (let ((.cse20 (div (+ (* |c_downsweep_#in~left| (- 1)) |c_downsweep_#in~right|) 2))) (or (and (<= (+ .cse20 v_downsweep_~left_58) |c_downsweep_#in~left|) .cse9) (<= (+ .cse20 1 v_downsweep_~left_58) |c_downsweep_#in~left|))))))) is different from true [2021-11-20 05:34:58,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 944 treesize of output 844 [2021-11-20 05:34:58,689 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Should have been eliminated by DER [2021-11-20 05:34:58,689 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 05:34:58,689 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-11-20 05:34:58,689 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593877580] [2021-11-20 05:34:58,689 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 05:34:58,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-20 05:34:58,690 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:34:58,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-20 05:34:58,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=968, Unknown=12, NotChecked=260, Total=1332 [2021-11-20 05:34:58,691 INFO L87 Difference]: Start difference. First operand 93 states and 123 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-20 05:34:58,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 05:34:58,692 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 60 SyntacticMatches, 5 SemanticMatches, 35 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 31.4s TimeCoverageRelationStatistics Valid=92, Invalid=968, Unknown=12, NotChecked=260, Total=1332 [2021-11-20 05:34:58,693 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:34:58,694 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 3 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 05:34:58,731 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dcdd98b-7e1b-4e88-97f2-e7a15f74ab5b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-20 05:34:58,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dcdd98b-7e1b-4e88-97f2-e7a15f74ab5b/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-20 05:34:58,920 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@7eafca3b at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.assertCodeBlock(IncrementalHoareTripleChecker.java:359) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.prepareAssertionStackAndAddTransition(IncrementalHoareTripleChecker.java:206) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.checkInternal(IncrementalHoareTripleChecker.java:131) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker$ProtectedHtc.checkInternal(ChainingHoareTripleChecker.java:436) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker.checkInternal(ChainingHoareTripleChecker.java:98) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.checkInternal(CachingHoareTripleChecker.java:95) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton$InternalSuccessorComputationHelper.computeSuccWithSolver(AbstractInterpolantAutomaton.java:357) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.addOtherSuccessors(DeterministicInterpolantAutomaton.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:78) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:213) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:216) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:208) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1058) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:960) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:182) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:868) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:784) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:462) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:420) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-20 05:34:58,923 INFO L158 Benchmark]: Toolchain (without parser) took 190355.77ms. Allocated memory was 146.8MB in the beginning and 176.2MB in the end (delta: 29.4MB). Free memory was 116.4MB in the beginning and 102.0MB in the end (delta: 14.4MB). Peak memory consumption was 44.3MB. Max. memory is 16.1GB. [2021-11-20 05:34:58,923 INFO L158 Benchmark]: CDTParser took 0.25ms. Allocated memory is still 86.0MB. Free memory was 39.7MB in the beginning and 39.7MB in the end (delta: 44.6kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-20 05:34:58,923 INFO L158 Benchmark]: CACSL2BoogieTranslator took 288.62ms. Allocated memory is still 146.8MB. Free memory was 116.4MB in the beginning and 121.2MB in the end (delta: -4.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-20 05:34:58,924 INFO L158 Benchmark]: Boogie Procedure Inliner took 39.66ms. Allocated memory is still 146.8MB. Free memory was 121.2MB in the beginning and 119.6MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-20 05:34:58,924 INFO L158 Benchmark]: Boogie Preprocessor took 43.36ms. Allocated memory is still 146.8MB. Free memory was 119.6MB in the beginning and 118.0MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-20 05:34:58,924 INFO L158 Benchmark]: RCFGBuilder took 2577.83ms. Allocated memory is still 146.8MB. Free memory was 118.0MB in the beginning and 103.9MB in the end (delta: 14.2MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-11-20 05:34:58,925 INFO L158 Benchmark]: TraceAbstraction took 187396.35ms. Allocated memory was 146.8MB in the beginning and 176.2MB in the end (delta: 29.4MB). Free memory was 103.3MB in the beginning and 102.0MB in the end (delta: 1.4MB). Peak memory consumption was 32.5MB. Max. memory is 16.1GB. [2021-11-20 05:34:58,926 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25ms. Allocated memory is still 86.0MB. Free memory was 39.7MB in the beginning and 39.7MB in the end (delta: 44.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 288.62ms. Allocated memory is still 146.8MB. Free memory was 116.4MB in the beginning and 121.2MB in the end (delta: -4.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 39.66ms. Allocated memory is still 146.8MB. Free memory was 121.2MB in the beginning and 119.6MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 43.36ms. Allocated memory is still 146.8MB. Free memory was 119.6MB in the beginning and 118.0MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 2577.83ms. Allocated memory is still 146.8MB. Free memory was 118.0MB in the beginning and 103.9MB in the end (delta: 14.2MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 187396.35ms. Allocated memory was 146.8MB in the beginning and 176.2MB in the end (delta: 29.4MB). Free memory was 103.3MB in the beginning and 102.0MB in the end (delta: 1.4MB). Peak memory consumption was 32.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@7eafca3b de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@7eafca3b: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-11-20 05:34:59,066 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dcdd98b-7e1b-4e88-97f2-e7a15f74ab5b/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dcdd98b-7e1b-4e88-97f2-e7a15f74ab5b/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dcdd98b-7e1b-4e88-97f2-e7a15f74ab5b/bin/uautomizer-DQz5hQGWxF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dcdd98b-7e1b-4e88-97f2-e7a15f74ab5b/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dcdd98b-7e1b-4e88-97f2-e7a15f74ab5b/bin/uautomizer-DQz5hQGWxF/config/AutomizerReach.xml -i ../../sv-benchmarks/c/verifythis/prefixsum_rec.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dcdd98b-7e1b-4e88-97f2-e7a15f74ab5b/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dcdd98b-7e1b-4e88-97f2-e7a15f74ab5b/bin/uautomizer-DQz5hQGWxF --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 81bdf17d0130e934dcb31a2f76f595e947b99d6273334b7f05365a624466aeab --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 05:35:01,274 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 05:35:01,278 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 05:35:01,317 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 05:35:01,317 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 05:35:01,319 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 05:35:01,321 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 05:35:01,323 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 05:35:01,325 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 05:35:01,327 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 05:35:01,328 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 05:35:01,329 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 05:35:01,330 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 05:35:01,331 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 05:35:01,333 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 05:35:01,334 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 05:35:01,335 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 05:35:01,336 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 05:35:01,339 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 05:35:01,341 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 05:35:01,343 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 05:35:01,347 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 05:35:01,349 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 05:35:01,350 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 05:35:01,354 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 05:35:01,354 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 05:35:01,354 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 05:35:01,356 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 05:35:01,356 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 05:35:01,357 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 05:35:01,358 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 05:35:01,359 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 05:35:01,360 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 05:35:01,361 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 05:35:01,368 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 05:35:01,368 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 05:35:01,369 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 05:35:01,369 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 05:35:01,370 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 05:35:01,371 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 05:35:01,372 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 05:35:01,373 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dcdd98b-7e1b-4e88-97f2-e7a15f74ab5b/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-11-20 05:35:01,399 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 05:35:01,400 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 05:35:01,400 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 05:35:01,400 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 05:35:01,401 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 05:35:01,401 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 05:35:01,402 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 05:35:01,402 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 05:35:01,402 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 05:35:01,403 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 05:35:01,403 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 05:35:01,403 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 05:35:01,403 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 05:35:01,403 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 05:35:01,404 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 05:35:01,404 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 05:35:01,404 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-20 05:35:01,404 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-20 05:35:01,405 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-20 05:35:01,405 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 05:35:01,405 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 05:35:01,405 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 05:35:01,405 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 05:35:01,406 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 05:35:01,406 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 05:35:01,406 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 05:35:01,406 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 05:35:01,407 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 05:35:01,407 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 05:35:01,407 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 05:35:01,407 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-11-20 05:35:01,408 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-20 05:35:01,408 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-20 05:35:01,408 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-20 05:35:01,408 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 05:35:01,408 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 05:35:01,409 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-20 05:35:01,409 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_6dcdd98b-7e1b-4e88-97f2-e7a15f74ab5b/bin/uautomizer-DQz5hQGWxF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dcdd98b-7e1b-4e88-97f2-e7a15f74ab5b/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 81bdf17d0130e934dcb31a2f76f595e947b99d6273334b7f05365a624466aeab [2021-11-20 05:35:01,739 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 05:35:01,766 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 05:35:01,768 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 05:35:01,769 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 05:35:01,770 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 05:35:01,771 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dcdd98b-7e1b-4e88-97f2-e7a15f74ab5b/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/verifythis/prefixsum_rec.c [2021-11-20 05:35:01,843 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dcdd98b-7e1b-4e88-97f2-e7a15f74ab5b/bin/uautomizer-DQz5hQGWxF/data/242299b7e/e070f9bf08dc4bfeb9b3e863d577fa8f/FLAG29846af52 [2021-11-20 05:35:02,468 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 05:35:02,469 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dcdd98b-7e1b-4e88-97f2-e7a15f74ab5b/sv-benchmarks/c/verifythis/prefixsum_rec.c [2021-11-20 05:35:02,477 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dcdd98b-7e1b-4e88-97f2-e7a15f74ab5b/bin/uautomizer-DQz5hQGWxF/data/242299b7e/e070f9bf08dc4bfeb9b3e863d577fa8f/FLAG29846af52 [2021-11-20 05:35:02,805 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dcdd98b-7e1b-4e88-97f2-e7a15f74ab5b/bin/uautomizer-DQz5hQGWxF/data/242299b7e/e070f9bf08dc4bfeb9b3e863d577fa8f [2021-11-20 05:35:02,809 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 05:35:02,811 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 05:35:02,814 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 05:35:02,814 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 05:35:02,817 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 05:35:02,818 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 05:35:02" (1/1) ... [2021-11-20 05:35:02,820 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f6ebee2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:35:02, skipping insertion in model container [2021-11-20 05:35:02,820 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 05:35:02" (1/1) ... [2021-11-20 05:35:02,827 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 05:35:02,850 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 05:35:02,980 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dcdd98b-7e1b-4e88-97f2-e7a15f74ab5b/sv-benchmarks/c/verifythis/prefixsum_rec.c[525,538] [2021-11-20 05:35:03,009 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 05:35:03,021 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 05:35:03,034 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dcdd98b-7e1b-4e88-97f2-e7a15f74ab5b/sv-benchmarks/c/verifythis/prefixsum_rec.c[525,538] [2021-11-20 05:35:03,049 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 05:35:03,064 INFO L208 MainTranslator]: Completed translation [2021-11-20 05:35:03,065 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:35:03 WrapperNode [2021-11-20 05:35:03,065 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 05:35:03,066 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 05:35:03,066 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 05:35:03,066 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 05:35:03,073 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:35:03" (1/1) ... [2021-11-20 05:35:03,084 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:35:03" (1/1) ... [2021-11-20 05:35:03,105 INFO L137 Inliner]: procedures = 24, calls = 37, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 73 [2021-11-20 05:35:03,107 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 05:35:03,108 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 05:35:03,108 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 05:35:03,108 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 05:35:03,116 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:35:03" (1/1) ... [2021-11-20 05:35:03,116 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:35:03" (1/1) ... [2021-11-20 05:35:03,120 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:35:03" (1/1) ... [2021-11-20 05:35:03,121 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:35:03" (1/1) ... [2021-11-20 05:35:03,131 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:35:03" (1/1) ... [2021-11-20 05:35:03,135 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:35:03" (1/1) ... [2021-11-20 05:35:03,164 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:35:03" (1/1) ... [2021-11-20 05:35:03,167 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 05:35:03,172 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 05:35:03,172 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 05:35:03,172 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 05:35:03,173 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:35:03" (1/1) ... [2021-11-20 05:35:03,188 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 05:35:03,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dcdd98b-7e1b-4e88-97f2-e7a15f74ab5b/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:35:03,217 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dcdd98b-7e1b-4e88-97f2-e7a15f74ab5b/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 05:35:03,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dcdd98b-7e1b-4e88-97f2-e7a15f74ab5b/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 05:35:03,274 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 05:35:03,274 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-20 05:35:03,275 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-20 05:35:03,275 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-20 05:35:03,275 INFO L130 BoogieDeclarations]: Found specification of procedure downsweep [2021-11-20 05:35:03,280 INFO L138 BoogieDeclarations]: Found implementation of procedure downsweep [2021-11-20 05:35:03,280 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-20 05:35:03,280 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-20 05:35:03,280 INFO L130 BoogieDeclarations]: Found specification of procedure upsweep [2021-11-20 05:35:03,281 INFO L138 BoogieDeclarations]: Found implementation of procedure upsweep [2021-11-20 05:35:03,281 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 05:35:03,281 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 05:35:03,281 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-11-20 05:35:03,281 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-11-20 05:35:03,282 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 05:35:03,282 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-20 05:35:03,435 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 05:35:03,437 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 05:35:03,785 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 05:35:03,806 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 05:35:03,809 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-20 05:35:03,811 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 05:35:03 BoogieIcfgContainer [2021-11-20 05:35:03,812 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 05:35:03,814 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 05:35:03,814 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 05:35:03,817 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 05:35:03,817 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 05:35:02" (1/3) ... [2021-11-20 05:35:03,818 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25ec2ca3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 05:35:03, skipping insertion in model container [2021-11-20 05:35:03,819 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:35:03" (2/3) ... [2021-11-20 05:35:03,819 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25ec2ca3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 05:35:03, skipping insertion in model container [2021-11-20 05:35:03,820 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 05:35:03" (3/3) ... [2021-11-20 05:35:03,822 INFO L111 eAbstractionObserver]: Analyzing ICFG prefixsum_rec.c [2021-11-20 05:35:03,828 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 05:35:03,828 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 05:35:03,900 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 05:35:03,916 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-20 05:35:03,916 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 05:35:03,933 INFO L276 IsEmpty]: Start isEmpty. Operand has 49 states, 33 states have (on average 1.3333333333333333) internal successors, (44), 36 states have internal predecessors, (44), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-20 05:35:03,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-20 05:35:03,942 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:35:03,943 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:35:03,943 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:35:03,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:35:03,955 INFO L85 PathProgramCache]: Analyzing trace with hash 1639330660, now seen corresponding path program 1 times [2021-11-20 05:35:03,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:35:03,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1608028711] [2021-11-20 05:35:03,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:35:03,971 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:35:03,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dcdd98b-7e1b-4e88-97f2-e7a15f74ab5b/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:35:03,974 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dcdd98b-7e1b-4e88-97f2-e7a15f74ab5b/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:35:04,022 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dcdd98b-7e1b-4e88-97f2-e7a15f74ab5b/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-20 05:35:04,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:04,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-20 05:35:04,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:35:04,341 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-20 05:35:04,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:35:04,490 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-20 05:35:04,491 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 05:35:04,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1608028711] [2021-11-20 05:35:04,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1608028711] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 05:35:04,492 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:35:04,493 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-20 05:35:04,494 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362579875] [2021-11-20 05:35:04,495 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 05:35:04,499 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-20 05:35:04,499 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 05:35:04,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-20 05:35:04,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 05:35:04,528 INFO L87 Difference]: Start difference. First operand has 49 states, 33 states have (on average 1.3333333333333333) internal successors, (44), 36 states have internal predecessors, (44), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 2 states, 2 states have (on average 19.0) internal successors, (38), 2 states have internal predecessors, (38), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-20 05:35:04,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:35:04,552 INFO L93 Difference]: Finished difference Result 95 states and 126 transitions. [2021-11-20 05:35:04,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 05:35:04,554 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 19.0) internal successors, (38), 2 states have internal predecessors, (38), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 44 [2021-11-20 05:35:04,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:35:04,561 INFO L225 Difference]: With dead ends: 95 [2021-11-20 05:35:04,561 INFO L226 Difference]: Without dead ends: 45 [2021-11-20 05:35:04,565 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 05:35:04,568 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:35:04,570 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 05:35:04,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-11-20 05:35:04,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-11-20 05:35:04,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 32 states have internal predecessors, (35), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-20 05:35:04,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 55 transitions. [2021-11-20 05:35:04,617 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 55 transitions. Word has length 44 [2021-11-20 05:35:04,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:35:04,618 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 55 transitions. [2021-11-20 05:35:04,618 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 19.0) internal successors, (38), 2 states have internal predecessors, (38), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-20 05:35:04,618 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 55 transitions. [2021-11-20 05:35:04,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-20 05:35:04,621 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:35:04,622 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:35:04,643 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dcdd98b-7e1b-4e88-97f2-e7a15f74ab5b/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-20 05:35:04,840 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dcdd98b-7e1b-4e88-97f2-e7a15f74ab5b/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 05:35:04,841 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:35:04,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:35:04,842 INFO L85 PathProgramCache]: Analyzing trace with hash 1439199646, now seen corresponding path program 1 times [2021-11-20 05:35:04,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:35:04,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1468571873] [2021-11-20 05:35:04,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:35:04,843 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:35:04,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dcdd98b-7e1b-4e88-97f2-e7a15f74ab5b/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:35:04,846 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dcdd98b-7e1b-4e88-97f2-e7a15f74ab5b/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:35:04,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dcdd98b-7e1b-4e88-97f2-e7a15f74ab5b/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-20 05:35:04,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:04,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-20 05:35:04,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:35:05,196 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-20 05:35:05,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:35:05,420 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-20 05:35:05,420 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 05:35:05,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1468571873] [2021-11-20 05:35:05,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1468571873] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 05:35:05,421 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:35:05,421 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 11 [2021-11-20 05:35:05,422 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291648847] [2021-11-20 05:35:05,422 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 05:35:05,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-20 05:35:05,424 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 05:35:05,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-20 05:35:05,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-11-20 05:35:05,425 INFO L87 Difference]: Start difference. First operand 45 states and 55 transitions. Second operand has 11 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-20 05:35:05,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:35:05,677 INFO L93 Difference]: Finished difference Result 82 states and 102 transitions. [2021-11-20 05:35:05,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 05:35:05,678 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 44 [2021-11-20 05:35:05,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:35:05,679 INFO L225 Difference]: With dead ends: 82 [2021-11-20 05:35:05,679 INFO L226 Difference]: Without dead ends: 46 [2021-11-20 05:35:05,681 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-11-20 05:35:05,682 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 51 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 05:35:05,683 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 308 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 05:35:05,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-11-20 05:35:05,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-11-20 05:35:05,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 33 states have internal predecessors, (36), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-20 05:35:05,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 56 transitions. [2021-11-20 05:35:05,693 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 56 transitions. Word has length 44 [2021-11-20 05:35:05,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:35:05,694 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 56 transitions. [2021-11-20 05:35:05,694 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-20 05:35:05,695 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 56 transitions. [2021-11-20 05:35:05,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-20 05:35:05,697 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:35:05,697 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:35:05,715 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dcdd98b-7e1b-4e88-97f2-e7a15f74ab5b/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-20 05:35:05,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dcdd98b-7e1b-4e88-97f2-e7a15f74ab5b/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 05:35:05,915 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:35:05,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:35:05,916 INFO L85 PathProgramCache]: Analyzing trace with hash 1970227632, now seen corresponding path program 1 times [2021-11-20 05:35:05,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:35:05,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1283694099] [2021-11-20 05:35:05,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:35:05,917 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:35:05,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dcdd98b-7e1b-4e88-97f2-e7a15f74ab5b/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:35:05,918 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dcdd98b-7e1b-4e88-97f2-e7a15f74ab5b/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:35:05,921 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dcdd98b-7e1b-4e88-97f2-e7a15f74ab5b/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-20 05:35:06,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:06,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-20 05:35:06,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:35:06,455 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-20 05:35:06,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:35:06,776 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 05:35:06,777 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 05:35:06,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1283694099] [2021-11-20 05:35:06,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1283694099] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:35:06,777 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:35:06,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-11-20 05:35:06,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179267701] [2021-11-20 05:35:06,778 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 05:35:06,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-20 05:35:06,779 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 05:35:06,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-20 05:35:06,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-11-20 05:35:06,780 INFO L87 Difference]: Start difference. First operand 46 states and 56 transitions. Second operand has 18 states, 16 states have (on average 3.0625) internal successors, (49), 17 states have internal predecessors, (49), 6 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (12), 5 states have call predecessors, (12), 6 states have call successors, (12) [2021-11-20 05:35:07,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:35:07,496 INFO L93 Difference]: Finished difference Result 94 states and 120 transitions. [2021-11-20 05:35:07,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-20 05:35:07,497 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 3.0625) internal successors, (49), 17 states have internal predecessors, (49), 6 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (12), 5 states have call predecessors, (12), 6 states have call successors, (12) Word has length 45 [2021-11-20 05:35:07,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:35:07,499 INFO L225 Difference]: With dead ends: 94 [2021-11-20 05:35:07,499 INFO L226 Difference]: Without dead ends: 71 [2021-11-20 05:35:07,500 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=178, Invalid=472, Unknown=0, NotChecked=0, Total=650 [2021-11-20 05:35:07,502 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 133 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 05:35:07,502 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 380 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-20 05:35:07,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-11-20 05:35:07,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 58. [2021-11-20 05:35:07,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 40 states have (on average 1.15) internal successors, (46), 42 states have internal predecessors, (46), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-11-20 05:35:07,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 72 transitions. [2021-11-20 05:35:07,515 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 72 transitions. Word has length 45 [2021-11-20 05:35:07,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:35:07,516 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 72 transitions. [2021-11-20 05:35:07,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 3.0625) internal successors, (49), 17 states have internal predecessors, (49), 6 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (12), 5 states have call predecessors, (12), 6 states have call successors, (12) [2021-11-20 05:35:07,517 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 72 transitions. [2021-11-20 05:35:07,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-20 05:35:07,518 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:35:07,518 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:35:07,532 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dcdd98b-7e1b-4e88-97f2-e7a15f74ab5b/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-11-20 05:35:07,732 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dcdd98b-7e1b-4e88-97f2-e7a15f74ab5b/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 05:35:07,732 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:35:07,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:35:07,733 INFO L85 PathProgramCache]: Analyzing trace with hash -305058916, now seen corresponding path program 1 times [2021-11-20 05:35:07,733 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:35:07,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1789361419] [2021-11-20 05:35:07,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:35:07,734 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:35:07,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dcdd98b-7e1b-4e88-97f2-e7a15f74ab5b/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:35:07,735 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dcdd98b-7e1b-4e88-97f2-e7a15f74ab5b/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:35:07,741 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dcdd98b-7e1b-4e88-97f2-e7a15f74ab5b/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-20 05:35:07,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:07,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-20 05:35:07,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:35:08,323 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-20 05:35:08,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:35:08,739 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 05:35:08,739 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 05:35:08,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1789361419] [2021-11-20 05:35:08,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1789361419] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:35:08,739 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:35:08,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-11-20 05:35:08,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508332606] [2021-11-20 05:35:08,740 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 05:35:08,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-20 05:35:08,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 05:35:08,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-20 05:35:08,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=346, Unknown=0, NotChecked=0, Total=462 [2021-11-20 05:35:08,742 INFO L87 Difference]: Start difference. First operand 58 states and 72 transitions. Second operand has 22 states, 20 states have (on average 2.75) internal successors, (55), 21 states have internal predecessors, (55), 6 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (12), 5 states have call predecessors, (12), 6 states have call successors, (12) [2021-11-20 05:35:09,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:35:09,948 INFO L93 Difference]: Finished difference Result 124 states and 158 transitions. [2021-11-20 05:35:09,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-20 05:35:09,949 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 2.75) internal successors, (55), 21 states have internal predecessors, (55), 6 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (12), 5 states have call predecessors, (12), 6 states have call successors, (12) Word has length 48 [2021-11-20 05:35:09,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:35:09,951 INFO L225 Difference]: With dead ends: 124 [2021-11-20 05:35:09,951 INFO L226 Difference]: Without dead ends: 101 [2021-11-20 05:35:09,952 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=304, Invalid=886, Unknown=0, NotChecked=0, Total=1190 [2021-11-20 05:35:09,954 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 171 mSDsluCounter, 434 mSDsCounter, 0 mSdLazyCounter, 379 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 495 SdHoareTripleChecker+Invalid, 466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-20 05:35:09,954 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 495 Invalid, 466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 379 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-20 05:35:09,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-11-20 05:35:09,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 63. [2021-11-20 05:35:09,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 45 states have (on average 1.1555555555555554) internal successors, (52), 47 states have internal predecessors, (52), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-11-20 05:35:09,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 78 transitions. [2021-11-20 05:35:09,969 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 78 transitions. Word has length 48 [2021-11-20 05:35:09,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:35:09,970 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 78 transitions. [2021-11-20 05:35:09,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 2.75) internal successors, (55), 21 states have internal predecessors, (55), 6 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (12), 5 states have call predecessors, (12), 6 states have call successors, (12) [2021-11-20 05:35:09,970 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 78 transitions. [2021-11-20 05:35:09,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-20 05:35:09,972 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:35:09,972 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:35:09,988 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dcdd98b-7e1b-4e88-97f2-e7a15f74ab5b/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-20 05:35:10,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dcdd98b-7e1b-4e88-97f2-e7a15f74ab5b/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 05:35:10,184 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:35:10,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:35:10,184 INFO L85 PathProgramCache]: Analyzing trace with hash 249071788, now seen corresponding path program 2 times [2021-11-20 05:35:10,185 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:35:10,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [469684109] [2021-11-20 05:35:10,185 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 05:35:10,185 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:35:10,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dcdd98b-7e1b-4e88-97f2-e7a15f74ab5b/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:35:10,194 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dcdd98b-7e1b-4e88-97f2-e7a15f74ab5b/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:35:10,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dcdd98b-7e1b-4e88-97f2-e7a15f74ab5b/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-20 05:35:10,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 05:35:10,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:35:10,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 45 conjunts are in the unsatisfiable core [2021-11-20 05:35:10,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:35:11,172 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 16 treesize of output 12 [2021-11-20 05:35:11,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:35:11,515 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 05:35:11,515 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 70 treesize of output 32 [2021-11-20 05:35:12,964 INFO L354 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2021-11-20 05:35:12,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 36 [2021-11-20 05:35:13,061 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 05:35:13,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:35:17,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 40 [2021-11-20 05:35:17,458 INFO L354 Elim1Store]: treesize reduction 14, result has 6.7 percent of original size [2021-11-20 05:35:17,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 116 treesize of output 105 [2021-11-20 05:35:28,281 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 05:35:28,282 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 05:35:28,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [469684109] [2021-11-20 05:35:28,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [469684109] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:35:28,282 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:35:28,282 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 34 [2021-11-20 05:35:28,282 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382508583] [2021-11-20 05:35:28,283 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 05:35:28,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-20 05:35:28,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 05:35:28,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-20 05:35:28,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=984, Unknown=0, NotChecked=0, Total=1122 [2021-11-20 05:35:28,285 INFO L87 Difference]: Start difference. First operand 63 states and 78 transitions. Second operand has 34 states, 30 states have (on average 1.9) internal successors, (57), 28 states have internal predecessors, (57), 8 states have call successors, (11), 3 states have call predecessors, (11), 6 states have return successors, (11), 8 states have call predecessors, (11), 8 states have call successors, (11) [2021-11-20 05:35:51,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:35:51,173 INFO L93 Difference]: Finished difference Result 151 states and 188 transitions. [2021-11-20 05:35:51,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-20 05:35:51,177 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 30 states have (on average 1.9) internal successors, (57), 28 states have internal predecessors, (57), 8 states have call successors, (11), 3 states have call predecessors, (11), 6 states have return successors, (11), 8 states have call predecessors, (11), 8 states have call successors, (11) Word has length 49 [2021-11-20 05:35:51,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:35:51,180 INFO L225 Difference]: With dead ends: 151 [2021-11-20 05:35:51,180 INFO L226 Difference]: Without dead ends: 129 [2021-11-20 05:35:51,183 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 561 ImplicationChecksByTransitivity, 25.4s TimeCoverageRelationStatistics Valid=514, Invalid=3146, Unknown=0, NotChecked=0, Total=3660 [2021-11-20 05:35:51,184 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 296 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 852 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 397 SdHoareTripleChecker+Invalid, 978 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 852 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:35:51,184 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [302 Valid, 397 Invalid, 978 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 852 Invalid, 0 Unknown, 0 Unchecked, 10.1s Time] [2021-11-20 05:35:51,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-11-20 05:35:51,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 89. [2021-11-20 05:35:51,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 64 states have (on average 1.125) internal successors, (72), 65 states have internal predecessors, (72), 18 states have call successors, (18), 5 states have call predecessors, (18), 6 states have return successors, (25), 18 states have call predecessors, (25), 18 states have call successors, (25) [2021-11-20 05:35:51,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 115 transitions. [2021-11-20 05:35:51,205 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 115 transitions. Word has length 49 [2021-11-20 05:35:51,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:35:51,205 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 115 transitions. [2021-11-20 05:35:51,206 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 30 states have (on average 1.9) internal successors, (57), 28 states have internal predecessors, (57), 8 states have call successors, (11), 3 states have call predecessors, (11), 6 states have return successors, (11), 8 states have call predecessors, (11), 8 states have call successors, (11) [2021-11-20 05:35:51,206 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 115 transitions. [2021-11-20 05:35:51,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-20 05:35:51,208 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:35:51,208 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:35:51,232 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dcdd98b-7e1b-4e88-97f2-e7a15f74ab5b/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-11-20 05:35:51,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dcdd98b-7e1b-4e88-97f2-e7a15f74ab5b/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 05:35:51,422 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:35:51,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:35:51,423 INFO L85 PathProgramCache]: Analyzing trace with hash 1879560803, now seen corresponding path program 1 times [2021-11-20 05:35:51,423 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:35:51,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [822153575] [2021-11-20 05:35:51,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:35:51,424 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:35:51,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dcdd98b-7e1b-4e88-97f2-e7a15f74ab5b/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:35:51,425 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dcdd98b-7e1b-4e88-97f2-e7a15f74ab5b/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:35:51,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dcdd98b-7e1b-4e88-97f2-e7a15f74ab5b/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-20 05:35:51,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:51,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 66 conjunts are in the unsatisfiable core [2021-11-20 05:35:51,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:35:51,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 05:35:52,044 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 05:35:52,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 14 [2021-11-20 05:35:52,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2021-11-20 05:35:52,353 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 0 case distinctions, treesize of input 30 treesize of output 28 [2021-11-20 05:35:52,690 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 0 case distinctions, treesize of input 33 treesize of output 29 [2021-11-20 05:35:53,144 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 0 case distinctions, treesize of input 63 treesize of output 55 [2021-11-20 05:35:53,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:35:53,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:35:53,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 05:35:53,178 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 05:35:53,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 43 [2021-11-20 05:35:54,209 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 0 case distinctions, treesize of input 66 treesize of output 60 [2021-11-20 05:35:54,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:35:54,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 57 treesize of output 45 [2021-11-20 05:36:00,896 WARN L860 $PredicateComparison]: unable to prove that (exists ((downsweep_~tmp~0 (_ BitVec 32))) (= |c_#memory_int| (store |c_old(#memory_int)| |c_downsweep_#in~a.base| (let ((.cse2 (bvadd (bvmul |c_downsweep_#in~left| (_ bv4 32)) |c_downsweep_#in~a.offset|))) (store (let ((.cse0 (select |c_old(#memory_int)| |c_downsweep_#in~a.base|)) (.cse1 (bvadd (bvmul |c_downsweep_#in~right| (_ bv4 32)) |c_downsweep_#in~a.offset|))) (store .cse0 .cse1 (bvadd (select .cse0 .cse2) (select .cse0 .cse1)))) .cse2 downsweep_~tmp~0))))) is different from true [2021-11-20 05:36:00,963 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 0 case distinctions, treesize of input 111 treesize of output 101 [2021-11-20 05:36:01,023 INFO L354 Elim1Store]: treesize reduction 66, result has 17.5 percent of original size [2021-11-20 05:36:01,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 3 case distinctions, treesize of input 98 treesize of output 60 [2021-11-20 05:36:16,422 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 05:36:16,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 65 [2021-11-20 05:36:16,439 INFO L354 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2021-11-20 05:36:16,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 81 treesize of output 56 [2021-11-20 05:36:16,586 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 05:36:16,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:37:03,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1668 treesize of output 1556 [2021-11-20 05:37:05,639 INFO L354 Elim1Store]: treesize reduction 17, result has 77.6 percent of original size [2021-11-20 05:37:05,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 4766 treesize of output 4268