./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/bitvector/num_conversion_2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6a47aea7 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/bitvector/num_conversion_2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 7e0da033eb6b5a3b4db0394198751cf880534ee28b64f0bd7b196bfba1d785e1 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 17:34:00,543 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 17:34:00,546 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 17:34:00,575 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 17:34:00,576 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 17:34:00,577 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 17:34:00,579 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 17:34:00,581 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 17:34:00,583 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 17:34:00,585 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 17:34:00,586 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 17:34:00,587 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 17:34:00,588 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 17:34:00,589 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 17:34:00,591 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 17:34:00,592 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 17:34:00,593 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 17:34:00,594 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 17:34:00,596 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 17:34:00,599 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 17:34:00,601 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 17:34:00,602 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 17:34:00,604 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 17:34:00,605 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 17:34:00,608 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 17:34:00,609 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 17:34:00,609 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 17:34:00,610 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 17:34:00,611 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 17:34:00,612 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 17:34:00,613 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 17:34:00,614 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 17:34:00,615 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 17:34:00,616 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 17:34:00,617 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 17:34:00,617 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 17:34:00,618 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 17:34:00,619 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 17:34:00,619 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 17:34:00,620 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 17:34:00,621 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 17:34:00,622 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 17:34:00,647 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 17:34:00,648 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 17:34:00,648 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 17:34:00,648 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 17:34:00,649 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 17:34:00,649 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 17:34:00,649 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 17:34:00,650 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 17:34:00,650 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 17:34:00,650 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 17:34:00,650 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 17:34:00,651 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 17:34:00,651 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 17:34:00,651 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 17:34:00,651 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 17:34:00,652 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 17:34:00,652 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 17:34:00,652 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 17:34:00,653 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 17:34:00,653 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 17:34:00,653 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 17:34:00,653 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 17:34:00,654 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 17:34:00,654 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 17:34:00,654 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 17:34:00,654 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 17:34:00,655 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 17:34:00,655 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 17:34:00,655 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 17:34:00,655 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 17:34:00,655 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 17:34:00,656 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 17:34:00,656 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:34:00,656 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 17:34:00,656 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 17:34:00,657 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 17:34:00,657 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 17:34:00,657 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 17:34:00,657 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 17:34:00,658 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 17:34:00,658 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 17:34:00,658 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7e0da033eb6b5a3b4db0394198751cf880534ee28b64f0bd7b196bfba1d785e1 [2021-11-23 17:34:00,894 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 17:34:00,914 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 17:34:00,917 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 17:34:00,918 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 17:34:00,919 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 17:34:00,920 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/bitvector/num_conversion_2.c [2021-11-23 17:34:00,990 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/data/f59f87fe6/10f96d3f599e41c398a52a799146ebf0/FLAGe99e361a0 [2021-11-23 17:34:01,493 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 17:34:01,494 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/sv-benchmarks/c/bitvector/num_conversion_2.c [2021-11-23 17:34:01,505 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/data/f59f87fe6/10f96d3f599e41c398a52a799146ebf0/FLAGe99e361a0 [2021-11-23 17:34:01,867 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/data/f59f87fe6/10f96d3f599e41c398a52a799146ebf0 [2021-11-23 17:34:01,870 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 17:34:01,871 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 17:34:01,873 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 17:34:01,873 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 17:34:01,876 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 17:34:01,877 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:34:01" (1/1) ... [2021-11-23 17:34:01,878 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3734883e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:34:01, skipping insertion in model container [2021-11-23 17:34:01,879 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:34:01" (1/1) ... [2021-11-23 17:34:01,886 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 17:34:01,899 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 17:34:02,077 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_640c6691-a532-4708-af31-0f8cdaa76b23/sv-benchmarks/c/bitvector/num_conversion_2.c[685,698] [2021-11-23 17:34:02,100 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:34:02,108 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 17:34:02,120 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_640c6691-a532-4708-af31-0f8cdaa76b23/sv-benchmarks/c/bitvector/num_conversion_2.c[685,698] [2021-11-23 17:34:02,124 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:34:02,137 INFO L208 MainTranslator]: Completed translation [2021-11-23 17:34:02,138 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:34:02 WrapperNode [2021-11-23 17:34:02,138 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 17:34:02,139 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 17:34:02,139 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 17:34:02,139 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 17:34:02,147 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:34:02" (1/1) ... [2021-11-23 17:34:02,153 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:34:02" (1/1) ... [2021-11-23 17:34:02,173 INFO L137 Inliner]: procedures = 13, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 34 [2021-11-23 17:34:02,174 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 17:34:02,175 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 17:34:02,175 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 17:34:02,175 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 17:34:02,184 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:34:02" (1/1) ... [2021-11-23 17:34:02,184 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:34:02" (1/1) ... [2021-11-23 17:34:02,187 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:34:02" (1/1) ... [2021-11-23 17:34:02,187 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:34:02" (1/1) ... [2021-11-23 17:34:02,200 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:34:02" (1/1) ... [2021-11-23 17:34:02,205 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:34:02" (1/1) ... [2021-11-23 17:34:02,209 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:34:02" (1/1) ... [2021-11-23 17:34:02,216 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 17:34:02,217 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 17:34:02,218 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 17:34:02,218 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 17:34:02,221 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:34:02" (1/1) ... [2021-11-23 17:34:02,228 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:34:02,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:34:02,251 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 17:34:02,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 17:34:02,295 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 17:34:02,299 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 17:34:02,299 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 17:34:02,299 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 17:34:02,374 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 17:34:02,376 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 17:34:02,524 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 17:34:02,546 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder has thrown an exception: java.lang.UnsupportedOperationException: Set is immutable at de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.addAll(ImmutableSet.java:313) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaBuilder.addBranchEncoders(TransFormulaBuilder.java:170) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.parallelComposition(TransFormulaUtils.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.ParallelComposition.(ParallelComposition.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CodeBlockFactory.constructParallelComposition(CodeBlockFactory.java:109) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder$LargeBlockEncoding.composeParallel(CfgBuilder.java:1792) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder$LargeBlockEncoding.(CfgBuilder.java:1653) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder.createIcfg(CfgBuilder.java:280) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.RCFGBuilderObserver.process(RCFGBuilderObserver.java:88) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.DFSTreeWalker.runObserver(DFSTreeWalker.java:65) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.BaseWalker.runObserver(BaseWalker.java:93) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.BaseWalker.run(BaseWalker.java:86) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$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) [2021-11-23 17:34:02,550 INFO L158 Benchmark]: Toolchain (without parser) took 678.18ms. Allocated memory is still 148.9MB. Free memory was 114.5MB in the beginning and 113.3MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 17:34:02,551 INFO L158 Benchmark]: CDTParser took 0.24ms. Allocated memory is still 88.1MB. Free memory was 58.6MB in the beginning and 58.6MB in the end (delta: 27.7kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 17:34:02,552 INFO L158 Benchmark]: CACSL2BoogieTranslator took 265.41ms. Allocated memory is still 148.9MB. Free memory was 114.2MB in the beginning and 125.3MB in the end (delta: -11.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-23 17:34:02,553 INFO L158 Benchmark]: Boogie Procedure Inliner took 34.95ms. Allocated memory is still 148.9MB. Free memory was 124.9MB in the beginning and 123.6MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 17:34:02,554 INFO L158 Benchmark]: Boogie Preprocessor took 42.06ms. Allocated memory is still 148.9MB. Free memory was 123.6MB in the beginning and 122.8MB in the end (delta: 808.7kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 17:34:02,555 INFO L158 Benchmark]: RCFGBuilder took 331.05ms. Allocated memory is still 148.9MB. Free memory was 122.4MB in the beginning and 113.3MB in the end (delta: 9.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-23 17:34:02,559 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24ms. Allocated memory is still 88.1MB. Free memory was 58.6MB in the beginning and 58.6MB in the end (delta: 27.7kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 265.41ms. Allocated memory is still 148.9MB. Free memory was 114.2MB in the beginning and 125.3MB in the end (delta: -11.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 34.95ms. Allocated memory is still 148.9MB. Free memory was 124.9MB in the beginning and 123.6MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 42.06ms. Allocated memory is still 148.9MB. Free memory was 123.6MB in the beginning and 122.8MB in the end (delta: 808.7kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 331.05ms. Allocated memory is still 148.9MB. Free memory was 122.4MB in the beginning and 113.3MB in the end (delta: 9.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: - ExceptionOrErrorResult: UnsupportedOperationException: Set is immutable de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: UnsupportedOperationException: Set is immutable: de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.addAll(ImmutableSet.java:313) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-11-23 17:34:02,615 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/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_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/bitvector/num_conversion_2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 7e0da033eb6b5a3b4db0394198751cf880534ee28b64f0bd7b196bfba1d785e1 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 17:34:05,007 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 17:34:05,009 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 17:34:05,063 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 17:34:05,064 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 17:34:05,069 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 17:34:05,072 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 17:34:05,079 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 17:34:05,083 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 17:34:05,090 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 17:34:05,092 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 17:34:05,094 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 17:34:05,094 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 17:34:05,097 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 17:34:05,099 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 17:34:05,102 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 17:34:05,104 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 17:34:05,105 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 17:34:05,110 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 17:34:05,120 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 17:34:05,122 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 17:34:05,125 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 17:34:05,128 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 17:34:05,130 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 17:34:05,139 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 17:34:05,139 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 17:34:05,139 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 17:34:05,140 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 17:34:05,141 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 17:34:05,142 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 17:34:05,142 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 17:34:05,143 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 17:34:05,144 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 17:34:05,145 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 17:34:05,146 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 17:34:05,146 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 17:34:05,157 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 17:34:05,158 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 17:34:05,158 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 17:34:05,160 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 17:34:05,161 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 17:34:05,162 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-23 17:34:05,197 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 17:34:05,198 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 17:34:05,198 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 17:34:05,198 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 17:34:05,199 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 17:34:05,199 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 17:34:05,200 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 17:34:05,200 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 17:34:05,200 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 17:34:05,200 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 17:34:05,201 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 17:34:05,201 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 17:34:05,202 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 17:34:05,202 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 17:34:05,202 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 17:34:05,202 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 17:34:05,202 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 17:34:05,203 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 17:34:05,203 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 17:34:05,203 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 17:34:05,203 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-23 17:34:05,204 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-23 17:34:05,204 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 17:34:05,204 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 17:34:05,204 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 17:34:05,204 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 17:34:05,205 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 17:34:05,205 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 17:34:05,205 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 17:34:05,205 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:34:05,206 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 17:34:05,206 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 17:34:05,206 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 17:34:05,206 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-23 17:34:05,207 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-23 17:34:05,207 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 17:34:05,207 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 17:34:05,207 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 17:34:05,207 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_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7e0da033eb6b5a3b4db0394198751cf880534ee28b64f0bd7b196bfba1d785e1 [2021-11-23 17:34:05,571 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 17:34:05,591 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 17:34:05,594 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 17:34:05,595 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 17:34:05,596 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 17:34:05,598 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/bitvector/num_conversion_2.c [2021-11-23 17:34:05,660 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/data/3c4584762/49c674fb482747c3aebb7660541f0cfd/FLAG5b306f5ac [2021-11-23 17:34:06,201 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 17:34:06,202 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/sv-benchmarks/c/bitvector/num_conversion_2.c [2021-11-23 17:34:06,212 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/data/3c4584762/49c674fb482747c3aebb7660541f0cfd/FLAG5b306f5ac [2021-11-23 17:34:06,547 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/data/3c4584762/49c674fb482747c3aebb7660541f0cfd [2021-11-23 17:34:06,552 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 17:34:06,555 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 17:34:06,561 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 17:34:06,561 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 17:34:06,565 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 17:34:06,567 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:34:06" (1/1) ... [2021-11-23 17:34:06,570 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2dd9d395 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:34:06, skipping insertion in model container [2021-11-23 17:34:06,570 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:34:06" (1/1) ... [2021-11-23 17:34:06,578 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 17:34:06,619 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 17:34:06,740 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_640c6691-a532-4708-af31-0f8cdaa76b23/sv-benchmarks/c/bitvector/num_conversion_2.c[685,698] [2021-11-23 17:34:06,754 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:34:06,764 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 17:34:06,777 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_640c6691-a532-4708-af31-0f8cdaa76b23/sv-benchmarks/c/bitvector/num_conversion_2.c[685,698] [2021-11-23 17:34:06,782 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:34:06,795 INFO L208 MainTranslator]: Completed translation [2021-11-23 17:34:06,795 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:34:06 WrapperNode [2021-11-23 17:34:06,796 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 17:34:06,797 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 17:34:06,797 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 17:34:06,797 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 17:34:06,826 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:34:06" (1/1) ... [2021-11-23 17:34:06,853 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:34:06" (1/1) ... [2021-11-23 17:34:06,882 INFO L137 Inliner]: procedures = 13, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 34 [2021-11-23 17:34:06,884 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 17:34:06,885 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 17:34:06,886 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 17:34:06,886 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 17:34:06,894 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:34:06" (1/1) ... [2021-11-23 17:34:06,894 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:34:06" (1/1) ... [2021-11-23 17:34:06,907 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:34:06" (1/1) ... [2021-11-23 17:34:06,908 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:34:06" (1/1) ... [2021-11-23 17:34:06,920 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:34:06" (1/1) ... [2021-11-23 17:34:06,924 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:34:06" (1/1) ... [2021-11-23 17:34:06,926 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:34:06" (1/1) ... [2021-11-23 17:34:06,933 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 17:34:06,934 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 17:34:06,935 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 17:34:06,936 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 17:34:06,939 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:34:06" (1/1) ... [2021-11-23 17:34:06,946 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:34:06,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:34:06,974 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 17:34:06,990 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 17:34:07,022 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 17:34:07,022 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 17:34:07,022 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 17:34:07,023 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-23 17:34:07,098 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 17:34:07,100 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 17:34:07,239 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 17:34:07,244 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 17:34:07,246 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-23 17:34:07,248 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:34:07 BoogieIcfgContainer [2021-11-23 17:34:07,249 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 17:34:07,251 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 17:34:07,251 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 17:34:07,254 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 17:34:07,254 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 05:34:06" (1/3) ... [2021-11-23 17:34:07,255 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f5b7ece and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 05:34:07, skipping insertion in model container [2021-11-23 17:34:07,255 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:34:06" (2/3) ... [2021-11-23 17:34:07,256 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f5b7ece and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 05:34:07, skipping insertion in model container [2021-11-23 17:34:07,256 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:34:07" (3/3) ... [2021-11-23 17:34:07,260 INFO L111 eAbstractionObserver]: Analyzing ICFG num_conversion_2.c [2021-11-23 17:34:07,266 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 17:34:07,267 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 17:34:07,326 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 17:34:07,336 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 17:34:07,337 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 17:34:07,362 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:34:07,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-23 17:34:07,374 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:34:07,374 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-23 17:34:07,375 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:34:07,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:34:07,385 INFO L85 PathProgramCache]: Analyzing trace with hash 889968487, now seen corresponding path program 1 times [2021-11-23 17:34:07,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:34:07,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1758779797] [2021-11-23 17:34:07,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:34:07,399 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:34:07,400 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:34:07,406 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:34:07,456 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-23 17:34:07,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:34:07,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-23 17:34:07,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:34:07,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:34:07,540 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:34:07,541 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:34:07,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1758779797] [2021-11-23 17:34:07,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1758779797] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:34:07,542 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:34:07,543 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 17:34:07,544 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029298799] [2021-11-23 17:34:07,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:34:07,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-23 17:34:07,550 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:34:07,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-23 17:34:07,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 17:34:07,602 INFO L87 Difference]: Start difference. First operand has 13 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:34:07,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:34:07,615 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2021-11-23 17:34:07,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-23 17:34:07,618 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-23 17:34:07,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:34:07,625 INFO L225 Difference]: With dead ends: 21 [2021-11-23 17:34:07,626 INFO L226 Difference]: Without dead ends: 9 [2021-11-23 17:34:07,628 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 17:34:07,636 INFO L933 BasicCegarLoop]: 14 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, 14 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:34:07,638 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:34:07,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-11-23 17:34:07,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-11-23 17:34:07,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:34:07,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2021-11-23 17:34:07,671 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 6 [2021-11-23 17:34:07,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:34:07,672 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2021-11-23 17:34:07,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:34:07,672 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2021-11-23 17:34:07,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-23 17:34:07,674 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:34:07,674 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-23 17:34:07,689 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-23 17:34:07,884 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:34:07,884 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:34:07,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:34:07,886 INFO L85 PathProgramCache]: Analyzing trace with hash 889640786, now seen corresponding path program 1 times [2021-11-23 17:34:07,886 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:34:07,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1329924063] [2021-11-23 17:34:07,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:34:07,887 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:34:07,887 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:34:07,895 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:34:07,904 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-23 17:34:07,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:34:07,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:34:07,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:34:08,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:34:08,005 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:34:08,005 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:34:08,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1329924063] [2021-11-23 17:34:08,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1329924063] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:34:08,006 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:34:08,006 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:34:08,006 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235514696] [2021-11-23 17:34:08,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:34:08,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:34:08,008 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:34:08,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:34:08,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:34:08,009 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:34:08,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:34:08,022 INFO L93 Difference]: Finished difference Result 16 states and 18 transitions. [2021-11-23 17:34:08,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:34:08,023 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-23 17:34:08,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:34:08,024 INFO L225 Difference]: With dead ends: 16 [2021-11-23 17:34:08,024 INFO L226 Difference]: Without dead ends: 12 [2021-11-23 17:34:08,024 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:34:08,026 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 3 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:34:08,027 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 14 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:34:08,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-11-23 17:34:08,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 10. [2021-11-23 17:34:08,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:34:08,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2021-11-23 17:34:08,032 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 6 [2021-11-23 17:34:08,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:34:08,032 INFO L470 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2021-11-23 17:34:08,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:34:08,033 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2021-11-23 17:34:08,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-23 17:34:08,033 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:34:08,033 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:34:08,048 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-23 17:34:08,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:34:08,244 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:34:08,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:34:08,245 INFO L85 PathProgramCache]: Analyzing trace with hash 641725625, now seen corresponding path program 1 times [2021-11-23 17:34:08,246 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:34:08,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1511347259] [2021-11-23 17:34:08,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:34:08,247 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:34:08,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:34:08,248 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:34:08,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-23 17:34:08,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:34:08,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:34:08,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:34:08,338 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:34:08,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:34:08,384 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:34:08,385 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:34:08,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1511347259] [2021-11-23 17:34:08,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1511347259] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:34:08,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [196400289] [2021-11-23 17:34:08,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:34:08,386 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:34:08,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:34:08,387 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:34:08,395 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2021-11-23 17:34:08,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:34:08,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:34:08,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:34:08,491 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:34:08,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:34:08,539 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:34:08,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [196400289] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:34:08,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735121796] [2021-11-23 17:34:08,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:34:08,541 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:34:08,541 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:34:08,545 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:34:08,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 17:34:08,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:34:08,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:34:08,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:34:08,616 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:34:08,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:34:08,660 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:34:08,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735121796] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:34:08,661 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:34:08,661 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 5] total 7 [2021-11-23 17:34:08,662 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733219729] [2021-11-23 17:34:08,662 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:34:08,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 17:34:08,663 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:34:08,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 17:34:08,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-23 17:34:08,664 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:34:08,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:34:08,704 INFO L93 Difference]: Finished difference Result 23 states and 29 transitions. [2021-11-23 17:34:08,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 17:34:08,705 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-23 17:34:08,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:34:08,706 INFO L225 Difference]: With dead ends: 23 [2021-11-23 17:34:08,706 INFO L226 Difference]: Without dead ends: 19 [2021-11-23 17:34:08,707 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:34:08,708 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 26 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:34:08,709 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 27 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:34:08,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-11-23 17:34:08,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-11-23 17:34:08,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:34:08,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2021-11-23 17:34:08,714 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 9 [2021-11-23 17:34:08,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:34:08,715 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2021-11-23 17:34:08,715 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:34:08,715 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2021-11-23 17:34:08,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-23 17:34:08,716 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:34:08,716 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1] [2021-11-23 17:34:08,722 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (5)] Forceful destruction successful, exit code 0 [2021-11-23 17:34:08,938 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-11-23 17:34:09,125 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-23 17:34:09,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:34:09,319 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:34:09,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:34:09,320 INFO L85 PathProgramCache]: Analyzing trace with hash 1171899538, now seen corresponding path program 2 times [2021-11-23 17:34:09,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:34:09,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [869369616] [2021-11-23 17:34:09,321 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 17:34:09,321 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:34:09,322 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:34:09,325 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:34:09,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-23 17:34:09,370 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 17:34:09,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:34:09,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 17:34:09,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:34:09,499 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:34:09,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:34:09,648 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:34:09,649 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:34:09,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [869369616] [2021-11-23 17:34:09,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [869369616] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:34:09,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1636899471] [2021-11-23 17:34:09,650 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 17:34:09,650 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:34:09,651 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:34:09,652 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:34:09,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2021-11-23 17:34:09,738 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 17:34:09,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:34:09,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 17:34:09,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:34:09,821 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:34:09,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:34:09,887 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:34:09,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1636899471] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:34:09,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000636398] [2021-11-23 17:34:09,889 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 17:34:09,889 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:34:09,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:34:09,894 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:34:09,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-23 17:34:09,934 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 17:34:09,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:34:09,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 17:34:09,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:34:09,998 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:34:09,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:34:10,221 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:34:10,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000636398] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:34:10,223 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:34:10,223 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 8] total 16 [2021-11-23 17:34:10,223 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031372215] [2021-11-23 17:34:10,223 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:34:10,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-23 17:34:10,225 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:34:10,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-23 17:34:10,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-11-23 17:34:10,228 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:34:10,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:34:10,508 INFO L93 Difference]: Finished difference Result 41 states and 56 transitions. [2021-11-23 17:34:10,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-23 17:34:10,508 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-23 17:34:10,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:34:10,509 INFO L225 Difference]: With dead ends: 41 [2021-11-23 17:34:10,509 INFO L226 Difference]: Without dead ends: 37 [2021-11-23 17:34:10,510 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=138, Invalid=282, Unknown=0, NotChecked=0, Total=420 [2021-11-23 17:34:10,511 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 77 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:34:10,512 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 90 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 17:34:10,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-11-23 17:34:10,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-11-23 17:34:10,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.3333333333333333) internal successors, (48), 36 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:34:10,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2021-11-23 17:34:10,529 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 18 [2021-11-23 17:34:10,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:34:10,529 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2021-11-23 17:34:10,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:34:10,530 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2021-11-23 17:34:10,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-23 17:34:10,531 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:34:10,531 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1] [2021-11-23 17:34:10,540 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (8)] Forceful destruction successful, exit code 0 [2021-11-23 17:34:10,752 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-23 17:34:10,939 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-11-23 17:34:11,133 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:34:11,134 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:34:11,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:34:11,134 INFO L85 PathProgramCache]: Analyzing trace with hash -1720528430, now seen corresponding path program 3 times [2021-11-23 17:34:11,135 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:34:11,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [79893448] [2021-11-23 17:34:11,135 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 17:34:11,136 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:34:11,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:34:11,142 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:34:11,143 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-23 17:34:11,176 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-11-23 17:34:11,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:34:11,178 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-23 17:34:11,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:34:14,991 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 40 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:34:14,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:34:19,154 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 9 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:34:19,154 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:34:19,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [79893448] [2021-11-23 17:34:19,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [79893448] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:34:19,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [210565570] [2021-11-23 17:34:19,155 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 17:34:19,155 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:34:19,156 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:34:19,164 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:34:19,165 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-11-23 17:34:19,249 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-11-23 17:34:19,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:34:19,250 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-23 17:34:19,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:34:20,379 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 40 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:34:20,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:34:21,738 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 9 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:34:21,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [210565570] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:34:21,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826486653] [2021-11-23 17:34:21,738 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 17:34:21,739 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:34:21,739 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:34:21,741 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:34:21,745 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-23 17:34:21,787 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-11-23 17:34:21,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:34:21,789 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-23 17:34:21,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:34:24,737 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:34:24,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:34:27,548 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:34:27,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826486653] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:34:27,548 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:34:27,548 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28, 28, 29, 29] total 83 [2021-11-23 17:34:27,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677837406] [2021-11-23 17:34:27,549 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:34:27,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2021-11-23 17:34:27,550 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:34:27,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2021-11-23 17:34:27,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1746, Invalid=5060, Unknown=0, NotChecked=0, Total=6806 [2021-11-23 17:34:27,556 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand has 83 states, 83 states have (on average 1.072289156626506) internal successors, (89), 83 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:35:41,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:35:41,990 INFO L93 Difference]: Finished difference Result 294 states and 395 transitions. [2021-11-23 17:35:41,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 148 states. [2021-11-23 17:35:41,990 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 1.072289156626506) internal successors, (89), 83 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-11-23 17:35:41,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:35:41,995 INFO L225 Difference]: With dead ends: 294 [2021-11-23 17:35:41,996 INFO L226 Difference]: Without dead ends: 278 [2021-11-23 17:35:42,016 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 91 SyntacticMatches, 5 SemanticMatches, 213 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 18725 ImplicationChecksByTransitivity, 82.7s TimeCoverageRelationStatistics Valid=10783, Invalid=35227, Unknown=0, NotChecked=0, Total=46010 [2021-11-23 17:35:42,017 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 346 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 828 mSolverCounterSat, 271 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 346 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 2357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 271 IncrementalHoareTripleChecker+Valid, 828 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1258 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-23 17:35:42,017 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [346 Valid, 197 Invalid, 2357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [271 Valid, 828 Invalid, 0 Unknown, 1258 Unchecked, 1.3s Time] [2021-11-23 17:35:42,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-11-23 17:35:42,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 182. [2021-11-23 17:35:42,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 1.3812154696132597) internal successors, (250), 181 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:35:42,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 250 transitions. [2021-11-23 17:35:42,062 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 250 transitions. Word has length 30 [2021-11-23 17:35:42,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:35:42,062 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 250 transitions. [2021-11-23 17:35:42,062 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 1.072289156626506) internal successors, (89), 83 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:35:42,063 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 250 transitions. [2021-11-23 17:35:42,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-23 17:35:42,065 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:35:42,065 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:35:42,079 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-23 17:35:42,277 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2021-11-23 17:35:42,496 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-23 17:35:42,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:35:42,677 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:35:42,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:35:42,678 INFO L85 PathProgramCache]: Analyzing trace with hash -1777786732, now seen corresponding path program 1 times [2021-11-23 17:35:42,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:35:42,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1869718439] [2021-11-23 17:35:42,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:35:42,679 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:35:42,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:35:42,680 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:35:42,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-23 17:35:42,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:35:42,706 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-23 17:35:42,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:35:43,941 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:35:43,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:35:47,278 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:35:47,279 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:35:47,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1869718439] [2021-11-23 17:35:47,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1869718439] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:35:47,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [682823834] [2021-11-23 17:35:47,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:35:47,279 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:35:47,279 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:35:47,281 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:35:47,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-11-23 17:35:47,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:35:47,342 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-23 17:35:47,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:35:47,849 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:35:47,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:35:48,513 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:35:48,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [682823834] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:35:48,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808194660] [2021-11-23 17:35:48,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:35:48,513 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:35:48,513 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:35:48,514 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:35:48,515 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-23 17:35:48,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:35:48,574 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 47 conjunts are in the unsatisfiable core [2021-11-23 17:35:48,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:35:49,557 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:35:49,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:35:54,680 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:35:54,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808194660] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:35:54,680 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:35:54,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27, 27, 29, 29] total 80 [2021-11-23 17:35:54,681 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981960982] [2021-11-23 17:35:54,681 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:35:54,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2021-11-23 17:35:54,682 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:35:54,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-11-23 17:35:54,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1214, Invalid=5106, Unknown=0, NotChecked=0, Total=6320 [2021-11-23 17:35:54,684 INFO L87 Difference]: Start difference. First operand 182 states and 250 transitions. Second operand has 80 states, 80 states have (on average 1.1) internal successors, (88), 80 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:37:00,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:37:00,555 INFO L93 Difference]: Finished difference Result 492 states and 682 transitions. [2021-11-23 17:37:00,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 211 states. [2021-11-23 17:37:00,556 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 1.1) internal successors, (88), 80 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-11-23 17:37:00,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:37:00,560 INFO L225 Difference]: With dead ends: 492 [2021-11-23 17:37:00,560 INFO L226 Difference]: Without dead ends: 478 [2021-11-23 17:37:00,570 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 375 GetRequests, 99 SyntacticMatches, 4 SemanticMatches, 272 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24698 ImplicationChecksByTransitivity, 69.6s TimeCoverageRelationStatistics Valid=9781, Invalid=65021, Unknown=0, NotChecked=0, Total=74802 [2021-11-23 17:37:00,571 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 693 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 2026 mSolverCounterSat, 825 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 693 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 3131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 825 IncrementalHoareTripleChecker+Valid, 2026 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 280 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:37:00,572 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [693 Valid, 135 Invalid, 3131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [825 Valid, 2026 Invalid, 0 Unknown, 280 Unchecked, 4.0s Time] [2021-11-23 17:37:00,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2021-11-23 17:37:00,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 317. [2021-11-23 17:37:00,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 316 states have (on average 1.3670886075949367) internal successors, (432), 316 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:37:00,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 432 transitions. [2021-11-23 17:37:00,653 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 432 transitions. Word has length 30 [2021-11-23 17:37:00,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:37:00,654 INFO L470 AbstractCegarLoop]: Abstraction has 317 states and 432 transitions. [2021-11-23 17:37:00,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 1.1) internal successors, (88), 80 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:37:00,654 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 432 transitions. [2021-11-23 17:37:00,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-23 17:37:00,657 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:37:00,658 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:37:00,680 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-11-23 17:37:00,872 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-23 17:37:01,065 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2021-11-23 17:37:01,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:37:01,264 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:37:01,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:37:01,265 INFO L85 PathProgramCache]: Analyzing trace with hash 1894380496, now seen corresponding path program 2 times [2021-11-23 17:37:01,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:37:01,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1701435401] [2021-11-23 17:37:01,265 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 17:37:01,265 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:37:01,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:37:01,266 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:37:01,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-23 17:37:01,297 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 17:37:01,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:37:01,299 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-23 17:37:01,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:37:02,507 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:37:02,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:37:06,035 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 2 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:37:06,035 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:37:06,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1701435401] [2021-11-23 17:37:06,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1701435401] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:37:06,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [505472555] [2021-11-23 17:37:06,036 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 17:37:06,036 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:37:06,037 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:37:06,044 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:37:06,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-23 17:37:06,156 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 17:37:06,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:37:06,159 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-23 17:37:06,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:37:06,888 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:37:06,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:37:07,607 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 2 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:37:07,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [505472555] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:37:07,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051895605] [2021-11-23 17:37:07,608 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 17:37:07,608 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:37:07,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:37:07,617 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:37:07,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-23 17:37:07,663 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 17:37:07,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:37:07,665 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 47 conjunts are in the unsatisfiable core [2021-11-23 17:37:07,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:37:08,482 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:37:08,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:37:14,488 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:37:14,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051895605] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:37:14,488 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:37:14,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27, 27, 29, 29] total 80 [2021-11-23 17:37:14,489 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245906648] [2021-11-23 17:37:14,489 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:37:14,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2021-11-23 17:37:14,490 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:37:14,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-11-23 17:37:14,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1164, Invalid=5156, Unknown=0, NotChecked=0, Total=6320 [2021-11-23 17:37:14,492 INFO L87 Difference]: Start difference. First operand 317 states and 432 transitions. Second operand has 80 states, 80 states have (on average 1.1) internal successors, (88), 80 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:38:47,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:38:47,229 INFO L93 Difference]: Finished difference Result 566 states and 771 transitions. [2021-11-23 17:38:47,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 202 states. [2021-11-23 17:38:47,229 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 1.1) internal successors, (88), 80 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-11-23 17:38:47,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:38:47,232 INFO L225 Difference]: With dead ends: 566 [2021-11-23 17:38:47,232 INFO L226 Difference]: Without dead ends: 493 [2021-11-23 17:38:47,237 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 265 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22468 ImplicationChecksByTransitivity, 97.3s TimeCoverageRelationStatistics Valid=11468, Invalid=59554, Unknown=0, NotChecked=0, Total=71022 [2021-11-23 17:38:47,238 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 652 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 1906 mSolverCounterSat, 804 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 652 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 2919 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 804 IncrementalHoareTripleChecker+Valid, 1906 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 209 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2021-11-23 17:38:47,238 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [652 Valid, 134 Invalid, 2919 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [804 Valid, 1906 Invalid, 0 Unknown, 209 Unchecked, 3.9s Time] [2021-11-23 17:38:47,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2021-11-23 17:38:47,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 333. [2021-11-23 17:38:47,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 1.3614457831325302) internal successors, (452), 332 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:38:47,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 452 transitions. [2021-11-23 17:38:47,306 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 452 transitions. Word has length 30 [2021-11-23 17:38:47,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:38:47,306 INFO L470 AbstractCegarLoop]: Abstraction has 333 states and 452 transitions. [2021-11-23 17:38:47,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 1.1) internal successors, (88), 80 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:38:47,306 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 452 transitions. [2021-11-23 17:38:47,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-23 17:38:47,309 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:38:47,309 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:38:47,318 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-23 17:38:47,533 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-23 17:38:47,715 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-11-23 17:38:47,914 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:38:47,914 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:38:47,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:38:47,915 INFO L85 PathProgramCache]: Analyzing trace with hash -1978693868, now seen corresponding path program 3 times [2021-11-23 17:38:47,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:38:47,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [769461443] [2021-11-23 17:38:47,915 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 17:38:47,915 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:38:47,915 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:38:47,916 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:38:47,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-23 17:38:47,967 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-11-23 17:38:47,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:38:47,969 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-23 17:38:47,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:38:50,114 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 9 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:38:50,115 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:38:54,680 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 9 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:38:54,680 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:38:54,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [769461443] [2021-11-23 17:38:54,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [769461443] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:38:54,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [704784867] [2021-11-23 17:38:54,681 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 17:38:54,681 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:38:54,681 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:38:54,681 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:38:54,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2021-11-23 17:38:54,753 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-11-23 17:38:54,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:38:54,754 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-23 17:38:54,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:38:55,626 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 9 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:38:55,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:38:56,901 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 9 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:38:56,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [704784867] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:38:56,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757566430] [2021-11-23 17:38:56,902 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 17:38:56,902 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:38:56,903 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:38:56,905 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:38:56,906 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-23 17:38:56,938 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-11-23 17:38:56,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:38:56,940 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 47 conjunts are in the unsatisfiable core [2021-11-23 17:38:56,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:38:59,897 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:38:59,897 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:39:03,798 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:39:03,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757566430] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:39:03,798 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:39:03,799 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28, 28, 29, 29] total 84 [2021-11-23 17:39:03,799 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43451471] [2021-11-23 17:39:03,799 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:39:03,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2021-11-23 17:39:03,800 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:39:03,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2021-11-23 17:39:03,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1412, Invalid=5560, Unknown=0, NotChecked=0, Total=6972 [2021-11-23 17:39:03,803 INFO L87 Difference]: Start difference. First operand 333 states and 452 transitions. Second operand has 84 states, 84 states have (on average 1.0714285714285714) internal successors, (90), 84 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:39:24,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:39:24,312 INFO L93 Difference]: Finished difference Result 506 states and 690 transitions. [2021-11-23 17:39:24,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-11-23 17:39:24,313 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 1.0714285714285714) internal successors, (90), 84 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-11-23 17:39:24,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:39:24,315 INFO L225 Difference]: With dead ends: 506 [2021-11-23 17:39:24,316 INFO L226 Difference]: Without dead ends: 454 [2021-11-23 17:39:24,318 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 91 SyntacticMatches, 2 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 6885 ImplicationChecksByTransitivity, 29.8s TimeCoverageRelationStatistics Valid=3814, Invalid=14818, Unknown=0, NotChecked=0, Total=18632 [2021-11-23 17:39:24,319 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 196 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 556 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 1770 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1060 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:39:24,319 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 84 Invalid, 1770 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 556 Invalid, 0 Unknown, 1060 Unchecked, 1.0s Time] [2021-11-23 17:39:24,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2021-11-23 17:39:24,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 377. [2021-11-23 17:39:24,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 376 states have (on average 1.3643617021276595) internal successors, (513), 376 states have internal predecessors, (513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:39:24,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 513 transitions. [2021-11-23 17:39:24,388 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 513 transitions. Word has length 30 [2021-11-23 17:39:24,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:39:24,388 INFO L470 AbstractCegarLoop]: Abstraction has 377 states and 513 transitions. [2021-11-23 17:39:24,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 1.0714285714285714) internal successors, (90), 84 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:39:24,389 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 513 transitions. [2021-11-23 17:39:24,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-23 17:39:24,390 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:39:24,390 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 6, 2, 1, 1, 1, 1, 1, 1] [2021-11-23 17:39:24,411 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-23 17:39:24,592 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (20)] Forceful destruction successful, exit code 0 [2021-11-23 17:39:24,798 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-23 17:39:24,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:39:24,991 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:39:24,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:39:24,992 INFO L85 PathProgramCache]: Analyzing trace with hash -2035952170, now seen corresponding path program 4 times [2021-11-23 17:39:24,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:39:24,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1928955728] [2021-11-23 17:39:24,992 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 17:39:24,992 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:39:24,992 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:39:24,993 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:39:24,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-23 17:39:25,017 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 17:39:25,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:39:25,018 WARN L261 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-23 17:39:25,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:39:26,183 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:39:26,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:39:30,231 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:39:30,232 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:39:30,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1928955728] [2021-11-23 17:39:30,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1928955728] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:39:30,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [355861923] [2021-11-23 17:39:30,232 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 17:39:30,232 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:39:30,232 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:39:30,233 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:39:30,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-11-23 17:39:30,301 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 17:39:30,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:39:30,302 WARN L261 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-23 17:39:30,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:39:30,905 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:39:30,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:39:31,757 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:39:31,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [355861923] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:39:31,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159747851] [2021-11-23 17:39:31,758 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 17:39:31,758 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:39:31,758 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:39:31,759 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:39:31,760 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-23 17:39:31,796 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 17:39:31,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:39:31,798 WARN L261 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-23 17:39:31,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:39:32,952 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:39:32,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:39:39,186 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:39:39,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159747851] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:39:39,188 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:39:39,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27, 27, 29, 29] total 80 [2021-11-23 17:39:39,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566738193] [2021-11-23 17:39:39,189 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:39:39,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2021-11-23 17:39:39,190 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:39:39,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-11-23 17:39:39,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1180, Invalid=5140, Unknown=0, NotChecked=0, Total=6320 [2021-11-23 17:39:39,192 INFO L87 Difference]: Start difference. First operand 377 states and 513 transitions. Second operand has 80 states, 80 states have (on average 1.1) internal successors, (88), 80 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:40:45,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:40:45,299 INFO L93 Difference]: Finished difference Result 602 states and 813 transitions. [2021-11-23 17:40:45,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 155 states. [2021-11-23 17:40:45,300 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 1.1) internal successors, (88), 80 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-11-23 17:40:45,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:40:45,303 INFO L225 Difference]: With dead ends: 602 [2021-11-23 17:40:45,304 INFO L226 Difference]: Without dead ends: 533 [2021-11-23 17:40:45,308 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 216 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13743 ImplicationChecksByTransitivity, 71.4s TimeCoverageRelationStatistics Valid=6742, Invalid=40564, Unknown=0, NotChecked=0, Total=47306 [2021-11-23 17:40:45,311 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 512 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 2103 mSolverCounterSat, 714 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 512 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 2929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 714 IncrementalHoareTripleChecker+Valid, 2103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 112 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2021-11-23 17:40:45,312 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [512 Valid, 131 Invalid, 2929 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [714 Valid, 2103 Invalid, 0 Unknown, 112 Unchecked, 4.2s Time] [2021-11-23 17:40:45,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2021-11-23 17:40:45,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 387. [2021-11-23 17:40:45,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 386 states have (on average 1.3704663212435233) internal successors, (529), 386 states have internal predecessors, (529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:40:45,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 529 transitions. [2021-11-23 17:40:45,379 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 529 transitions. Word has length 30 [2021-11-23 17:40:45,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:40:45,380 INFO L470 AbstractCegarLoop]: Abstraction has 387 states and 529 transitions. [2021-11-23 17:40:45,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 1.1) internal successors, (88), 80 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:40:45,380 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 529 transitions. [2021-11-23 17:40:45,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-23 17:40:45,382 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:40:45,382 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 6, 2, 1, 1, 1, 1, 1, 1] [2021-11-23 17:40:45,420 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2021-11-23 17:40:45,613 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2021-11-23 17:40:45,815 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (22)] Ended with exit code 0 [2021-11-23 17:40:46,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:40:46,009 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:40:46,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:40:46,009 INFO L85 PathProgramCache]: Analyzing trace with hash 1636215058, now seen corresponding path program 5 times [2021-11-23 17:40:46,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:40:46,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1569171311] [2021-11-23 17:40:46,009 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-23 17:40:46,010 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:40:46,010 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:40:46,010 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:40:46,015 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-23 17:40:46,043 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-11-23 17:40:46,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:40:46,045 WARN L261 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 45 conjunts are in the unsatisfiable core [2021-11-23 17:40:46,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:40:47,285 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:40:47,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:40:51,583 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 2 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:40:51,583 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:40:51,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1569171311] [2021-11-23 17:40:51,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1569171311] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:40:51,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [762476429] [2021-11-23 17:40:51,583 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-23 17:40:51,584 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:40:51,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:40:51,585 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:40:51,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2021-11-23 17:40:51,651 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-11-23 17:40:51,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:40:51,652 WARN L261 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-23 17:40:51,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:40:52,218 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:40:52,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:40:53,369 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 2 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:40:53,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [762476429] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:40:53,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961689045] [2021-11-23 17:40:53,370 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-23 17:40:53,370 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:40:53,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:40:53,370 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:40:53,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-23 17:40:53,404 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-11-23 17:40:53,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:40:53,405 WARN L261 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-23 17:40:53,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:40:54,175 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:40:54,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:41:00,409 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:41:00,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1961689045] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:41:00,410 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:41:00,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27, 27, 29, 29] total 80 [2021-11-23 17:41:00,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011894063] [2021-11-23 17:41:00,410 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:41:00,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2021-11-23 17:41:00,411 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:41:00,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-11-23 17:41:00,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1180, Invalid=5140, Unknown=0, NotChecked=0, Total=6320 [2021-11-23 17:41:00,412 INFO L87 Difference]: Start difference. First operand 387 states and 529 transitions. Second operand has 80 states, 80 states have (on average 1.1125) internal successors, (89), 80 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:42:03,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:42:03,542 INFO L93 Difference]: Finished difference Result 617 states and 839 transitions. [2021-11-23 17:42:03,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 157 states. [2021-11-23 17:42:03,543 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 1.1125) internal successors, (89), 80 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-11-23 17:42:03,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:42:03,546 INFO L225 Difference]: With dead ends: 617 [2021-11-23 17:42:03,547 INFO L226 Difference]: Without dead ends: 554 [2021-11-23 17:42:03,550 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 218 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13806 ImplicationChecksByTransitivity, 69.4s TimeCoverageRelationStatistics Valid=7359, Invalid=40821, Unknown=0, NotChecked=0, Total=48180 [2021-11-23 17:42:03,551 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 516 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 1973 mSolverCounterSat, 582 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 516 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 2766 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 582 IncrementalHoareTripleChecker+Valid, 1973 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 211 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2021-11-23 17:42:03,551 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [516 Valid, 101 Invalid, 2766 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [582 Valid, 1973 Invalid, 0 Unknown, 211 Unchecked, 3.3s Time] [2021-11-23 17:42:03,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2021-11-23 17:42:03,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 405. [2021-11-23 17:42:03,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 404 states have (on average 1.3613861386138615) internal successors, (550), 404 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:42:03,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 550 transitions. [2021-11-23 17:42:03,615 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 550 transitions. Word has length 30 [2021-11-23 17:42:03,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:42:03,615 INFO L470 AbstractCegarLoop]: Abstraction has 405 states and 550 transitions. [2021-11-23 17:42:03,615 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 1.1125) internal successors, (89), 80 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:42:03,616 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 550 transitions. [2021-11-23 17:42:03,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-23 17:42:03,617 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:42:03,617 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 5, 3, 1, 1, 1, 1, 1, 1] [2021-11-23 17:42:03,647 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2021-11-23 17:42:03,840 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-23 17:42:04,033 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (26)] Forceful destruction successful, exit code 0 [2021-11-23 17:42:04,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:42:04,232 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:42:04,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:42:04,233 INFO L85 PathProgramCache]: Analyzing trace with hash 1578956756, now seen corresponding path program 6 times [2021-11-23 17:42:04,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:42:04,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [303932755] [2021-11-23 17:42:04,233 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-23 17:42:04,234 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:42:04,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:42:04,235 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:42:04,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-23 17:42:04,269 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-11-23 17:42:04,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:42:04,271 WARN L261 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-23 17:42:04,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:42:05,928 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:42:05,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:42:10,388 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:42:10,388 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:42:10,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [303932755] [2021-11-23 17:42:10,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [303932755] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:42:10,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [586210605] [2021-11-23 17:42:10,389 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-23 17:42:10,389 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:42:10,389 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:42:10,390 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:42:10,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2021-11-23 17:42:10,451 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-11-23 17:42:10,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:42:10,452 WARN L261 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-23 17:42:10,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:42:11,117 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:42:11,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:42:12,159 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:42:12,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [586210605] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:42:12,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078977830] [2021-11-23 17:42:12,160 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-23 17:42:12,160 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:42:12,160 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:42:12,161 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:42:12,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-23 17:42:12,197 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-11-23 17:42:12,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:42:12,199 WARN L261 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-23 17:42:12,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:42:13,811 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:42:13,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:42:19,290 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:42:19,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078977830] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:42:19,290 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:42:19,290 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28, 28, 29, 29] total 84 [2021-11-23 17:42:19,290 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199912688] [2021-11-23 17:42:19,290 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:42:19,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2021-11-23 17:42:19,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:42:19,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2021-11-23 17:42:19,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1279, Invalid=5693, Unknown=0, NotChecked=0, Total=6972 [2021-11-23 17:42:19,292 INFO L87 Difference]: Start difference. First operand 405 states and 550 transitions. Second operand has 84 states, 84 states have (on average 1.0714285714285714) internal successors, (90), 84 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:43:00,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:43:00,604 INFO L93 Difference]: Finished difference Result 556 states and 744 transitions. [2021-11-23 17:43:00,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2021-11-23 17:43:00,604 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 1.0714285714285714) internal successors, (90), 84 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-11-23 17:43:00,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:43:00,608 INFO L225 Difference]: With dead ends: 556 [2021-11-23 17:43:00,608 INFO L226 Difference]: Without dead ends: 489 [2021-11-23 17:43:00,610 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 91 SyntacticMatches, 2 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 8603 ImplicationChecksByTransitivity, 50.1s TimeCoverageRelationStatistics Valid=5004, Invalid=22718, Unknown=0, NotChecked=0, Total=27722 [2021-11-23 17:43:00,611 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 256 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 843 mSolverCounterSat, 313 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 2461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 313 IncrementalHoareTripleChecker+Valid, 843 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1305 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-23 17:43:00,611 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [256 Valid, 88 Invalid, 2461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [313 Valid, 843 Invalid, 0 Unknown, 1305 Unchecked, 1.5s Time] [2021-11-23 17:43:00,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2021-11-23 17:43:00,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 395. [2021-11-23 17:43:00,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 394 states have (on average 1.3604060913705585) internal successors, (536), 394 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:43:00,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 536 transitions. [2021-11-23 17:43:00,696 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 536 transitions. Word has length 30 [2021-11-23 17:43:00,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:43:00,697 INFO L470 AbstractCegarLoop]: Abstraction has 395 states and 536 transitions. [2021-11-23 17:43:00,697 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 1.0714285714285714) internal successors, (90), 84 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:43:00,697 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 536 transitions. [2021-11-23 17:43:00,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-23 17:43:00,698 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:43:00,699 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 6, 2, 1, 1, 1, 1, 1, 1] [2021-11-23 17:43:00,709 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (29)] Forceful destruction successful, exit code 0 [2021-11-23 17:43:00,915 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-23 17:43:01,129 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-11-23 17:43:01,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:43:01,312 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:43:01,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:43:01,313 INFO L85 PathProgramCache]: Analyzing trace with hash -497923054, now seen corresponding path program 7 times [2021-11-23 17:43:01,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:43:01,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [927379920] [2021-11-23 17:43:01,313 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 17:43:01,313 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:43:01,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:43:01,314 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:43:01,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-23 17:43:01,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:43:01,337 WARN L261 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-23 17:43:01,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:43:02,567 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:43:02,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:43:06,018 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:43:06,018 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:43:06,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [927379920] [2021-11-23 17:43:06,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [927379920] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:43:06,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1976843786] [2021-11-23 17:43:06,018 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 17:43:06,018 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:43:06,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:43:06,019 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:43:06,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2021-11-23 17:43:06,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:43:06,076 WARN L261 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-23 17:43:06,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:43:06,566 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:43:06,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:43:07,186 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:43:07,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1976843786] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:43:07,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975024642] [2021-11-23 17:43:07,186 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 17:43:07,187 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:43:07,187 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:43:07,187 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:43:07,188 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-23 17:43:07,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:43:07,226 WARN L261 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-23 17:43:07,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:43:08,024 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:43:08,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:43:13,479 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:43:13,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975024642] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:43:13,479 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:43:13,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27, 27, 29, 29] total 80 [2021-11-23 17:43:13,480 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600674822] [2021-11-23 17:43:13,480 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:43:13,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2021-11-23 17:43:13,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:43:13,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-11-23 17:43:13,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1181, Invalid=5139, Unknown=0, NotChecked=0, Total=6320 [2021-11-23 17:43:13,482 INFO L87 Difference]: Start difference. First operand 395 states and 536 transitions. Second operand has 80 states, 80 states have (on average 1.1) internal successors, (88), 80 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:44:38,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:44:38,136 INFO L93 Difference]: Finished difference Result 740 states and 998 transitions. [2021-11-23 17:44:38,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 204 states. [2021-11-23 17:44:38,138 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 1.1) internal successors, (88), 80 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-11-23 17:44:38,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:44:38,142 INFO L225 Difference]: With dead ends: 740 [2021-11-23 17:44:38,142 INFO L226 Difference]: Without dead ends: 680 [2021-11-23 17:44:38,146 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 265 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21948 ImplicationChecksByTransitivity, 88.3s TimeCoverageRelationStatistics Valid=10235, Invalid=60787, Unknown=0, NotChecked=0, Total=71022 [2021-11-23 17:44:38,147 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 616 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 2313 mSolverCounterSat, 901 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 616 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 3487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 901 IncrementalHoareTripleChecker+Valid, 2313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 273 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2021-11-23 17:44:38,147 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [616 Valid, 128 Invalid, 3487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [901 Valid, 2313 Invalid, 0 Unknown, 273 Unchecked, 4.4s Time] [2021-11-23 17:44:38,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 680 states. [2021-11-23 17:44:38,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 680 to 521. [2021-11-23 17:44:38,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 521 states, 520 states have (on average 1.3711538461538462) internal successors, (713), 520 states have internal predecessors, (713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:44:38,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 713 transitions. [2021-11-23 17:44:38,268 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 713 transitions. Word has length 30 [2021-11-23 17:44:38,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:44:38,268 INFO L470 AbstractCegarLoop]: Abstraction has 521 states and 713 transitions. [2021-11-23 17:44:38,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 1.1) internal successors, (88), 80 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:44:38,269 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 713 transitions. [2021-11-23 17:44:38,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-23 17:44:38,270 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:44:38,270 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 6, 2, 1, 1, 1, 1, 1, 1] [2021-11-23 17:44:38,282 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-11-23 17:44:38,484 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (32)] Forceful destruction successful, exit code 0 [2021-11-23 17:44:38,702 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-11-23 17:44:38,882 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:44:38,882 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:44:38,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:44:38,883 INFO L85 PathProgramCache]: Analyzing trace with hash -1120723122, now seen corresponding path program 8 times [2021-11-23 17:44:38,883 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:44:38,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [774375868] [2021-11-23 17:44:38,883 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 17:44:38,883 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:44:38,883 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:44:38,884 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:44:38,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-11-23 17:44:38,908 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 17:44:38,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:44:38,910 WARN L261 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-23 17:44:38,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:44:40,120 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:44:40,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:44:44,019 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 2 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:44:44,019 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:44:44,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [774375868] [2021-11-23 17:44:44,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [774375868] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:44:44,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1379797452] [2021-11-23 17:44:44,020 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 17:44:44,020 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:44:44,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:44:44,021 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:44:44,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2021-11-23 17:44:44,087 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 17:44:44,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:44:44,089 WARN L261 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-23 17:44:44,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:44:44,621 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:44:44,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:44:45,286 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 2 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:44:45,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1379797452] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:44:45,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923733912] [2021-11-23 17:44:45,287 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 17:44:45,287 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:44:45,287 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:44:45,288 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:44:45,290 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-11-23 17:44:45,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 17:44:45,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:44:45,320 WARN L261 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-23 17:44:45,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:44:46,098 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:44:46,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:44:52,124 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:44:52,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923733912] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:44:52,125 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:44:52,125 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27, 27, 29, 29] total 80 [2021-11-23 17:44:52,125 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490945400] [2021-11-23 17:44:52,126 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:44:52,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2021-11-23 17:44:52,126 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:44:52,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-11-23 17:44:52,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1157, Invalid=5163, Unknown=0, NotChecked=0, Total=6320 [2021-11-23 17:44:52,128 INFO L87 Difference]: Start difference. First operand 521 states and 713 transitions. Second operand has 80 states, 80 states have (on average 1.1) internal successors, (88), 80 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:46:10,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:46:10,454 INFO L93 Difference]: Finished difference Result 788 states and 1078 transitions. [2021-11-23 17:46:10,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 177 states. [2021-11-23 17:46:10,454 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 1.1) internal successors, (88), 80 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-11-23 17:46:10,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:46:10,458 INFO L225 Difference]: With dead ends: 788 [2021-11-23 17:46:10,458 INFO L226 Difference]: Without dead ends: 714 [2021-11-23 17:46:10,462 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 239 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17136 ImplicationChecksByTransitivity, 83.5s TimeCoverageRelationStatistics Valid=9117, Invalid=48723, Unknown=0, NotChecked=0, Total=57840 [2021-11-23 17:46:10,462 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 409 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 2173 mSolverCounterSat, 670 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 409 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 3010 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 670 IncrementalHoareTripleChecker+Valid, 2173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 167 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2021-11-23 17:46:10,463 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [409 Valid, 171 Invalid, 3010 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [670 Valid, 2173 Invalid, 0 Unknown, 167 Unchecked, 3.8s Time] [2021-11-23 17:46:10,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 714 states. [2021-11-23 17:46:10,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 714 to 564. [2021-11-23 17:46:10,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 564 states, 563 states have (on average 1.3658969804618117) internal successors, (769), 563 states have internal predecessors, (769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:46:10,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 564 states to 564 states and 769 transitions. [2021-11-23 17:46:10,631 INFO L78 Accepts]: Start accepts. Automaton has 564 states and 769 transitions. Word has length 30 [2021-11-23 17:46:10,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:46:10,632 INFO L470 AbstractCegarLoop]: Abstraction has 564 states and 769 transitions. [2021-11-23 17:46:10,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 1.1) internal successors, (88), 80 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:46:10,632 INFO L276 IsEmpty]: Start isEmpty. Operand 564 states and 769 transitions. [2021-11-23 17:46:10,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-23 17:46:10,633 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:46:10,634 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 5, 3, 1, 1, 1, 1, 1, 1] [2021-11-23 17:46:10,656 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2021-11-23 17:46:10,854 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (35)] Forceful destruction successful, exit code 0 [2021-11-23 17:46:11,075 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2021-11-23 17:46:11,253 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:46:11,253 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:46:11,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:46:11,254 INFO L85 PathProgramCache]: Analyzing trace with hash -1378888560, now seen corresponding path program 9 times [2021-11-23 17:46:11,255 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:46:11,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [358007888] [2021-11-23 17:46:11,255 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 17:46:11,255 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:46:11,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:46:11,256 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:46:11,261 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2021-11-23 17:46:11,297 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-11-23 17:46:11,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:46:11,299 WARN L261 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-23 17:46:11,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:46:13,862 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 3 proven. 89 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:46:13,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:46:19,479 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 9 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:46:19,479 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:46:19,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [358007888] [2021-11-23 17:46:19,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [358007888] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:46:19,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [187660427] [2021-11-23 17:46:19,479 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 17:46:19,479 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:46:19,479 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:46:19,480 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:46:19,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (38)] Waiting until timeout for monitored process [2021-11-23 17:46:19,545 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-11-23 17:46:19,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:46:19,547 WARN L261 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-23 17:46:19,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:46:20,417 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 3 proven. 89 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:46:20,417 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:46:21,575 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 9 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:46:21,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [187660427] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:46:21,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108202262] [2021-11-23 17:46:21,576 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 17:46:21,576 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:46:21,576 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:46:21,577 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:46:21,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_640c6691-a532-4708-af31-0f8cdaa76b23/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-11-23 17:46:21,616 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-11-23 17:46:21,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:46:21,618 WARN L261 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-23 17:46:21,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:46:24,652 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:46:24,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:46:28,531 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:46:28,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108202262] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:46:28,531 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:46:28,531 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28, 28, 29, 29] total 84 [2021-11-23 17:46:28,531 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490606729] [2021-11-23 17:46:28,532 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:46:28,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2021-11-23 17:46:28,532 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:46:28,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2021-11-23 17:46:28,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1385, Invalid=5587, Unknown=0, NotChecked=0, Total=6972 [2021-11-23 17:46:28,533 INFO L87 Difference]: Start difference. First operand 564 states and 769 transitions. Second operand has 84 states, 84 states have (on average 1.0714285714285714) internal successors, (90), 84 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)